Posts Tagged magnetic

Magnetic Survey Identifies extra length of Potential Strike in Arizona

Posted by on Friday, 11 April, 2014
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 Patriot Gold Corp.  a developing gold and silver exploration and production company, announces the results of an airborne magnetic survey of its Moss Gold-Silver project located in the historic and active Oatman Mining District near Bullhead City, Arizona. Results of the survey included use of magnetic, field mapping and historic mineral and workings data.

  • The main Moss resource and hosting structure lies along a well-defined magnetic high and includes three kilometers of unexplored potential on one structure.
  • Nine magnetic linear anomalies associated with know mineral occurrences and historic workings were found as part of the Moss structure, indicating potential for hosting new discoveries along these structures.
  • One structure includes nearly six kilometers of a mapped extension of the Gold Road deposit which previously produced nearly 500,000 ounces at 0.32 opt gold.
  • The implications of the new data indicate that the exploration potential of the Moss site is very good and that there is the likelihood of further discoveries on the Moss property.
  • Following the interpreted results of the survey, the Company’s partner Northern Vertex Mining Corp., is currently designing an exploration program to assess the potential of the additional structures identified that would run concurrently with Phase II – Operations Phase of the Moss project plan.

The survey found a total of 21 kilometers of potential strike length along the entire Moss Mine property. In addition, several other linear magnetic lows and highs were found that would require ground work to determine if they are mineralized.

In June 2013, a preliminary economic assessment of the Moss Mine Project, which did not include the current survey results, assessed the measured and indicated gold equivalency of the site at 654,000 ounces with an inferred resource estimate of 82,000 ounces.

“While the results of the survey are preliminary at this stage, this type of mapping has been the foundation for many successful early stage exploration programs,” said Bob Coale, CEO of Patriot Gold. “Considering that the historic production in the Oatman District previously exceeded 2 million ounces of gold production, we believe the survey results highlight the Moss Gold-Silver project’s high potential for additional gold discoveries which could further increase the value of this property.”

Geology of the Moss Mine Property

The project area is underlain by Tertiary quartz monzonite (a coarsely crystalline rock composed primarily of quartz, plagioclase and orthoclase) intruding Tertiary age volcanics. Precambrian basement rocks underlie the volcanics. The veins consist of quartz-calcite and lesser adularia. The Moss vein system is up to 45 feet thick and can be traced on surface for over a mile. The hanging wall of the main vein commonly has several tens of feet of stockwork veining. Dipping 40-60 degrees to the south from a high ridge, the quartz-calcite veins and stockworks are being drilled as a bulk minable gold target. Based on the results to date, Patriot believes the Moss Mine project has the potential for an economic resource of leachable gold and silver in the order of one million ounces of gold equivalent.


Integrated airborne geophysics and geologic data interpretation for new Eskay-Creek style deposits

Posted by on Wednesday, 9 April, 2014

Dolly Varden Silver Corporation announces that through recent geoscience modeling and ongoing interpretation, the Company has focused its primary advanced exploration target areas on three corridors within the Dolly Varden property. Work is now being done to prioritize the most prospective drill-ready targets within these corridors. The corridors and targets were chosen for their potential to best expand areas of known high-grade silver mineralization and to identify new Eskay-Creek style precious metals deposits.

 

 The three targeted corridors are the 1) Torbrit-Red Point Corridor – following known silver mineralization underneath Red Point, an Eskay-Creek style target; 2) Musketeer Corridor – which runs along the east side of the Kitsault river with numerous Ag-rich epithermal vein-type showings with strong potassic radiometric signatures; and 3) Wolf-Surprise Corridor where an Eskay-Creek style host formation containing silver-rich VMS mineralization was identified by the Company’s 2011 drill program.

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Through recent modeling and ongoing interpretation, the Company has now moved from kilometer scale targeting to meter scale targeting within these defined corridors. The Company’s technical team is working to delineate specific drill ready targets within these corridors. An aggressive 40 to 50 hole (13,500 meter drill program) is being finalized, subject to financing.
The combination of airborne MAG, VTEM, ZTEM radiometric, and geochemical data, along with geological and structural mapping, was used to define priority target zones. These helped define steep linear features, syngenetic faults, lithologic contacts related to basin formation, and key fluid controlling structures. In addition, key rock units, contact zones and alteration zones most likely to be associated with mineralization, were identified.
This compilation has demonstrated that the known deposits, showings, and related alteration zones are all located within a rift setting. The key rock units that infill the rift have also been identified, and these represent viable targets for Eskay Creek style VMS mineralization. Drilling will be conducted within corridors where mineralized occurrences and coincident alteration haloes point to extensive hydrothermal fluid flow. The key target areas for 2014 drilling include syngenetic VMS-style mineralization and associated feeder structures.

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.


The renewed Interest in Pecors Magnetic Anomaly-Serpent River Property Near Elliot Lake, Ontario

Posted by on Friday, 21 February, 2014

International Montoro Resources Inc. – The Serpent River Property, Elliot Lake, Ontario claims consist of 10 mining claims (115 units) covering approximately 1,840 hectares located in Gaiashk & Joubin Townships. Recent renewed interest has been shown in the 3 upper northwest claims known as the Pecors Anomaly. Click following for maps/regional geophysical overview http://ow.ly/tNTbz.

Montoro congratulates Kelly Strong, V.P. of Ontario and UK Operations -Vale, in the recent startup of the Totten Mine (Totten lies 40 km to the west of Sudbury and approx. 50 km from Pecors). This is Vale’s sixth operating mine in the Sudbury Basin. A polymetallic orebody with good nickel and copper grades as well as precious metals. Click following for the complete story: http://ow.ly/tLq2T. (See page 1 & 19-34 re the Totten Mine and page 15 re the KGHM Victoria Mine Projects)

The Uranium and Rare Earths discovered in the southwest portion at Serpent River may prove to be a sideshow to another deposit type. In a 2009 summary of the Ontario Geological Survey field work, a strong geophysical anomaly on the claims that was previously thought to be caused by an iron formation was reexamined. The new interpretation on the Pecors anomaly concludes it may be the result of contact style nickel-copper-PGE mineralization similar to that found to the east at Sudbury. Sediment sampling from Pecors Lake has shown high levels of nickel and chromium, lending further weight to this analysis. The total field magnetic anomaly strikes northwesterly and is about 15 km long and about 4 km wide.

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Exploration & Development of the Pecors Anomaly:

  • Int. Montoro, Pele Mtn. & Verbina Resources completed a combined VTEM survey in January 2008. An operational report for this survey was written by the contractor Geotech Ltd. in February 2008, Project 7112.
  • 2009 Ontario Geological Survey field work completed- Open File Report 6240; Project Unit 09-004. Compilation Mapping, Pecors-Whiskey Lake Area, Southern and Superior Provinces
  • February 23, 2010 brief prepared by G. Campbell, MSc. – ‘The Pecors Magnetic Anomaly located under Huronian Cover – A Possible Cu-Ni-PGE Target at the Archean-Proterozoic Boundary, Elliot Lake Area
  • May 5, 2010; Int. Montoro commissioned a report on the southern claims group of the Serpent River Property from L.E. Reed Geophysical Consultant Inc.
  • May 20, 2011; Int. Montoro initiates a search for and locates 4 historic boreholes PW #116, 117, 121 & 122 drilled by Rio Algom in 1959 on the eastern side of Pecors Lake. Holes PW 121 & 122 drilled along the south and southwestern edge of the Pecors Anomaly, penetrated the Huronian sediments and encountered underlying basement rocks at depths of 2002 feet (610 meters) and 1477 feet (450 meters) respectively. Information from the drill holes provides some corroboration of the depths from the 3D model as reported in the July 6, 2011 report following.
  • July 6, 2011; Int. Montoro commissions a report ‘Response of the Pecors Magnetic Anomaly‘ from L.E. Reed (“Reed”) Geophysical Consultant Inc. Reed ran the anomaly through a 3 dimensional inversion program (UBC, Mag3D) to develop an understanding of the three-dimensional shape and distribution of the source body for this anomaly. Measurements through a section in the center of the anomaly show a depth of 300 to 400 meters to the top and as much as 1700 meters from surface to the bottom of the magnetic source body. It appears as a broad sill, possibly an intrusion. The maximum dimensions of the entire inversion block are estimated at 7.8 km EW x 3.45 km NS and 2.025 km from surface. Select portions of the Reed Interpretation report are posted on the updated Serpent River project page on the Company website at www.MontoroResources.com
  • February 2014; Int. Montoro is actively engaging stakeholders in the Sault St. Marie & Sudbury Mining Districts to proactively move forward the exploration of the Pecors Magnetic Anomaly.

Other:

Neighboring explorer, Pele Mountain Resources (TSX VENTURE:GEM), has provided the results of an updated economic review of its Eco Ridge Mine rare earth and uranium project in Elliot Lake, Ontario. In its news release dated September 12, 2013, Pele Mountain reports the economic review concludes that the recent increase in mineral resources extends mine life and improves project economics. While this improvement is offset by a reduction in rare earth price forecasts, the net result demonstrates that Eco Ridge economics remain positive.

Int. Montoro is also seeking interested parties in continuing the development of the Serpent River southern portion of its rare earth and uranium property adjoining Pele Mountain’s claims east of Eco Ridge.


Geophysical exploration program in Nicaragua

Posted by on Tuesday, 18 February, 2014

Caza Gold Corp. announces that the Company has initiated the 2014 exploration program at the Los Andes and Pochote properties in Nicaragua. The Company is planning a large airborne geophysical survey and a drilling program which will test 2 of the highest priority gold targets.

Plans are underway to complete a geophysical survey along a 12 kilometer long trend of continuous alteration within the Los Andes and Pochote claims, followed by a drilling program to test two gold targets not previously drill tested during the 2012 Pedregal program. The upcoming drilling will test the Quisaltepe and San Francisco gold zones. Access agreements have been obtained for the San Francisco area and drill access road construction is underway. Negotiations for access in the Quisaltepe area are being finalized. The drilling program is expected to begin, pending contractor scheduling, by April and is planned to complete approximately 10 to 15 holes each 200 to 250 meters deep. A dedicated budget of approximately CDN$1.3 million has been set aside from the proceeds of the December 2013 CDN$2.5 million financing to execute the exploration program.

The Company has contracted Aeroquest Airborne to complete the helicopter based geophysical survey which will cover approximately 36 square kilometers over the Pedregal, Quisaltepe and San Francisco gold targets acquiring versatile time domain electromagnetic (VTEM) and magnetic data along approximately 530 line kilometers at 100 meter line spacing. The survey is scheduled to begin in March pending the importation of the survey equipment and final scheduling of personnel and equipment. Geophysical survey results in conjunction with geochemical results, structural and alteration mapping will further define the drilling locations.

The VTEM and magnetic data are targeting the conductive massive sulfide horizons and the resistive silicified zones associated with large faults and possible areas of gold mineralization. The magnetic portion of the survey will provide additional information identifying the fault zones and deeper porphyry style mineralization and intrusive bodies. The survey will cover the Pedregal area, drilled in 2012, which intersected thick horizons of sulfide mineralization and strongly silicified zones with elevated but sub- economic gold concentrations (refer to Nov. 29, 2012 news release for details) and along the 10 kilometer trend to the San Francisco target at the south end of the zone.

Los Andes High Sulfidation Gold Property, Nicaragua

The Los Andes Property is located approximately 1 hour east of Managua on Highway 7 with excellent access. The property covers approximately 6,575 hectares and is strategically located within the Central Nicaragua Gold Belt between the El Limon and La Libertad Mines of B2 Gold.

The Los Andes property is a high-sulfidation style of gold mineralization.  High-sulfidation gold systems host some of the largest gold deposits in the world with examples such as Yanacocha and Pierina in Peru.  Favorable alteration and mineralization has been traced along the regional northeast trending Los Andes structure for at least 11 km on the Los Andes property.  The extensive alteration system is exposed on the surface and consists of very strong silicification associated with zoned alteration from higher temperature advanced argillic zones surrounded by successively lower temperature argillic, and propyllitic alteration.  The alteration is associated with anomalous values of gold, silver, and highly anomalous levels of indicator metals such as bismuth, tellurium, selenium, arsenic, antimony, and mercury.


The first airborne EM survey over Tireo gold belt in Dominican Republic

Posted by on Friday, 14 February, 2014

GoldQuest Mining Corp. has commenced flying a helicopter borne ZTEM geophysical survey covering its’ 100% owned Tireo Concessions. The geophysical survey is the first Electro Magnetic survey ever flown over this belt, and will include a high-sensitivity cesium vapour magnetometer for mapping geologic structure and lithology.

 ”Results from this survey will complement the PEA underway at our Romero discovery, providing significant newsflow over the next year,” commented Julio Espaillat, GoldQuest’s CEO, “ZTEM has been selected in light of our knowledge gained at the Romero discoveries. This allows us to quickly evaluate the complete area to depths beyond 1 kilometer. We are confident that if there are other similar hydro thermal systems in our large Tireo concession areas, we will identify them with this state-of-the-art system.”

The map link to: http://goldquestcorp.com/images/press_release/GQC_TireoBeltExplorationMap.jpg

Shows the extent of the ZTEM survey, surrounding our Romero discovery where the maiden technical report describing a multi million ounce gold equivalent resource was filed on December 17, 2013.

Geotech Limited of Canada is flying the ZTEM and magnetometry survey over all of GoldQuest’s concessions in the Tireo Formation, totaling approximately 3,000 line kilometers, at a combination of 100 and 200 meters line spacing. The survey will improve the understanding of the geology and mineral potential along the Tireo trend, and will provide insight into the conductivity, magnetism, alteration and structure of the belt, in light of the Romero discoveries, which will be covered as part of the survey. The data will complement the induced polarization, ground magnetic, mapping and sampling programs which has generally been confined to an area within 5 kilometers of Romero, leaving the majority of the 60 kilometer strike length of the Tireo Concessions unexamined to date. The survey covers areas that have been granted to GoldQuest, and those areas under application.

The Company’s 2014 approved budget for the Tireo Project covers the exploration of the Tireo Formation in the Dominican Republic, and includes this airborne survey, ground follow up and drilling of any anomalies in 2014.

 


Planned airborne geophysical survey looking for an economic graphite deposit at Blackflake property

Posted by on Monday, 10 February, 2014

Xmet Inc. announces that it has engaged Aeroquest International to complete a new round of Versatile Time Domain Electromagnetic (“VTEM”) and Magnetic Gradiometer Survey on its newly acquired 20,000 acres of 100% owned claims which expanded Blackflake’s total area to 29,400 acres. The airborne survey will begin in the next few days.

“This will be our third round of EM aerial surveys and with the exploration success Xmet achieved with its first two EM surveys, we are excited about the potential for this next round of VTEM,” said Xmet’s Chairman and CEO Alexander Stewart.

He continued by saying, “Our primary objective remains to drill test our prime anomaly, disclosed in our news release of December 12, 2013, for which permits for ground geophysics and drilling are expected to be received this month. However this newly acquired land and the further upside potential that the VTEM can deliver is equally exciting.”

Embedded in this news release is a MAP depicting Blackflake’s Eastern Claim Block. As per the map’s legend, the yellow portion within Xmet’s claim block denotes Xmet’s land package prior to January 30th, 2014 News Release and the horizontal grid lines within Xmet’s claim block denotes the 20,000 acres of new claims staked along with the area that will be flown in this round of VTEM.

To view the map accompanying this press release please click on the following link: http://media3.marketwire.com/docs/XME0204.pdf

Bill Yeomans, P. Geo, states, “Given the highly conductive nature of graphite deposits, VTEM is a very effective method for locating potential graphite and massive sulphide type deposits. The new VTEM survey, which will cover approximately 473 line kilometres, is excellent for locating conductive anomalies as well as for identifying lateral and vertical variations in resistivity.”

About Blackflace…


High Resolution Airborne Geophysical Survey in Tanzania

Posted by on Sunday, 19 January, 2014

Geological Survey of Tanzania (GST) and Ministry of Energy and Minerals of Tanzania have organized the Workshop “Launching High Resolution Airborne Geophysical Data at Julius Nyerera Convention Center (17 January, 2014, Dar es Salaam, Tanzania). Around 150 delegates have attended the workshop from government and private sectors.

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Geotech Ltd. and Sander Geophysics have finished the airborne magnetic, gravity, electromagnetic (VTEM), radiometric surveys in 31 districts and presented some results of the surveys.

Permanent Secretary (PS) of Ministry of Energy and Minerals Mr.Eliakim Maswi said – the surveys were carried out under the Sustainable Management of Mineral Resources Project, saying the purpose of the survey was to identify potential zones of mineralization. “The main objective of the project is to improve the socioeconomic impacts of mining for Tanzania and Tanzanians and therefore enhance local and foreign investments”, said PS.

GST Chief Executive Officer , Prof. Abdulkarim Mruma said: “geophysical data acquired through the high resolution airborne geophysical surveys allow fast and accurate delineation of mineralised targets and when augmented with geological and geochemical datasets are highly effective in attracting new exploration ventures.” Prof. Mruma noted that the availability of the modern geo-scientific  data will stimulate investments into mineral and other sectors and will improve the effectiveness of exploration programs.

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Photo: A.Prikhodko


The Results of a Three Methods Airborne Geophysical Survey Over the Kirkham Property in BC

Posted by on Friday, 20 December, 2013

Metallis Resources Inc. announces the receipt of a report summarizing the results of an airborne geophysical survey over its Kirkham Property (the “Property”), situated in the prolific Golden Triangle area of northern British Columbia. The helicopter-borne versatile time domain electromagnetic (VTEM), magnetometer and gamma-ray spectrometry geophysical survey covered 57 km2 of the Property at 250-metre line spacing.

These data indicate a number of anomalous electromagnetic zones (conductors) are present across the survey block. Refer to the attached map for reference. Several of the isolated VTEM anomalies are coincident with conductors that were identified by earlier airborne surveys. In general, electromagnetic (EM) anomalies follow magnetic trends, are commonly associated with local magnetic anomalies and show good correlation with thorium/potassium ratio gamma-ray anomalies.

The isolated anomalies could correspond to the volcanogenic massive sulphide (Eskay Creek -type) or the shear/vein (Snip Mine-type) exploration models. The large anomalies could be related to porphyry copper/gold systems (i.e. Red-Chris, Galore Creek, and Mt. Milligan).

A 2 km diameter area of magnetic high (>100nT) with coincident low resistivity occurs in the north-central part of the survey area. The area’s low resistivity character is interpreted to be caused by alteration and possibly sulphide mineralization. The elevated magnetism is interpreted to be the expression of an intrusive body which could be the source for the mineralization discovered to date. A weak thorium/potassium ratio high coincides with this area consistent with a dioritic composition intrusion. According to apparent resistivity depth imaging over selected lines, the estimated depth to the top of this target is roughly from 50 to 100 meters. This anomaly corresponds to a large gold-in-soil anomaly where numerous mineralized veins were discovered in the 1980s by trenching through the deep overburden. A channel sample of a vein from one of these trenches returned 16.2 g/t (grams per tonne) gold over 0.4m. Another channel sample assayed 1.72 g/t gold over 6m. The whole area of the anomalous mag/EM response is deemed prospective for discovery of new mineralized zones.

One of the major coincident VTEM/magnetic/radiometric anomalies is correlated with the known distribution of the Hawlison monzonite which belongs to a suite of Jurassic alkali feldspar-plagioclase-hornblende-porphyries. Compositional similarities would suggest that the Hawlison monzonite be grouped with the Eskay Porphyry of the Texas Creek Plutonic suite. At the south end of the above mentioned quartz monzonitic intrusive, a zone of increased EM response, again associated with a magnetic low, occurs on the west side of the mapped intrusive, and in the vicinity of mineralized showings. In particular, a strong conductor occurs at the west end of one of the survey lines. A limited amount of drilling and trenching has identified copper and gold mineralization occurring over a 3.5 kilometer-long section of this intrusion. In 2010, Paget discovered a zone of higher grade copper-gold mineralization of up to 1.3 g/t gold and 0.57% copper extending up to 1.5 kilometers south of existing drilling. Fourteen rock chip samples of quartz-sericite-pyrite altered porphyry with quartz-chalcopyrite veins and stockworks averaged 0.4 g/t gold and 0.22% copper, including values up to 1.3 g/t gold and 0.57% copper. Twenty-two rock samples, including eight historical sample assays, from the 190 metre wide zone average 0.7 g/t gold and 0.35% copper.

Directly west of the 2 kilometre sized magnetic/resistivity anomaly mentioned above, a localized EM and magnetic response occurs on two lines near the base of a steep north facing slope. This response is particularly interesting since regional geochemical silt sampling downslope generated highly anomalous Cu/Zn/Au/As values. The directly associated negative 300nT response suggests remanence magnetism from a body emplaced at a time when the earth’s field was reversed. Modeling of the VTEM electromagnetic response suggests a 15 Siemen, west dipping, approximately 300 metre long target at a shallow depth of about 40 metres. The combined strong geochemical and geophysical response is interpreted as a possible gold bearing massive sulphide target. It occurs about 200 metres west of the Hawlison monzonite. This target is about 20 kilometres southwest of Eskay Creek mine.

The isolated conductors have not been tested to date and represent very attractive targets suitable for follow-up. In several cases, these conductors are related to silt and soil geochemical anomalies or prospective rock-types such as rhyolites.

All of the airborne geophysical information is being interpreted by a senior geophysical consultant in order to outline and define the significant anomalies that were identified.

These anomalies should be evaluated by mapping, soil geochemistry, ground geophysics and trenching in order to define a prioritized set of drill targets.


Several EM Conductors Confirmed at Mulloy Graphite Project, Ontario

Posted by on Tuesday, 17 December, 2013

CARIBOU KING RESOURCES LTD. reports that several significant electromagnetic (EM) conductors have been confirmed on its Mulloy graphite project, located roughly ten kilometers west of the Zenyatta Ventures Ltd. Albany graphite project in Ontario. Four electromagnetic (EM) conductors are confirmed, three of which have a strike length over 700 meters, with the fourth striking over 600 meters in length, and all conductors remain open along strike. Each of the conductors corresponds in part with magnetic lows that are believed to indicate graphite mineralization, and one conductor is supported in part by historical drilling that encountered several intervals of graphite mineralization as described in detail below.

Michael England, CEO & Director states, “Our Mulloy property continues to demonstrate a great potential for significant graphite mineralization. Just as we expected from our earlier reconnaissance geophysics, the EM conductors are much larger than initially indicated, with a good correlation between conductivity and non-magnetic character expected for graphite mineralization. Our drill permits are expected shortly, we have a drill ready, and most importantly, we have road access directly to our drill targets.”

A total of seventeen line-kilometers of geophysics were completed at a line spacing of 100 meters, and both horizontal loop electromagnetic (HLEM) and magnetic data were collected. The survey focused on an area where reconnaissance HLEM and magnetics identified several anomalies that defined a possible northeast-southwest conductive trend (see news release, September 25, 2013). The new results confirm the previous data, extending four of the individual anomalies into southwest-striking linear conductors up to 800 meters in length that remain open along strike. The southernmost conductor ‘A’ is roughly 700 meters long, with an apparent broadening and narrowing that suggests a width of up to 100 meters along portions of the conductive zone. Conductors ‘B’ and ‘C’ are 630 and 885 meters long respectively, and both exhibit breaks along strike that may indicate offset by cross-structures. Anomaly ‘D’ is 875 meters long and exhibits broadening and narrowing up to 100 meters in width, as well as some offset along strike. Conductors C and D have significant strike lengths correlated with strong magnetic lows that are very likely due to graphite mineralization. Conductor B is near a historic drill hole that encountered 90% visual graphite in 18.68 meters of graphitic schist, followed by a second graphitic schist intersected over 19.78 meters for a total of 38.46 meters (Ontario Ministry of Northern Development and Mines, Report 42F15NE8019). An estimate of true thickness cannot be determined from the historic drilling, and the graphite content is a visual historical estimate and should not be relied upon without lab assay confirmation.

There are still several conductive anomalies identified in the original reconnaissance data to the southwest of the present survey that remain to be further delineated, and will be the focus of future ground-based surveys. The EM conductors from the present survey can be seen in plan view with magnetics on the company website at http://caribouking.com/wpsite/graphite/mulloy.


Seismic and airborne geophysics for copper project in southeast Arizona

Posted by on Saturday, 14 December, 2013

Millrock Resources Inc. recently completed a seismic geophysical survey and drilling of a single reverse circulation borehole at its Monsoon copper project in southeast Arizona. The survey results and the drill hole indicate that it is unlikely that a large porphyry copper deposit exists within 500 m of surface. The project was the subject of an option agreement with FQM (Akubra) Inc, formerly Inmet Mining Corporation, a wholly owned subsidiary of First Quantum Minerals Ltd. (“FQML”) whereby FQML may have earned a 70% joint venture interest. FQML has advised Millrock that it will withdraw from the option agreement. Millrock believes there is potential for discovery of a porphyry copper deposit at greater depth and intends to seek a new funding partner to further test the targets developed.

Prior to the recent exploration phase Millrock had carried out property-wide biogeochemical sampling, soil sampling, water well sampling, and airborne ZTEM and magnetic surveys. The work was designed to search for buried porphyry copper deposits along the projected trend of the Safford copper deposits in Laramide-aged rocks that host copper mineralization in the district.

Reprocessing and interpretation of historic seismic data had led Millrock to believe that an upthrown structural block of Laramide-aged rock may be present, and that copper mineralization may exist in the shallow subsurface. A modern 2D seismic reflection survey was carried out to confirm the historic survey in an area where Millrock had discovered polymetallic anomalies in various geochemical surveys. Two lines totaling approximately 17 km were surveyed. Two possible interpretations could be made from the seismic data. One interpretation indicated the favourable Laramide contact was at an approximate depth of 500 m below surface. Another interpretation indicated a depth of approximately 1,000 m.

A vertically-oriented 500 m reverse circulation hole was drilled as a stratigraphic test and to determine the source of the geochemical anomaly. Results of the drilling suggest that an upthrown structural block does exist in the area tested. Tertiary volcanic rock was intersected at only 100 m below surface; a much shallower level than in holes drilled by prior explorers elsewhere on the property. However, the contact with the Laramide aged rocks must lie deeper than 500 m; most likely at an approximate depth of 1,000 m.

The technical information within this document has been reviewed and approved by Gregory A. Beischer, President & CEO of Millrock. Mr. Beischer is a Qualified Person as defined in NI 43-101.

Target: The target at the Monson property is a giant high-grade porphyry copper deposit (± gold and molybdenum). The project is located approximately 50 km (31 mi) south of the Morenci Mine and 50 km (31 mi) southeast of the Safford Mine, both giant porphyry copper deposits actively being mined by Freeport McMoran.

The property is covered by post-mineral Tertiary volcanic rocks or alluvium and remains largely untested for porphyry copper mineralization. Geochemical, geophysical and geologic data, however, suggests potential for the discovery of a buried porphyry copper deposit at Monsoon.

Location and Setting: The Monsoon property is located near Duncan in southeastern Arizona approximately 50 km (31 mi) southeast of Safford, Arizona. Topography varies from moderate to flat. Paved highway 70 passes just east of the property with good access to the property provided by dirt roads.

Geology and Mineralization: The Monsoon property is located southeast of the Safford Mine along the Safford porphyry copper trend as defined by known mineralization at the Safford (Dos Pobres, Lone Star, San Juan and Sanchez), Sol and San Jose porphyry copper properties. Geochemical and geophysical data further defines the Safford trend through the Monsoon property

The project area is covered by post-mineral Tertiary volcanic rocks and alluvium, however geochemical, geophysical and geologic data suggests potential for the presence of a buried porphyry copper deposit. Past drilling is limited to two shallow holes drilled in the 1990′s by Noranda. Neither hole penetrated Laramide-aged basement, drilling only post mineral alluvium. Zones containing anomalous copper and molybdenum values were intersected in both holes. The Laramide-aged geology of the property remains largely unknown and the porphyry copper potential unexplored.


100 NEW EXPLORATION TARGETS IDENTIFIED AT MANIITSOQ (Greenland)

Posted by on Wednesday, 4 December, 2013

North American Nickel Inc.  announces that it has received preliminary results from this year’s VTEM Plus helicopter borne geophysical survey completed at its 100% owned Maniitsoq nickel-copper-cobalt-PGM project in Southwest Greenland. A total of 917.3 line-kilometres were flown in nine survey blocks (A1 to A9) resulting in a total of 389 electromagnetic (EM) responses being detected.

 

 

A preliminary review of the survey results by the Company has identified one hundred new conductor zones. These target zones will be field checked in 2014 and targets with higher nickel sulphide potential will be added to the growing drill target list at Maniitsoq. The purpose of the 2013 VTEM Plus survey was threefold: 1) To obtain EM and magnetic coverage over areas which contain norite and other mafic-ultramafic intrusions that might be associated with economic nickel sulphide mineralization.

All these new EM targets are outside the Greenland Norite Belt, which has been the focus of the Company’s exploration work for the past 3 years; 2) To obtain deeper EM penetration over prospective areas that were surveyed in 2011 with SkyTEM (the new VTEM Plus system has four times the dipole moment of the 2011 SkyTEM system); and 3) To detail other conductors of interest detected by previous VTEM and SkyTEM surveys.

NAN CEO, Rick Mark, states: “The market has been focused on the Imiak Hill Conduit Complex the past three months and rightly so, as the high grade drill results around Imiak have been outstanding. Today, we want to remind investors that our 100% owned Maniitsoq property, which is larger than the Sudbury basin, has the potential to host the world’s next sulphide nickel-copper-cobalt camp. These preliminary airborne results bolster that belief and provide us with a new array of targets to analyze and prepare for in 2014.

” From the preliminary data, the most interesting conductors are those associated with the Pingo norite in flight block A1. The Pingo norite is situated 24 km northeast of the Imiak Hill Conduit Complex, where the Company has recently made significant nickel sulphide intersections (e.g. 24.75m @ 3.19% Ni and 1.14% Cu in hole MQ-13-028 at Imiak Hill). The Pingo norite is a northeast-striking, dyke-like intrusion approximately 30 to 80 metres wide exposed intermittently over a distance of more than four kilometres. Numerous rusty zones, containing trace to 5% disseminated sulphides, occur throughout the intrusion. The strongest EM response occurs over strike lengths of up to 200 metres immediately along strike of the Pingo norite (conductors P-146 and 233) and are the highest priority targets in the block. Additionally a moderate 300 metre-long VTEM conductor (P-149 in Figure 2) occurs near the centre of the norite. From historical drill data the Pingo Norite is known to be nickeliferous. The final databases for the 2013 VTEM surveys are expected in before year-end and detailed analysis and target rankings based on this data will be carried out early in the New Year. The survey was flown by Geotech Ltd. of Aurora, Ontario and nominal flight line spacing ranged from 100 to 200 metres. Condor Consulting of Lakewood, Colorado monitored the survey for quality control and identified EM anomalies in the preliminary datasets.


Gravity, EM, radiometry and magnetic features for uranium exploration in Athabasca

Posted by on Wednesday, 4 December, 2013

 Aldrin Resource Corp. (“Aldrin”) announces completion of the ground gravity survey on the Triple M Property in northern Saskatchewan. Preliminary analysis has identified gravity anomalies coincident with our already identified priority drill targets that are consistent with bedrock uranium mineralization. Aldrin’s Triple M Uranium Property is located adjacent to and southwest of Fission-Alpha’s Patterson Lake discovery property, in the newly prospective southwestern region of the Athabasca Basin.

The gravity survey was completed by MWH Geo-Surveys Ltd. (“MWH”), based in Kelowna, British Columbia, who collected data at 871 unique stations. The survey covered two parallel strong bedrock conductors previously identified from the Geotech VTEM airborne geophysical survey, and associated surface radon anomalies. Gravity anomalies were identified over the same portions of the bedrock conductors previously highlighted by radon anomalies. The gravity anomalies are relative lows reflecting the dissolution and removal of rock mass by the same basinal fluids that may also precipitate uranium. Such extensively altered gravity lows are associated with high-grade uranium mineralization in other parts of the Athabasca Basin, and are a strong addition to our already prioritized drill targets.

Aldrin drill targets

Aldrin has developed high-priority drill tar gets on the Triple M Property. The targets are now characterized by coincident gravity lows, basement structures, conductive anomalies, radon highs, and relative magnetic lows. The return of positive results from multiple independent geophysical, geochemical and geological data sets strengthens Aldrin’s belief in the importance of the Triple M Property drill targets.

Aldrin’s CEO Johnathan More states, “We are becoming more confident in our drill targets of the Triple M Property, because each survey method we employ yields coincident anomalies consistent with uranium mineralization below. Now we have drill targets supported by coincident gravity lows, radon highs, linear bedrock conductors and geological mapping.”

 


Training Course: Gravity and Magnetic Geophysical Methods in Oil Exploration

Posted by on Wednesday, 23 October, 2013
Location:
Calgary, Alberta
Date:
Wednesday, April 9, 2014

8:30 AM – 4:30 PM

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Course Description
This basic one-day course reviews the fundamental geological and physical concepts behind oil exploration using gravity and magnetic methods. It is presented in plain English with minimal math or technical jargon, and it includes hands-on exploration examples and case studies.

Delineation of regional and local fault networks, which gravity and magnetic data enable, is crucial in both conventional and unconventional exploration and production. In frontier regions, these data help to delineate the raised and subsided crustal blocks and depocenters, as well as the distribution of igneous rocks.

The course reviews all stages of gravity and magnetic survey design, as well as data acquisition and geological interpretation. These steps are put in the context of designing and executing overall exploration programs for both conventional and unconventional targets.

A complete set of course materials and lunch is included in this course.

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Who Should Attend
This course is designed for professional and technical personnel who need to understand the basics of gravity and magnetic methods in order to assess their effectiveness in various exploration circumstances. The course is intended for all staff levels including geological, geophysical, administrative and management personnel.
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Course Outline
  • Geological Meaning of Geophysical Anomalies: Anomaly-Lithology Relationships and Relevant Rock Properties
  • Forms of Rock Bodies Encountered in Oil and Mineral Exploration
  • Gravity Exploration Methods
  • Magnetic Exploration Methods
  • Design of Gravity and Magnetic Surveys for Geologic Targets
  • Processing Methods for Gravity and Magnetic Data to Separate and Enhance Desirable Anomalies
  • Data Display and Anomaly Enhancement
  • Exploration Example: Gravity and Magnetic Studies of Alberta Basement Structure
  • Exploration Example: Gravity and Magnetic Studies in a Frontier Basin Offshore British Columbia
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Instructor
Dr. Henry Lyatsky

Henry Lyatsky is a Calgary-based geophysical and geological consultant who has worked across Canada, northern and western U.S., and internationally in oil and mineral exploration.

He was born in St. Petersburg, Russia and moved to Calgary as a teenager. He holds a B.Sc. in geology and geophysics (1985, University of Calgary), an M.Sc. in geophysics (1988, University of Calgary) and a Ph.D. in geology (1992, University of British Columbia). He is the first or sole author of three books (Springer-Verlag) on the regional geology and geophysics of western Canada, two gravity and magnetic atlases of the Alberta Basin (Alberta Geological Survey) and many papers. He is a member of CSEG, MEG and APEGA.

Henry is a past president of the Mineral Exploration Group, a province-wide mining-industry association in Alberta. To avoid the downtown rat-race and congestion, he works from home, enjoys the free space of the Alberta outdoors, and loves nothing better than in-depth history books and good hikes in the mountains.


Geophysical modelling suggests one of the world’s largest kimberite

Posted by on Wednesday, 16 October, 2013
• Geophysical modeling suggests the Magi-Kimberlite at Pangolin’s Tsabong North Project in Botswana is a 270 hectare (2.7 km2) pipe
• Drilling intersects the kimberlite across 1,200 metres at an average 35 metres below surface
• New findings build on earlier discoveries at the same site: High pressure garnet indicators have previously been recovered 14 metres above the Magi-Kimberlite
• Two new kimberlite drill targets in Tsabong North, both more than 170 hectares (1.7 km2), have been identified by the geophysical modeling.
Pangolin Diamonds Corp. announced that it has discovered one of the largest kimberlites in the world, modeled at 270 hectares (2.7 km2), at its 100% owned Tsabong North Project (the “Project”) in Botswana.
A number of the world’s largest kimberlites include:
- Se251 in Angola, measuring 220 hectares (2.2 km2)
- MK1 in Botswana, measuring 180 hectares (1.8 km2)
- Mwadui in Tanzania, measuring 146 hectares (1.46 km2)
Kimberlite Discovery
The new discovery stems from Pangolin’s discovery earlier this year of two kimberlites, Magi-01 and Magi-02, at its Tsabong North Project.
Aeromagnetic data on those finds was submitted by Pangolin for independent review by Mr. Billy Steenkamp, of Xcalibur Airborne Geophysics of Pretoria, South Africa. Mr. Steenkamp is a Qualified Person under National Instrument 43-101 rules. His observations include the following:
• The previously reported Magi kimberlites are part of a single intrusive complex with a total surface area estimated at 270 Hectares (2.7 km2):
• Some of the selected intrusive kimberlite targets could be of syn- or pre-Karoo age; and
• Two new kimberlite drill targets have been identified with total intrusive areas modeled at 170 Hectares (1.7 km2) and 175 Hectares (1.75 km2).
Based on these observations, Pangolin drilled a new hole between the Magi-01 and Magi-02 kimberlites. The new hole positively intersected the same sandy tuffs recognized in the two previous drill holes, confirming that the Magi-Kimberlite is a single large body and not two smaller kimberlites as previously believed.
The Magi-Kimberlite has now been confirmed over a distance of 1,200 metres in an East-West direction. The average depth of intersection of the crater facies sediments is approximately 35 metres. The depths of intersection of the sandy tuffs vary between 55.3 and 61.5 metres.
Further work will begin shortly; seven additional holes have been laid out for core drilling to determine the final size of the Magi-Kimberlite. These core holes will also be used towards modeling the complex geology of the crater sediments and kimberlitic sandy tuffs in preparation for future possible larger diameter drilling. Each hole will intersect at least 100 metres of kimberlite to recover any additional indicator minerals, and any diamonds. One hole will be drilled to a minimum depth of 250 metres of kimberlite intersection.
Detailed logging of the core indicates that the Magi-Kimberlite is of syn-Karoo age. This makes it older than the Cretaceous diamondiferous kimberlites of the Tsabong kimberlite field further to the south, dated at 78 million years, but potentially similar in age to the Jwaneng kimberlites, dated at 245 million years.
Core samples from all the holes are being submitted to independent laboratories to recover any additional indicator minerals, and any diamonds. High pressure garnets originating deep in the earth’s mantle have previously been recovered from the Magi-1/1 drill core, 14 metres above the surface of the Magi-Kimberlite.
Dr Leon Daniels, PhD, Chairman of the Board of Pangolin, stated: “The geophysical models available to Pangolin strongly suggest the potential for discovering additional very large kimberlites in the Tsabong North Project area.”
About the Tsabong North Project

The Tsabong North Project, located approximately 100 km north of the town of Tsabong in south-western Botswana, is 1,545 km2 in size. It is comprised of anomalous concentrations of kimberlite indicators and has large geo-botanical features. Pangolin has identified more than 50 drill-ready aeromagnetic targets in the Project area, several of which have surface areas exceeding 20 Hectares (0.2 km2).
The Tsabong North Project is situated on the margin of the Archaean Kaapvaal Craton in a similar tectonic environment to the Orapa kimberlite field. The 45 mantle-derived garnets inclusive of the high pressure garnets were discovered in the drill core Magi-01/01. These garnets are very similar in chemical composition to the garnets from the Letlhakane Mine in the Orapa area.
Pangolin’s soil sampling has produced highly anomalous concentrations of kimberlite indicators within the Project area. Microprobe analyses of indicator minerals have confirmed the presence of G10 garnets, indicating the presence of a mantle conducive to the crystallization of diamonds. A number of indicators occur, including remnants of kelyphite that indicate close proximity to kimberlite. Enzyme-leach trace element results are consistent with orientation trace element results over known kimberlites near the Project.
The Company cautions that information regarding the Se251, MK1, Mwadui, and Orapa kimberlites, and Letlhakane Mine or Orapa Mine, are not necessarily indicative of the kimberlite or kimberlite targets being drilled by the Company. The Company further cautions that there is no guarantee that the kimberlite and/or kimberlite targets being drilled by the Company will return diamond results of any economic significance.

Airborne Geophysics on Auden Graphite Property

Posted by on Thursday, 3 October, 2013

GTA Resources and Mining Inc. announces that it has commenced an airborne EM (Electro-Magnetics) and Magnetics survey on the Auden Project located adjacent to Zenyatta’s Albany graphite project in Northern Ontario. GTA is the largest land holder in this emerging graphite district with a total of 1748 claim units (approximately 28,000 hectares). Several conductive zone targets had previously been identified on its central claims from an earlier airborne survey flown in 2008. The new airborne survey will be composed of an east block and a west block which will complete the EM and magnetic coverage on the entire claim holdings.

The Auden Property is located adjacent to the south of the Albany Property of Zenyatta Ventures Ltd. who recently discovered vein-type graphite (hydrothermal) mineralization while testing electromagnetic (EM) targets. The mineralization has been described as occurring in breccia pipes (diatremes) having dimensions in the order of 200 m by 400 m. (www.zenyatta.ca). The deposits are further described as containing the largest and only high purity “hydrothermal” graphite mineralization being developed in the world. GTA has owned the Auden claims since 2010 and is the single largest land holder in the area. Furthermore, GTA’s management and geological consultants believe that the graphite breccia pipes that exist on Zenyatta’s Albany project are similar to kimberlite pipes (diatremes) and are likely to occur in clusters along structural corridors. Future exploration on the GTA claims will focus on identifying similar targets.

GTA owns a 100% interest in the Auden claims. An interpretation of the previously flown central claim block (EM and Magnetic) survey has identified 12 priority targets for follow-up. All of these targets are highly conductive and could be due to the presence of graphite (graphite has highly conducive properties). None of these conductive targets have been previously drill tested. It is anticipated that the new airborne survey will generate additional new targets for evaluation. GTA have been negotiating an exploration agreement with the “Constance Lake First Nation” prior to carrying out a follow-up program of ground geophysics and drilling, in respect of which GTA has submitted an application for a work permit from the Ministry of Northern Development and Mines.


Start of Ground Magnetic Survey of the Calvert Hill Project, Montana

Posted by on Friday, 27 September, 2013

US Tungsten Corporation , announces that they have contracted to conduct a ground magnetic survey over the Calvert Hill project in Beaverhead County, Montana. They expect the survey and subsequent evaluation to be completed by the end of October 2013.

The magnetic profile lines will be surveyed with a line spacing of 300 feet and 100 feet at locations specified by the Company. The total program is expected to be approximately 56 line-kilometers. The Total Magnetic Field and Vertical Magnetic Gradient will be measured with a resolution of 0.001 nT. A GPS system capable of XY accuracy of ±2m will be used for navigation and positioning. Deliverables should include diurnally-corrected total magnetic field data, vertical magnetic gradient, all raw and processed data, topo-based line location map, and a brief acquisition report. Delivered data will also include magnetic data Reduced to Pole and derivative, gradient, and residual maps as appropriate.

The data will then be analyzed by our advisors. A projected 2014 definition drilling program will be drafted from this information.

Tungsten occurs on the property as the mineral scheelite. Historic grades were high, with a 1967 report outlining 128,000 tons proven @ 1.10% WO3 and 218,000 tons possible @ 1.10% WO3 remaining in the open pit area. At least six zones with the potential for additional tungsten resources have been identified