Posts Tagged Fugro

An unidentified flying object?

Posted by on Tuesday, 27 March, 2012
FacebookTwitterGoogle+Share

Helicopter surveying for company, but no one knows who

Buchans (Newfoundland, Canada) residents have been witnessing strange flying objects over their town this past month.

Last week, helicopters were seen hovering over the town, with objects suspended below – one horizontal in shape, the other a circle.

One might think it had something to do with mineral exploration, and they would be right.

But which company? Buchans Mayor Derm Corbett, who is regularly updated on mining activities in the region, said he had no idea who the mystery company or companies could be.

“The only company that I know that was doing geophysics in the Buchans area is the Buchans Minerals Corporation,” he said. “That’s the only group I’m aware of.”

But Paul Moore, the vice-president of exploration for Buchans Minerals, said it wasn’t his company, or SG Spirit Gold, the firm that it is engaging with.

He said people with Buchans Minerals have seen a surveying helicopter, but he did not know what company it was.

Another exploration firm, Messina Minerals, is active in the central region 48 kilometres southwest of Teck’s Duck Pond mine. Results the company announced on March 13, from its Main Zone project featured an estimate which includes indicated resources of 70 million pounds of zinc, 14 million pounds of lead, 8.7 million pounds of copper, 640,000 ounces silver and 7,500 ounces gold.

“I don’t know who the company could be in Buchans,” said Messina President Peter Tallman. “Messina isn’t doing geophysics.”

According to Merv Stacey, owner/operator of Red Ochre Inn in Buchans, two surveying companies are in town with the machines, including Geotech Ltd. of Aurora, Ontario, and Fugro Airborne Surveys.

Anyone familiar with geophysical surveying would guess that the objects were used for collecting data, and they would be right. They are magnetic gradiometers for taking readings where the presence of specific elements can be identified.

According to the website of Fugro Airborne Surveys, which carries out the process for a variety of mining and exploration companies, an element such as gold, which despite being highly conductive (in relation to electricity), vein type gold does not occur in sufficient concentration to be detected directly with airborne geophysics. However, the effects of the geological processes which result in gold deposition are often detectable.

Geotech Ltd of Aurora, Ontario is currently carrying out a geophysical survey over the Buchans area, said Buchans correspondent for the Advertiser, Pauline Dean.

“The magnetic gradiometer which hangs from the helicopter is approximately 1,000 lb and the largest part measures 26 metres in diameter and can take readings to a depth of 700 meters,” she said.

However, the person she spoke to from Geotech would not identify their client. Stacey said that was the same thing with the Fugro employees, who would not say the name of the company that contracted them to conduct the survey in Buchans.

Peter Tallman, the Messina president, speculated that a company may be interested in a property, but isn’t allowed to start work until the Exchange (whatever stock market they are listed on) regulation services grants regulatory approval.

Published on March 26, 2012
Sue Hickey & Terry Roberts

Airborne Mag-EM results for BC Homestake Ridge Property

Posted by on Wednesday, 22 February, 2012

Bravo Gold Corp. has received final results from the 2011 airborne DIGHEM geophysical survey on its 596 square-kilometre Kinskuch project located adjacent to, and southeast of its own Homestake Ridge project in northwest British Columbia.

The survey, which used Fugro’s DighemV-DSP electromagnetic system, totaled 3,821 line-kilometres flown at a nominal 100 metre spacing, which included 364 line-kilometres of tie lines at 1,000 metre spacing, and was completed from August 1st to September 14th, 2011.

The survey coverd about 60 percent of the total project area, was completed from the company’s base of operations at Alice Arm at the southern margin of the survey block.

The goals of the survey were met, the company said, with the data allowing for the mapping and delineation of controlling gold structures, as well as the identification of areas with anomalous conductivity, which suggest the presence of sulphide mineralization.

Bravo said several zones of anomalous conductivity have been identified within key target areas throughout the project.

The Illiance River trend, which was a target of the company’s 2011 exploration efforts, showed up in the survey as both a broad magnetic low and an electro-magnetic high (conductive zone suggesting the presence of sulphides) extending over a five kilometre strike length of strongly altered volcanic stratigraphy – an important host at the nearby Homestake Ridge project.

The target in this area is high-grade silver-enriched polymetallic mineralization within a series of sub-vertical structures occurring along the altered trend. Only a 2.5 kilometre strike length of this geophysical trend was mapped and sampled by Bravo during 2011, it said.

Bravo also completed four drill holes within the Illiance River trend in 2011, three of which returned what it called “encouraging” assay results including a 2.8 metre interval averaging 318 grams per tonne (g/t) silver, 0.4g/t gold, 2.2% lead and 6.5% zinc from drill hole KN11-02; and a 3.9 metre interval averaging 268 g/t silver, 0.2g/t gold, 3.4% lead and 6.5% zinc from drill hole KN11-03.

The holes were drilled from two set-ups, 500 metres apart. Mineralization remains open at depth and to the north and south, Bravo added.

The company also said that a program of geological prospecting, sampling and ground geophysics is being recommended to further delineate the conductive zones and to identify disseminated sulphides, which could indicate anomalous silver and gold mineralization.

Follow-up exploration will be carried out within an expanded 2012 exploration program on the project, which is planned to include an “aggressive surface exploration program” and up to 10,000 metres of diamond drilling on the Illiance River trend, as well as other targets throughout the property.


Butler Project – Exploration Overview with Geophysics

Posted by on Tuesday, 14 February, 2012

MacDonald Mines Exploration Ltd. provides an exploration update in the mineral-rich Ring of Fire region of the James Bay Lowlands.

MacDonald began exploring in the Ring of Fire starting in 2003, shortly after the first volcanogenic massive sulphide (VMS) discovery at McFaulds Lake by Spider Resources and KWG Resources. The McFaulds VMS discovery is characterized by very high-grade intersections of VMS mineralization (McF-04-57 intersected 18.8 meters of 8.02% Copper (Cu), Mc-03-18 averaged 4.83% Zinc (Zn) over 25.75 meters) and at 250 meter-plus depths.

Exploration in the James Bay Lowlands is challenging due to the area being almost entirely a wetland. As a result, there is minimal outcrop, helicopter support is required and exploration time lines are longer. Over $18 million dollars has been spent to date on the Butler property and we have discovered six zones of multi-element mineralization with copper-zinc VMS systems, vandiferous titano-magnetite and magmatic nickel sulphide. This was accomplished through comprehensive exploration programs including geophysics, diamond drill holes and geochemistry.

Magnetic map (TF) of the Butler Property showing the location of identified multi-element, mineralized zones.

The lack of outcrop requires that a significant amount of attention and detail has to be paid to the geophysical techniques used in the area. Historically the programs focused on shallow targets; however down-hole surveys, ground magnetic and gravity surveys have indicated that the potential deposit(s) of interest lies deeper in the structural sequence.

A comprehensive suite of geophysical tools has applied at Butler:

Airborne EM, Magnetics & Gravity

  • 2004 VTEM – 2138.9 line kilometers of data were collected
  • 2008 VTEM – 1325.6 line kilometers of data were collected
  • 2010 AeroTEM IV – 261 line kilometers of data were collected
  • 2011 HeliGeoTEM – 261 line kilometers of data were collected
  • OGS/GSC Airborne Gravity Gradiometer

Surface EM

  • Butler 1 – 13 line kilometers of data were collected
  • Butler 3 – 39.3 line kilometers of data were collected
  • Butler 5 – 12.5 line kilometers of data were collected
  • Butler 3, 5, 6, and 7 – 30.17 line kilometers of data were collected

Surface Magnetics

  • 7 Ground Magnetic surveys completed in 2011 covering 81.1 line kilometers

Down hole EM

  • 64 diamond drill holes probed and modeled

The Company is currently enhancing the geophysical model to include the geochemistry data results. Collectively, all of the above geophysical results have consistently shown that an electrically conductive unit with magnetic properties and high density lies below those prospective zones.  These are the characteristics expected from a sulphide rich zone.

Magnetic map (TF) of the Butler 3 area showing the location of the EM target and magnetic susceptibility anomaly

MacDonald’s upcoming drill program will focus on the Butler property: Prior to drilling, the targets will first be refined using a deep penetrating geophysical method, similar to that used to detect the HudBay – Lalor deposit at Snow Lake, Manitoba.


Exploration at Limão Gold Project in Brazil

Posted by on Tuesday, 17 January, 2012
Amerix Precious Metals Corporation reports that incoming results from its 2011 exploration program have outlined anomalous gold targets defined from geochemical surveys  that have been conducted across several grids established on the Company’s 10,000 hectare Limão Gold Property, located in the Tapajós District, Pará State, Brazil.
Amerix contracted Fugro Aviation of Brazil for an airborne magnetic and radiometric survey over its property as reported in News Release NR 2011 – 09. TerraNotes Ltd Geophysics of Toronto provided additional interpretive consultation of the airborne data.  New grids, existing grid extensions and infill lines have been completed as a continuation of Amerix’s 2009 and 2010 geochemical surveys, as well as over new, prospective areas identified from the airborne geophysical data. The geochemical grids cover an area of approximately 7.7 square kilometres of the approximate 100 square kilometre Limão property.  Grids were primarily sampled using a manual auger to take 1 metre deep samples at 20 metre spacing along the grid lines. Secondary, closer spaced grid lines and sampling was done over areas with anomalous geochemical results. Each grid line was mapped and every sample was geologically logged and then prepared for shipping and analysis. All samples were prepared at Acme Labs preparation facility in Itaituba, Brazil and samples were shipped to Acme’s Santiago, Chile Laboratory for fire assay gold analysis. The Company utilizes a QA/QC chain of custody program overseen by its geologists concerning its samples. Over 3,700 samples were taken during the 2011 program covering 4 principal grid areas and the geochemical results are presently being received by the Company in batches.
Complete results have been received for the South Grid geochemical survey and these are presented in the accompanying Figure 2. The South Grid covers 0.6 square kilometres and was established primarily to cover an area of past, small scale, informal mining. Importantly, the 2011 geochemical survey identified a significant soil anomaly at the South Grid. The anomaly is defined by greater than 20 ppb gold traceable for 350 metres along a 290 degree trend that is coincident with the old workings.
Company geologists have identified quartz veining occurring along easterly to westerly oriented, sheared contacts within predominantly granitic host rocks as exposed in a shaft and a cut face at the – 2 – workings. Rock sampling and geologic mapping in the immediate vicinity of these workings and along the coincident gold geochemical anomaly will continue in the early 2012 exploration program. Amerix anticipates that this target will be developed for drill testing in the upcoming 2012 drill campaign. A second gold in soil anomaly occurs in the east section of this grid area. This anomaly extends for approximately 250 metres in an easterly to westerly direction and is open to the east. Additional geochemical and rock sampling will be undertaken to define the extensions of this target. Several other minor anomalies also occur on the South Grid and may be the subject of further detailed survey work.
Complete results from geochemical analyses for the  other three grids are expected later in the first quarter. The Company will provide these results as it prepares for drilling that is anticipated to begin after the rainy season and later in the spring. Amerix is well funded to complete its first drill campaign at the Limão project, located in the historically gold rich Tapajós district of Brazil.

Priority Targets in Blackwater Gold Area, BC

Posted by on Wednesday, 9 November, 2011

Greencastle Resources Ltd. provides an update on progress at its Nechako property located in the Blackwater gold camp approximately 100 kilometres southwest of Vanderhoof, central BC. Greencastle has an option agreement to acquire a 100% interest in the property, covering approximately 13,000 ha (28 claims), on the Nechako Plateau.

The property is located in the same general Blackwater area where, in 2010, Richfield Ventures Corp. discovered a significant bulk tonnage gold deposit. In June 2011, Richfield was acquired by New Gold Inc. (“New Gold”) for approximately $550 million. In a release dated September 16, 2011, New Gold estimated that, from drilling results to date, the discovery contained resources of some 6.6 million ounces of gold. On October 17, 2011, New Gold announced the acquisition of Silver Quest Resources Ltd. and Geo Minerals Ltd., further consolidating its position at Blackwater to the west and northwest. Greencastle’s Nechako property is geologically on trend to the north of New Gold’s Blackwater property.

A detailed heli-borne magnetic and EM geophysical survey has been completed by Fugro Airborne Surveys Corp. ) to define targets for follow-up exploration on the Company’s property. The airborne survey covered 1,487 line-kilometres, including tie lines. Flight lines were flown east-west with a line separation of 100 metres. The initial Fugro report has identified some 73 ‘high-priority’ AEM anomalies based on favourable structure, magnetic association, conductance, length, width, or depth extent, as well as several more extensive conductive zones. Although some of these could reflect sulphide-type targets, most are considered to be of lesser priority, given the non-conductive nature of the expected auriferous target mineralization at Blackwater.

Due to the complexity of interpreting this style of gold mineralization from geophysical data, Greencastle engaged the services of Intrepid Geophysics Ltd. (“Intrepid”) of North Vancouver, BC, to undertake a more detailed analysis of data collected by Fugro. This interpretation was based on an integrated analysis using a combination of GEOSOFT‘s integrated editors (spreadsheet and flight path), advanced Fourier filtering and multi-scale edge detection, ER MAPPER’s image enhancements and MAPINFO’s GIS capability. The Intrepid interpretation attempted to further discriminate these targets into a smaller grouping.


New geophysical data release for the Iditarod survey area

Posted by on Wednesday, 2 November, 2011

The Division of Geological & Geophysical Surveys (DGGS) on Nov. 3 will release airborne geophysical survey data and maps for about 850 square miles of the Innoko and Iditarod mining districts (Alaska) to help geoscientists decipher the complex geology of this highly prospective area. The Iditarod survey area is about 22 miles west of McGrath and 200 miles northwest of Anchorage, Alaska. DGGS believes the data will be useful for resource exploration, planning, and land-use management.

The Iditarod–Innoko mining districts have produced more than 2.3 million ounces of gold, with only 3,000 ounces of this production from lode sources. The headwaters of most placer-producing creeks in the area are in igneous rocks. The discovery of over 30 million ounces of gold associated with a Late Cretaceous dike swarm at the Donlin Creek deposit has helped keep mining activity high in the region. A minor part of the survey along the southeastern edge lies in the McGrath mining district.

The Iditarod survey ranges from the Ganes Creek area in the north, southwestward through Beaver Mountains to Camelback Mountain and then westward to just north of Flat. The region has been relatively underexplored. Airborne geophysics is a valuable tool for characterizing bedrock types, projecting geology between sparse outcrops, and identifying anomalous geologic signatures covered by vegetation that might be associated with lode mineralization. Funding for the Iditarod Survey was provided by the Alaska Legislature as part of the division’s Airborne Geophysical/Geological Mineral Inventory (AGGMI) program. Data for the survey were collected and processed in 2010 and 2011 by Fugro Airborne Surveys.

The electromagnetic and total-field aeromagnetic survey data will be released at 9 a.m. on Thursday, November 3, at the DGGS office in Fairbanks, and they are available in both digital form and as printed map sheets. Data will be downloadable from the division’s website http://www.dggs.alaska.gov at no charge. Electromagnetic-anomaly maps and an interpretive project report will be available at a later date.

DVDs and the individual map sheets are available for the cost of reproduction. They can be inspected and purchased at the division’s office at 3354 College Road, Fairbanks, Alaska 99709-3707. Call 907-451-5020 to place phone orders. Mail orders should be sent to the Fairbanks DGGS office at the above address or via fax (907-451-5050) or e-mail dggspubs@alaska.gov. The order form, with location map, will be available November 3 on the division’s website at www.dggs.alaska.gov/pubs/project-orderform/750. The digital data and map sheets will be downloadable at no charge through links on the order form beginning at 9:00 a.m. on Thursday, November 3.


Airborne Magnetic Survey in NWT for iron

Posted by on Saturday, 1 October, 2011

Coltstar Ventures Inc. provides an update on its Mackenzie Mountains exploration program. To date, the Company has completed an airborne magnetic survey and a field program over the entire property. Collectively, these exploration activities delineated numerous magnetic anomalies and identified iron formation at the northwestern and southeastern extremities of the property.

The Mackenzie Mountains Project

The Mackenzie Mountains Project is contiguous and adjacent to the Snake River (Crest) iron deposit, the 2nd largest undeveloped iron deposit in the world. The Crest iron deposit has been reported to host a historical resource estimate of 5.6 billion tonnes at 47.2% Fe and a reported “regional resource estimate” of 18.6 billion tonnes (Yukon MIN FILE # 106F 008). Coltstar notes that a qualified person has not done sufficient work to classify Chevron’s historical estimate at Crest as current mineral resources or mineral reserves and Coltstar is not treating this historical estimate as current mineral resources or mineral reserves.

The property covers a 170-kilometre belt underlain by both the Rapitan and Coates Lake Groups.

Airborne Magnetic Survey

During the month of July, Fugro Airborne Surveys flew a helicopter-borne magnetic survey over the Mackenzie Mountains property. The Fugro survey coverage consisted of approximately 4400 line kilometres, at 300-metre line spacing. The purpose of the survey was to detect zones of mineralization and acquire information that could be used to map the geology and structure of the survey area.

The aeromagnetic survey was a complete success. Numerous long magnetic anomalies were delineated. Importantly, the survey outlined two 10 kilometre-long anomalies, extending from drilled iron formation on Chevron’s Snake River (Crest) iron ore deposit immediately onto Coltstar’s ground to the south. From here, an almost continuous magnetic anomaly was delineated over the remaining length of the Mackenzie Mountains property.

Paterson, Grant and Watson (PGW), a firm of consulting geophysicists out of Toronto, conducted a structural and lithological interpretation of the airborne geophysical data acquired by Fugro. Preliminary analysis of the geophysical data led PGW to identify a number of anomalous areas for follow-up or more detailed exploration. These areas were defined on the basis of their higher magnetization relative to the very low background levels of non-magnetic sedimentary units.

These areas were divided into three categories, based on their relative magnetic signatures:

1. 114.6 km2 of iron-rich Rapitan formation, exposed or very close to the surface;

2. 416.9 km2 of iron-rich Rapitan formation, covered by sedimentary rock; and

3. 302.7 km2 of deeply buried iron-rich rocks.

Field Program – Mackenzie Mountains Iron Project

Aurora Geosciences Ltd. conducted a ground exploration program over the Mackenzie Mountains property consisting of geological mapping, ground magnetic and susceptibility measurements and the collection of chip and rock samples.

The goal of the field program, which focused primarily on claims in the immediate vicinity of Chevron’s Crest iron deposit, was to investigate the magnetic anomalies detected by the airborne geophysical survey and to confirm the presence of iron formation in areas mapped as Rapitan Group on Coltstar’s claims.

During the ground exploration program, iron formation was observed in a number of locations on Coltstar’s Mackenzie Mountains property. The field crew observed iron formation outcrops on Coltstar’s property south of Chevron’s Crest property (Zone A). This iron formation unit continues, at a shallow angle, on Coltstar’s property, until it is terminated by a thrust fault several kilometres away. The area of potential iron formation between the outcrop location and the contact with the fault is approximately 9 km2. A Chevron drill hole, located 375 metres north of the iron outcropping on these Coltstar claims, intersected 27.4 metres grading 43.1% soluble iron.

West of Zone A, iron formation exposed in a riverbed on Chevron’s property, is likely to extend, at a shallow angle, onto several of Coltstar’s claims (Zone B). Zones A and B, each 10 kilometres long, are spatially related to the magnetic anomalies delineated by the aeromagnetic survey. For a map, showing the locations of Zones A and B, please see www.coltstarventures.com .

Confirmation of Copper Prospectivity

On the last day of the field program, the geological crew found malachite-stained boulders in a talus field. This observation of malachite, a common oxidation product of copper mineralization, confirms the property’s copper prospectivity. It was not possible to access the likely outcrop source due to the steep terrain. The area where the malachite was observed is coincident with thickening of the Coates Lake Group on the Mackenzie Mountains property. This discovery warrants follow-up given its occurrence in a geological setting, which is similar to that which hosts the Nite, Keele and Coates Lake deposits further to the south.

Next Steps

A ground magnetic survey and measurements of magnetic susceptibility were made during the field program in order to characterize the magnetic signature of various rock units. The results of this work will assist in the modeling of the aeromagnetic results. The primary goal of the modeling is to outline the distribution of the iron formation throughout the property.


Airborne geophysics over the Symphony Property

Posted by on Thursday, 22 September, 2011

BonTerra Resources Inc. Fugro Airborne Surveys has commenced an aeroelectromagnetic survey over the entire Symphony Property (the “Property”). The Property is situated in the Omineca mining division approximately 29 kilometres southwest of Houston, British Columbia.  BonTerra recently staked additional claims to consolidate its land position situated in between the Silver Queen Mine to the south and the Silver Streak property to the north.

Directly bordering the Property to the south is the past producing Silver Queen Mine. Historical ore grades are 8.72 opt (299 grams / tonne) silver, 0.18 opt (6.17 g/t) gold, 6.73% zinc, 1.16% lead, and 0.47% copper.

The Silver Queen property is currently being advanced by New Nadina Explorations. New Nadina has intersected silver, gold and base metal mineralization on the property. They have completed an aeromagnetic and ZTEM survey, a titan geophysical survey and diamond drilling. Drilling revealed grades of up to 493.5 g/t silver, 5.06 g/t gold, 13.5% zinc, 6% lead and 2.88% copper. The mineralized trend has a general southeast to northwest trend, the direction towards which the Property is situated.

General Location Map:

http://www.bonterraresources.com/i/pdf/SymphLocationMap.pdf

The Silver Streak property is situated to the north of the Property. Trenching on the Silver Streak identified significant mineralization which included 1.99% Cu and 338 g/t Ag over 33 meters. An inclined diamond drill hole was drilled underneath this trench in 1991. A zone grading 8.8 meters of 0.49% copper and 258 g/t silver, within 21.1 meters averaging 0.27% copper and 127 g/t silver was discovered. Another trench excavated in 2002 graded 0.26% copper and 1.91 g/t Ag over 16.7 meters. The mineralized zone is believed to have a NW-SE strike, the general direction of the Property.

This DIGHEM Electromagnetic survey with optional Radiometrics will total 308 line kilometres of readings. DIGHEM records electromagnetic data which can be interpreted to show changes in bedrock geology to great depth. The system uses multiple frequency electromagnetic fields to measure and map electrical conductivity in three dimensions. The DIGHEM EM system provides the interpretation benefits that can only be realized by a system employing both horizontal coplanar and vertical coaxial transmitter-receiver coil-pairs. BonTerra has selected Fugro’s optional Radiometrics application for an effective geological mapping solution as part of this mineral exploration program. The Company plans on using this survey to identify additional targets of interest on the property in its evaluation for silver and base metal mineralization potential on the Property.


Geophysical prospecting in Southwest Greenland

Posted by on Tuesday, 30 August, 2011

North American Nickel Inc. (“NAN”) announces that it has commenced a field campaign to evaluate prospective areas within its 4,841 km2 exclusive mineral exploration licence. Electromagnetic anomalies, identified from a recent re-interpretation of a 1995 GeoTEM fixed wing survey, along with other areas of interest derived from compilation of previous work and satellite imagery will be ground checked in order to prioritize areas for helicopter borne time domain electromagnetic (TEM) surveying planned for September and October.

NAN plans to integrate the results from the field program with its existing database of historical work to optimize the upcoming helicopter borne TEM survey. The helicopter TEM system has much higher signal to noise ratios than the 1995 fixed wing survey and the helicopter can better maintain the required altitude above the ground to maximize the detection of geophysical signals from nickel-copper sulphide mineralization.

North American Nickel also controls a 4,841 square km Mineral Exploration Licence in southwest Greenland with exclusive mineral exploration rights. The principal target is high-grade nickel-copper occurrences associated with norite and other mafic and ultramafic intrusions.


Yukon: the successful PGM project

Posted by on Friday, 15 July, 2011

Yukon Wellgreen project promises to be one of the largest Platinum Group Metals projects in Canada.

Geotech Helicopter-borne Versatile Time Domain Electromagnetic (VTEM) and magnetic survey flown in 2007  provided a window to bedrock geology through overburden covered areas of the property while outlining several new areas of exploration interest. A Fugro helicopter-borne Mag and EM survey conducted in 2008 demonstrated that the magnetic signature of the peridotite extends approximately 6 km on Prophecy Platinum’s ground.

Prophecy Platinum Corp.  announces the receipt of an independent National Instrument (NI) 43-101 compliant report and mineral resource estimate for its Wellgreen PGE-Ni-Cu property located in the Yukon Territory, Canada.  The independent study incorporated drill data from 701 diamond drill holes (182 surface and 519 underground) totalling over 53,222 metres. Using a 0.4% NiEq (nickel equivalent) cut-off grade, the Wellgreen deposit now contains a total inferred resource of 289.2 million tonnes at an average grade of 0.53 g/t platinum, 0.42 g/t palladium, 0.23 g/t gold (1.18g/t PGM+Gold), 0.38% nickel, and 0.35% copper. Separately, the deposit also contains an indicated resource of 14.3 million tonnes at an average grade of 0.99 g/t platinum, 0.74 g/t palladium, 0.52 g/t gold (2.25 g/t PGM+Gold), 0.69% nickel, and 0.69% copper. The resource includes both the East Zone and the West Zone of the Wellgreen project.

Widespread nickel-copper-PGE mineralization on the property is related to a swarm of Triassic aged mafic-ultramafic sills that extend over a lateral distance of 4.5 km and a stratigraphic interval of at least 1.5 km. The sills are preferentially emplaced along the contact between Pennsylvanian to Permian Station Creek Formation volcanic rocks and Early Permian Hasen Creek Formation sedimentary rocks. The sills are thickest along a northerly trending ridge that bisects the central part of the property and this area may be near the intrusive centre.

Best grades of mineralization occur in the west part of the property where relatively thin but laterally extensive sills that are elsewhere dominated by peridotite give way to a greater proportion of gabbro. Mineralization consists of disseminated sulphides in gabbro, which to date have received little attention, and banded to massive sulphide mineralization along the sheared contact between gabbro and country rock. The banded to massive sulphides are enriched in the rare PGEs rhodium, osmium, iridium and ruthenium.


Airborne electromagnetic data and inversion models for two regions in Australia

Posted by on Sunday, 3 July, 2011

New airborne electromagnetic (AEM) data and inversion products have been released for the Frome Embayment area in South Australia. The data were acquired using the TEMPESTTM AEM system during 2010 and cover 95 450 square kilometres in 32 317 line kilometres. The survey primarily targeted potential uranium-bearing mineral systems in the Callabonna Sub-basin of the Frome Embayment and the Lake Eyre Basin on the flanks of the northern Flinders Ranges, continuing to Marree and Cameron Corner and included portions of the Curnamona Province and the northwest Murray Basin.

This data release includes new inversions using the Geoscience Australia layered earth inversion (GA-LEI) algorithm and data products, including point-located ASCII data and geo-located grids, sections and images.

The Phase 2 Frome Embayment TEMPESTTM AEM survey final inversion data and conductivity models will be available from 7 July 2011 as a free download.

New airborne electromagnetic (AEM) inversion products have been released for the Kombolgie VTEMTM AEM survey area in the Northern Territory. Data have been inverted using the layered Earth inversion algorithm software developed at Geoscience Australia.

The Pine Creek AEM Kombolgie survey covered a total of 8800 line kilometres over an area of 32 000 square kilometres and included mapping of subsurface geological features associated with unconformity-related, sandstone-hosted Westmoreland-type and Vein-type uranium mineralisation. The data are capable also of interpretation for other commodities including metals and potable water as well as for landscape evolution studies. The improved understanding of the regional geology to a depth of greater than 1500 metres resulting from the inversion results will be of considerable benefit to mining and mineral exploration companies.

The Phase 2 Kombolgie VTEM AEM survey final inversion data and conductivity models will be available from 7 July 2011 as a free download.


Completion Of Airborne Geophysical Survey In Northwestern British Columbia

Posted by on Thursday, 23 June, 2011

Romios Gold Resources Inc.  announces the completion of a 743 line-kilometre airborne geophysical survey over the Company’s wholly owned Dirk and Andrei properties in the Galore Creek area, Northwestern British Columbia. The geophysical survey employed Fugro Airborne’s “DIGHEM” system, measuring multiple frequency electromagnetic fields to produce high-resolution electromagnetic resistivity and magnetic anomaly maps of the top 150 metres of the earth’s crust. The DIGHEM system, in development and use for over 40 years, is widely used in the mining and exploration industry and has aided mineral exploration at other properties in the area such as Newmont Lake, Trek, Galore Creek, and Copper Canyon.

Preliminary results of the Fugro survey over the Dirk property suggest a coincidence between a broad, northeasterly striking magnetic anomaly of moderate intensity with a megacrystic syenite porphyry, similar to those found at Galore Creek. Surface mineralization on the Dirk property is reflected as geophysical anomalies exhibiting a high-magnetic, low-resistivity signature within and adjacent to a larger magnetic anomaly outlined in the Fugro Airborne Survey. Together, the broad magnetic anomaly and the anomalies reflecting surface mineralization, cover an area approximately 9.6 km long by 3.0 km wide. A 2010 mapping project from the British Columbia Geological Survey (BCGS) supported Romios’ contention that the Dirk property mineralization is analogous to and may be as large as the Galore Creek Project.

The Dirk and the recently staked Andrei property are described by the BCGS as holding the potential for VMS (volcanic massive sulphide) – related mineralization. Known silver, zinc, and copper- mineralization within rhyolite ash flows on the Andrei property are manifested in the Fugro surveys as geophysical anomalies which exhibit low to moderate resisivity and moderate magnetic signatures similar to those recorded over the National Instrument 43-101 Inferred Resource of the Northwest Zone on the Newmont Lake property.

A more comprehensive analysis of the Dirk and Andrei geophysical surveys will be conducted upon receipt of the completed and final results from Fugro Airborne Surveys. Maps of the preliminary results will be posted on Romios’ website.

The airborne geophysical survey is part of the $6+ million 2011 exploration program which also includes approximately 10,200 metres of diamond drilling on the Trek property, 1,200 metres on the Dirk property, and 400 metres on the Newmont Lake property.

Drilling commenced on June 2, 2011 on the Tangle and North Zones at the Trek Property. The first hole has been completed on the Tangle Zone and has encountered variable amounts of sulphide mineralization. This mineralization correlates well with the IP (induced polarization) and MT (magnetotelluric) anomalies identified in the 2010 Titan 24 Survey. Drilling on the second hole on the Tangle Zone is in progress.

Drilling has also commenced on the first hole of the 2011 season in the North Zone targeting the near surface mineralization and the deeper MT anomaly identified by the 2010 Titan Survey. All drilling results will be announced as soon as they are available.


Completion of Airborne Geophysics Survey at Key Lake for uranium

Posted by on Tuesday, 24 May, 2011

Kirrin Resources Inc.  announces the completion of a 1,531 line-kilometre helicopter-borne time-domain electromagnetic geophysical survey of the Key Lake Southwest (‘Key Lake SW’) uranium property located on the southeastern margin of the Athabasca Basin in Saskatchewan, Canada. The survey was flown using Geotech Ltd’s Versatile Time-Domain Electromagnetic (VTEM Plus) geophysical system.

Kirrin has appointed Savaria Geophysics Inc. of Toronto, Ontario, (‘Savaria’) to undertake integration of the prior Fugro airborne Tempest-magnetic survey completed in early 2010 (news release July 6, 2010) and interpretation of the aggregate data acquired by Kirrin. Savaria anticipates submitting its report by end June, following which Kirrin will commence a program of summer fieldwork with the objective of finalizing the selection of drill sites.
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.

Geology

The Key Lake SW property is at the southwest end of the geologically favourable trend that hosts numerous uranium mines and important deposits. Although the property is believed to be somewhat southwest of the margin of the current Athabasca Basin, regolith encountered in old drill holes 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 the unconformity), Millennium (up to 100 m below the unconformity), Eagle Point (up to 450 m below the unconformity) and other deposits within the Athabasca Basin, indicates 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.

The Key Lake SW property is underlain by Aphebian amphibole, pelitic-psammitic gneisses, iron formation and leucogranite. The Aphebian rocks lie on Archean felsic gneisses. The boundary between the Mudjatik and Wollaston Domains passes through the eastern part of the property. Most of the property lies west of this line. Although the sandstone does not cover any of the eight claims now, the assumption that it once did is reasonable. The unconformity uranium deposit model or a derivative should apply to all of the claims in the property. Basement hosted uranium mineralization discovered at Millennium, southwest of the McArthur mine and new zones in the Collins Bay Eagle mine emphasize the potential to discover a similar style of uranium mineralization on the property.

Kirrin explores for rare earth elements and uranium. In addition to its exploration activities, Kirrin seeks to enhance its capitalization and the quality of its portfolio through options and corporate development activity.



VTEM Survey on Prospective Uranium Properties in Athabasca Basin

Posted by on Saturday, 23 April, 2011

Unity Energy Corp. announces that it has engaged Geotech Ltd. to conduct a heliborne VTEM geophysical survey over its Close Lake, Lampin Lake and Hoppy Lake Projects in the northeastern Athabasca Basin. VTEM is highly effective at locating discrete conductive anomalies, magnetic features extending to the basement and mapping lateral and vertical variations in resistivity and is a leading edge solution for uranium exploration in the basin. VTEM is an evolving technology and this latest generation boasts a higher sensitivity, achieved by noise reduction and optimization of transmitter current waveform along with dipole moment increases. The low noise level significantly extends conductance aperture and conductance discrimination. The survey will comprise of ~1300 line kilometers with 100m spacing and is expected to be completed within two weeks.

The Company was very impressed at the capability and resolution of the VTEM survey, which in 2010 helped to define three high priority targets at Unity’s Waterbury Lake Project, which is just ~10km south of the Midwest Mine and Hathor’s Roughrider Project. The Company is also in the process of finalizing arrangements for a ground resistivity survey of targets at Waterbury, which should commence in the near term.

Close Lake Project, which is comprised of a singe mineral disposition covering an area of ~596 hectares, is ~10.6km northwest of the Cigar Lake mine. The Tucker NE conductivity trend, which lies immediately north of the CL Property, was delineated by a 1991 Comega (now Areva) ground EM survey and a 2004 MEGATEM Airborne EM & Magnetic Survey. The anomaly was interpreted as a series of 3 or more northeast parallel basement conductive anomalies, the most southerly of which (C-12A) lies ~170m from the northernmost boundary of Unity’s CL property.

The Lampin Lake Project consists of a single 500 hectare disposition located on the eastern margin of the Athabascabasin.  The Property is 3.7km southeast of Unity’s Waterbury Lake Property and is bordered by claims held by Dennison to the east (Hidden Bay Project) and Cameco Corporation on all other side.

From 2004-2006, Cameco tested the northeast trending Q12 EM conductor series with ground geophysics and diamond drilling. EM and gravity surveys allowed for the interpretation of the Q12 fault, as well as numerous cross faults that extend onto the Lampin Lake Property. In addition, a northeast resistivity high, extending for ~750m along the southeastern edge of the Lampin Lake Property was defined by EM inversions.

In September 2002, UEX Corporation and Cameco Corporation commissioned a fixed-wing triaxial gradiometer aeromagnetic survey to cover the entire Hidden Bay and Rabbit Lake properties. Goldak Airborne Surveys of Saskatoon, Saskatchewan was contracted to carry out the survey and a total of 6,816 line kilometres of data was collected along 200 metre spaced flight lines. The data collected from this survey was combined with a project-scale EM conductor map to facilitate a regional geological and structural interpretation. Emphasis was placed on identifying the principal geological units, the most prominent structural features, and the areas most prospective for finding uranium mineralization.

The Hoppy Lake Property covers an area of 1924 hectares and is ~10km southwest of the Cigar Lake Mine.

In 2007, Condor Consulting completed an interpretation report for Dejour Enterprises/Titan Uranium and identified a number of Target Zones deemed worthy of follow-up. The report describes the processing and analysis of several VTEM airborne electromagnetic and magnetic surveys carried out for Dejour by Geotech from September-October 2006. The object of the survey was to explore for unconformity style uranium mineralization of both the Simple (Low Rare Earth Elements, (REE) basement-hosted) and the Complex (High Rare Earth Elements, (REE) sandstone-hosted) types.


The new Potential Mineralized Structures at Depth in Buffalo Gulch and Deadwood Zones at Idaho Gold Project

Posted by on Monday, 28 March, 2011

Premium Exploration Inc. reports initial results of the Induced Polarization (IP) geophysical surveys conducted along the Buffalo Gulch and Deadwood Zones at its 100% owned Idaho Gold Project in north-central Idaho, USA. Results of the IP surveys in the Buffalo Gulch and Deadwood Zones reveal potential mineralized feeders at depth and indicate similar structural geometry to the Friday Fault located 15 km to the south, along which the Friday-Petsite inferred gold resource of 549,000 oz is located (15 Mt @ 1.1 g/t Au with 0.5 g/t Au cut-off).

IP Dipole-Dipole Highlights:

  • High chargeability/resistivity indicates a potentially mineralized structure from surface to 300m depth
  • Buffalo Gulch and Deadwood exhibit similar geologic model and westerly dipping structural orientation to Friday Zone mineralization
  • IP results correlate with airborne geophysics and gold-in-soil anomalies

“The IP anomalies display potentially mineralized structures at depth in the Buffalo Gulch and Deadwood Zones which will be drill tested in the 2011 Phase-4 drill program,” stated Mike Ostenson, VP Exploration of Premium Exploration. “This is very significant as the anomalies share similarities with the Friday-Petsite deposit where high-grade structurally controlled mineralization was discovered at depth. We have only scratched the surface of this project”s growth potential; it”s going to be an exciting and prospective year for our shareholders.”

For the associated maps, please click:

http://bit.ly/PEM_IP_Planview_OSZ_Airborne – IP Plan View along the OSZ & Airborne

http://bit.ly/PEM_IP_Planview_OSZ_Soils – IP Plan View along the OSZ & Gold-in-Soil

http://bit.ly/PEM_BG_IP_Section – Buffalo Gulch IP Section

http://bit.ly/PEM_DW_IP_Section – Deadwood IP Section

2010 Idaho Gold Project Geophysics Summary

During the 2010 field season, Premium Exploration acquired three different types of geophysical data at the Idaho Gold Project, including 114 line km ground magnetics, 30 km x 5 km Dighem Airborne, and 8.4 line km Dipole-Dipole Array Induced Polarization (IP) surveys.

Ground Magnetics

  • Ground magnetic surveys were done at the Buffalo Gulch, Deadwood, and Friday Zones. Advanced processing of the ground magnetic data provided high resolution of the fault systems. All surveys showed the presence of fault structures within each zone, confirming geophysics was an effective tool for identifying potential mineralized structures, culminating in the regional Airborne Survey.

Airborne Survey

  • The Dighem airborne survey EM data outlined the Orogrande Shear Zone (OSZ) as a 30 km conductive anomaly, delineated fault structures, and identified priority targets. These correlate with gold-in-soil anomalies and drill intercepts along the OSZ suggesting the various mineralized zones are a part of main mineralizing system.

Induced Polarization (IP)

  • Targets were followed up with three lines of induced polarization at the Buffalo Gulch Zone and three lines at the Deadwood Zone for a total of 8.4 km. The resistivity and chargeability results show prominent westerly dipping anomalies in both zones, similar to the Friday Fault, indicating the presence of large potentially mineralized structures.
  • High chargeability and resistivity typically indicate the presence of sulphides and silicification, both of which are associated with gold mineralization at the Idaho Gold Project.

“Collectively, the different geophysical surveys indicate and delineate fault structures, alteration, and sulfide mineralization indicating the best targets for potential gold mineralization. When correlated with gold-in-soils, past drilling, and mapping, Premium has the tools in hand for making multiple new discoveries in its Phase-Four drilling and exploration program,” stated Mike Ostenson.

Historic Resources:

  • Deadwood Zone hosts a historic deposit of 57,500 oz in 2.6 Mt @ 0.8 g/t Au with a 0.4 g/t Au cut-off (see disclaimer). The historic deposit is located within 1.0 km of 8 km gold-in-soil and geophysics anomalies and remains open along strike and depth.
  • Buffalo Gulch Zone hosts a historic 111,000 oz indicated gold resource in 4.8 Mt @ 0.8 g/t Au with a 0.4 g/t Au cut-off (see disclaimer). The historic resource is located within 0.5 km of 4.0 km of soil & geophysical anomalies and remains open along strike and depth.

2011 Diamond Exploration Program in Nunavut

Posted by on Monday, 28 March, 2011

The Peregrine Diamonds Ltd. 2011 program has two primary objectives:

  • Continued exploration focussed on discovering large kimberlites using new targeting information developed from the 2010 discovery of the CH-31 and CH-33 kimberlites. CH-31 is drill-confirmed at greater than five hectares in surface area, and new geophysical interpretations for CH-33 indicate potential for an elongated body with surface area greater than seven hectares.
  • Further evaluation of known kimberlites with economic potential by core drilling and/or mini-bulk sampling.

The main work activities approved for 2011 include the following:

  • Up to 13,000 metres of core and reverse circulation (“RC”) drilling with the following principle objectives:
    • Core and/or RC drilling of high-priority geophysical anomalies with large surface footprints that have been selected from airborne geophysical surveys conducted in 2008 and 2010, as well as priority targets that will be developed from the airborne survey that is currently underway.
    • Core drilling of the known high-interest kimberlite bodies to increase the understanding of their size, geology and diamond content.
  • Collection of a mini-bulk sample of approximately five tonnes by core drilling from the CH-31 kimberlite. CH-31 is estimated at over five hectares in size and an 840 kilogram microdiamond sample collected in 2010 returned 1.39 carats of commercial size (+0.85 mm) diamonds.
  • Collection of a 20 tonne mini-bulk sample from the surface of the CH-28 kimberlite. CH-28 is estimated at two hectares in size and a 239 kilogram microdiamond sample collected in 2010 returned 0.193 carats of commercial size (+0.85 mm) diamonds.
  • Completion of a 12,000 line-kilometre RESOLVE heli-borne magnetic-electromagnetic geophysical survey.
  • Ground geophysical surveys over anomalies selected from the 2008, 2010 and 2011 airborne geophysical surveys.
  • Indicator mineral sampling, ground geophysics and prospecting; 24 of the 50 currently known kimberlites have been discovered at surface by prospecting.
  • Initiation of preparations for a multi-kimberlite 2012 bulk sampling program.
  • Continuation of environmental baseline studies.

Field work has commenced at Chidliak with the construction of a third exploration camp, named Aurora, located 42 kilometres north of the Discovery Camp, and the initiation of ground and airborne geophysical surveying. Drilling of lake-based targets in the northern portion of the Project is scheduled to commence this week. Lake ice conditions are expected to support on-ice drilling until at least mid-May. The first two drilling locations will be the CH-17 kimberlite and anomaly 165, located 200 metres south of CH-17 and three kilometres north of Aurora Camp. In April and May, a second core drill and an RC rig will be utilized to test targets in the central portion of Chidliak.

Peregrine geophysicists have recently selected 21 geophysical anomalies over two hectares in size for follow-up this year, four of which are interpreted to be greater than 4.5 hectares. Many of these anomalies display magnetic/electromagnetic responses similar to the large CH-31 and CH-33 kimberlites. These anomalies will be evaluated by ground geophysics this winter and priority targets will be drilled this year. The Company also expects to generate additional large targets this spring from the 12,000 line-kilometre RESOLVE heli-borne survey that is currently being flown.


IP-resistivity survey in Peru

Posted by on Monday, 14 March, 2011

Rae-Wallace Mining Company announces the completion of an IP-resistivity survey at its Toro Blanco gold project, located in the Huancavelica Department of southwest Peru. Toro Blanco hosts high-sulphidation, epithermal-style gold mineralization and is the Company’s top exploration priority for 2011.

The 19 line-kilometer survey defined an anomalous 2-kilometer by 1.5-kilometer zone which returned low to moderate IP values consistent with a response expected from a large volume of hydrothermally altered rock containing disseminated, potentially gold-bearing sulfides. This large IP anomaly is partially coincident with a 2-kilometer by 0.25-kilometer ENE-trending sinuous zone of intense alteration associated with very permissive hydrothermal breccias, dense quartz stockwork and anomalous gold, with rock samples yielding up to 0.976 grams of gold per tonne. Rae-Wallace is currently planning and permitting an 8-hole, 3600-meter drill program to test this target later this year.

Like most of Peru’s epithermal gold camps, Toro Blanco is underlain by Tertiary-aged volcanics and related coeval intrusions. Alteration assemblages (intermediate to advanced argillic alteration), elemental associations (Mo, Cu and Pb anomalies) and geophysical responses (chargeability anomalies associated with resistivity anomalies) also support the project’s epithermal target model.

The geophysical survey was designed and interpreted by Dr. Richard Van Blaricom of Spokane, Washington and was performed by Fugro Ground Geophysics of Lima, Peru.