Posts Tagged magnetic

Airborne Geophysical Survey of Coxheath Property

Posted by AP on Saturday, 21 August, 2010

Silvore Fox Minerals Corp. reports that it has entered into a contract with Aeroquest International Ltd. (“Aeroquest”) to conduct a comprehensive airborne geophysical survey over the Corporation’s flagship Coxheath copper porphyry property in Nova Scotia, Canada. Aeroquest will fly a 462 line-kilometre survey of high resolution Aero TEM IV MAG-TDEM and Radiometrics over areas of interest encompassing the Corporation’s mineral claims at Coxheath.

In addition, the Corporation has also contracted CGI Controlled Geophysics Inc. (“CGI”) to manage this airborne program on behalf of the Corporation. CGI has extensive experience with modern geophysical techniques, data processing, project management and geophysical interpretation.

This phase of the exploration program, as per the Corporation’s Press Release dated May 28th, 2010, is designed to provide new geoscientific information to help further the understanding of the mineral potential of the property. The results of the survey will aid in delineating the potential size and scope of the property’s structural framework and associated copper, gold, silver and molybdenum mineralization. In addition, the survey will provide important information on highly prospective and underexplored areas of the property, including the newly expanded, contiguous mineral rights. Follow-up field-work will focus on ground-truthing the results of this survey and the integrated data will be applied to develop a diamond drilling program that is anticipated to begin in September 2010. The details of the diamond drill program will be released at a later date.

“I am optimistic that the results of this survey will greatly advance our understanding of the geology and mineralization at Coxheath,” states Harry Cabrita, President and CEO. ”It will further enhance the efficiency of the exploration program that will have the assessment of economic significance as its primary objective.”


Ultra-high resolution magnetic survey for kimberlites

Posted by AP on Friday, 13 August, 2010

Shear Minerals Ltd. today announced the discovery of the new high interest SAZ kimberlite float and the commencement of the $500,000 exploration program at the Chesterfield Inlet Diamond Project, Nunavut in partnership with Rio Tinto Exploration Canada Inc. (“Rio”) and Stornoway Diamond Corporation.

Already completed this year is a 2,346 line km ultra-high resolution airborne magnetic geophysical survey over two priority blocks by Aeroquest.  A total of 33 priority targets have been chosen as large tonnage kimberlite targets.  A 10-person experienced crew is currently at the Josephine Lake Camp and will follow up targeted anomalies on the ground. A total of 7-10 high priority targets will be tested using a lightweight reverse circulation percussion drill (tests one target per day).

“The goal for this project in 2010 is to discover new kimberlites with large tonnage potential. The discovery of the new SAZ kimberlite float suggests the presence of high diamond potential kimberlites in the Chesterfield area,” said Pamela Strand, President and CEO of Shear Minerals Ltd. “With drilling now underway we hope to quickly confirm whether a target is a high diamond potential kimberlite to warrant further follow-up.”

SAZ Kimberlite Float
The SAZ kimberlite float was discovered by prospecting in a series of nine frost boils within a 65m area. The kimberlite fragments are weakly magnetic, angular and are believed to be proximal to the source. Visually the kimberlite is described as being ‘typical’ of the high diamond potential kimberlites at Churchill (“Type B”) with large olivine macrocrysts, green-blue phlogopite and visible pyrope garnets.  Samples have been collected for diamond analysis by way of caustic fusion as well as petrography. Plans are to review the geophysics with continued prospecting in this immediate area.

About the Project and Shear Minerals
The Project comprises a group of 35 mineral claims (70,000 acres) located within and near the North Corridor of the larger Churchill Diamond Project.  The Project area is located approximately 15 km north of the Josephine River Corridor.  This area covers the North Corridor, an indicator mineral dispersion area based on till samples from 2003-2006 having high count probe-confirmed kimberlitic indicator minerals including pyrope garnet, eclogitic garnet, chrome diopside, ilmenite and chromite.


PEREGRINE’s new discovery

Posted by AP on Sunday, 8 August, 2010

Peregrine Diamonds Ltd. reports the discovery of two new kimberlites, named Q1 and Q2, by prospecting on the Company’s 854,000 hectare Qilaq project (“Qilaq” or “the Project”) on Baffin Island, Nunavut, Canada. Qilaq is located on Hall Peninsula, northeast of Iqaluit, the capital of Nunavut, and is adjacent to Peregrine’s Chidliak project (“Chidliak”) where, as reported in a news release on August 4, 2010, the Company has discovered 32 kimberlites in the past two years.

In the spring of this year, Peregrine conducted a 670 line-kilometre helicopter airborne geophysical survey on what represents less than 2% of Qilaq’s area. The 12 geophysical anomalies that were found from this limited survey were prospected and will be prioritized for ground geophysics to be followed by drilling next year. A larger airborne geophysical survey is also being planned for next spring.

Mr. Eric Friedland, Peregrine’s CEO stated “The recent discovery of two kimberlites at surface at Qilaq by prospecting shows that the kimberlite district we have discovered on south Baffin Island continues to expand substantially in area and that this region has excellent potential to host another Canadian diamond mine. Our targeting and exploration methods are producing new kimberlite discoveries at a very rapid pace in Nunavut, and we look forward to more discoveries at Qilaq in the near future. The fact that Qilaq is wholly-owned by Peregrine is especially exciting for our shareholders as it allows us to benefit fully from the value that could result from the potential development of the Project.”

Q1 KIMBERLITE

The spring 2010 helicopter-borne magnetic/electromagnetic geophysical survey revealed a magnetic high anomaly with an estimated diameter of 150 metres associated with a topographic depression that measures approximately 60 metres by 50 metres. Subsequent prospecting led to the discovery of the Q1 kimberlite, represented by large concentrations of coarse-grained KIMs, and kimberlite cobbles and boulders on the surface. Both magmatic kimberlite and probable weathered kimberlite breccia boulders were identified. Pyrope garnet, picroilmenite and chrome diopside grains over 10 millimetres in size were observed on the surface. Clasts of limestone, shale and sandstone, interpreted to have weathered from the kimberlite, are also present on the surface.

Q2 KIMBERLITE

The Q2 kimberlite is located approximately four kilometres south of the Q1 kimberlite and outside of the 2010 airborne geophysical survey. Q2 was discovered through the identification of kimberlite boulders by a field crew that was collecting a follow-up till sample. Subsequent prospecting led to the discovery of two kimberlite outcrops within a surface depression that is more than 80 metres in diameter. At least two phases of kimberlite were identified. One phase is described as being magmatic without limestone xenoliths and the other phase has coarser grained olivine and KIMs and contains limestone xenoliths. Both phases contain olivine, picroilmenite, pyrope garnet and chrome diopside macrocrysts.

Samples from the Q1 and Q2 kimberlites are being sent to the Saskatchewan Research Council for diamond analysis by caustic fusion and results will be reported as they become available. If the diamond results are positive, Q1 and Q2 will be scheduled for drilling as early as possible next year. An exploration summary showing the two new kimberlite discoveries is available athttp://www.pdiam.com/i/pdf/qilaq632.pdf.

QILAQ EXPLORATION UPDATE

Over 300 follow-up sediment samples, related to the seven KIM anomalies identified in 2009, are currently being collected in addition to the prospecting of anomalies revealed from the 2010 airborne geophysical survey in anticipation of a drilling program that is being planned for the next field season. Follow-up geochemical and rock sampling, prospecting and mapping related to precious metals anomalies identified in 2009 is also underway this field season.


Exploration Update on Key Lake SW Uranium Project in the Athabasca

Posted by AP on Tuesday, 6 July, 2010

Kirrin Resources Inc. today announced the completion of a 1,076 line-kilometre magnetic-electromagnetic (EM) airborne survey of the Key Lake Southwest (‘Key Lake SW’) uranium property located on the southeastern margin of the Athabasca Basin in Saskatchewan, Canada. Fugro Airborne Surveys Corp. of Ottawa, Ontario (‘Fugro’) was contracted to complete the survey. In addition, a review of the technical disclosures following the January 10, 2010 announcements by Delta Uranium Inc. (‘Delta’) and Denison Mines Corp. (‘Denison’) of the expansion of their Phoenix Discovery, just 60 km from Key Lake SW, has revealed many geological similarities between Phoenix and Key Lake SW.

Kirrin’s airborne magnetic-EM survey at Key Lake SW utilised Fugro’s fixed-wing Tempest(R) Digital Time Domain Electromagnetic (DTDEM) system which provides maximum quantitative discrimination of relatively near surface (upper 200 to 300 m) conductivity variations. Kirrin has appointed Condor Consulting, Inc. of Lakewood, Colorado,  to undertake the processing and analysis of the airborne EM and magnetic data acquired by Kirrin. Condor anticipates submitting its report by July.

On January 10, 2010, Delta and Denison reported that high-grade uranium mineralization continues to be encountered on the Phoenix discovery on the Wheeler River Property located in the Athabasca Basin of northern Saskatchewan, and that the results of the fall 2009 drilling program have confirmed that the Phoenix discovery has the potential to host an economically significant, high-grade uranium deposit.

The Key Lake SW property is at the southwest end of the geologically favourable trend that hosts numerous uranium mines and important deposits, including the Phoenix and Millennium deposits, and the former Key Lake mine. Although the Key Lake SW property is believed to be somewhat southwest of the margin of the current Athabasca Basin, there is evidence (regolith encountered in some old drill holes) that indicates the Athabasca Supergroup-Wollaston Group basement unconformity was not far above the present ground surface within the property. Discovery of several ‘Ingress style’ uranium deposits, such as Phoenix (up to 117 m below unconformity), Millennium (up to 100 m below unconformity), Eagle Point (up to 450 m below the unconformity) and some other deposits within the Athabasca Basin, indicate that important uranium deposits can occur from several tens of metres up to a few hundred metres below the unconformity. Hence, there is potential for important basement-hosted uranium deposits to exist within the Key Lake SW property. Regional aeromagnetic data show the Phoenix discovery is associated with a fault which cross-cuts the P2 Rift Fault.

Important features at the Phoenix basement-hosted uranium discovery which are similar to the geological setting at the Key Lake SW property include the geological composition of the host basement rocks, the spatial association with the projected regional P2 fault, and the localization of the Phoenix uranium prospect on cross-cutting faults. Gracie (2009) has postulated that the Key Lake SW property is along the projected extension of both the P2 fault, which extends southerly from the McArthur River mine, and the Key Lake fault, which extends southwesterly from the former Key Lake mine.

The eastern margin of the Athabasca Basin is home to the most productive uranium mines in the world with roughly 25% of the world’s uranium production coming from this area. Kirrin’s target at Key Lake SW is basement-hosted unconformity-type uranium deposits, similar to Cameco’s basement-hosted Millennium deposit, located about 50 km to the northeast; the Phoenix discovery, located about 60 km northeast; and the former Key Lake mine, located about 35 km east-northeast.


Detail High Resolution Aero-magnetics, Horizontal Gradiometer, Radiometrics and XDS/VLF-EM for Creso

Posted by AP on Thursday, 1 July, 2010

Creso Exploration Inc. announces the award of a 5000 meter drilling program on the Shining Tree properties that will start this week including deepening by a further 300 m the Minto Hole #2 (18.2 g/t Au over 65.7 meters from 49.3 m to 115 m and 4.61 g/t Au over 79.6 meters from 132.4 m to 212 m – see) in order to do more down-hole geophysics and better delineate the gold bearing zone. Concurrently, Creso will initiate a detailed helicopter survey at 30m line spacing that will focus primarily on the Minto, Matona, Tyranite and Duggan Zones to outline known gold mineralization areas.

Creso has signed two airborne geophysical contracts with Terraquest Ltd both of which will start in July. The helicopter survey which will include Single Sensor High Resolution Aero-magnetics, Radiometrics and XDS/VLF-EM systems is based on 1779 line kilometers to be flown at low altitude with a 30m line spacing. The fix-wing aircraft will survey the entire eastern half of the Shining Tree properties covering large areas of the Tyrrell, Knight and Milner Townships survey and will include High Resolution Aero-magnetics, Horizontal Gradiometer, Radiometrics and XDS/VLF-EM systems over 5853 line kilometers at a 100m line spacing.

The combination of these two surveys is particularly well adapted to the Shining Tree Area where contrasts in hydrothermal alteration, mineralized volcanic and intrusive rocks, and complex structural features are common. Radiometric surveys will aid in delineating potassium enriched alteration zones commonly associated with gold mineralization in the area.


HEM and Mag Survey at Mines Point Gold Project

Posted by AP on Wednesday, 30 June, 2010

Kodiak Exploration Limited announces the
commencement of a helicopter EM and Magnetics survey at its Mine Point Gold Project in Manitoba.
The survey will cover a 140 square kilometre area in the central portion of the Mines Point target area
focusing on tightly folded Archean banded iron formation (BIF) adjacent to a regional scale shear zone.
Previous wide-spaced airborne mag surveys had identified five priority target areas; the current HEM
program will be flown with a tight line spacing (75 metres) in order to constrain the target areas prior to
ground exploration. The survey is expected to be completed by mid-July with follow-up work to
commence once the data has been received and interpreted.
The Mines Point Gold Project is located within the Archean God’s Lake – Sachigo Volcanic Belt in north
central Manitoba about 35 kilometres north of Oxford House. The 432 square kilometre property covers a
40 kilometre long trend of prospective Archean BIF. Several significant gold deposits with resources in
excess of 1.5M ounces have been discovered in the area in a similar geological setting: Monument Bay,
Stull Lake and Oxford Lake. These deposits and the Mines Point Project geologically resemble the large
multi-million ounce gold deposits at Lupin, NWT, Musselwhite, Ontario and Casa Berardi, Quebec. BIFhosted
gold deposits are attractive exploration targets due to the consistency and continuity of gold grades
and the lateral persistence of the host rock, potentially generating large volume gold deposits.

Results of Dog Lake Geophysical Survey

Posted by AP on Saturday, 26 June, 2010

Auric Mining Corp. announces the results of an Airborne magnetic and VLF-EM Survey conducted for the company by Terraquest Ltd. of Markham Ontario. Terraquest Ltd. was contracted to perform a VLF Electromagnetic survey of the Company’s property in the Dog Lake area of Northern Ontario.

The survey confirmed a number of gold showings on the shoreline of Dog Lake, located a few hundred meters to the west of the property boundary. In the past there has been considerable ground geophysics and drilling conducted in this area. The magnetic maps show the presence of narrow magnetic linear features striking from a North to East trend and appear to occupy all of the three major rock types. At least ten diabase dykes have been interpreted from the second derivative pattern and almost all are certain to belong to the Matachewn-Hearts swarm that is prevalent in the area. In the southeast corner a lateral displacement of three dykes are interpreted as a fault.

One of the more significant features of the magnetic maps is the presence of narrow magnetic linear features striking from North to East. These are illustrated on the interpretation maps and appear to occupy all three major rock types. The OGS map shows several major faults or deformation zones in the general area and with the same strike direction. It is proposed that these magnetic linears could be related to them. They could represent fracture elements in a broad deformation zone and since they stretch into the gold showings to the west are of considerable interest now as possible channels of mineralization.

Based on the conclusions and recommendations of the VLF-EM survey, possible new exploration targets have been identified and further exploration recommended. An exploration program has been adopted and will be carried out in the coming months.

Auric Mining Corp. plans to do another similar survey in the near future using additional technology to better define these results before a full field exploration program commences this summer.

  • Previous exploration in the Wawa has discovered numerous deposits of small diamonds within metamorphosed Archean basement rocks.
  • Dianor has discovered rocks with encouraging grades and stone size distribution directly south of the Mori-Metalex ground.
  • Island Gold Mine has Proven and Probable Reserves of 1,013,854 tonnes at a grade of 8.55 g/t gold for a total of 278,711 ounces of gold (NI 43-101 compliant report by GENIVAR) Project has additional Measured and Indicated Resources 454,705 tonnes at a grade of 10.26 g/t for a total of 149,972 ounces (NI 43-101 compliant report by GENIVAR).

10.50 metres of 7.47 g/t Gold on Goliath Project

Posted by AP on Monday, 21 June, 2010

The Goliath Gold Project is located in the Kenora Mining District in northwestern Ontario, 20 km east of the City of Dryden and 325 km northwest of the port City of Thunder Bay.

Treasury Metals began its 2009 exploration program in early June and this year’s exploration program will consist of a combination of surface exploration and diamond drilling programs. The Company is planning to carry out property-wide surface exploration, which will include developing drill targets along strike to the west and northeast of the Thunder Lake Gold Deposit. The surface program will also use the Company’s extensive historical database and more recent data from its ground and airborne geophysical surveys to target other areas on the ~44 km2 property.

Historical reports describe alteration and anomalous gold concentrations in several areas on the Company’s property that are off trend from the Thunder Lake Gold Deposit.

In conjunction with the surface program, the Company is planning diamond drilling aimed at increasing and upgrading mineral resources within the area of the current resource and along strike and testing exploration targets defined from the surface exploration program.

Treasury Metals has completed the following exploration work on the Goliath Gold Project as of the end of December, 2009:

  • 2,165 line kilometres of high-resolution airborne magnetometer survey over the entire project area.
  • 146.36 line kilometres of surface geophysics (induced-polarization) focusing on the area of the Thunder Lake Deposit.

Treasury Metals Inc.  announces further high-grade gold assay results from its recently completed +5,000 metre diamond drilling program targeting and defining high-grade gold structures on its Goliath Gold Project. The 100% owned Goliath Gold Project is located alongside the Trans-Canada Highway about 20 kilometres east of the City of Dryden, Ontario.

These latest results are from drill holes that were designed to further test and delineate two separate, high-grade gold structures located in the east and west regions of the Thunder Lake gold deposit. Drilling on the eastern structure returned multiple intersections of >6.0 g/t Au. Of note is drill hole TL10-98 that intersected 10.50 metres of 7.47 g/t Au, including 1.50 metres of 20.79 g/t Au, confirming the high-grade nature of this deposit. Further drilling is required to delineate these high-grade structures and the areas of lower grade gold between these structures. Previous drilling has confirmed vertical continuity of high-grade gold-bearing structures to depths of more than 800 metres. The Thunder Lake gold deposit is open at depth and along strike to the west and northeast.

Treasury contracted JVX Ltd. to complete a spectral induced polarisation (IP/Res) survey at theProject in March 2008. The survey coverage totalled 23 line-km over 230 ha, covering theThunder Lake deposit and extending towards the west and south (Figure 10-5). The surveyinstrumentation consisted of a Scintrex IPC-7 (2.5 kW) transmitter and Scintrex IPR-12 receivers.This receiver system allows operators to access each reading independently and makeadjustments when necessary to ensure that the chargeability data is repeatable and that thespectral parameters are calculated properly.The survey employed the pole-dipole array method, which varies slightly from the dipole-dipolearray. The pole-dipole method begins with a current separation of 25 m and increases in spacingwhich results in higher currents in later dipoles, lowering the recorded noise. However the IPresponse is asymmetric. The array orientation must be taken into account during interpretation.The array separation collection ran from 1 to 8 (n=1 to 8). Although “deep cuts” (a=25 m, n=9 to16) were planned to image depths of 300 m to 400 m, time and weather constraints did not allowfor the data collection. The survey detected extensive conductive surficial overburden, with 43% of the survey area at 250 Ωm or less. Conductive overburden can mask chargeable bodies, and thus a large volume of ore or high volume percentage of metallic sulphides must be present to overcome this problem. However, JVX noted that despite the conductive overburden responses detected, the overburden conductivity was not as high as initially anticipated (JVX, 2008).

“Discovering tomorrow’s metals today”

Posted by AP on Wednesday, 16 June, 2010

Argentex discovers new silver-gold zone at Pinguino, Tranquilo Trend returns 6.40 meters of 486.6 g/t silver and 1.91 g/t gold!

Argentex Mining Corporation provides an update on ongoing diamond drilling and exploration activities at its wholly owned 10,000-hectare Pinguino property in the silver-gold district of Santa Cruz, Patagonia, Argentina.

As part of the ongoing drill program at Pinguino, Argentex drill tested structures that lay along the Tranquilo Trend, a major northwest regional feature crosscutting the Pinguino property. Within it, Argentex has discovered a completely new mineralized structure (Luna vein) containing wide intervals of high-grade silver mineralization with associated gold values. The new mineralized structure returned results including 6.40 meters of 486.6 grams per tonne (g/t) silver and 1.91 grams per tonne (g/t) gold.

The Luna vein is known to extend for 920 meters along strike and is currently the subject of follow-up drilling with the goal of defining and expanding the high-grade mineralization. Drilling also tested structures along the Marta Trend, which contains the high-grade silver Marta Norte vein.

“We are excited to have discovered mineralization in the very first holes drilled into the Tranquilo Trend, which crosscuts 11 kilometers of the Pinguino property.  Not only is the structure mineralized along a considerable length, it also contains wide intervals of high-grade silver-gold mineralization such as we have intersected in the Luna vein,” said Ken Hicks, President of Argentex.  “The Luna discovery is a great incentive to increase our exploration efforts in interpreting the local geology and targeting high-grade silver-gold mineralization along the Tranquilo Trend.  We expect that this new discovery within a major property-scale structure could provide a significant boost to Pinguino’s overall precious metal potential.”

With more than 74 line kilometers of veins discovered to date, the Pinguino property is host to the largest known undeveloped vein system in Santa Cruz province after the developed AngloGold Ashanti Cerro Vanguardia mine. Both vein systems fall within the Tranquilo regional fault, a major northwest structural corridor in central Santa Cruz. To date, Argentex has drilled 333 holes at Pinguino for a total of 33,559 meters.


Success of Creso Exploration Program

Posted by AP on Thursday, 10 June, 2010

In May 2010, Borehole Induced Polarization (BHIP) surveys were done on the Tyranite and Minto properties. Results from the Tyranite hole are not yet available. 3D conductivity and chargeability models from boreholes gradient IP data have been calculated for holes M-0901 and M-0902 on the Minto property.

The Corporation has completed down-hole geophysical testing on the MacMurchy property and intersected 7.4% nickel and 2 g/t platinum and palladium over one meter in hole D6-07 confirming the nickel potential of the area. The MacMurchy property is located in the southwest corner of the MacMurchy Township some 10 km SSW of the Minto property.

Creso Exploration is currently evaluating bids for an agreement for a 200-kilometer low level airborne (Mag, VLFEM, and radiometric) geophysical survey to cover the Minto, Tyranite and Duggan zone on a 30-metre spacing in order to define geological structures and mineralized zones. Upon completion of the geophysical survey, the Corporation will undertake a 5000-meter drill program on the Minto, Tyranite and Duggan properties.

Samples were assayed at the facilities of Swastika Laboratories of Kirkland Lake (Swastika, Ontario) a certified and accredited laboratory by a standard fire assay method. All samples with greater than 1.0 g/t Au were re-assayed by a pulp and metallics method. Above interval values are weighted averages.

Creso announces drill results from the MINTO Project located half-way between Timmins and Sudbury in Ontario - 65.7 Meters of 18.2 g/t g and 79.6 Meters of 4.61 g/t Gold in Hole #2.

The Minto showing consists of a pod of carbonate sulphide breccias containing an estimated tonnage of 225,000 tons (204,000 t) grading 0.2 oz per t (6.8 g/t) Au to a vertical depth of 225m as determined and reported in 1984 by Duncan Gold Resources, (White 2007) **. Gold is related to pyrite and quartz veining trending north south and northeast southwest.