Archive for category Airborne

High Resolution Airborne Geophysical Survey in Tanzania

Posted by on Sunday, 19 January, 2014
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Geological Survey of Tanzania (GST) and Ministry of Energy and Minerals of Tanzania have organized the Workshop “Launching High Resolution Airborne Geophysical Data at Julius Nyerera Convention Center (17 January, 2014, Dar es Salaam, Tanzania). Around 150 delegates have attended the workshop from government and private sectors.

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

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

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

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Photo: A.Prikhodko


Radon Survey Commences to Prioritize Untested Conductors for uranium in Athabasca basin

Posted by on Monday, 13 January, 2014

FISSION URANIUM CORP. announces it has commenced a new large coverage, $500,000 Radon in lake survey at its 100% owned Patterson Lake South (PLS) property in Canada’s Athabasca Basin. The survey is following up on ten geophysics-identified basement electromagnetic (EM) conductors. Fission’s lake bottom technique survey, conducted in the winter beneath the ice, and analysis has proved key in identifying radioactive anomalies and assisting accurate drill targeting in the previous two drill programs at PLS (>86% mineralization hit rate). To date, Fission’s highly successful Radon survey and analysis has been used systematically on only 1 EM conductor (PL3B conductor) on a property which hosts over 100 such basement EM conductors.

The ten conductors are located in 4 separate areas (Area A, B, C and D) beneath Patterson Lake and Forest Lake.

Ross McElroy, President, COO, and Chief Geologist for Fission, commented,

Our lake bottom, winter radon survey and analysis techniques were critical elements in targeting the first strike holes at six of the seven zones and numerous successful step-outs. PLS is a hugely prospective property with a multitude of conductors and just as our understanding of the geology has evolved in the past two exploration programs, so too has our use of Radon survey technology. With approximately 20% of the upcoming drilling focusing on exploring new areas of interest, we expect this radon survey to play an important role in targeting and prioritizing new holes.”

News Highlights

  • 10X expansion of radon survey coverage at PLS
  • Areas to be targeted include a total of ten high priority EM conductors
  • Survey has already commenced and is expected to take five to six weeks to complete
  • Fission’s use of radon has been instrumental in targeting the first holes at six zones found to date and successfully hitting step outs as large as 390m
  • A total of 2,300 samples will be taken from 4 areas covering discrete identified EM conductors. Areas A, B and C cover EM conductors within Patterson Lake. Area B covers EM conductors within Forrest Lake, located immediately to the south of Patterson Lake – all areas are on the PLS property
  • Forest Lake Radon Survey Area

An EIC (Electret Ionization Chamber) survey to measure radon, will be conducted by RadonEx Exploration Management, of St Lazare, Quebec. The survey will comprise primarily samples of measurements of radon in water.

Area A

Area A is comprised of a group of 4 main north-east trending EM conductors, including the PL3B EM conductor (which is associated with the high-grade “R” zones). The upcoming survey will cover 3 parallel interpreted time domain electromagnetic (TDEM) conductors, each discrete conductor ranging in strike length between 1.0km – 1.9km strike length. A total of 743 samples will be collected.

Area B

Area B is located approximately 2 to 3km north-east of the PL-3B conductors. The survey will cover a single 1.2km long north-east trending EM conductor. A total of 231 samples will be collected.

Area C

Area C encompasses two discontinuous north-east oriented and segmented airborne EM conductors (VTEM). The northern conductor is interpreted to be segmented in 2 sections, of strike length of 1.2km and 0.3km respectively. The southern conductor is similarly segmented in 2 sections of 0.7km and 0.3km each. A total of 305 samples will be collected.

Area D

Area D encompasses three intermittent north-east trending VTEM conductors. Two conductors cover a strike length of 4.1km, while the 3rdcovers a length of 1.3km. A total of 1,031 samples will be collected.

Patterson Lake South Property

The 31,039 hectare PLS project is 100% owned and operated by Fission Uranium Corp. PLS is accessible by road with primary access from all-weather Highway 955, which runs north to the former Cluff Lake mine and passes through the nearby UEX-Areva Shea Creek discoveries located 50km to the north, currently under active exploration and development.

 


Linking Porphyry Deposit Geology to Geophysics via Physical Properties

Posted by on Tuesday, 7 January, 2014

Geoscience BC Releases the Report:

Linking Porphyry Deposit Geology to Geophysics via Physical Properties: Adding Value to Geoscience BC Geophysical Data
by Dianne Mitchinson, MDRU; R.J. Enkin, GSC; and C.J.R. Hart, MDRU.

Regional geophysical surveys were flown in 2007 and 2008 as part of the QUEST and QUEST-West projects to improve geological understanding in Quaternary sediment-covered areas and thereby encourage mineral exploration. As part of the ongoing process of adding value to Geoscience BC datasets, Project 2009-001, “Integrated Geological & Geophysical Porphyry Models: Adding Value to Geoscience BC Geophysical Data (NTS 93E, 93K, 93L, 93M, 93N)” was undertaken to define relationships between geophysical datasets collected as part of these QUEST surveys and porphyry deposit geology at six known porphyry deposits. The deposits chosen for investigation include: Mount Milligan, Endako, Huckleberry, Bell, Granisle and Morrison. 
Geoscience BC Report 2013-14 presents physical rock property data from the six above-listed BC porphyry deposits, and discusses observed trends within the detailed QUEST and QUEST-West geophysical datasets and mapped geology. The resulting physical rock property data compilation has implications for improving interpretations of geophysical data from porphyry deposits. A synopsis of physical property criteria defining hydrothermally altered or mineralized rocks in BC porphyry settings is provided, which can ultimately be used for ranking similar mineral exploration targets throughout BC, thereby minimizing exploration risk.

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Porphyry deposits surveyed during the QUEST and QUEST-West projects include Mount Milligan, Endako, Huckleberry, Bell, Granisle, and Morrison. Airborne magnetic and electromagnetic surveys (VTEM or AeroTEM) were conducted over each of these deposits. Additionally, a ZTEM (Z-axis tipper electromagnetic) survey was completed over the Mount Milligan deposit as a joint initiative between Geoscience BC and Terrane Metals Corp.

2009 : AeroTem Survey Results from the Equity Silver Mine
- Mineral Exploration Roundup Poster (pdf, 3.96MB)

Technical Article: 2009: “QUEST-West Geophysics in Central British Columbia (NTS 093E, F, G, K, L, M, N, 103I): New Regional Gravity and Helicopter-Borne Time-Domain Electromagnetic Data”
- Summary of Activities 2008, Report 2009-1 p.1-6 (pdf, 4.64MB)

 

 

 

 

 

Geophysical Surveys

 

 

Technical Article: 2007 : “Airborne electromagnetics and airborne gravity in the QUEST Project area, Williams Lake to Mackenzie, British Columbia (parts of NTS 093A, B, G, H, J, K, N, O; 094C, D)”
- Summary of Activities 2007, Report 2008-1 p.1-6 (pdf, 6.81MB)

Suggested Reference: Mitchinson, D.E., Enkin, R.J., and Hart, C.J.R. (2013): Linking Porphyry Deposit Geology to Geophysics via Physical Properties: Adding Value to Geoscience BC Geophysical Data; Geoscience BC, Report 2013-14, 116 p.

Report Components


Final ZTEM Survey Results in Guerrero, Mexico

Posted by on Monday, 23 December, 2013

A recently completed ZTEM airborne geophysical survey flown over the Newstrike Capital Inc. Aurea Norte property has successfully identified several high priority anomalies on a parallel trend with its flagship gold deposit at Ana Paula. The survey covered an area known as the San Luis Trend, an important structural corridor over ten kilometres in length that has returned anomalous assays from widespread near-surface gold mineralization.

Preliminary ZTEM results have identified several ‘blind’ exploration targets that coincide with favourable GGB (“Guerrero Gold Belt”) style surface alteration in outcrop that includes iron oxide alteration, jasperoid breccia, silicified intrusion and skarn with associated anomalous gold values. The survey results will be used to focus exploratory drilling along this prospective trend. In addition, several new targets were identified outside this trend that will continue to be investigated as exploration advances,” said Gillian Kearvell, V.P Exploration.

Newstrike Capital Inc. a gold-silver focused explorer, targeting known and historic mining districts in Mexico, is reporting that the final report and interpretation was received from Geotech Ltd. of Aurora, Ontario for the ZTEM airborne geophysical survey flown over the Company’s Aurea Norte property.

Fifteen high priority targets were identified in the report, seven that coincide with anomalous surface gold geochemistry, ranging from weakly anomalous to a best sample of 16.7 grams per tonne gold from outcrop chip samples. A 5,000 metre early stage drill program that will test a selection of these anomalies is now underway. Drilling is expected to take three months to complete and results will be used for planning purposes. Eight of the high priority targets identified in the report represent new exploration targets, a selection of these will be brought to the drill ready phase.

“As explorers, we are very encouraged by the results of this report,” Richard Whittall, CEO, Newstrike Capital commented. “This report has confirmed a number of high priority drill targets based on the strong correlation of previous drilling and surface geochemical results and the imagery from the ZTEM survey. This drill program will be an important first step in evaluating the potential of the San Luis trend.”

The ZTEM survey covered an area known as the San Luis Trend, an important structural corridor over ten kilometres in length that has returned widespread near-surface gold mineralization that coincide with favourable GGB (“Guerrero Gold Belt”) style surface alteration in outcrop, including iron oxide alteration, jasperoid breccia, silicified intrusion and skarn. A selection of assay results over 1.0 grams per tonne gold from outcrop chip sample taken along this trend is presented in the table below. Gold distribution maps and a complete table of gold and pathfinder element assay results from outcrop chip samples are available on the company website at www.newstrikecapital.com.

The objective of the Aurea Norte ZTEM survey was to locate potentially buried intrusive bodies associated with the GGB mineralization model and to identify controlling structures at the Ana Paula deposit and along the mineralized San Luis Trend. The new anomalies identified by the ZTEM survey include resistivity and conductivity contrasts typical of buried silicified intrusions and with alteration commonly associated with skarn-porphyry and epithermal style deposits. Exploration activities are currently focused on advancing the project pipeline around the Company’s flagship Ana Paula project, and include the eastern half of the 59,587 hectare Aurea Norte property. Mapping and surface sampling continue to advance new targets to the drill ready phase.

The Ana Paula project is located internal to and is surrounded by the Aurea Norte property. It is host to a structurally controlled epithermal style gold deposit with a pit constrained resource* of 43.million tonnes that includes 2.20 million ounces of contained gold and 9.7 million ounces of contained silver in all categories at a weighted average grade of 1.56 grams per tonne gold and 7.5 grams per tonne silver (NI-43-101 technical report filed May 8th, 2013, available on the company website or at www.sedar.com). *(applying cutoff grade of 0.45 grams per tonne gold equivalent (AuEq) defined by the price, cost and recovery assumptions).


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

Posted by on Friday, 20 December, 2013

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

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

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

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

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

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

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

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

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


Identifying a copper porphyry using EM airborne survey

Posted by on Thursday, 19 December, 2013


The New Silver-Copper Trend in Sierra Leone after airborne EM

Posted by on Thursday, 19 December, 2013

Declan Resources Inc.  -

Highlights:

  • First hole on VTEM anomaly: NEDD001- 5.40 grams per ton silver, 1478 ppm copper over 6.25 metres
  • 400 metres south on VTEM anomaly: NEDD010-6.2 grams per ton silver, 1531 ppm copper over 20.0 metres
  • Silver Copper bearing VTEM anomaly traced for 400 metres with 6 diamond drill holes open on strike and to depth

Declan Resources Inc. announces the completion of its 2013 exploration program at its Nimini Hills Property, Sierra Leone. In the Northeast of the property a polymetallic structure, potentially related to a Volcanic Massive Sulfide system, has been discovered. The Nimini Hills program utilized various exploration techniques as more fully set out below. The extensive database is being used by the Declan’s geologists and consultants to plan additional work for early 2014.

 

 

 

 

 

 

 

 

 

 

 

 

 

Table Y: Results from Northeast VTEM drilling
HOLE # From
(M)
To
(M)
Length
(M)
Au
(ppb)
Ag
(Grams)
Cu
(ppm)
Pb
(ppm)
NEDD001 95.0 97.0 2.0 6.2 1660
And 101.30 107.55 6.25 5.4 1478
Includes 106.89 107.55 0.66 20.4 896
NEDD002 89.27 99.00 9.73 50.8 2253
Includes 89.95 90.45 0.50 1600 880 3790 42000
91.00 92.00 1.00 10.1 1586
95.00 95.50 0.50 14.2 6530
95.50 96.00 0.50 16.0 13300
And 104.00 109.00 5.0 3.0 1428
NEDD007 187.30 188.00 1.7 5.2 1225
220.00 221.88 1.88 4.2 705
226.95 230.40 3.45 18.1 4705
Includes 227.65 228.23 0.58 50.5 9750.0 1582
228.23 229.00 0.77 14.5 1697.6
229.00 229.55 0.55 18.0 6650.0
229.55 230.40 0.85 10.6 5410.0
NEDD008 18.30 39.00 20.70 7.1 3132
Includes 18.80 29.00 10.2 11.7 4998
18.80 20.06 1.26 11.7 1946
20.06 20.85 0.79 11.5 3830
21.35 21.87 0.52 15.8 3070
23.25 23.75 0.50 39.1 34210
24.25 24.75 0.50 30.8 21061
24.75 25.74 0.99 10.4 6280
NEDD009 77.50 102.57 24.50 6.1 2566
Includes 77.50 88.65 11.15 6.8 2978
93.69 102.57 8.88 3.5 594
82.50 83.00 0.50 31.6 13150 1144
83.00 83.54 0.54 21.8 5050 925
83.54 85.00 1.46 10.8 2930 517
And 110.00 118.26 8.26 4.5 1299
Includes 114.10 114.96 0.86 10.6 809
And 135.77 138.17 2.40 5.0 1875
NEDD010 96.25 99.90 3.65 4.2 1788
And 104.00 124.00 20.00 6.2 1531
Includes 114.49 115.57 5.01 11.1 2558
112.75 113.47 0.72 11.1 1710
115.57 116.40 0.83 10.1 3000
116.40 117.08 0.68 26.1 1310
117.08 117.90 0.82 11.9 1220
118.85 119.50 0.65 16.9 8330
And 130.00 135.04 6.01 2.1 846
*All intercepts are core length, true width at present unknown

Declan’s President Wayne Tisdale states, “We are greatly encouraged by the initial results of our Nimini Hills Property, in particular the new Northeast polymetallic discovery. We believe that Sierra Leone is vastly underexplored and our airborne survey has produced multiple additional drill targets.”


Seismic and airborne geophysics for copper project in southeast Arizona

Posted by on Saturday, 14 December, 2013

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

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

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

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

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

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

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

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

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

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


100 NEW EXPLORATION TARGETS IDENTIFIED AT MANIITSOQ (Greenland)

Posted by on Wednesday, 4 December, 2013

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

 

 

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

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

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

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


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

Posted by on Wednesday, 4 December, 2013

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

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

Aldrin drill targets

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

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

 


“Airborne EM: Protecting Aquifers in the Yucatán”

Posted by on Tuesday, 5 November, 2013

by Dan Zlotnikov on November 5, 2013

“Mexico’s Yucatán Peninsula has long been a popular tourist attraction and for various reasons. These include welcoming beaches, fascinating Mayan ruins, and of course, the cenotes, which consist of beautiful sinkholes or openings that expose the groundwater and lead to the longest underwater cave systems in the world.

But the cenotes are more than just a tourist attraction for swimming, snorkelling, and diving: The aquifer is the sole source of fresh water in the region. This has posed a serious challenge for ongoing development and prompted a local non-profit group, the Amigos de Sian Ka’an, to commission an airborne EM survey to map the flow of fresh water underground. The survey was flown by the Geological Survey of Austria on helicopters provided by the Mexican military. The collected data were then analysed by Dr. Yusen Ley-Cooper, who is now a research scientist with Australia’s Commonwealth Scientific and Industrial Research Organisation (CSIRO).

As Dr. Ley-Cooper explains, the aquifers face two simultaneous threats.

“One is that sewage is being pumped into them [aquifers are underground layers of material from which ground water is extracted using a well]. The other is that hotels and the local, growing population have a requirement for fresh water and so are extracting from these aquifers. And because the cenotes are near the coast, if you over-extract, you end up drawing in salt water, further contaminating the water supply.” This survey, flown with a frequency domain system at a 200-metre line separation, had an unusual ancillary database against which to cross-reference its results: A detailed set of maps of the network already existed – the result of data collected by cave divers over many years of exploration, which have been archived by the Quintana Roo Speleological Survey (QRSS) .”

- See more


New Discovery of SEDEX Mineralization at Akie East Panel in BC

Posted by on Thursday, 31 October, 2013

Canada Zinc Metals Corp. provides an update on the Company’s recently completed exploration program conducted on the Akie project and on several of the Kechika Regional properties.

The 2013 exploration program had two main objectives: 4,000 metres of diamond drilling on the Akie property and completion of the airborne Versatile Time Domain EM (VTEM) geophysical survey over the entire Kechika Regional claim package, including the Pie, Yuen and Cirque East properties recently optioned to Teck Resources (see press release dated September 9, 2013).

The Akie property is the Company’s flagship exploration project and host to the Cardiac Creek SEDEX Zn-Pb-Ag deposit. The Kechika Regional Project, represented by a series of property blocks including Pie and Mt. Alcock, extends northwest from the Akie property for approximately 140 kilometres covering the highly prospective Gunsteel Formation shale. The southernmost project boundary is located approximately 260 kilometres northwest of the town of Mackenzie, in northeastern British Columbia, Canada.

Airborne VTEM Survey:

Earlier in the season, the Company completed a comprehensive airborne geophysical survey over the remainder of the Kechika Regional properties using Geotech Ltd.’s Versatile Time-Domain Electromagnetic (VTEM) system. The primary goal of the survey was to obtain lithological and structural information near surface and at depth across the properties, as well as define geophysical responses for Gunsteel shale stratigraphy. A total of 2,795 line kilometres were flown. The final dataset has now been received and is currently being reviewed. An interpretative report is planned for completion in late fall.

The Company had successfully completed 1,526 line kilometres of VTEM coverage over the Akie, Pie and Mt. Alcock properties in 2012. The combined 2012 and 2013 surveys provide complete airborne VTEM coverage over the Company’s entire Kechika Trough mineral tenure holdings. This represents a total of 4,321 line kilometres of survey at a nominal line spacing of 200 metres or better, spanning over 140 kilometres of strike length of prospective Gunsteel Formation stratigraphy, the known host to SEDEX Zn-Pb-Ag deposits in the Kechika Trough district.


Geophysical modelling suggests one of the world’s largest kimberite

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

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

HIGH GRADE NICKEL-COPPER-COBALT SULPHIDES CONFIRMED AT IMIAK HILL IN GREENLAND

Posted by on Thursday, 10 October, 2013

North American Nickel Inc. announces high grade nickel- copper-cobalt mineralization at its Imiak Hill discovery based on results from drill holes MQ-13-019, MQ- 13-024 and MQ-13-026.

Assays of up to 7.06% nickel in MQ-13-026 and 6.26% nickel in MQ-13-024 have been received.

Imiak Hill is one of three mineralized conduits at the Imiak Hill Conduit Complex (IHCC) located in the northern part of the Company’s 100% owned Maniitsoq Nickel – Copper – Cobalt and PGM project in southwest Greenland.

IMIAK HILL

Highlights of the Imiak Hill drilling: DDH MQ-13-026: at 149 m down the hole:
  • Intersected 25.51m grading: 3.25% nickel, 0.48% copper, 0.11% cobalt,
    • Including: 18.62m of 4.31% nickel, 0.62% copper, 0.14% cobalt
      • Including: 7.12m of 5.18% nickel, 0.81% copper, 0.17% cobalt
      • Including: 4.01m of 6.04% nickel, 0.64% copper, 0.19% cobalt
DDH MQ-13-024: at 136 m down the hole:
  • Intersected 14.90m grading: 2.67% nickel, 0.39% copper, 0.09% cobalt
    • Including: 5.23m of 5.03% nickel, 0.30% copper, 0.16% cobalt
DDH MQ-13-019: at 118 m down the hole:
  • Intersected 8.68m grading: 1.53% nickel, 0.43% copper, 0.06% cobalt
    • Including: 3.56m of 3.27% nickel, 0.66% copper, 0.10% cobalt

Assays for the deepest 2013 hole at Imiak Hill, DDH MQ-13-028, which is below DDH MQ-13-026, are pending. The mineralization at Imiak Hill remains open at depth.

NAN CEO and Chair, Rick Mark, states: “It is especially positive that at Imiak Hill that we are seeing stronger grades and widths at depth within a geological setting consistent with our conduit system model of an expected accumulated zone of nickel-copper mineralization in an embayment or footwall contact. Our 2013 drill program at Imiak Hill has now extended the sulphide mineralization from surface to 185m below surface, where it remains open, and assays are still pending for hole 28. The results from our first regional evaluation of the mineralized norites underscores the potential along the 75km-long Greenland Norite Belt. We believe the Maniitsoq project is unique in the world. It is considered a greenfields exploration project, but it is a district-scale, nickel sulphide project that has mineralization starting at, or near, surface containing high grades of Ni-Cu-Co and it is located adjacent to ice free, deep tide water suitable for year round shipping. I offer congratulations to our outstanding technical team, not only for today’s results, but for the constant and impressive advancement at Maniitsoq for the past two and one half years. The future looks just as exciting. We look forward to the upcoming assays from theImiak Hill Conduit Complex.”

REGIONAL DRILLING RESULTS

Holes MQ-13-010 through 17 tested seven VTEM targets related to norite intrusions in the central and southern parts of the 75km-long Greenland Norite Belt. Table 3 summarizes the assay results and table 4 lists the collar coordinates of each hole along with the target tested.

Disseminated sulphide mineralization was intersected in noritic rocks at five of the seven targets.

The strongest mineralization occurred in hole MQ-13-016, which tested VTEM target P-22B. The hole intersected 43.82 m of mineralized norite averaging 0.22% Ni including several higher grade intervals, the best was a 1.26m interval assaying 1.44% Ni, 0.34% Cu, 0.05% Co and 0.32 g/t TPM.

Hole MQ-13-017, drilled on the same section and designed to test 40 to 50 metres down-dip of MQ-13-016, intersected much weaker mineralization over narrow intervals. The best assay was 1.92 m at 0.23% Ni. Based on the surface gossan outcrop, it is possible that MQ-13-017 was drilled below the plunge of the mineralization intersected by MQ-13-016. Initial review of downhole geophysics indicates more conductive material lies to the right and above the drill hole, which also fits the interpretation of the drill hole passing under the plunge.

All eight holes were surveyed with a three-component electromagnetic probe. The results will be reviewed in conjunction with geological observations to determine which of the regional targets drilled in 2013 warrant follow-up drilling and/or surface geophysical surveys in 2014.

2013 VTEM FLYING SUMMARY

In 2013 NAN flew an additional 917.3 line-km of VTEM helicopter borne time domain electromagnetic and magnetic surveys over portions of the Maniitsoq property. A total of nine flight blocks were surveyed. They covered norite and other mafic-ultramafic intrusions outside the Greenland Norite Belt (GNB) as well as areas within the belt that required more detailed surveying. Significant new conductors were identified in the Pingo norite intrusion, situated about 14 km north of the GNB; in areas to the south and southeast of the GNB; and, within the GNB itself. These new conductors are currently being evaluated in preparation for next year’s drilling program.

The Maniitsoq nickel-copper-cobalt & PGM project in southwest Greenland contains the 75km-long Greenland Norite Belt (GNB) and is 100% owned by North American Nickel.


Newmont and the NEWTEM experience

Posted by on Wednesday, 9 October, 2013
“Over the past two decades, the use of time-domain electromagnetic (EM) surveying systems, designed for an airborne helicopter-based platform, has risen in popularity. One of the first of these systems was developed and has been operated by Newmont Mining Corporation. The original system (NEWTEM I) and its more capable successor (NEWTEM II) were created to help our company explore for different types of mineral deposits, primarily gold bearing, as well as to provide general geologic mapping information in parts of the world that are often very difficult or expensive to explore otherwise.
The NEWTEM system has some characteristics that have proven to be advantageous in terms of safety, cost of operation, spatial resolution, and the ability to map effectively at both ends of the resistivity scale. Our approach to the acquisition, processing, and interpretation of airborne EM data is specific to this system and to the goals of our gold-focused exploration programs. Using what is most often a locally derived helicopter, we are able to carry out a survey of whatever size our exploration program dictates and on a schedule that meets our company’s needs. Results from NEWTEM surveys have been used to identify conductive and resistive targets but more importantly to advance our general understanding of an area’s potential to host mineralization of interest to this company. We intended to provide a brief written account of the NEWTEM story for the scientific and exploration communities, including information about its design and capabilities, as well as how we process this type of data. “

VTEM Survey Identifies Five Main Conductive Anomalies on Miller Lump/Vein Graphite Property

Posted by on Tuesday, 8 October, 2013

Canada Carbon Inc. announces that it has received the final results of the Geotech VTEM airborne survey performed over the Miller graphite property. Processing of the VTEM data allows for the derivation of multiple products used collectively in identifying priority targets for follow-up work. Five high priority targets were identified, two of which are known to correspond with marble rocks that host the graphite elsewhere on the property.  Additionally, the calculated time constant processing (or ‘Tau’ constant) has identified 86 clusters of smaller-sized EM anomalies on the property which show a strong relationship in signal between each other. Assessment of these anomalies will continue, with testing of the targets through trenching and/or drilling under consideration.

R. Bruce Duncan, CEO & Director of Canada Carbon Inc. stated, “Canada Carbon is very pleased with the results of the Geotech survey, which highlights an impressive number of high-priority exploration targets that are widely distributed over the Miller property. Our excellent road access to the property will allow our team to quickly prioritize these anomalies and focus on those with the greatest potential. These geophysical results are an important technical asset that will continue to lead to new graphite discoveries in the very near future at the Miller graphite property.”

The survey entirely covered two claim blocks (named East and West) that constitute the Miller Property. Principal sensors for the survey included a Time Domain EM system and two magnetometers to measure horizontal gradient. The total surveyed area is 25 kilometres (km)2 and the total line coverage is 336 line-km. Signals due to known cultural sources such as power lines and houses were removed from the EM data. On the East block, survey lines were flown in a northeast to southwest direction, with a line spacing of 100 meters (m). A spacing of 50m was implemented in the central part of the block where historic mining took place, and where graphite veins and pods are currently being tested through trenching and drilling (see news release September 18, 2013). Two major anomalies (E1 and E2) are present on the East block, occurring respectively at 100m depth and 80-100m depths. Anomaly E1 is located 800m north of the mine pit, with an approximate diameter of 400m.  Magnetic maps show that E1 is located between two magnetic anomalies that could correspond to the contact of two geological units with a similar geological context to the known Miller mineralization.  Anomaly E2 is located next to the current trench work area. Anomaly E1 is positioned where Canada Carbon recently obtained an access agreement for exploration work, with E2 partly included along its north extension (see news release September 5, 2013).

The West block was flown in a northwest to southeast direction with line spacing of 100 m.  The West block hosts three major anomalies (W1 to W3).  Anomaly W1 is located in marble and is sub-vertical at 100m depth, and W2 is also located on a contact zone of a marble with intrusive rocks. Both W2 and W3 are close to the surface according to the survey results.

The five main conductive targets were selected for their high amplitude conductivity, along with their significant extent (hundreds of metres) and detailed morphology.  Additional conductive anomalies of lesser amplitude form dense clusters on both claim blocks.  These clusters were selected on the basis of their spatial distribution and by the nature of the EM signal in between them as depicted on time constant image generated by Geotech.

On the East block, 40 EM clusters consisting of one or more EM anomalies are present, with the clusters having a mean diameter of approximately 100 meters.  Among these anomalies, a 500m along-strike anomaly with a depth of at least 100 meters is present in the vicinity of the Miller mine pit and will be subject of further resolution by Geotech.  Southeast of the Miller mine pit, an anomaly is also present that shows along-strike continuity with the mine pit anomaly.  Many small historic trenches are found along these anomalies at surface, and Company geologists believe that it is very likely that graphite is the cause of these new anomalies.

The West block hosts 46 clusters with a mean size of approximately 200m, and is scheduled to be tested through prospecting and beep-mat surveys to prioritize their potential.  Geotech will also continue to assess the data to resolve the centers of the five main conductors.  This will also include detailed resistivity depth imaging and plate Maxwell 3D models.  This information will be used to establish a drill program for the most promising anomalies.

Previous EM methods used on the property resulted in the discovery of many graphite veins (see press release dated June 27th 2013).  The many historic graphite pits and trenches on the property indicate that graphite is distributed widely and the Company expects that many of the clusters will be correlated with graphite mineralization.  Each of the anomaly clusters has the requisite size and EM response to represent potential new individual graphite discoveries. On-ground prospecting and beep mat surveys are planned over the main anomalies as well as over several of the clusters.  The Company intends to complete these activities during the fall, with the results used to focus upon the best exploration targets.


Airborne Geophysics on Auden Graphite Property

Posted by on Thursday, 3 October, 2013

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

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

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