Posts Tagged Quantec Geoscience

Airborne and ground geophysics for precious metal project in Mexico

Posted by on Monday, 5 May, 2014
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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.


CSAMT for gold in Paraguay

Posted by on Saturday, 8 December, 2012

Latin American Minerals Inc.  announces the commencement of CSAMT geophysical surveys at the Paso Yobai Project in Paraguay, an early start to the 2013 exploration campaign to drill the project’s multiple geochemical gold targets. The ground-based geophysical survey will initially focus on the X-Mile Trend prior to covering the Discovery Trend and multiple outlying target areas. The intensive geophysics program is expected to require 2 to 3 months. To follow up the initial deep reconnaissance survey results, the Company will implement the second phase of the program with targeted diamond drilling, expected to start by mid-February 2013.

CSAMT (Controlled Source Audio Frequency Magneto-Tellurics) is a rapid, high-resolution variant of the magneto-telluric class of geophysical surveys, designed to provide detailed section views of lithology and structural features, and to delineate any contrasting zones of hydrothermal alteration. The geophysics survey contract was awarded to Canadian company Quantec Geoscience Limited after a competitive bid process. Quantec is the world leader in deep magneto-telluric and electrical survey technologies for mineral exploration.

Miles Rideout, President and CEO of the Company, stated, “We have seen CSAMT surveys employed with excellent results on many gold systems over more than two decades. Applying this imaging technology at Paso Yobai, prior to drill testing many of our surface gold targets, will allow us to employ better structural information in the initial drill targeting, and will extend our targeting ability to more than 300 metres depth. The high resolution of CSAMT will allow us to better understand the nature, depth and orientation of major mineral targets. The potential benefits to the Paso Yobai gold project include: increased exploration depth, improved drill target identification, reduced reconnaissance drilling cost and improved target prioritization.”

About the Paso Yobai Gold Project:

The Paso Yobai Project is a 15,020 hectare exploration and mining property with multiple large gold showings mapped at surface. The two primary gold bearing structures at Paso Yobai include the 4500 metre Discovery Trend and the 14,800 metre X-Mile Trend. Additional oblique trends and outlying gold zones have been delineated by the Company’s work programs, producing a gold system footprint approaching 100 sq. km. in area.


The New High Grade Epithermal Gold Deposit in British Colombia

Posted by on Wednesday, 5 September, 2012

Seabridge Gold announces that exploration drilling this summer on its 100%-owned KSM Project in northwestern British Columbia has discovered an epithermal style of gold occurrence which contains significant widths of higher gold grades including narrow veins with the highest gold grades found at the project to date. The claim blocks are in the Iskut-Stikine region in British Columbia, approximately 20 kilometres southeast of the Eskay Creek Mine.

Geophysics

Induced polarization surveying was utilized as final confirmation, prior to drilling, that the sulfide or mineralizing system at KSM was of a world class scale and could satisfy Noranda’s minimum exploration criteria.   A pole – dipole IP survey was conducted on 7 widely spaced lines and was designed for the best combination of depth penetration and resolution. It employed an “expander array”, consisting of four 100m receiver dipoles, two 200 m receiver dipoles and finally two 300 m receiver dipoles for a total array length of 1500 m.  The widespread strong chargeability and low resistivity responses detected in rocks beneath the Sulphurets thrust fault satisfactorily demonstrate the extent of sulfide bearing, altered rocks.  However, as is typical of the IP method, it does not differentiate between areas of strong pyrite but weak chalcopyrite (copper sulfide) mineralization or those with both pyrite and chalcopyrite.

On the contiguous with Seabridge’s KSM property Treaty Creek property (American Creek Res.) magnetotelluric survey carried out in the summer of 2011 (Quantec Geoscience). The survey revealed a large conductive body at depth which extends upward to the surface and can be mapped between MT sites 214 and 216.  This area contains gossanous outcrops along with surface mineralization and also includes the previously explored Orpiment zone.  The survey also shows a more prominent feeder extending over 3km from the large conductive body at depth.  This feeder is approximately 750m wide and extends to the location of the Copper Belle zone where another large conductive body (less than 200ohm-m) appears on the survey.  The north east tip of Copper Belle, a bulk-tonnage type gold-copper-molybdenum porphyry, appears to be located at the north east tip of this lowly resistive anomaly. Details..

Drilling

KSM has proven and probable reserves totaling 38.2 million ounces of gold and 10 billion pounds of copper in four very large deposits which have an average grade of 0.55 grams per tonne of gold, 0.21% copper and 2.74 grams per tonne of silver. The new discovery has intercepts of gold and silver grades that are substantially higher. Drill hole C-12-01 encountered epithermal style mineralization in an entirely new zone at shallow depth and low elevation, called the Camp zone. This hole returned two 2 meter intercepts grading above 8 grams of gold per tonne (greater than 0.25 ounces of gold per tonne). A second hole, C-12-02, drilled 400 meters southeast of C-12-01, intersected 22.0 meters averaging 8.94 grams per tonne of gold and 41.6 grams per tonne of silver. This hole returned a 2 meter intercept of 66.7 grams of gold per tonne (more than 2 ounces per tonne) and 287 grams per tonne of silver (nearly 10 ounces per tonne). A third hole into this zone, C-12-03 drilled 900 meters to the northeast of C-12-02, returned 98.7 meters at an average gold grade of 2.11 grams per tonne including 17.7 meters averaging 4.41 grams per tonne of gold and an additional 6.0 meter intercept averaging 6.24 grams of gold per tonne.

Seabridge Gold CEO Rudi Fronk said the new discovery appears to have the potential to make a significant contribution to KSM’s already robust economics. “Obviously, we are at a very early stage in the discovery process. However, the Camp zone is readily accessible and has the highest gold grades found to date. All three holes into this new zone found excellent gold values,” he said.

“This is not the target we were looking for in this year’s program…we were exploring to find a high grade, copper-rich core and that work continues with encouraging results. Our original assumption was that neighboring Pretium Gold had the higher grade, epithermal (top) portion of the very large gold-copper porphyry system we see at KSM and that our property would probably host the high grade copper core of the entire complex at depth. The new Camp zone appears to be part of an epithermal system with chemistry similar to that found nearby at Pretium’s extraordinary Brucejack deposit. We intend to complete another six holes into the Camp zone this drill season to establish the orientation of this new discovery. At the same time, we continue to pursue several promising copper core zone targets. An additional exploration drill rig has been mobilized to site, bringing the total to three,” Fronk said.

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Geophysical Survey Results That Extend Hope Brook Mineralized Structure

Posted by on Wednesday, 9 November, 2011

The Titan 24 geophysical survey by Quantec Geoscience Ltd. indicates that the mineralized structure extends along strike southwest of the old Hope Brook mine area for at least one kilometre and to depths of at least 400 metres. – Induced polarization (IP) surveys done by Castillian north of the Hope Brook deposit suggest the Mine zone has been offset to the north along a fault and potentially extends much further northeast than previously thought. – Grab samples taken from outcrop proximal to this potential northeast extension returned values of up to 168.9 g Au/t.

Castillian Resources Corp.  announces the results from the Quantec Geoscience Ltd. (“Quantec”) Titan 24 geophysical survey (“Titan 24″ or the “Survey”) and the Castillian induced polarization (“IP”) surveys completed at the Company’s Hope Brook gold property located in southwest Newfoundland. These surveys are described in a press release by the Company dated June 28, 2011. In addition, Castillian has completed a prospecting and mapping program along approximately 8km strike length of the mineralized structure extending from about 1 km northeast of the open pit southwestwards through historical showings in the Chetwynd and Chetwynd South areas.

Prospecting has identified a number of occurrences of gold in bedrock along the 8km strike length, including the potential northeast extension where one sample returned 168.9 g Au/t (Figure 2). Several samples also contain significant Cu values up to 10.2% Cu. A total of 213 samples were taken, of which 42 returned values of 0.5 g Au/t or greater.


Detailed Geophysical Survey in Argentina

Posted by on Tuesday, 27 September, 2011

Metallum Resources Inc. announces that is has completed a detailed geophysical program covering, and extending beyond, the known gold/silver mineralization exposed for approximately 1.2 kilometres (“km.”) of strike and 0.5 km. of width on surface at its M-18 gold/silver property in Chubut province, Argentina. The objective of the geophysical program was to assist in defining additional strike length, width, and depth to this mineralized zone. Gold and silver occurs disseminated within a low sulphidation system of quartz veining and quartz stockwork.

Quantec Geoscience (Mendoza, Argentina) completed approximately 58.8 line km. of gradient Induced Polarization (“IP”) and ground magnetics with supporting coverage using pole-dipole IP. The original planned geophysical program called for approximately 42 line km. of survey (see Metallum’s press release of August 11, 2011), however, open-ended anomalies identified after completion of the original planned program required additional work to properly investigate these anomalies along strike.

Geophysical coverage extended approximately 1.4 km. and 500 m respectively along strike in each direction beyond the exposed gold/silver mineralization as well as approximately 800 m in each direction beyond the exposed width of the mineralized zone. The survey coverage included evaluation of a large untested zone of argillic alteration occurring within a few hundred metres of the known gold/silver mineralization.

Results from the geophysical survey showed that the known exposed zone of gold/silver mineralization is clearly identified on the gradient and pole-dipole IP chargeability and resistivity at depth and along strike. Furthermore, IP anomalies related to this mineralized zone extend beyond the exposed rock beneath the cover of gravels, indicating that the gold/silver mineralization is potentially continuing along strike. In addition to this, the large zone of argillic alteration shows a strong chargeability/low resistivity anomaly extending for approximately 2 km in strike and 600 m in width. Depth extent to this zone continues beyond the 250 m investigation depth of the IP detectability.

View IP gradient chargeability map:

As well, the ground magnetics survey supports some of the structural features identified by the gradient IP and has also identified a strong magnetic feature on the east end of the survey area which will be investigated by geological work and/or drilling.

Metallum also reports that the geological program comprising an extensive campaign of geological mapping, detailed channel sampling, and approximately 8 km. of trenching with channel sampling is planned to commence during October, 2011. The objective of the program is to expose additional strike and width to the 1.2 km strike and 0.5 km width of the known gold/silver mineralization, which is covered by a thin veneer of gravels at its perimeter and remains open in all directions. As well, the geological work will evaluate the large zone of argillic alteration (mentioned above) in context with the strong IP chargeability/low resistivity response identified from the geophysical survey.

Results compiled from both the geophysical program and planned geological/sampling programs will identify primary targets for a Phase 1 drilling campaign planned for Q-4, 2011.

Metallum’s President and CEO, Greg Lipton, states that “Metallum is excited by the results from the geophysical program. The known zone of gold/silver mineralization clearly shows strike extension beneath the gravels as well as at depth. In addition, the strong IP chargeability/low resistivity anomaly covering the large, untested zone of argillic alteration is indicative of mineralization continuing at depth. Also, additional, highly anomalous geophysical targets have been identified elsewhere on the property. Metallum now looks forward to the detailed channel sampling and trenching program that is about to begin on the property to add another dimension for target development for the Company’s drilling program.”


Preliminary Gnaweeda IP Survey Results

Posted by on Thursday, 15 September, 2011

Archean Star Resources Inc. announces that it has received preliminary results from the recently completed, approximately 12 line km IP Survey at the Gnaweeda Gold Project in Western Australia. The Gnaweeda Gold Project consists of four tenements of approximately 170 square kilometers and is in close proximity to the town of Meekatharra in the Murchison Gold District of Western Australia, where historically approximately 3.5M ounces of gold has been mined previously from open pits around the town.

The survey, conducted by Quantec Geoscience (“Quantec”), covered portions of the St. Anne’s and Bunarra gold prospects and successfully imaged resistivity and IP chargeability to a depth of approximately 500 meters. Quantec incorporated an overlay of historic and current drill results to assist in interpreting the information gained during the survey, which, along with a review by the Company’s senior geologist, Dr. Clay M. Conway, Ph.D. P.Geol, and Mr. W. Robertson, Chief Geophysicist of Value Adding Geophysics of Perth, WA, is to be used to assist in locating drill holes for the upcoming diamond drill program at Gnaweeda that is expected to commence mid October.

At the St. Anne’s prospect, a north-trending IP chargeability low to the west corresponds with a belt of felsic volcaniclastic rocks and a north-trending IP chargeability high to the east corresponds roughly with a belt of mafic volcanic rocks. The boundary area between the two belts is a major shear zone as interpreted by aeromagnetic data and corresponds to a fault on a 1997 map based on lithologies at the base of RAB holes. The IP data and local shallow resistivity highs at St. Anne’s coincide with gold anomalies identified in previous shallow drilling in this boundary zone and provides guidance for the upcoming drilling program.

At the Bunarra gold prospect, the IP survey identified a large resistivity zone at depth under the general drill area, but also a pronounced IP chargeability high in the near vicinity where the Company intersected 11.71 g/t Au over 18 meters in its 2010 diamond drill program, and 0.31 g/t Au over 79 meters during its March 2011 diamond drill program. Follow up drilling is planned to test the extension of the mineralization and particularly to drill the IP chargeability high.

Additionally, the Company intends to conduct a follow up diamond drill program in the vicinity of the 3 meters of 8.27 g/t Au and 16 meters of 2.46 g/t Au intersections identified at the Turnberry zone during the 2010 drill program.


IP-Mag survey in Argentina

Posted by on Saturday, 13 August, 2011

Metallum Resources Inc. announces that is has commenced an aggressive $CND 2.9 million exploration campaign covering the mineral rights of its 6,300 hectare M-18 gold/silver property in Chubut province, Argentina. The first phase of this campaign will be geophysics, followed by detailed geological mapping and sampling, and ultimately a program of diamond drilling planned for the fall of 2011.

A geophysical crew, under contract from Quantec Geoscience in Mendoza, Argentina, has begun a program of gradient Induced Polarization (“IP”), pole-dipole IP, and ground magnetics comprising 42 line kilometres (“km.”) of survey. The objective of the geophysical program is to assist in defining additional strike length, width, and depth to the known gold/silver mineralization exposed on surface. It is anticipated that the geophysical program will extend for a period of approximately three weeks. This will be followed by an extensive program of geological mapping, detailed channel sampling, and approximately 8 km. of trenching with channel sampling. The objective, of which, is to expose additional strike and width to the 1.2 km strike and 0.5 km width of the known gold/silver mineralization, which is covered by a thin veneer of gravels at its perimeter.

Metallum is earning a 70% interest in the M-18 property under an Option and Joint Venture Agreement from Silver Standard Resources Inc. (“Silver Standard”). Previous geological mapping and rock outcrop sampling by Silver Standard identified a gold/silver-bearing epithermal vein system with intense alteration over a strike length of at least 1.2 km. with widths of 0.5 km. Gold assay results from 98 rock samples from systematic mapping distributed over the strike length from this program returned values ranging up to 4.63 grams/tonne (“g/t”) gold and 47.20 g/t silver.

Metallum’s President and CEO, Greg Lipton, states that “Metallum is encouraged by the potential of this entire 63 sq. km. property which has never been drill tested or undergone any systematic property scale exploration such as detailed geologic mapping, geophysics, or geochemistry. In addition to the planned M-18 exploration program of geophysics, detailed geological sampling, and diamond drilling described above, exploration will ultimately expand into the surrounding terrain where extensive argillic alteration has been identified”.


Geophysical Survey at Lutila Gold Licence, Slovakia

Posted by on Tuesday, 14 June, 2011

Ortac Resources Ltd, exploration and development company focussed on precious metal projects in Europe, announces the commencement of a ground based geophysical survey over the northern section of its 63 km sq Lutila Exploration Licence Area (‘Lutila’) to generate gold mineralised targets for follow up drilling.  Lutila is part of the Company’s flagship Kremnica Gold Project in Central Slovakia and is contiguous to the Kremnica Mining Licence Area, which has a current JORC resource of 1.1 million ounces of gold equivalent, and is being fast-tracked towards production.

The Titan 24 ground based geophysical survey will be conducted by Quantec Geoscience Ltd (‘Quantec’) and will consist initially of three survey lines, totalling 7.2km each, of direct current, induced polarisation and magnetotelluric resistivity data acquisition.  Each Titan 24 line will be approximately 2.4km long with each survey line having the ability to acquire data over a 100m wide zone.  All field data will be compiled, processed and interpreted by experienced professionals at Quantec’s Interpretation Centre in Toronto, Ontario.

Ortac CEO Vassilios Carellas commented, “This geophysical survey represents our initial phase of work focussed on the exploration of the wider Kremnica Gold Project, which we believe has the potential to house a gold equivalent resource in excess of 2 million ounces.

“The previous work carried out at Lutila has indicated that the gold mineralisation may be of a similar style as that at the Kremnica deposit, which we are currently fast-tracking towards production.  Any Kremnica-type vein potential at Lutila is believed to be hosted in the underlying andesitic volcanic sequence, as at Kremnica, rather than in the surface outcropping rhyolites, therefore this Titan 24 ground based geophysical survey will be highly valuable in identifying economic mineralised targets for drill testing.”

Geology & Structure

The geology of the Kremnica gold deposit is well established. The Šturec zone is continuously mineralised for 1,200 m along strike, is typically 100 to 150 m wide and extends to a known depth of at least 300m. The main part of the Šturec zone is the Schramen Vein, which is up to 100 m wide along a 500 m strike section and accounts for some 90% of the gold contained in the Kremnica measured and indicated resources.

It is a massive to sheeted quartz vein that strikes almost due north, generally dips steeply to the east, and thins to the north, south, and at depth. Some additional exploration is required to clarify the extent and continuity of hanging and footwall mineralisation in the Šturec zone.


Airborne EM survey in Chile for copper-molybdenum project

Posted by on Friday, 7 January, 2011

International PBX Ventures Ltd. announces that Geotech Ltd. has completed its helicopter-borne ZTEM and magnetic surveys on the Company’s Copaquire and Huatacondo copper-molybdenum projects, located in northern Chile.

The airborne geophysical data will be analyzed to aid in the selection of drill targets for the Company’s previously announced drill program, which will commence in February, 2011 as well as for the selection of further exploration targets on unexplored areas of the property.

The airborne survey was conducted over known areas of copper and molybdenum mineralization (Sulfato and Cerro Moly) and the particular signature of these mineralized zones will be useful in identifying similar signatures in other areas in the Copaquire and Huatacondo properties.

The survey was also flown over the recently completed Titan deep penetration IP survey area, which will be the initial focus of the upcoming drill program. Comparative studies between the two geophysical surveys and subsequent drill results will be conducted in order to prioritize generated airborne survey targets over the entire property.

George Sookochoff, President & CEO of PBX, said, “We believe that this comprehensive and systematic airborne survey is an excellent tool not only to qualify new drill targets but also to get an overlook of the entire property. The Company expects to receive the results from Geotech Ltd. by the end of the month.”

The ZTEM system is one of the leading airborne geophysical systems in use today and is particularly suited to identifying large conductive ore bodies. The ZTEM system is renowned for its deep penetration, high spatial resolution and ability to detect and differentiate weak electro-magnetic anomalies at depths up to 1,500 metres.

The Copaquire porphyry includes three zones: Sulfato North, South and Cerro Moly and covers an area of about 7 square kilometres and encompasses potassic, phyllic, argillic and propylitic phases of alteration and as such possesses all the alteration characteristics ascribed to typical calc-alkaline porphyry copper systems. The porphyry has a leached cap and secondary chalcocite blanket, more typical of Andean porphyry systems like the nearby Collahuasi deposit which is exposed in the Sulfato Zone north of the Cerro Moly ridge.

Most exploration drilling to date has concentrated within a molybdenum stockwork system at the Cerro Moly Zone over an area of approximately 48 hectares. This zone remains open at depth and along the SW-NE long axis of the mineralized trend.

The Cerro Moly Zone is related to the emplacement of a distinct and younger mineralization event (Molybdenum-Rhenium stockwork) within an earlier larger porphyry copper system which hosts mostly copper mineralization.


Comprehensive geophysics for Utah’s copper district

Posted by on Thursday, 23 December, 2010

Andover Ventures Inc. announces today that Quantec Geoscience of Toronto, Ontario, Canada are currently conducting an IP (induced polarization) survey on the Big Hill prospect located on Chief Consolidated Mining Company’s (Chief) property (a subsidiary of Andover), East Tintic Mining District, Utah. Data is being collected from IP lines being conducted by Quantec utilizing the Titan IP/ DC system which is an alternate system to conventional IP survey systems. The Titan IP/ DC system provides a better IP and resistivity resolution than conventional IP. Weather permitting, the field work will be completed by the end of 2010.

Western Geco has completed a MT (magnetotelluric) survey on the Big Hill prospect. This data has allowed Western Geco to develop a final MT inversion model for the Big Hill prospect and this model has been sent to Kennecott for their review.

MPX Geophysics based in Markham, Ontario, Canada has completed an airborne magnetic survey. An aeromagnetic survey is a geophysical method used for imaging rock units with variable magnetic characteristics. This passive measurement method measures the intensity of the ambient magnetic field by towing a magnetometer on a pre-determined grid behind a helicopter. The resulting magnetic map will show the distribution of rock units based on their magnetic mineral content. The final report has been forwarded to Kennecott and upon data interpretation will be used to visualize geological units and to interpret subsurface geological structure.

The initial 2010 work program commenced in August of 2010 and included an airborne magnetic survey, IP (induced polarization) survey, a ground MT (magnetotelluric) survey, surface mapping, grab sample analysis with PIMA and assay, review and re-assay of Anglo American core from the Big Hill prospect and a compilation and review of old mine data from Chief’s property.

Under the terms of the agreement, Kennecott may earn a 51% interest in the Big Hill Project by completing a Pre-feasibility Study or incurring $20,000,000 in expenditures, whichever occurs first, and an additional 4% interest by funding all Project costs until delivery of a Feasibility Study accepted by Rio Tinto.

The Big Hill porphyry target is located in the East Tintic Mining District approximately 43 miles south east of Rio Tinto’s Bingham Canyon Mine, which is recognized as one of the worlds largest open pit copper porphyry deposits. A stock work of quartz vienlets occupies the core zone of the Big Hill target area with a lithocap super imposed on the stockwork, a process known as telescoping. Lithocaps usually define the shallow parts of porphyry copper systems typically above the main Cu-Au-Mo zone.


Substantial geophysical survey in Chile

Posted by on Monday, 20 December, 2010

SAMEX is conducting a multi-project, multi-faceted exploration program at its large, wholly owned Los Zorros property holdings in Chile. Thus far, three core drill holes have been drilled and a fourth hole is in progress. SAMEX recently secured major funding which has facilitated a significant expansion and extension of the exploration programs on its various projects. While core drilling is ongoing, the Company is also preparing for a substantial geophysical survey over large portions of the Los Zorros district utilizing the Titan 24 proprietary deep-earth-imaging technology from Quantec Geoscience.

Following is an overview of the exploration progress and planned activities for various projects at Los Zorros:

Cinchado Gold Project – Three core holes have been drilled thus far. Data evaluation is ongoing and a Titan 24 survey line has been prepared to cross over the project area and results will be incorporated together with all mapping, sampling, drilling and historic data to guide additional drilling in the Cinchado Project area.

Titan 24 Geophysics - The Titan 24 Magnetotellurics and IP/Resistivity is a deep-earth-imaging technology system that images conductive mineralization, disseminated mineralization, alteration, structure and geology for targeting of drill holes to depth. Grid-lines are currently being surveyed-in for the geophysical program scheduled to begin in January 2011. Data from the Titan 24 survey will be correlated with data from drilling to help guide exploration throughout the extensive Los Zorros district.

The Los Zorros property contains numerous large-sized gold and gold-silver-copper targets on a single property holding and thus represents a very important, strategic opportunity for SAMEX. The prospect is geologically well situated within the highly prospective mining belt that contains the copper-gold ore bodies of the Punta del Cobre District (150 million cumulative tonnes with an average grade of 1.5% copper, 0.2 to 0.6 g/mt gold, 2 – 8 g/t silver), the large Candelaria mine (460 million tonnes containing 0.82% copper, 0.22 g/mt gold, 3.1 g/mt silver), the large, mined-out Chanarcillo silver deposit (+100 million ounces of silver), plus many smaller copper-gold and gold ore bodies which still locally support mining operations. Infrastructure for large mining activity is readily available in the area with power, transportation, water, communications and manpower all within advantageously close distances. Because of the large size of the property, and the fact that our exploration is still in progress, the information and ideas behind the targets currently being developed must be considered as an evolving picture. The possibility of defining further new target(s) on the property remains strong.


The new porphyry target at 0.5 km depth

Posted by on Thursday, 4 November, 2010

Romios Gold Resources Inc. announces the results of the Titan 24 geophysical survey carried out by Quantec Geoscience (Quantec) during August 2010 on its Trek Property in the Galore Creek area in north-western British Columbia. The objective of the survey was to map and detect porphyry mineralization at depth targeting the North and Tangle Zones. Titan 24 surveys have been a part of the successful identification of porphyry ore bodies and extensions of known ore bodies at other locations in British Columbia. The surveys measured the resistivity (DC), induced polarization (IP), and magnetotelluric (MT) properties of the underlying rock.
Highlights of the Survey:

  • The survey identified a large deep conductor 500 metres long, 300 metres wide and 200 metres high across all three lines in the North Zone. This conductor remains open to the North and the South. This new feature, which lies east and below the previous drilling and occurs from 500 to 675 metres below surface, represents the main target for future drilling. The conductor provides an opportunity for significant added tonnage to the North Zone.
  • The analysis and interpretation of the DC, IP and MT results also identified several chargeable anomalies above the deep conductive zone. These anomalies coincide reasonably well with the results of the existing 23 drill holes on the North Zone. The Company intends to continue drill testing these anomalies in its next drill program.
  • On the Tangle Zone, three pronounced IP anomalies were identified along the profile. These are located above a deep conductive zone which is the main drill target in the Tangle Zone. The IP anomalies and the deep conductor correlate well with grab sample assays and a significant soil copper-gold geochemical anomaly. Romios intends to drill this zone in its next drill program.

Tom Drivas, the President of Romios Gold, states, “We are very pleased with the results from the Titan 24 survey. The upper level results correlate well with the drilling at the North Zone, but what is even more exciting is the new large deep anomaly below our drilling to date which may represent the main porphyry body thought to be the source of the upper level mineralization. The survey results at the Tangle Zone are particularly encouraging as they correlate strongly with high copper-gold soil geochemistry. Romios intends to drill-test the new targets which have the potential to host significant incremental copper-gold porphyry mineralization on Trek.”

North Zone – Line 1
This 1.2 kilometre line extended from east of the known mineralization to the collar of TRK08-05. The results of the survey clearly indicate a two conductive layer structure separated by a resistive sub-surface layer. The deep conductive zone, which also extends through lines 2 and 3, is the main target as it may represent the main porphyry system. The results also indicate a large high chargeability anomaly near hole TRK08-05 that correlates with high content of pyrite, and four small IP anomalies that may represent alteration zones. One large high chargeability anomaly at approximately 250 metres depth may correlate to a possible fracture zone and is located near drill holes TRK08-01, 02, 03 and TRK 09-06 which contain mineralized porphyry occurrences with significant copper-gold mineralization. This anomaly is located at the edge of the profile and cannot be completely resolved by the inversion of the data.

North Zone – Line 2
The second and northern-most line transects the North Zone 500 meters north of Line 1. Line 2 extends from east of the known mineralization westward to terminate 150 meters northwest of TRK10-04. This line displays a zone of high conductivity north of TRK10-04, untested by drilling. Other areas of moderate-high conductivity at the North Zone are associated with copper mineralization. The upper resistive layer is sectioned by two main conductive zones. The main deep conductive zone appears on Line 2 at a depth of 600 metres. A weak IP chargeability anomaly appears near the main conductive anomaly at 250 metres depth and may represent potential alteration or mineralization. Drill holes TRK10-03, 10-05 and 10-06 encountered mineralized porphyry dykes above this zone and confirm the zone’s exploration potential.

North Zone – Line 3
The third Titan 24 survey line was placed between Lines 1 and 2, and transects the center of the North Zone from east to west. Generally, the IP and DC patterns reflect those in Line 1. Three high chargeability anomalies can be identified on this profile. A large IP anomaly on the west side of Line 3 correlates with zones of copper-gold-silver mineralized breccias. The first high chargeability may correspond to a near surface anomaly. The second high chargeability is approximately at a depth of 300 metres and remains to be drill tested. The third high is at 300 metres depth on the west side of Line 3 and correlates with zones of copper-gold-silver mineralized breccias. This IP anomaly dips to the east, mirrors a zone of moderate conductivity, and joins with a significant MT anomaly at 500-650 meters depth, interpreted as being the main deep conductive zone displayed on Line 1 and 2. Drill holes TRK10-07 and 10-08 also encountered mineralized porphyry dykes above this zone and further confirm the zone’s exploration potential.

Tangle Zone – Line 4
Three high chargeability anomalies located at approximately 100 metres depth are above a deep conductive zone which appears to extend from 400 metres to 600 metres depth. Results from each of the DC, IP, and MT surveys transecting the Tangle Zone indicate interconnected conductive anomalies that extend from surface to 600 meters depth. At surface, the conductive anomalies correlate with a 700 x 200 metre-wide area highly anomalous in copper and gold derived from gridded soil sampling. Outcrops in the vicinity of the conductive anomalies and soil anomalies contain bornite and chalcopyrite mineralization in porphyry intrusive. Grab samples assayed up to 9.6 g/t Au, and 16.45% Cu with 7.56 g/t Au. Soil sampling in the area assayed up to 5.31 g/t Au and 12.2% Cu.

Titan 24 Survey Parameters
The Quantec Titan 24 DC, IP and MT system is a state of the art geophysical tool used to explore for copper-gold mineralization. Four 1.2 kilometre-long lines, three transecting the North Zone at 250 meter spacings and one transecting the Tangle Zone, were completed at Trek. Each line was surveyed using a dipole-dipole configuration with a dipole size of 50 metres and measured the resistivity (DC), induced polarization (IP), and magnetotelluric (MT) properties of the underlying rocks. The Titan 24 system is capable of measuring properties simultaneously and comparing them to ensure accuracy. The system’s high-resolution digital signal processing and data multiplicity within the array and over time detects and resolves smaller signals from deeper targets while filtering noise. At these line lengths, the Titan surveys permit reliable, high-resolution analysis from surface to 400 meters depth for DC and IP, and down to 1,000 metres for MT. Inversion of the DC and IP data was completed using the UBC3D inversion code.

You can view the geophysical cross sections showing the Titan 24 survey results at the North and Tangle Zones by visiting the following location on the web: http://www.romios.com/s/Trek.asp


IP survey at Highbank Lake project

Posted by on Thursday, 16 September, 2010

Northern Shield Resources Inc announced exploration updates for the Wabassi and Highbank Lake projects and exploration activities in Quebec.

Northern Shield is planning an IP geophysical survey at its Highbank Lake project in northern Ontario in which Northern Shield currently has 55% interest and Impala Platinum Holdings Limited has 45% interest. The survey will be conducted by Quantec Geoscience of Toronto, Ontario and will commence shortly.

Drilling in 2007 indicated that drill holes 07HB-01 and 05 intersected what management believes to be the very top of the Critical Zone which marks the transition from mafic to ultramafic rocks. It is just below this transition in the Bushveld Complex in South Africa that the two main PGE-bearing reefs are located. The IP survey will be conducted over several profiles in an area where the Critical Zone is projected to come near, or, to surface. Previous work by Northern Shield has identified grains of sperrylite and pentlandite along with chromite grains and boulders in stream sediment samples immediately adjacent to this target area. The data from the IP survey will be used to guide drilling in an upcoming program that is being planned.

The proposed route of a road and railway which will access the near-by Black Thor and Black Label chromitite deposits in the Ring of Fire now owned by Cliffs Natural Resources passes through the Highbank Lake Intrusive Complex. Previous drilling by Northern Shield also intersected significant vanadium-iron-ore mineralization at Highbank. The economic viability of the vanadium, or any other deposit found on the Highbank property would be greatly improved by the existence of a road and railway.

Mr Ian Bliss president and CEO of Northern Shield said that “We are very excited to be getting back to Highbank Lake. There are vast areas of the property that have not been touched by past drilling that warrant a thorough investigation based on the abundance of data that supports PGE mineralization at Highbank. The vanadium-iron ore mineralization also comes into play with the proposal of the railway route passing nearby and future exploration will likely include work to better evaluate the vanadium.


Chihuahua’s geophysical survey

Posted by on Wednesday, 25 August, 2010

Dia Bras is a Canadian exploration mining company focused on precious and base metals in Chihuahua State and other areas of northern Mexico.

Dia Bras Exploration Inc. reports that a major geophysical survey has been completed on its 100% owned Bolivar Property which is not subject to any royalties, Chihuahua State, Mexico. Field checks have been conducted to examine anomalies detected during a recently completed Titan 24 Induced Polarization (IP)/resistivity survey contracted to Quantec Geoscience of Toronto, Ontario.  Two areas were covered during the survey, where eight lines totaling 9,000 metres were measured across the Banda Fault near the Bolivar Mine, and three lines totaling 2,700 metres were measured at the La Cascada high-sulfidation gold deposit. Condor Consulting of Lakewood, Colorado, has been retained by Dia Bras to assist in the planning of the IP/resistivity surveys and with the interpretation of the results.

“The surveys just completed at La Cascada and the Banda Fault areas have shown very promising results that confirm important mineralization can occur in these areas,” stated Daniel Tellechea, President & CEO. “These very positive results focus our drilling on targets that have the potential to host very important mineralization. At La Cascada, our target is a multi-million ounce gold deposit, while at the Banda Fault area our target is a major, stratabound skarn or replacement deposit with copper-zinc grades equivalent to what we have been producing from the Bolivar Mine for the past five years.”

La Cascada

Three survey lines at La Cascada were completed in this area of rugged terrain: a 1,000-m-long N-S line and two E-W lines (800 and 900 m), which resulted in detection of three significant chargeability and resistivity anomalies – all of which are associated with anomalous grades of gold in outcrop, as evidenced by the results of chip-channel sampling over 2-metre widths. The southernmost anomaly on the N-S line starts at 50 m depth. Sampling of outcrops over an area of 50 x 85 m was conducted prior to the survey and the six samples assayed 0.6 – 1.1 g/t gold.

Sampling in the area of the central anomaly (also starting at 50 m depth), completed over a 40 x 50 m area (also prior to the survey) resulted in the eight samples assaying 0.5 – 2.1 g/t gold.

Sampling in the area of the northernmost anomaly, completed over a 10 x 20 m area (also prior to the survey) resulted in the three samples assaying 0.4 – 3.0 g/t gold.

The sampled areas between the anomalies yielded very low grades of gold, generally less than 0.1 g/t.

These survey results are very positive because of the strong correlation between elevated gold in outcrop and strong chargeability anomalies. This correlation indicates that the probability that the three chargeability anomalies are associated with gold mineralization at shallow depths is very high.

The truncation of the chargeability anomalies at an apparent constant 50 m depth is inferred to be the result of oxidation of the high-sulfide zones, remnants of which appear on the surface as 1-2% pyrite and abundant jarosite, hematite and goethite.

Drilling will target the near-surface, coincident strong chargeability (IP) and resistivity zones detected during the survey. Drilling is scheduled to commence during late August, when an access road is completed to the selected drill sites. At least ten holes of 200-300 m depth each are planned for this first phase of drilling.

The area surveyed is only about 10% of the area known to host strong gold anomalies, where sampling has returned values up to 15 g/t Au.

Banda Fault

Eight E-W lines 600 m to 1500 m in length at the Banda Fault area were measured across this major, NW-trending fault. The objective of the survey was to locate geophysical anomalies associated with NW-trending and NE-trending faults. Faults of these orientations control the location of high-grade copper-zinc mineralization in the Bolivar Mine. The anomalies can be separated into two general groups: near-surface anomalies and sub-surface anomalies.

Each of the near-surface anomalies occurs in andesite and is associated with elevated sulfide content, usually 1-3%, epidote and minor silicification. The anomalies are generally on low hills, reflecting their being underlain by the resistant silicified rock. The anomalies on lines 3, 5, 6 & 7 indicate a NW-trending structure (herein named the Nathalie Fault) parallel to the Banda Fault that passes near Increíble. There are significant geochemical anomalies associated with this structure, which may be a very important feeder of mineralizing fluids into the metasediments. This structure may be the main feeder of the mineralizing fluids, and not the Banda Fault as has been inferred prior to the survey.

The sub-surface anomalies are generally located west of the Banda Fault and are in a position to be the stratabound, large-tonnage replacement and/or skarn deposits that have been a major target for the Company.

The survey results are very encouraging. It has identified the Nathalie Fault, which is now inferred to be the major feeder for mineralization at the property. Drill hole 287, completed in March 2009, was drilled to a depth of 650 metres as a test of the Banda Fault and was placed between the Banda Fault and the Nathalie Fault. It was collared on what is now known to be the edges of a chargeability anomaly, a magnetic low and a moderate resistivity anomaly. The chargeability anomaly tops out at 100 m depth at the drill site, and at this depth, the hole entered increasingly skarnified andesite with disseminated sulfide mineralization. At 450 m depth, the hole entered the metasediments, which are present as marble and represent the upper portion of the metasedimentary section – above the Upper Skarn target. That is, the hole did not reach the target of the Upper Skarn horizon.

The new interpretation is that the Nathalie Fault, which is west of hole 287, will have on its west side the Upper Skarn target at a shallower depth, possibly 300-400 m. This area will be drilled by placing a NE-SW line of holes about 200 m NW of hole 287 and straddling the Nathalie Fault. This is an important target.



Northern Tiger Resources for Yukon Exploration Program

Posted by on Thursday, 27 May, 2010

Northern Tiger Resources Inc.  announces that it has commenced a $2.6 million exploration program on its Yukon projects.

“The Yukon is continuing to gain attention as a great place to invest and explore, and we are excited to see our 2010 exploration program ramping up,” says Greg Hayes, President of Northern Tiger Resources.

Sonora Gulch
The Sonora Gulch project is 100% owned by Northern Tiger. As disclosed in a news release dated March 2, 2010, the property hosts a large gold geochemical anomaly covering approximately 9 square kilometres with gold-in-soil values ranging from trace to 2,340 ppb (average grade of 56 ppb over 1,971 samples). Contained within the broad gold anomaly is a 2 kilometre by 1 kilometre copper-molybdenum anomaly that the Company is evaluating as a copper-molybdenum porphyry system (see news release dated February 25, 2010).

A crew has been mobilized to the Company’s Sonora Gulch camp to begin line-cutting in preparation for a deep penetrating geophysical survey by Quantec Geosciences Ltd. (the “Titan 24 Survey“). The survey is scheduled for mid-June, and will measure direct current resistivity and induced polarization to depths up to 750 metres. The primary target for the Titan 24 Survey is copper-molybdenum porphyry mineralization.

Following completion of the Titan 24 Survey, Northern Tiger is planning 12 to 15 diamond drill holes (3,000 metres) on the Sonora Gulch property. The drill program is being planned to test the property’s porphyry potential as well as one or two of the high-priority gold targets contained within the broader 9 square kilometre gold-in-soil anomaly identified on the property. The drill program is anticipated to begin in late June.

Airborne magnetic of Sanora: http://www.northern-tiger.com/i/pdf/Airborne_Magnetics_Sonora_Gulch.pdf

Minto-style Targets
Northern Tiger acquired five properties from Capstone Mining Corp. (“Capstone”) covering exploration targets where previous prospecting encountered copper mineralization similar to that found at Capstone’s Minto Mine. In addition, Northern Tiger and Capstone have a Regional Exploration Alliance Agreement (through Capstone’s wholly owned subsidiary Minto Explorations Ltd.), which provides for input and cooperation on planning and executing exploration programs and long term strategies for the area, sharing of technical expertise to assist in exploration and project advancement, and access to Capstone’s infrastructure to facilitate area exploration.

Two diamond drill holes (500 metres) are planned to test a Gradient Array Induced Polarization anomaly coincident with a copper-in-soil geochemical anomaly located on the DAD property (see news release dated April 13, 2010). The distinct chargeability high anomaly is suggestive of disseminated sulphide mineralization. It is 350 metres wide on the eastern end and 200 metres wide on the western end. The anomaly is in excess of 300 metres long, and open to both the east and west. The DAD drill program is anticipated to occur in early September upon completion of the Sonora Gulch drilling.

A surface exploration program is planned to investigate a number of airborne geophysical targets identified on the MEL property, which is located immediately to the north of Capstone’s Minto Mine. Additional surface exploration work is also planned to follow up on targets identified on the DEL and LED properties. This work is expected to occur in June, and if results warrant, ground geophysics surveys will be conducted over specific targets later in the season.


Quantec Titan results in Nevada

Posted by on Monday, 26 April, 2010
Boxxer Gold Corp.  announces the results of the Quantec TITAN-24 DCIP/MT survey completed over its 100% owned Boss and Crystal Pass projects located in the Goodsprings Mining District, southwest Nevada. The identified targets combined with the previous exploration results suggest huge potential for the district.
Highlights
 Significant number of targets outlined, most targets open in two directions:
– Boss Extension: 15 targets outlined,
– Crystal Pass: 17 targets outlined;
 Diamond drill program planned to test recently identified targets.
Boxxer’s President and CEO, Elmer B. Stewart, explained, “The results from the Quantec Survey are the single most significant set of data generated from our Boss and Crystal Pass projects in the last 18 months. The number of new targets has moved Boxxer a major step closer to proving the porphyry potential for this district. The large TITAN-24 DCIP and MT
targets coincide with previously identified zones that display conductivity at depth, interpreted intrusives and mineralized skarn, all resulting in the generation of numerous very high quality diamond drilling targets at Boss and Crystal Pass. We are encouraged by the dimensions of the chargeability and resistivity responses in the new target areas interpreted to contain
porphyry copper style mineralization as this is consistent with the porphyry copper model being used by Boxxer to explore the Goodsprings Mining District.”
A total of three high priority targets (high chargeability and conductivity), six moderately-high priority targets (high chargeability and moderate conductivity), 15 moderate priority (high chargeability and resistivity), six moderate-low priority targets (shallow or deep conductivity) and two low priority targets were located over the Boss and Crystal Pass areas. Please see press release dated March 16, 2010, for the parameters of the Quantec Survey.

Results of the 2D inversion of the IP using Null reference data along line L1 (on the top)

Results of the 2D inversion of the MT data along line L1 Boss area (on the bottom)


Rock property database

Posted by on Thursday, 18 March, 2010

In this 2010 year the program Targeted Geoscience Initiative (TGI-3) is finishing. The Government of Canada committed $25M over five years to extend the mission of the Targeted Geoscience Initiative Program with a focus on base metal reserves in established mining communities. And through the TGI-3 program, additional petrophysical data will be added to the database for the TGI study areas (Southern B.C., Cantral Manitoba-Saskatchewan, Central Newfoundland, Abitibi, Ontario-Quebec, Bathurst, N.B.).

The National Rock Properties Database (NRPD) has been in development since 1998 and was initiated through a partnership between Noranda, Falconbridge, the Geological Survey of Canada, Quantec Geoscience Ltd, and Mira Geoscience Ltd. The result of the original development was a fairly complete data model and interface for the maintenance and query of rock property data collected using wireline geophysical methods. Through a partnership between McMaster University, MIRA Geoscience, and the GSC through the CAMIRO Project in 2004-05, the NRPD data model was extended to include rock property data measured on rock samples, definitions of universal lithology and alteration classifications for geological description.

The NRPD resides in an Oracle database. The database currently contains over 5 million rock property data records. Key parameters of each dataset include location coordinates, so that data can be queried by region, as well as geological attributes. The parameters currently available for query are Caliper, Conductivity, Density, Gamma, IP, Magnetic Susceptibility, Neutron porosity, Potassium, Resistivity, Self potential, Self potential gradient, Uranium, Temperature gradient, Temperature, Thorium and Acoustic velocity.

Source: http://ess.nrcan.gc.ca