Posts Tagged IP

A set of geophysics for Iron Oxide Copper Gold deposit in Quebec

Posted by on Thursday, 17 July, 2014
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Honey Badger Exploration Inc.  has completed the interpretation of the geophysical data over the Delhi Pacific copper showing on its Sagar Property. The coincident gravity, magnetic, electromagnetic (“EM”) and induced polarization (“IP”) anomaly associated with the Delhi showing are typical of those expected from an Iron Oxide Copper Gold (“IOCG”) deposit.

The IOCG model is further supported by the presence of a favourable structural setting for an IOCG deposit, namely the abundance of polymetallic showings (copper-gold-silver-cobalt) and the presence of diagnostically verified IOCG hydrothermal alteration.

At the Delhi Pacific showing, historical significant drilling intersections include 45.81 metres @ 0.51% copper and 10.7 metres @ 0.78% copper. While these intersections were not tested for silver, gold or cobalt, historic and recent grab samples* contain up to 1.8 grams per ton (“g/t”) gold, and up to 35 g/t silver.

*Grab samples are selective by nature and are unlikely to represent average grades of the deposit(s).

The selection of new drill targets is based on an interpretation of the IP/Resistivity, airborne magnetics, ground gravity and airborne EM data. In the winter of 2014 ClearView Geophysics Inc. completed a Surface Spectral IP survey over part of and extending east of the Delhi Pacific showing (Figure 1).

To view ‘Figure 1 – Surface Spectral Induced Polarization survey location lines’, please visit the following link:http://media3.marketwire.com/docs/honef10715.pdf

The interpretation indicates an anomaly associated with the historic drilling at Delhi that increases both in intensity and size east of these drill holes for more than 1.5 kilometres. The apparent resistivity data is presented in Figure 2 (red-purple indicates low resistivity and represents the target area):

Figure 2 – Resistivity Data at Delhi Pacific

The gravity data indicates that the southwest side of the magnetic high zone at Delhi Pacific coincides with a gravity low feature, whereas to the north is a gravity high. This indicates that the resistivity low/chargeability/electromagnetic target is located along a major structure that represents a favourable event for IOCG mineralization. The target area at Delhi covers more than 3 square kilometres: approximately 1.5 kilometres in strike length multiplied by an average width of 200 metres (Figure 3).

‘Figure 4 – Magnetic Inversion over Delhi Pacific’


IP and magnetic surveys in Ontario for gold

Posted by on Thursday, 26 June, 2014

HARTE GOLD CORP. (“Harte Gold”)CA:HRT -8.70% (frankfurt:H4O) is pleased to announce the completion of the expanded Phase Two Induced Polarization (“IP”) survey on the Sugar Zone Property, located 60 kilometers east of the Hemlo gold mines currently being operated by Barrick Gold Corporation.

Phase Two IP Survey

The survey was successful in identifying significant extensions to the five high priority IP anomalies located “up- ice” of the Peacock boulder train identified in the Phase One survey (see news release dated June 2, 2014). In addition, significant extensions to both the Wolf Zone and the Sugar Zone Deposit were discovered, as well as several new IP anomalies en echelon to each of the Wolf Zone and Sugar Zone Deposit. See attached map.

The five high priority IP anomalies were traced an additional 700 meters to the north. These IP anomalies are now 1,200 meters long while other parallel anomalies are 1,000 meters to 1,600 meters in length.

Magnetometer Survey

A detailed ground Magnetometer (“Mag”) survey has been completed over the entire grid covered by the two IP surveys. The Mag survey took readings every two meters and will assist in classifying the IP anomalies and help to define structures that are controlling mineralization and/or off-setting zones, as well as locate any younger mafic dikes (diabase dikes) that cut across the stratigraphy.

In the course of cutting and traversing the grid, many newly discovered rusty boulders have been located as well as other angular sericitic slabs. A program of detailed mapping, boulder tracing and sampling, and a limited till sampling program will be carried out over the next three weeks prior to drilling in order to properly prioritize drill targets. This occurrence of mineralized boulders suggests there may be a number of bedrock sources for any new mineralization. Every IP anomaly found in the survey area will be tested in order to confirm mineral content.


Induced Polarization Survey in Newfoundland

Posted by on Wednesday, 25 June, 2014

Canstar Resources Inc.  announces the commencement of its summer exploration program, beginning with a ground geophysical survey at its Mary March Property near Buchans Junction, Newfoundland. Canstar will be implementing a deep-penetrating induced polarization (or “IP”) geophysical survey in order to enable maximum depth visualization on the property, with focus on the wide mineralization encountered near the Nancy April Zone. This type of technology and depth penetration represents the most detailed and comprehensive survey of its kind to have ever been conducted on the property and utilizes state-of-the-art geophysical methods. The results of this survey will be used for target generation where any new targets will be drilled in the subsequent drilling program also anticipated in the coming months.

2014 Induced Polarization Survey

In contrast to previous geophysical methods utilized on the Mary March Property throughout its exploration history, the IP method is not hindered by potential poor conductivities. It is now well established that the prevalent mineralization at Mary March is very similar to that of the former producing Buchans Mine, which is that of a zinc-rich mineralization with poor electro-conductive properties; the Buchans Mine was one of Canada’s all-time highest grade VMS ore producing 16.2 million tonnes averaging 14.50% Zn, 7.56% Pb, 1.33% Cu, 126 grams per tonne (g/t) Ag and 1.37 g/t Au between 1928 and 1984. By utilizing an IP geophysical method, Canstar hopes to detect these otherwise difficult-to-find mineralized areas where we understand there to be the highest potential for mineralization based on geology and previous drilling. The technology for IP geophysical methods has advanced in the last decade such that detection capabilities are now common to vertical depths in excess of 300 meters. Such advancements will greatly enhance Canstar’s capability in unraveling both the mineralization on the Mary March Property and the structure that controls it.

Details about the project (pdf)


IP geophysical survey in the Lake Victoria goldfield of Tanzania

Posted by on Monday, 9 June, 2014

Tembo Gold Corp. (TSX VENTURE:TEM) (FRANKFURT: T23) (“Tembo” or the “Company”) is pleased to report progress on its 2014 work program on the Buly Trend target area on the Tembo Property in the Lake Victoria goldfield of Tanzania. A first drill hole has tested the Buly trend in the vicinity of artisanal workings and an IP geophysical survey has been completed and an initial diamond drill hole through a resulting significant anomaly has commenced. This anomaly is located along the interpreted projected extension of the structure that hosts the Reef 1 orebody at Bulyanhulu Mine.

IP Geophysical Survey
Spectral Geophysics has recently completed an IP survey measuring chargeability and resistivity. The survey was designed to probe to depths in excess of 800m, over a grid adjacent to the Bulyanhulu-Tembo boundary. Initial 200m spaced northeast oriented lines identified areas of interest over which the line spacing was closed to 100m to improve the 3-D model resolution.

The IP survey has revealed a weak sub-vertical chargeability anomaly, developed to a depth exceeding 650m along the Reef 1 trend commencing some 1500m from the boundary with the Bulyanhulu mining licence. This anomaly weakens slightly towards the northwest but approximately 400m further in this direction it strengthens significantly, particularly at depth and for 700m to the northwest to the end of the surveyed grid. The geophysical interpretation indicates that the chargeability response is increasing towards the end of the grid and becoming shallower and is open in that direction. The 3-D modeling of the geophysical response has provided the necessary information to plan initial test drill holes.

A second chargeability anomaly is located approximately 500m to the north, extending in depth from -50m to -450m where it becomes weaker. This anomaly extends some 600m along a northwest trend, parallel to the anomaly that is now being drilled.

Highlights of the Buly Trend work program include:

  • A strong magnetic lineament characterizes the interpreted extension of the structure hosting Reef 1 at Bulyanhulu Mine;
  • A 200m artisanal working is located along this trend;
  • TDD0001, drilled through this lineament beneath the workings, intersected a strong broad brittle-ductile shear zone with associated quartz veining but little sulphide and minor Au;
  • Initial IP has revealed a strong chargeable and resistive zone along strike at depth to the northwest along the trend at the Ngula 2 target, which has a highly active artisanal working located immediately to the northeast at surface;
  • The Ngula 2 target has consistently returned high grades from grab samples of the artisanal production: and
  • Drilling of the first drillhole to test the IP chargeability anomaly has commenced.

David Scott President & CEO stated, “The Buly Trend has for very obvious reasons always been considered an important target for the Company. The initial drillhole confirmed that at least one and probably more major shear zones are present in this area and appear to relate directly to the northwest extension of the Bulyanhulu system. The just-completed IP survey now provides us with strong evidence of potential sulphide mineralization possibly associated with a strong shear structure along this same Buly trend. The outcome of the first drillhole testing the chargeability zone is eagerly anticipated. “

Geology of the Buly Trend
The geology of the Bulyanhulu Mine sequence trends northwest into the Tembo licence area. Two northwest-trending structures that host the resource at Bulyanhulu (Reef 1 and Reef 2 450-500m apart), are believed to continue in a northwesterly direction through the boundary separating the properties. Reef 1 is located in a brittle-ductile shear structure located largely within an argillaceous meta-sediment on a mafic-felsic metavolcanic contact. A number of other sub-parallel magnetic lineaments are evident across a broad northwest-striking metavolcanic sequence. These structures commonly occupy contacts between individual lithological units consisting of stacked metavolcanic flows, alternating mafic and felsic meta-volcanic rocks and associated meta-sediments.


The borehole IP survey near Val d’Or, Quebec

Posted by on Friday, 9 May, 2014

Alexandria Minerals Corporation  reports on preliminary results from the recently completed, down-hole Induced Polarization (“IP”) Survey on its Akasaba property. Survey results yielded several strong targets on both the main Akasaba Mine Trend and the nearby parallel North Zone, adding to high priority drill targets in preparation for this summer’s drill program.

The principal geophysical targets on the main Akasaba and North Zones are up to 400m long along strike, open to the east, and open at depth. The anomalies, located below and to the east of the Akasaba Current Resources, are similar to those intersected by previously completed gold-bearing drill holes that contain 11.35 g/t Au over 6.0 m, 6.19 g/t Au over 5.05 m, and 4.69 g/t over 5.00 m (see Figures 1 and 2 below).

To view Figure 1, please visit the following link: http://media3.marketwire.com/docs/Figure1_AZX.pdf.

Eric Owens, President and CEO, stated “These are very encouraging results, and we are looking forward to testing these targets with drill holes. Through geophysical surveys and this past winter’s drilling, we have generated several strong targets for this summer’s 10,000 m drill campaign in an effort to build on our existing gold resources. We are still awaiting further geophysical results and drill assay results, which should provide further targets for testing.”

To view Figure 2, please visit the following link: http://media3.marketwire.com/docs/Figure2_AZX.pdf.

The borehole geophysical (Hole-to-Hole Resistivity/IP) survey was conducted during the winter by Abitibi Geophysics. The survey was designed to investigate potential targets at depth around the Akasaba Current Resources. The survey used a conventional induced polarization technique, with a borehole-to-borehole array based on 19 pairs of holes. Once all the data combinations are collected, a 3D inversion uses all the readings simultaneously in order to estimate the location and volume of the anomalies. Validation of the geophysical results are provided by past Alexandria drill hole assays, which show excellent correlation between well mineralized gold-bearing zones and strong Induced Polarization anomalies.

Elsewhere, the Company is awaiting assay results from the recently completed 4,000 m drill program on its Sleepy project, located 12 km east of the Akasaba project.

GEOLOGY

The Akasaba property straddles the Cadillac Tectonic Zone (CTZ) and is underlain by the Val d’Or Formation, Heva Formation, Cadillac, Piche and Pontiac Groups. The main Mine Horizon lies approximately 600 m north of the CTZ and consists of basalt-andesite-rhyolite volcaniclastic rocks, tuffs and flows intruded by gabbro and diorite sills, and is bound on the south by massive dacite.

Akasaba hosts polymetallic mineralization, with widespread silver (up to 50 g/t) and copper (generally 0.2-0.4%, locally up to 1-2%), and local high grade zinc (up to 6.35% Zn over 0.3 m in a massive sphalerite-pyrrhotite layer), and local molybdenum. The following characteristics are pertinent to the any operating model:

  • Gold and gold-copper resources are hosted in a shear zone (the “Mine Horizon”)
  • There are numerous similar sub-parallel gold mineralized zones in addition to the Mine Horizon
  • The Callahan tonalite intrusion, which is located a short distance northwest of the deposit has a prominent metamorphic/metasomatic halo, characterized by widespread and locally intense calcium and iron metasomatism (“Skarn”), in the form of epidote, chlorite, magnetite, amphibole, garnet
  • The Mine Horizon, with gold , copper and molybdenum, and other base metals, occurs within the metasomatic halo
  • Within the Mine Horizon, there is an east west zonation relative to the Callahan Intrusive: proximal Au-Cu-Mo, medial Gold (+/- Ag, Cu), distal Ag, Zn
  • Host volcanic rocks contain up to 30% or more pyrrhotite (+/- Chalcopryite, Sphalerite) as lenses, pods and layers, and massive layers of intergrown pyrrhotite and sphalerite, suggesting a component of synvolcanic mineralization probably unrelated to gold.

Such characteristics are similar to those found in the La Ronde-Doyon-Bousquet district 45 km to the west, a gold-copper-zinc enriched mining district which has seen more than 26 million ounces of gold produced from a 7 km long trend, a trend that is 1/5 of the size of Alexandria’s property.


Airborne and ground geophysics for precious metal project in Mexico

Posted by on Monday, 5 May, 2014

Orex Minerals Inc. announces completion of an airborne geophysical survey at its Los Crestones precious metal project, Sinaloa, Mexico. The 4,168 hectare helicopter-borne radiometric and magnetic survey was flown at 50m line spacing by MPX Geoservices Ltd. Data are being processed and results are expected in the coming weeks. In addition, Orex has signed a contract with Quantec Geoscience Ltd (“Quantec”) to undertake an 18 line-kilometre TITAN 24 DCIP (Direct Current resistivity and Induced Polarization chargeability) ground geophysical survey.

The proposed survey comprises 5 lines, each 3.6km long and 400m apart and will be the first ground geophysical survey to be conducted at Los Crestones. During the work Quantec will also collect MT (Magnetotelluric resistivity) data on the central grid line. Scheduled to commence mid-May, the survey is centred over mineralized structures previously tested by shallow diamond drilling in 2011. Orex expects the results to augment existing geophysical, geochemical and geological datasets and intends to use the results to identify additional areas for drill testing later in 2014. Surveying and clearing of grid lines is currently underway.

According to Orex’s President, Gary Cope, “The known mineralized structures may be only a portion of the bigger picture at Los Crestones. Utilization of airborne and deep penetrating surface geophysics at this stage of exploration will allow our geological team to refine drill targets for testing in the latter half of 2014. “

The property was drilled previously by Astral Mining Corporation (“Astral”) now merged with Orex (news release February 12th, 2013). In late 2011 Astral completed 2,618m of HQ and NQ diameter core drilling in 18 holes. Drilling tested three mineralized structures which outcrop at surface. Significant intercepts were identified in many of the holes and may be viewed at www.orexminerals.com/s/Drilling-LosCrestones.asp. Reported results included a best intercept of 5m averaging 39.1 g/t Au, 93.3 g/t Ag and 2.13% Cu from 55m depth in HQ drillhole 11LD011. True width of this interval from the Bohemia structure is approximately 3.53m.

LOS CRESTONES GOLD-SILVER-COPPER PROJECT SINALOA, MEXICO

The Los Crestones project totals 4,168 hectares and is prospective for economic gold, silver and copper mineralization. Mineralization includes north-south oriented structural zones hosting quartz veins, quartz stockworks and breccia fill possibly related to a deeper porphyry and/or diatreme system. Three main structural zones were targeted in the first phases of work. Corona, Bohemia and Indio are elongate structures recognized on surface as erosion-resistant silicified ribs or “crestons”. The airborne and ground geophysical programs commissioned by Orex are designed to complement ongoing geological mapping and geochemical sampling. Orex intends to develop drill targets over the summer; diamond drilling is scheduled for late 2014.

Geology and Mineralization

The property is underlain primarily by volcanic and intrusive rocks. At lower elevations andesite and dacite are seen within an erosional window in creeks and drainages and are representative of the “Lower Volcanic Sequence” commonly recognized throughout western Mexico. At higher levels the sequence is capped by rhyolites of the “Upper Volcanic Sequence”. Felsic to intermediate intrusive rocks are also observed over a large proportion of the property. The INEGI 1:50,000 G13-C12 map sheet depicts two intrusive bodies on Los Crestones though Orex geologists have observed outcropping intrusive material across the property.

Mineralization is concentrated within a series of silicified, north-south trending quartz stockwork and breccia zones most prominent in the southern half of the property. Three structures subject to the most work to date are named “Corona”, “Bohemia” and “Indio”. Historically these structures have been tested in small pits and underground workings, many of which are still accessible today, the largest comprising some 40 m of development. Additional mineralized structures have also been identified and require follow up work.


Airborne and ground geophysical surveys in Dominican Republic

Posted by on Tuesday, 29 April, 2014

GoldQuest Mining Corp.  announces that the Company has completed an airborne ZTEM geophysical survey covering its 100% owned Tireo Project, and has initiated its 2014 exploration program. Geotech Limited of Canada has flown 3,285 kilometers of flight lines, with investigation depths reaching 1.6 kilometers, allowing the Company to quickly and effectively evaluate the geological and mineral potential of the Tireo Project.

Results of the ZTEM Survey show:

  • A strong correlation between the Romero and Romero South mineralization
  • The Romero resistivity trend extends northwards over 1 kilometer past existing drilling and 0.5 kilometers south of Romero South
  • Additional new trends have been identified from the survey and field crews have been mobilized for ground follow up carrying out ground geophysics, along with geological and alteration mapping
  • An Induced Polarization (“IP”) program has been commenced over ZTEM targets

“The ZTEM survey has revealed a strong correlation between the new survey data and mineralization at Romero and Romero South,” commented Julio Espaillat, GoldQuest’s CEO, “The survey has provided us with key insights into the conductivity, magnetism, alteration and structure of the Tireo belt, with numerous targets showing similar properties to that of Romero. We are identifying exploration targets, and plan to announce the commencement of drilling shortly, to compliment the Romero Project’s Preliminary Economic Assessment (PEA) expected in the coming weeks.”

2014 Exploration Update:
Following the ZTEM survey, the Company is evaluating and ranking its regional exploration targets. The 2014 field exploration program has commenced and a focused ground IP program is underway. Insight Geophysics of Oakville, Ontario, Canada is on site completing the ground IP program. The IP program is designed to identify chargeable zones along the regional trends identified by the ZTEM survey and mapping. The starting point for the IP program was along trend and directly north of Romero. The Company anticipates that IP surveying will continue for several months. Two drill rigs are stationed at the Company’s field camp next to Romero. The Company will initially mobilize one drill rig and expects to commence drilling by the end of April.

At December 31, 2013, the Company had approximately $11 million in treasury and is funded to complete the 2014 work programs and beyond.

The data in this press release has been reviewed and approved by Mr. Jeremy Niemi, P.Geo., the Director, Technical Services of GoldQuest and a Qualified Person for the technical information in this press release under NI 43-101 standards.


Exploration on Éléonore Gold project, Québec

Posted by on Friday, 14 March, 2014

Midland Exploration Inc.  reports the beginning of its exploration activity on its 100% owned James Bay Éléonore Gold project located in James Bay, Québec. The first phase of the 2014 exploration program consists of a helicopter airborne magnetic geophysical survey over the Éléonore Centre property.

The Eléonore project, which encompasses the Éléonore Centre and West properties, is constituted of a total of 247 claims covering 128 square kilometres, and is located approximately 30 kilometres southwest from and in a geological environment similar to Goldcorp Inc.’s Éléonore deposit. This world-class gold deposit contains reserves of 4.03 Moz Au (proven and probable categories), combined measured and indicated resources of 4.84 Moz Au and inferred resources estimated at 4.10 Moz Au. (Source: Goldcorp press release dated February 13, 2014).

Prospecting conducted by Midland from 2009 to 2013 on the Éléonore Centre property identified the presence of several gold showings associated with quartz-tourmaline pyrite bearing veinlets occurring in sheared metasediments, as well as mafic and felsic metavolcanics which returned up to 18.8 g/t Au. These results strongly suggest that an auriferous hydrothermal system is present on the property by a strong abundance of quartz-tourmaline veins over a plurimetric area. In addition, the 2013 ground induced polarisation (“IP”) survey identified many north-south trending IP anomalies and several remain unexplained. The 2011 soil geochemistry survey permitted to delineate a series of As-Cu-Sb anomalies clustered along a north-south-trending axis. Finally, a series of parallel northeast trending AeroTEM II conductors were outlined by the 2010 airborne geophysical survey which targeted sulfide bearing Éléonore-type sediments on the northern part of the Éléonore Centre property. Some of these conductors coincide with uncovered gold-bearing disseminated to semi-massive sulfides zones identified by Midland and several EM anomalies still remain unexplained.

A high definition airborne magnetic survey covering the Éléonore Centre property was just completed, including the area covered by the 2013 IP survey. The results and interpretation of this survey, totalizing 386 linear kilometres, are pending. Furthermore, preparation for the upcoming 2014 summer exploration program on the Éléonore Centre property currently underway.

Location:

  • The Eleonore property is located about 450 kilometres north of the town of Matagami, in the Opinaca Reservoir area, James Bay, Quebec.

Property:

  • The Eleonore property consists of two claim blocks (Centre and West). The Centre Block consists of 121 claims covering a surface area of about 63 square kilometres, whereas the West Block consists of 109 claims covering about 57 square kilometres. The two blocks are located about 30 kilometres southwest of the Roberto deposit on the Eleonore property held by Goldcorp, where measured and indicated resources are estimated at 3.15 million ounces of gold and inferred resources at 6.25 million ounces of gold.

Highlights:

  • Covers a major N-S-trending structure between metasedimentary rocks and metavolcanic rocks interpreted as the extension of the structure occurring near the Eleonore gold deposit.
  • Prospecting work has uncovered many new gold showings associated with metasedimentary rocks (conglomerates and greywackes):
    • Golden Gun showing: 18.8 g/t Au, 13.6 g/t Au, 0.76 g/t Au
    • Golden Gun West showing : 1.69 g/t Au
    • Aston Martin showing : 1.63 g/t Au
    • Gold Finger showing: 1.01 g/t Au, 0.82 g/t Au
    • Golden Eye showing: 1.90 g/t Au, 0.90 g/t Au
    • Casino showing: 0.76 g/t Au, 0.64 g/t Au
  • Located along a regional metamorphic gradient, typical of the contact between the La Grande and Opinaca groups.
  • New soil (humus) geochemistry anomalies identified in the south part of the Eleonore Centre Block.

Coincident Geochemical and Geophysical Data Pinpoints Drill Targets, Greyhound, Nunavut

Posted by on Saturday, 1 March, 2014

Aura Silver Resources Inc. announces the results of a comprehensive report completed by L.E Reed Geophysical Consultant Inc. (“Reed”) which supports, from a geophysical standpoint, drill targets established geochemically by Activation Laboratories Ltd. (Actlabs) Spatiotemporal Geochemical Hydrocarbon (“SGH”) technology for the Aura Lake area as well as the Dingo prospect north-west of Aura Lake, both part of the Greyhound Project, NU.

As reported by Reed, “Correlations between the geochemistry and various geophysical data suggest support for the possible identification of gold and silver deposits at Aura Lake and a gold and copper deposit at Dingo”. This report may be accessed at the Company’s web-site (http://www.aurasilver.com/s/Home.asp) under the section Projects / Canada.

The potential sources of high-grade gold boulders (up to 28 g/t) and high-grade silver (up to 5,300 g/t) have been identified in close proximity to Aura Lake. The gold and copper targets at the Dingo prospect area north-west of Aura Lake are surface showings. New interpretation of geophysical data and SGH has refined the drill targets. This geophysical analysis has identified multiple structures/contacts with the use of three-dimensional inversion imagery of airborne VTEM EM and magnetic responses and ground Induced Polarization and Resistivity data. These structures/contacts at Aura Lake may have provided a pathway for fluids carrying mineralization and are interpreted to support the drill targets originally defined by geochemical analysis.

Robert Boaz CEO and President of Aura Silver states that, “The detailed geophysics analysis undertaken by Reed gives us further comfort that we are zeroing in on the source of high-grade surface gold, silver and copper mineralization. Despite the difficult market for all junior exploration companies we continue to enhance the value of our properties.”

During the fall of 2006, an airborne MEGATEM® geophysical survey was flown on the initial property by Fugro Airborne Surveys Corp. In 2007, further prospecting of MEGATEM anomalies took place. Samples collected in 2007 contained up to 2.4% zinc (Zn), 1.02% copper (Cu), 8.1% lead (Pb), 10g/t gold (Au) and 51 g/t silver (Ag) highlighting the potential for discovery of VMS (volcanogenic massive sulphide) ores.

During 2008, Fugro completed the flying of a GEOTEM® survey over the new Greyhound claim group. Results from this survey were utilized in an on-the-ground field program to complete geological mapping and sampling. Samples prospected during 2008 contained up to 4.1% Cu, 13.4% Zn, 8% Pb, 2,700 g/t Ag and 28g/t Au and to the northeast of Aura Lake a series of boulders contained up to 18.5% Zn and 9.2% Cu.

In late 2009, a high precision VTEM® helicopter borne electro-magnetic survey was completed.


IP survey at a project in the Dominican Republic

Posted by on Tuesday, 18 February, 2014

Precipitate Gold Corp.  announces it has initiated a ground Induced Polarization (“IP”) geophysical survey at the Company’s 100% owned Juan de Herrera project in the Dominican Republic.

Insight Geophysics Inc. (“Insight”) has been contracted to conduct the survey and crews have commenced grid line cutting and ground preparations in advance of the project’s maiden geophysical survey. Crews will establish a control grid over the project’s Ginger Ridge Zone, where the Company’s previous surface work outlined a gold-rich geochemical anomaly measuring 1,000 metres by 400 metres and yielded highlight rock grab sample values up to 11.8 grams per tonne (“g/t”) gold and 100 g/t silver, as well as a 13.0 metre continuous channel sample that returned 1.5 g/t gold and 20 g/t silver, open in both directions.

Precipitate’s President & CEO, Jeffrey Wilson stated “We’re excited to commence this program, as induced polarization geophysical surveying has proven to be an effective exploration technique at other projects within the Tireo volcanic belt. It was an important targeting tool at other notable recent discoveries within the Tireo belt, particularly those of GoldQuest Mining and Unigold Inc. We’re pleased to be working with Insight on this important next phase of exploration work at our Juan de Herrera concession, as its local experience and expertise offers Precipitate an advantage in data compilation aimed at identifying anomalies and delineating possible drill targets.”

Insight’s IP survey will measure the relative chargeability and resistivity of underlying rock and highlight areas that may contain higher sulphide and/or resistive silica concentrations. Previous work in the Tireo belt, by Insight and others confirmed a correlation between high chargeability and sulphide mineralization at the Romero and Candelones discoveries. The attached map shows the approximate outline of the proposed grid to be emplaced in relation to existing soil geochemical anomalies and grab/channel sample results at Ginger Ridge. IP surveying will start near the centre of the grid and can be expanded based on interpretation of results as they are generated. The survey is expected to provide a greater understanding of the subsurface mineralization and geometry and assist in prioritizing targets for follow up trenching and/or a first-phase drill program.


IP data analysis at copper-gold project in Mongolia

Posted by on Monday, 10 February, 2014

Kincora Copper Limited  provides an overview on an internal interpretations of last years exploration programme at Kincora’s flagship Bronze Fox license (Oyu Tolgoi South Gobi porphyry copper belt in southeast Mongolia) having integrated them with previous geology and geophysical results. This follows the recent receipt of positive findings from three independent consultants, further reinforcing an independent groups’ technical review late 2012, advancing and refining multiple bulk tonnage copper porphyry targets.

Some of the Key findings include:

  • Previous results coincident with lower priority Induced Polarization (IP) chargeability anomalies supporting IP being an effective exploration tool
  • Multiple large-scale copper porphyry targets with favourable geology and geophysics drill ready supporting the possibility of bulk tonnage ore mineralization in “finger type” porphyries similar to Oyu Tolgoi or Northparkes in New South Wales
  • Happy Geo prospect has emerged as an attractive, earlier stage, at or near surface follow up exploration target, plus the potential for porphyry targets at depth

 

 

 

 

 

 

 

 

Commenting on today’s announcement, Sam Spring, President and CEO of Kincora, said:

“Internally we are very pleased because drilling in late 2012 was extremely encouraging with localized higher grade, for example over 4% copper in our last hole, and broad lower grade intersections, including at least 800m @ +0.40% CuEq, with 37m @ +1% CuEq, in an earlier hole. Our 2013 field season deployed some of the same wide ranging and detailed exploration techniques used at Oyu Tolgoi to significantly increase the confidence in high priority, and large scale targets that demonstrated exceptional corresponding prospectivity. Last years’ activities, independent consultants analysis and discussions with various industry groups have assisted to “explain” previous results, convincingly prove a fertility signature for copper porphyries and in de-risking multiple drill ready targets.

Considering the size of the anomalies and advance stage of target areas, two key attractions and relatively unique characteristics of Bronze Fox, successful proof of concept activities in 2014 could provide visibility of significant copper-gold resource potential of Oyu Tolgoi or finger style copper porphyries. While earlier stage, the Happy Geo prospect has too emerged as an attractive exploration target, reinforcing that Bronze Fox continues to look better as more activities are undertaken. Kincora is persisting with additional measures to add shareholder value and is encouraged by initial, and further proposed, reform to the Mongolian mineral sectors legislative environment, amongst other efforts to provide additional advantages to the private sector.”

 

 

 

 

 

 

 

 

 

Copper-gold porphyry targets refined and de-risked

Since 2010, Kincora has undertaken soil geochemistry, Vector IP and some sections of DDIP, ground magnetic surveys, and drilled a further 70 holes inside of the Bronze Fox license area. Drilling has expanded the known mineralization footprint to about 40km2, remaining open, confirming porphyry style of copper-gold resource potential with extensive lower grade intersections from at or near surface and proven to 1,360 metres. Results of the last drilling programme, in late 2012 were extremely encouraging with a number of porphyry intersections confirming the potential for a high-grade deposit (localized +4% Cu in our last hole – F72 – drilled into a new target area based upon then recent IP analysis) with broad lower grade (eg +800m @ +0.40%CuEq, including 37m @ greater than 1% CuEq – F62) intersections.

Previous geology and geophysics supported the potential of a copper-gold resource. Indeed early stage studies had commenced on a potentially small scale near production heap-leach SX-EW operation utilising near surface oxide mineralization, and deeper drilling results at the end of the 2012 confirmed the potential for high-grade copper porphyry mineralization. However, the lack of IP data below 400 metres depth, and only in certain areas, limited the ability to reconcile previous drilling and indications of significant scale hydrothermal fluids that support potential concealed higher grade copper porphyry mineralization. Given the limited zones of outcropping primary mineralization, known regional (block) faulting and target of Oyu Tolgoi (‘OT’) or finger porphyry style copper systems, Induced Polarization, coupled with existing magnetics, has been proven to be an effective exploration tool when integrated with proper geological information and interpretation. The success of similar IP programmes at OT and the technical successes experienced by Kincora in late 2012, with drilling at previous IP anomalies returning alteration, sulfides and copper mineralization (+4% localized copper intersection in F72), adds significant substance to IP analysis particularly given existing geological data available at Bronze Fox, which is one of the most advance copper exploration projects in Mongolia.

OT style mineralization generally features relatively narrow (comparing with North and South American porphyries), long strike orebodies, and good extension to depth. As such, the Search IP system, utilized in the 2013 IP survey, which has penetrated to over 800m to 1000m, was selected as the optimal tool to assist locating the mineralization or alteration zone with disseminated sulfides (which is normal for porphyry mineralization) with good extension to depth which may indicate disseminated pyrite/sulfides channels, and support the possibility of ore mineralization based on the comparison of previous drilling results and the distribution of the IP chargeability anomalies. It is thought that those mineralization or alteration zones with good extension to depth have a better chance to host higher-grade mineralization, and economic orebodies.

At Bronze Fox, the 2013 IP analysis illustrates that prior drilling failed to adequately test most large chargeability high anomalies with previous encountered mineralization coincident with lower priority IP chargeability zones. Prior to the 2013 programme earlier geophysics could not provide an adequate guide for either depth extension potential of identified mineralized zones nor for targets below 400m below surface, with drilling being largely lead from encouraging mineralization encountered in previous core. For example the aforementioned holes, F62 and F72, illustrate the grade of CuEq and IP chargeability co-relationship, which support that high chargeability is coincident with sulfides of mineralization zones. The new IP results coupled with the latest alteration and veining studies have “explained” previous results, particularly the extensive 0.20 to +0.30% copper intersections to date, and lead to a reinterpretation and refinement of targets. In F62, over 800m graded at least 0.4% CuEq with subsequent IP analysis indicating the hole only interested the periphery of a relatively weak anomaly target (noting higher grades, including 37m @ +1%CuEq, were coincident with being within less than 500m from the interpreted IP anomaly zone) and subsequent alteration and veining studies indicate a less prospective portion of the interpreted porphyry system. The application of the 2013 Search IP programme, coupled with existing geology and geophysics, and independent analysis undertaken by Professor Tony Crawford and Plus Minerals (Imants Kavalieris) has advanced and refined target generation.

A number of analogies between the current stage of exploration and results at Bronze Fox and Oyu Tolgoi pre “discovery hole” have emerged after our 2013 field season, including geophysical anomalies remaining largely untested with favourable mineralization coincident nearer surface and lower priority IP targets. At Oyu Tolgoi, previous BHP and Ivanhoe drilling failed to reach the geophysical targets, with a change in exploration approach to test the geophysical and hypogene potential resulting in OTD 150, between previous shallow holes (BHP 9 and BHP 10), being the first ‘deep’ hole and credited as the “discovery hole”.

At Bronze Fox nine drilling target zones have been identified following the latest IP survey results being integrated with geology, soil geochemistry, rock chip assay result, ground magnetic survey and historical drilling results. IP survey results illustrate multiple significant strike (+1-2km) chargeability high anomalies with good extension to depth that may indicate disseminated pyrite/sulfides channels.

Two targets of particular note are:

  • Sophie North – a classical geophysical circular feature ~2km x 3km from an estimated ~300-500m depth to +900m. Previous drilling failed to enter IP target zones but returned anomalous copper and gold mineralisation (holes lost in an alteration zone).
  • Eastern West Kasulu/Leca Pass – Numerous holes close to IP targets have returned favourable grades but have failed to test the target zone. Multiple specific +1-1.5km anomalies targeted for potential drilling with regional scout holes and geology providing favourable results.

Successful “proof of concept” activities at the identified targets, including Sophie North and Eastern West Kasulu/Leca Pass, with economic grade (or high grade) intersections, could support a significant copper ore resource. Collectively there is large-scale copper-gold resource potential which is one of the underlying attractions of Bronze Fox. Previous phases of exploration have been favourable, refined and de-risked target generation, and while there is no certainty of exploration success, numerous drill ready targets have been defined, with few other activities that could meaningfully further de-risk these targets (ex-Happy Geo, discussed further below) based on previous experience at Bronze Fox and other porphyry exploration projects.

Happy Geo prospect

Following the very high and large chargeability anomalies identified by the Search IP surveyed in 2013 and 3D IP undertaken in 2012, a further 68 rock samples were collected in late 2013 from various alteration zones focused around the Happy Geo prospect. This region is a relatively early stage exploration area, activities really only commenced in 2013. Favourable soil and rock chip samples, with good gold anomalies and outcrop, were returned during the 2012 and 2103 field seasons. Plus Minerals’ short wave infra-red (SWIR) spectrometer analysis of the 68 recent samples confirmed zones of argillic, sericitic and and silicification alteration with pyrite coincident with the IP chargeability anomalies. The SWIR analysis indicates alteration maybe related to an underlying porphyry system but further analysis is planned and required to confirm this.

Further integration of data and analysis on this area is ongoing and while early stage, and very different to the more advanced northern targets, it could indicated some additional resource potential besides the known copper potential areas in Sophie North, West Kasulu, Leca Pass etc. Two zones of outcrop, both with at least a 1-1.5km strike, have been identified at Happy Geo with rock chip samples of up to 91g/t gold.

For further details please refer to our recently updated corporate presentation:

http://kincoracopper.com/investors/corporate-presentation


Geophysical Survey at Las Morras Project (Spain)

Posted by on Friday, 20 December, 2013

Emerita Gold Corp.  announces the completion of geophysical exploration programs at its 100% owned Las Morras Property in the Extremadura Region of western Spain. The geophysical surveys consisted of Very Low Frequency (VLF), Induced Polarization (IP) and Electrical Resistivity Tomagraphy (ERT) surveys over the Central and Northwest target areas. The surveys identified several anomalies that are interpreted to represent shear zone structures coincident with the previously identified gold geochemical anomalies (see news releases dated August 29 and April 8, 2013). These interpreted structures will be evaluated as potential bedrock sources for the gold identified in the soils over the geophysical features by trenching and, if appropriate, drilling.

Background

As previously reported, geochemical surveys have identified two areas with strong gold anomalies referred to as the Central and the Northwestern areas . In the Central area two gold geochemical anomalies have been identified, both approximately 300 meters wide and extending in an east-west direction 500 meters and 800 meters, respectively. These anomalies extend beyond the survey limits to the east and also to the west (see press release dated April 8, 2013).

The Northwestern area is characterized by a single gold anomaly (Figure 3) that extends approximately 700 meters long and over 100 meters wide in an east-west direction. This anomaly also extends beyond the limits of the survey area to the west and to the east (see press release dated August 29, 2013).

Geological mapping indicates that these gold anomalies are underlain by zones of strong shearing in bedrock. The shear zones are developed within the Precambrian Schist-Greywacke Complex (SGC) and are characterized by a zone of high strain and local quartz-gold veining, with predominantly a east-west direction. Outcrop is limited and the geophysical surveys are designed to improve the targeting of the follow up program.

Geophysical Surveys

Geophysical surveys (VLF, IP and ERT) were carried out during October and November 2013, with interpretation completed in mid December, to identify geophysical anomalies representative of bedrock structures potentially related to mineral occurrences. The surveying was performed in both, the Northwestern area and the Central area.

Survey Results

The VLF survey consisted of 27 linear kilometres in both the Northwestern and Central areas, where measurements were performed every 10 meters. As shown in Figure 4, in the Northwestern area 8.9 linear kilometres were surveyed on 14 lines oriented north-south, with lines ranging from 350 to 1,100 meters each. In the Central area 18.1 linear kilometres were surveyed on 20 lines with north-south orientation and lines ranging from 550 to 1,100 meters each (Figure 6). The spacing between lines was determined according to the results of the geochemical campaign (see press release dated August 29, 2013), ranging from 50 to 100 meters.

The IP and ERT surveys consisted of 10.4 linear kilometres in both the Northwestern and Central areas. Both the IP and ERT surveys were measured simultaneously with the same device. The spacing between electrodes was 10 meters, which allows detection of features up to 120 meters depth. Figure 5 shows the distribution of the 11 lines of the IP and ERT surveys for the Central area, where 6.93 linear kilometres were surveyed. All lines were 630 meters in length oriented in north-south direction excepting one line with an east-northeast orientation. In the Northwestern area 5 lines were measured by IP and ERT, for 3.47 linear kilometres. The lines varied in length, from 630 to 950 meters. The spacing between lines was determined based on the results of the geochemical campaign (see press release dated August 29, 2013), ranging from 100 to 450 meters.

VLF and ERT-IP images/profiles clearly indicate several subvertical anomalous geophysical zones, characterized by resistivity-chargeability highs (i.e. 300-5,000 Ωm, and >150 ms) (Figure 6).

Geophysical Survey Interpretation

The VLF survey showed conductive anomalies in both the Northwestern and Central areas which have a predominantly east-west orientation. However, some alignments of northwest- southeast direction have also been identified. These VLF anomalies correspond to fault orientations seen in mapping and with the geochemical data.

The IP and ERT surveys allowed the identification of bodies and zones with high chargeability values in the case of IP and high/low resistivity values in the case of ERT. The survey identified bodies with a broad east-west orientation in both the Northwestern and Central areas, which are coincident with the VLF results.

The geophysical data, together with geologic information and geochemical data from the two target areas, identified features having characteristics that would be expected from a shear zone system. This shear zone system is interpreted to represent a possible source of the gold found in the area and will be the focus for follow up trenching and, if merited, drilling. The geophysical anomalies are coincident with geochemical anomalies found in the central and northwest areas. Furthermore, both the geochemical and geophysical anomalies are open along their strike, particularly to the east. The extent of the anomalous body in the Central target area, based on the geochemical and geophysical results, is 1,200 meters long, 90 meters wide with an extension to a depth of at least 120 meters based on the IP/IRT, corresponding to the bottom of the geophysical profiles. In the Northwestern target area the anomalous body is 600 meters long, 80 meters wide and continues to a depth of 100 meters, corresponding to the bottom of the geophysical profiles.

The identification of geophysical anomalous areas (i.e., faults zones and bodies of high resistivity and high chargeability) represent the prospective targets for trenching and drilling.

Survey Methods

Both electromagnetic (EM) and DC-geoelectrical methods were selected to perform the survey. These methods are well-known to be suitable for cost-effectively identifying geophysical characteristics for geological features such as shear zones with low sulphide mineral concentrations. The selected techniques were Very Low Frequency (VLF) (Klein and Lajoie, 1980), Electrical Resistivity Imaging (ERI) (Griffiths and Barker, 1993) and Induced Polarization (IP) (Keller and Frischknecht, 1966).

The VLF measuring was carried out with an ENVI system (Scintrex) equipped with a VLF sensor module. The VLF sensor consists of three orthogonal coils designed to make it an omni- directional system.

The acquiring system for the ERT-IP was a Terrameter LS resistivimeter (ABEM SE) with 12 channels and 250 W Tx ouput. The array was implemented by 4 multicore reels of 16 take-outs each, steel electrodes and connections, up to 64 electrode configuration system.

Details and Figures


Geophysical Survey Defines Large Scale Targets at Suriloma Gold-Silver Project, Peru

Posted by on Monday, 28 October, 2013

Darwin Resources Corp. has announced that it has commenced a ground geophysical induced polarization (“IP”) survey at its Suriloma project in the Department of La Libertad, Peru. Suriloma is located in a pedigreed epithermal gold belt, just 30km from Barrick’s Lagunas Norte (14 Moz contained gold) and 50km from Rio Alto’s La Arena mine (2.3 Moz gold oxide). Now the company reports results from a dipole-dipole induced polarization (“IP”) geophysical survey at the project in Peru.

Key points:

   -- The survey highlighted a number of strong geophysical anomalies that
      support the interpretation that recent diamond drilling intersected the
      upper, low-temperature part of an epithermal vein system and point toward
      a number of large-scale untested gold and copper targets at depth; 

   -- At the La Puerta area, an IP anomaly has been defined over 1300 metres by
      200 metres, extending from a depth of 200 metres to the limit of the
      survey depth at 300 metres depth. The anomaly is interpreted to be the
      disseminated sulphidic core to the gold mineralization observed in
      shallow drilling; 

   -- At the Edelmira area located 4 kilometres to the west of La Puerta, an IP
      anomaly has been mapped over an area of 400 by 300 metres open to the
      west. The anomaly is located at 250 metres depth and is interpreted to
      reflect the upper parts of a buried porphyry copper system.

Dr Graham Carman, President and CEO, states: “The IP survey has confirmed the presence of large-scale chargeable targets that lie immediately beneath the gold-bearing structures drilled 2 months ago. The survey has significantly increased the prospectivity of the area and we look forward to drill testing these exciting epithermal gold and porphyry copper targets.”

In total, 19.1 line-kilometres of dipole-dipole IP were surveyed on two separate grids, including at the La Puerta area where the Company previously reported encouraging gold intersections in several shallow drill holes, including 13.1 metres @ 1.4 g/t gold from 50.8 metres from hole SU-003 and 14.7 metres @ 0.9 g/t gold from 123.2 metres in hole SU-011 (see Darwin Press Release August 19 2013). Modelling of the IP survey at La Puerta shows a steeply north-dipping tabular zone of conductive rocks up to 200 metres wide, which is interpreted to be the down-dip continuation of clay altered volcanic rocks associated with outcropping epithermal veins. At the base of the conductive zone a chargeability anomaly has been mapped over 1300 metres by 200 metres, extending from a depth of 200 metres to the limit of the IP model at 300 metres depth from surface (Figures 2 and 3). It is interpreted that the chargeability anomaly reflects sulphide mineralization at or near the contact with quartzite metasediments lying beneath the younger andesite volcanics. This is a high-priority drill target. The quartzite sediments are the preferred host rocks at large gold deposits elsewhere in the La Libertad region of Peru. Earlier drilling at La Puerta tested part of the epithermal vein system down to an average depth of only 65 metres and did not drill to sufficient depth to intersect the chargeable anomaly identified in the IP survey.

An extension of the IP survey 4 kilometres to the west at the Edelmira area defined a chargeability anomaly at a depth of 250 metres, which has dimensions of 400 by 300 metres and remains open to the west. This chargeability anomaly lies immediately beneath outcrops of copper-silver-gold bearing veins with quartz-sericite alteration, and is interpreted to reflect the upper parts of a buried porphyry copper system based on the Company’s experience elsewhere in Peru.


Ground Geophysical Survey at Suriloma, Peru

Posted by on Wednesday, 16 October, 2013

Darwin Resources Corp. announces that it has commenced a ground geophysical induced polarization (“IP”) survey at its Suriloma project in the Department of La Libertad, Peru. Suriloma is located in a pedigreed epithermal gold belt, just 30km from Barrick’s Lagunas Norte (14 Moz contained gold) and 50km from Rio Alto’s La Arena mine (2.3 Moz gold oxide).

At Suriloma, Darwin has discovered surface gold and silver mineralization at 6 prospect areas over a strike length of 5 kilometres. Only one of these areas, La Puerta, has been partially drill tested by drilling to a maximum depth of 100 metres in August 2013. Encouraging gold was intersected in several drill holes with gold grades increasing with depth at La Puerta (see Darwin Press Release August 19 2013).

Gold mineralization occurs together with disseminated sulphides, which should be detectable in the sub-surface using IP geophysics. Two separate areas will be surveyed with IP, which will help identify new targets for future drill testing from the surface to a depth of 300 metres. Gold targets at the La Puerta – Inmaculada – Guadalupe areas will be covered by one survey, while a copper – silver target will be tested by a second survey area at Edelmira.

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Dr Graham Carman, the Company’s President and CEO, states: “Suriloma is a large project with multiple mineralized structures identified through mapping, surface sampling and early stage drilling. The project warrants the momentum of further exploration and we look forward to receiving the geophysical data which will aid in refining and extending targets down to a maximum depth of 300 metres for our next drill program. We expect the IP program to be completed before the end of October.”


COMPLETION FIELD PROGRAM ON CAYENNE-CHILI (ONTARIO) WITH IP

Posted by on Tuesday, 8 October, 2013

Red Pine Exploration Inc.  has recently completed an IP survey and second phase bedrock sampling program over its Cayenne-Chili Property. The Cayenne-Chili Property consists of 24 contiguous mining claims and patents totalling 3900 hectares.  The claims sit in a region interpreted as the western extension of both the Larder-Cadillac deformation zone and the second a western extension from the Porcupine-Destor deformation zone to the north.

New VMS Occurrences Discovered

The initial prospecting, mapping and channel sampling program completed in July, 2013 across the property returned numerous, significant polymetallic assay values that are characteristic of a volcanogenic massive sulphide (VMS) mineralized system.  The program identified an extensive alteration system with sodium depletion and chlorite enrichment, a geochemical assemblage characteristic of a VMS system.  The second round of bedrock sampling was designed to augment the newly discovered anomalous zones.

‘New Zone C’ reported highly anomalous values of 24.7% zinc, 15.6% lead and 1.1% copper. These values are similar to those reported on the historical exploration on the nearby ‘Jefferson Deposit’[1], with the exception of the highly anomalous copper (Cu) values. The historical (1950’s) results intersected 4.43% Zn and 1.25% Pb over 22.9m and 9.1% Zn and 11.5% Pb over 6.9m, but no appreciable copper. In the 1980’s work by Falconbridge encountered 2.7% Zn over 9.12m and 1.6% Zn over 13.83m, with another hole reporting 1.7% Zn over 17.2m. The newly identified copper mineralization leads Company geoscientists to believe that a ‘heat vector’ towards the source of the mineralization can now be established.

Quentin Yarie, president and COO commented:” It is promising to find high grade mineralization beyond the historic showings which complements the current geophysical interpretation.  The alteration and VMS mineralization observed at surface is much more extensive than we had believed based on our review of the previous exploration programs.  We also have a high priority geophysical target immediately north of the sodium (Na) depleted footwall materials – a setting similar to Sturgeon Lake”.


IP&VLF surveys for gold in Central Yukon

Posted by on Tuesday, 24 September, 2013
BCGold Corp. announces that exploration work has commenced on its 100%-owned WS Property  in central Yukon. The Property is situated adjacent and along strike with Copper North Mining Corp.’s Carmacks Copper Project (the “Carmacks Project”), which has Proven and Probable Reserves of 11.5 million tonnes grading 0.98% total copper, 0.44 g/t gold and 4.3 g/t silver and is in the final stages of mine permitting.
The WS exploration program, partly funded by a $25,000 Yukon Mining Incentives Program (YMIP) grant, is designed to enhance current drill targets on the Property, which are interpreted to be the strike extents of Zones 12 and 14 of the Carmacks Project. Previous drill testing by BCGold intersected two near-surface copper sulphide horizons averaging 0.17% Cu over 63.1 metres (see January 13, 2009 news release). The 2013 exploration program will consist of the following:
  • detailed high-resolution IP geophysics near the claim boundary of the Carmacks Project and the Property;
  • a limited program of VLF geophysics and biogeochemical sampling, as alternative techniques to delineate further the strike extent of Zones 12, 14 and the ICE showing;
  • geological mapping and prospecting over a 2.5 km2 prospective area with IP and magnetic signatures and elevated copper-in-soil anomalies that are suggestive of near-surface, Minto-style mineralization.
BCGold’s 2013 exploration program will take approximately four weeks to complete. The IP geophysics program is being conducted by GroundTruth Exploration based in Dawson, Yukon. The concurrent VLF geophysics and biochemical sampling programs are being conducted by Dumas Consulting and Core Assets Consulting, both independent contractors to the Company. Biogeochemical samples will be submitted to Activation Laboratories Ltd. in Kamloops, British Columbia, an ISO 9001:2008 accredited laboratory.

The Targets

All of the Minto/Carmacks Copper-Gold properties were staked over areas with geological, geochemical and geophysical characteristics known to reflect near surface, high-grade, structurally controlled copper-gold mineralization in the region, such as the Minto and Carmacks copper-gold deposits.

BCGold Corp. is focused on the discovery of stand-alone and/or satellite copper-gold deposits, the latter of which could be used to supplement mill feed for the Minto and future Carmacks mining operations.

Nearby Deposits

Minto

Capstone Mining Corp.’s Minto Mine is a 3,600 tonne per day, conventional crush and flotation, open pit mining operation that produces copper concentrates with significant gold and silver credits. It is one of the highest grade open pit copper-gold mines in the world. Capstone continues to develop its resources and find significant new deposits in the area.

Carmacks

Copper North Mining Corp.’s Carmacks Copper Project has an NI 43-101 compliant Proven and Probable Reserve estimate of 10.6 million tonnes at 1.044% total copper, 0.484 g/t gold and 4.62 g/t silver. Copper North plans to construct an open pit mine with an acid heap leach and solvent extraction/electrowinning (SX/EW) process facility and is in the process of obtaining the final permitting requirement for mine operations, a Water Use License.


Results from Spring Exploration on Ring of Fire

Posted by on Friday, 9 August, 2013

MacDonald Mines Exploration has received the results from its Spring 2013 drill program targeting volcanogenic massive sulfides (“VMS”) in the Ring of Fire (“ROF”).

The history of geophysical investigation of the property can be found here.

Two drill targets were tested during the program over the Butler 3 and Butler 4 targets respectively. The Butler 3 drilling did not hit appreciable copper or zinc mineralization, but did intersect hydrothermally altered felsic and intermediate volcanic rocks that are indicative that the drill holes are proximal to a large VMS body. The Butler 4 drilling intersected copper and zinc mineralization that Company geoscientists believe to be associated with stratabound mineralization that extends to depth.

“MacDonald is keenly aware that the market, especially today, is only motivated by huge success. James Bay exploration is tough, it is a wetland with little outcrop. Consequently we must utilize drill results for ongoing quantification that further exploration is warranted. The Butler 3 and Butler 4 targets have all the necessary components for discovery:

  • A large heat source (ultramafics, proven komatiates)
  • Laterally extensive alteration (a large system)
  • Known mineralization; zinc, copper, silver and lead
  • Secondary mineralization typically associated with larger VMS systems – tin, enrichment of P2O5 “icelandite”
  • Geophysical signatures (EM, IP, magnetics, and gravity)

We believe we are now moving to the final stages of our exploration efforts. We have quantified geochemical, geophysical and geological (structural) targets and are working on prioritizing these for the next stage of exploration. We expect to be drilling in the fall of 2013 after a full compilation of the data.” – Kirk McKinnon, President & CEO

Two drill holes (BP13-CU19 and CU20), were drilled on the Butler 3 geochemical/geophysical anomaly. No appreciable copper or zinc mineralization was intersected within these drill holes, however the lithologies intersected sodium depleted intermediate and felsic volcanic rocks. This geochemical signature represents a classic alteration vector for VMS mineralization, and leads Company geoscientists to the conclusion that VMS mineralization is to the south-west.

The targeting of the south-west likely represents the extension of the mineralized zone intersecting in drill hole BP12-Cu14. It appears that BP12-Cu19 and BP12-Cu20 are lateral to the mineralized zone.

  • Hole BP12-Cu14 intersected 41.5m of 0.4% Cu, 3.26% Zn and 6g/t Ag
    • Including:
    • 12.5m of 8.54% Zn and 6.24 g/t Ag
    • 5.0m of 1.18% Cu, 3.86% Zn and 14.48 g/t Ag

The target area to the south-west is corroborated by a coincident EM and IP anomaly. Before drilling this target however, the Company intends to conduct a robust structural analysis of the existing drill holes under the direction of Rogerio Noal Monteiro, Ph. D. (Vektore Exploration and Consulting). This data will be used in conjunction with the geochemical and geophysical vector analysis to guide drill targeting.

Drill holes BP13-CU21 and CU22 were drilled on the Butler 4 geophysical anomaly (with coincident IP and EM geophysical anomalies). BP13-CU22 intersected 7.50% zinc over a 3 metre interval, and 0.23% copper over 2 metres. Drill hole BP13-CU21 intersected 0.15% copper over a 12 metre interval. These drill intersections are significant in that they pierced the upper edge of a large sub-vertical electromagnetic plate that was postulated to be associated with VMS mineralization. Now that the Company has verified that this geophysical target is associated with copper and zinc mineralization, a detailed analysis of the structural geology will be undertaken on the target. This information, in conjunction with geochemical and geophysical analysis will be used to develop discrete drill targets.