Posts Tagged VMS

After airborne EM: 71 m of Sulphide Mineralization in Felsic Volcanics at Homer Lake

Posted by on Tuesday, 13 May, 2014

TerraX Minerals Inc.  has received assay results from the first four holes drilled during the recently completed winter drill program at Northbelt, Yellowknife City Gold Project. These holes were drilled at the Homer Lake base metal target, which is located within 15 km of the city of Yellowknife and just 2 km from the new Bluefish Hydro Dam opened in July 2013. Assay results from nine holes drilled on TerraX’s two top priority gold targets, Crestaurum and Barney Shear, are pending and will be reported in the coming weeks, with the summer drill program expected to begin in late June 2014.

Two holes, TNB14-003 and TNB14-004, where drilled to test the down dip extension of surface showings sampled by TerraX in 2013 (chip samples of 7.0m @ 0.50 g/t Au 90.2 g/t Ag, 4.25% Pb and 0.89% Zn) and intersected felsic volcanics that are pervasively mineralized including multiple massive to semi-massive sulphide zones.

 

 

 

 

 

==================================================================

 

Highlights include:

        
        --  71.15m @ 0.25 g/t Au, 14.0 g/t Ag, 0.73% Pb and 0.57% Zn in hole TNB14-
            004 (inclusive of 3.42m @ 3.41 g/t Au, 69.3 g/t Ag, 3.67% Pb, 3.17% Zn
            in massive sulphides) and
        --  60.87m @ 0.11 g/t Au, 10.4 g/t Ag, 0.58% Pb and 0.65% Zn in hole TNB14-
            003;
               
===================================================================================
The Homer Lake drill program was designed to test a 400m-500m long VTEM (electromagnetic) anomaly with an interpreted steep westerly dip that had been identified by airborne surveying in 2013 and continues for a further 1km as a weaker VTEM anomaly to the south. 

Two holes (TNB14-001 and TNB14-002) were drilled with an easterly azimuth on sections 100m apart and designed to intersect the northern end of the anomaly. Holes TNB14-003 and 004 were drilled to the east of the anomaly in an area where base metals were identified in historic trenches during 2013 field work (eg. chip samples of 7.0m @ 0.50 g/t Au 90.2 g/t Ag, 4.25% Pb and 0.89% Zn). A map showing the location of these drill holes is available on our web site atwww.terraxminerals.com .

Higher grade intervals occur within the mineralized felsic volcanic unit, and also in the adjacent mafic volcanics (see table). Within TNB14-004 these include 3.42m @ 3.41 g/t Au, 69.3 g/t Ag, 3.67% Pb and 3.17% Zn within felsic volcanics; and 5.31m @ 0.40 g/t Au, 64.5 g/t Ag, 3.65% Pb and 2.64% Zn at a felsic to mafic volcanic contact. Within TNB14-003 high grade intervals include 4.44m @ 0.16 g/t Au, 25.5 g/t Ag, 2.10% Pb and 2.59% Zn at a mafic to felsic volcanic contact; 1.50m @ 1.70 g/t Au, 43.3 g/t Ag, 2.41% Pb and 2.04% Zn in felsic volcanics; and 2.02m @ 0.34 g/t Au, 85.1 g/t Ag, 4.08% Pb and 3.72% Zn at a felsic to mafic volcanic contact.

Joe Campbell, P.Geo, President of TerraX, states “The mineralization drilled in holes TNB14-003 and TNB14-004 is located along one of six sub-parallel zones of mineralization identified by TerraX in field work during the summer of 2013. Several of these zones have been traced over hundreds of meters of strike length on surface. While the high-grade gold targets at Northbelt remain our top priority, these wide zones of mineralization, coupled with the higher grade intervals of massive sulphides, are indicative of a large precious metal-rich base metal mineralized system in the Homer Lake area that definitely warrants further exploration when time and resources permit.”


Complex interpretation of geo data for Eskay Creek style mineralization in BC

Posted by on Tuesday, 6 May, 2014

Dolly Varden Silver Corporation announces the results from its geophysical program at the Dolly Varden property in Northwestern BC. The geophysical models further confirm drill targets for the Company’s proposed 2014 drill program and identify several new targets.

The newly compiled geophysical data outlines key horizons at depth and other surface anomalies that are coincident with known mineral showings, geochemical and structural targets already identified on the Dolly Varden property.

Dolly Varden

The combination of airborne MAG, VTEM, ZTEM radiometric, and geochemical data, along with geological and structural mapping, was used to define priority target zones. These helped define steep linear features, syngenetic faults, lithologic contacts related to basin formation, and key fluid controlling structures. In addition, key rock units, contact zones and alteration zones most likely to be associated with mineralization, were identified.
This compilation has demonstrated that the known deposits, showings, and related alteration zones are all located within a rift setting. The key rock units that infill the rift have also been identified, and these represent viable targets for Eskay Creek style VMS mineralization. Drilling will be conducted within corridors where mineralized occurrences and coincident alteration haloes point to extensive hydrothermal fluid flow. The key target areas for 2014 drilling include syngenetic VMS-style mineralization and associated feeder structures.

To view the image accompanying this press release, please visit the following link: http://media3.marketwire.com/docs/DV506-F1.pdf or visit www.dollyvardensilver.com.

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The review of all available geophysical models identified six targets that are being recommended for follow-up work. Three of these targets are new and are located near the northern boundary of the Dolly Varden property and three of the identified targets confirm existing targets that are already scheduled for drilling in 2014.

The geophysical data adds information about the geometry and outlines the contacts between two key geologic horizons. In particular, the geophysics tracks the DVT Horizon to the north and under the Red Point area. Prior drilling on the DVT Horizon has intersected high grade silver mineralization that remains open to the north. The geophysics was also successful in outlining the Salmon River Formation that is prospective for Eskay Creek style mineralization. The geophysical results are congruent with, confirm, and add additional information to the targets slated to be drilled in 2014.

Further, the geophysical results indicate several new targets that have the potential for additional Eskay Creek style accumulations. These newly developed targets are located on the underexplored northern section of Dolly Varden’s property. The area is several kilometers to the North from the existing historical workings and abuts neighbouring exploration properties controlled by Homestake Resource Corporation and the Homestake – Agnico Eagle Mines joint venture.

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

Geology

The geology underlying the Dolly Varden property consists of volcano-sedimentary rocks belonging mostly to the lower and middle Jurassic Hazelton Group. These include intermediate volcanic and volcaniclastic rocks of the Betty Creek Formation and bimodal volcanic and sedimentary rocks of the Salmon River Formation.

The principal silver-base metal deposits of the Kitsault River valley have been interpreted as vein mineralization by early workers. Devlin (1986) reinterpreted the main deposits to be volcanic exhalative in origin. Deposits of this type are formed as sub-aqueous hot-spring type deposits on the seafloor, as products of hydrothermal solutions that have vented from sub-seafloor fracture and fault systems. Furthermore, the silver deposits of the upper Kitsault valley are mapped with important geological similarities to the Eskay Creek deposit, providing an analog for exploration on the Property.


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

Posted by on Wednesday, 9 April, 2014

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

 

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

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

Geophysics indicates conductive core at Mary March in Central Newfoundland

Posted by on Wednesday, 26 March, 2014

Canstar Resources  provides an update on the current exploration activity for its Mary March Project, located near Buchan’s Junction in Central Newfoundland.
The Company’s recent borehole geophysical program conducted on holes drilled during 2013 has provided results that distinguish a high priority drill target near the Mary March massive sulphide zone. All of the holes surveyed clearly point to a more conductive zone downdip and to the east of holes MM13-29 and MM13-30, suggesting the mineralization is open for expansion in these directions.

 

 

 

 

 

 

 

 

 

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The Mary March zone is the initial discovery area drilled by Phelps Dodge in 1999 where they encountered impressive grades of 10.1% Zn, 1.68% Pb, 0.64% Cu, 122.1 grams per tonne (g/t) Ag, and 4.2 g/t Au over 9.63 meters. The drilling completed by the Company in the Mary March area successfully added to these results, encountering massive sulphide zones with two separate holes. In drillhole MM13-30, 11.6 meters of mineralization containing 3.6% Zn, 0.1% Cu, 0.8% Pb, 25 g/t Ag, and 1.5 g/t Au; including a 3.6-meter high-grade zone containing 7.5% Zn, 0.04% Cu, 1.37% Pb, 26.1 g/t Ag, and 1.7 g/t Au, and extended the Mary March Zone to depth. In MM13-29, 5.0 meters of mineralization was encountered, containing 4.82% Zn, 0.38% Cu, 1.04% Pb, 71.3 g/t Ag, and 1.8 g/t Au, including 3.5 meters of 6.21% Zn, 0.13% Cu, 1.42% Pb, 82.8 g/t Ag, and 1.9 g/t Au (see Company Press Release dated January 21, 2014).
Results for surveys completed for holes in the Nancy April area, which is located approximately 500 meters southwest of the Mary March zone require more data and investigation, remaining relatively underexplored compared to the Mary March zone.

“This is exciting news for our shareholders and for the Mary March project,” stated Danniel Oosterman, President and CEO of Canstar. “In an area where mineralization is known to give weak responses, we are encouraged to find such an obvious anomaly offhole to known mineralization. Needless to say the company regards this as a high priority target for its next drilling program.”


Gravity Anomalies at Depth in Ptarmigan Basin in BC

Posted by on Wednesday, 22 January, 2014

Silver Mountain Mines Inc. announces new results from further modeling of data acquired from the 2013 gravity survey completed on its wholly-owned Ptarmigan Property (the “Property”), located near Radium, British Columbia (see News Release dated October 17, 2013).

Detailed gravity survey data collected by Excel Geophysics previously identified a number of exciting gravity anomalies in the Ptarmigan Basin that merit subsequent evaluation. Continued modeling and interpretation of the gravity data indicates these significant anomalies are located at greater depth than known high grade mineralization identified through surface sampling, trenching and/or diamond drilling completed between 2009 and 2012 (“2009-2012 Geological Exploration Results”). Diamond drilling proposed for 2014 will require deeper holes to evaluate these recently discovered gravity anomalies.

The detailed gravity survey completed within the Ptarmigan Basin comprised a total of 329 gravity stations, with 56 stations along the upper ridge and 273 stations within the basin. Stations within the basin were collected along 25 survey lines oriented east – west, with a station spacing of 50 meters. Survey lines were spaced 50 meters apart within the basin and 25 meters apart in the area over the former Ptarmigan mine workings and the Upper-East Ptarmigan Basin.

Modeling and interpretation of the gravity data has resulted in identification of 3 well defined anomalies in the Ptarmigan Basin (Anomalies D, E, F) (www.silvermountainmines.com/maps.asp), which are interpreted to be located below 240m depth, extending to at least 540 m below surface, based on a minimum density contrast of 1.4 g/cm3. All three anomalies are strong and modeling. Interpretation of the data, as well as correlation to results reported in the “2009-2012 Geological Exploration Results” suggests that these new anomalies are sources and/or deeper extensions of the previously identified shallow mineralization. All three anomalies present very attractive targets and will be drilled in 2014.

Ptarmigan

The northern anomaly (D) is located northwest of the former Ptarmigan Mine, underlying the valley floor and has been interpreted from prior geophysical surveys. The middle anomaly (E) is located east of the surface trace of the former Ptarmigan Mine, with approximate surface dimensions of 172 m x 50 m. The southern anomaly (F) has estimated surface dimensions of 100 m x 26 m. The Upper Ptarmigan massive sulphide occurrence, spatially associated with the west margin of gravity anomaly (F), extends east toward the East Ptarmigan area, where additional drill holes were completed to further evaluate and develop semi-massive to massive sulphide intercepts, identified by surface trenching and drilling in 2009-2012.

These anomalies are the objective of the Company’s proposed 2014 drill program. Analysis and modeling continues on the gravity results from the 2013 program to better define and develop the anomalies.


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.”


COMPLETION FIELD PROGRAM ON CAYENNE-CHILI (ONTARIO) WITH IP

Posted by on Tuesday, 8 October, 2013

Red Pine Exploration Inc.  has recently completed an IP survey and second phase bedrock sampling program over its Cayenne-Chili Property. The Cayenne-Chili Property consists of 24 contiguous mining claims and patents totalling 3900 hectares.  The claims sit in a region interpreted as the western extension of both the Larder-Cadillac deformation zone and the second a western extension from the Porcupine-Destor deformation zone to the north.

New VMS Occurrences Discovered

The initial prospecting, mapping and channel sampling program completed in July, 2013 across the property returned numerous, significant polymetallic assay values that are characteristic of a volcanogenic massive sulphide (VMS) mineralized system.  The program identified an extensive alteration system with sodium depletion and chlorite enrichment, a geochemical assemblage characteristic of a VMS system.  The second round of bedrock sampling was designed to augment the newly discovered anomalous zones.

‘New Zone C’ reported highly anomalous values of 24.7% zinc, 15.6% lead and 1.1% copper. These values are similar to those reported on the historical exploration on the nearby ‘Jefferson Deposit’[1], with the exception of the highly anomalous copper (Cu) values. The historical (1950’s) results intersected 4.43% Zn and 1.25% Pb over 22.9m and 9.1% Zn and 11.5% Pb over 6.9m, but no appreciable copper. In the 1980’s work by Falconbridge encountered 2.7% Zn over 9.12m and 1.6% Zn over 13.83m, with another hole reporting 1.7% Zn over 17.2m. The newly identified copper mineralization leads Company geoscientists to believe that a ‘heat vector’ towards the source of the mineralization can now be established.

Quentin Yarie, president and COO commented:” It is promising to find high grade mineralization beyond the historic showings which complements the current geophysical interpretation.  The alteration and VMS mineralization observed at surface is much more extensive than we had believed based on our review of the previous exploration programs.  We also have a high priority geophysical target immediately north of the sodium (Na) depleted footwall materials – a setting similar to Sturgeon Lake”.


Results from Spring Exploration on Ring of Fire

Posted by on Friday, 9 August, 2013

MacDonald Mines Exploration has received the results from its Spring 2013 drill program targeting volcanogenic massive sulfides (“VMS”) in the Ring of Fire (“ROF”).

The history of geophysical investigation of the property can be found here.

Two drill targets were tested during the program over the Butler 3 and Butler 4 targets respectively. The Butler 3 drilling did not hit appreciable copper or zinc mineralization, but did intersect hydrothermally altered felsic and intermediate volcanic rocks that are indicative that the drill holes are proximal to a large VMS body. The Butler 4 drilling intersected copper and zinc mineralization that Company geoscientists believe to be associated with stratabound mineralization that extends to depth.

“MacDonald is keenly aware that the market, especially today, is only motivated by huge success. James Bay exploration is tough, it is a wetland with little outcrop. Consequently we must utilize drill results for ongoing quantification that further exploration is warranted. The Butler 3 and Butler 4 targets have all the necessary components for discovery:

  • A large heat source (ultramafics, proven komatiates)
  • Laterally extensive alteration (a large system)
  • Known mineralization; zinc, copper, silver and lead
  • Secondary mineralization typically associated with larger VMS systems – tin, enrichment of P2O5 “icelandite”
  • Geophysical signatures (EM, IP, magnetics, and gravity)

We believe we are now moving to the final stages of our exploration efforts. We have quantified geochemical, geophysical and geological (structural) targets and are working on prioritizing these for the next stage of exploration. We expect to be drilling in the fall of 2013 after a full compilation of the data.” – Kirk McKinnon, President & CEO

Two drill holes (BP13-CU19 and CU20), were drilled on the Butler 3 geochemical/geophysical anomaly. No appreciable copper or zinc mineralization was intersected within these drill holes, however the lithologies intersected sodium depleted intermediate and felsic volcanic rocks. This geochemical signature represents a classic alteration vector for VMS mineralization, and leads Company geoscientists to the conclusion that VMS mineralization is to the south-west.

The targeting of the south-west likely represents the extension of the mineralized zone intersecting in drill hole BP12-Cu14. It appears that BP12-Cu19 and BP12-Cu20 are lateral to the mineralized zone.

  • Hole BP12-Cu14 intersected 41.5m of 0.4% Cu, 3.26% Zn and 6g/t Ag
    • Including:
    • 12.5m of 8.54% Zn and 6.24 g/t Ag
    • 5.0m of 1.18% Cu, 3.86% Zn and 14.48 g/t Ag

The target area to the south-west is corroborated by a coincident EM and IP anomaly. Before drilling this target however, the Company intends to conduct a robust structural analysis of the existing drill holes under the direction of Rogerio Noal Monteiro, Ph. D. (Vektore Exploration and Consulting). This data will be used in conjunction with the geochemical and geophysical vector analysis to guide drill targeting.

Drill holes BP13-CU21 and CU22 were drilled on the Butler 4 geophysical anomaly (with coincident IP and EM geophysical anomalies). BP13-CU22 intersected 7.50% zinc over a 3 metre interval, and 0.23% copper over 2 metres. Drill hole BP13-CU21 intersected 0.15% copper over a 12 metre interval. These drill intersections are significant in that they pierced the upper edge of a large sub-vertical electromagnetic plate that was postulated to be associated with VMS mineralization. Now that the Company has verified that this geophysical target is associated with copper and zinc mineralization, a detailed analysis of the structural geology will be undertaken on the target. This information, in conjunction with geochemical and geophysical analysis will be used to develop discrete drill targets.


VTEM09 VMS Prospect in Northern Ethiopia drilling results

Posted by on Tuesday, 23 July, 2013

Tigray Resources Inc. announces assay results from preliminary diamond drill-hole tests of the VTEM09 VMS Prospect on the Harvest Property and the Adi Gozomo Gold target on the Adyabo Project, in Northern Ethiopia. Single diamond drillholes tested both targets as an initial appraisal of prospectivity.

The results include:

  • 10.69 metres grading 3.47% copper, 4.2 grams per tonne gold, 3.69% zinc, and 91 grams per tonne silver from 19.81 metres, including 3.06 metres grading 5.75% copper, 8.00 grams per tonne gold, 0.70% zinc, and 107 grams per tonne silver (TVD001), at VTEM09
  • 7.5 metres grading 2.04 grams per tonne gold from 15.1m (AD001) at Adi Gozomo.

VTEM09 prospect

The high-grade copper and precious-metal enriched VMS mineralization intersected by TVD001 compares favourably with the metal tenor encountered at the Terakimti and Mayshehagne discoveries, and marks the third significant VMS discovery made at Harvest.

The VTEM09 prospect, located 5 kilometres ENE and along strike of Terakimti, was identified by an Airborne VTEM survey, and is characterized by a >200m strike length bedrock conductor. VTEM09 was further defined through mapping, soil sampling and trenching (refer to Tigray’s news release dated Jan 24th, 2013), and is interpreted to be a southwest-dipping, eastward-plunging mineralized VMS shoot. Additional drilling is required to test this prospect along strike, down dip and down plunge.

Adi Gozomo

One short diamond drillhole was targeted below the main artisanal workings, and encountered gold mineralization associated with the upper contact of a granodiorite hosted within mafic volcanic rocks. As the results to date indicate that gold mineralization appears directly proportional to the amount of pyrite present, additional ground exploration will be required prior to further drill testing at Adi Gozomo.

Diamond Drill Hole Results

DDH ID From (m) To (m) Interval (m)* Copper (%) Au (g/t) Ag (g/t) Zn (%) Prospect
TVD001 19.81 30.50 10.69 3.47 4.20 91 3.69 VTEM09
including 21.34 24.40 3.06 5.75 8.00 107 0.70
AD001 15.10 22.60 7.501 0.00 2.04 0 0.00 Adi Gozomo

* Intersection true widths are estimated at 60-90% of interval stated.

The Map


Airborne EM for VMS on ARMSTRONG BROOK PROJECT, NEW BRUNSWICK

Posted by on Friday, 31 May, 2013
The 2013 exploration program on the Armstrong Brook project commenced in early May. Highlights include the discovery of additional clusters of high-grade massive sulphide boulders in multiple locations (namely VMS Valley 4 & 5) and the completion of an airborne geophysical survey (VTEM) that identified intriguing anomalies in the vicinity of the primary boulder clusters.
The Armstrong Brook project comprises a number of high-grade polymetallic volcanogenic massive sulphide (VMS) prospects located in the Bathurst Mining Camp of northeastern New Brunswick, situated approximately 15 kilometres northwest of the Brunswick No. 12 Zn-Pb-Ag-Au deposit. Brunswick No. 12 is one of the world’s premier VMS deposits, having produced zinc, lead, silver and gold over a mine life of some 60 years.
VMS Valley 4:
The new discoveries at VMS Valley 4 occur as 2 boulder clusters located approximately 300 metres apart. Samples from the first cluster (AR13-0007-1 and 2) and the second cluster (AR13-0008-1 through 6), have returned high-grade mineralization with combined zinc+lead average assays of 13.68% and 10.33%, respectively, with impressive precious-metals as high as 459 grams per tonne silver and 1.07 grams per tonne gold. Complete assay results from the new boulder discoveries .
VMS Valley 5:
Additional prospecting has been completed in the vicinity of a recently discovered cluster of boulders located in the northwestern portion of the property. This work resulted in the discovery of 5 massive sulphide boulders in the vicinity of a discovery reported earlier in 2013, that yielded high-grade results with assays of up to 13.07% Zn, 6.07% Pb, 0.76% Cu, 251 g/t Ag and 0.66 g/t Au (see Wolfden news release dated March 20, 2013). These discoveries occur over an intermittent strike length of close to 700 metres and occur coincident to a significant geophysical anomaly that was identified in the recently completed VTEM airborne geophysical survey.
Assays remain pending for the new massive boulders from VMS Valley 5.
Preliminary results obtained from the VTEM survey indicate that the massive sulphide boulders are intimately associated with the eastern margin of a strong electromagnetic anomaly (EM conductor). This hook-shaped conductor attains a strike length of approximately 2 kilometres (see Image 1). Additionally, the cluster of massive sulphide boulders at VMS Valley 5 is centred within a broad circular-shaped magnetic high (total magnetic intensity) that has a radius of approximately 2.5 kilometres (see Image 2). Clearly, this anomaly requires detailed follow-up in the way of ground geophysical surveys prior to diamond drilling.

The 2013 exploration program on the Armstrong Brook project commenced in early May. Highlights include the discovery of additional clusters of high-grade massive sulphide boulders in multiple locations (namely VMS Valley 4 & 5) and the completion of an airborne geophysical survey (VTEM) that identified intriguing anomalies in the vicinity of the primary boulder clusters.The Armstrong Brook project comprises a number of high-grade polymetallic volcanogenic massive sulphide (VMS) prospects located in the Bathurst Mining Camp of northeastern New Brunswick, situated approximately 15 kilometres northwest of the Brunswick No. 12 Zn-Pb-Ag-Au deposit. Brunswick No. 12 is one of the world’s premier VMS deposits, having produced zinc, lead, silver and gold over a mine life of some 60 years.


Airborne EM and down-hole gravity for gold intersection in NW Ontario

Posted by on Thursday, 16 May, 2013

Northern Shield Resources Inc. announces the intersection of significant visible gold during the first phase of a 3,000 metre drilling program being carried out this spring at the Wabassi VMS (volcanogenic massive sulphide) project located in northwestern Ontario. The Wabassi project is being explored under a 49/51 JV with Discovery Harbor Resource Corp.

In the process of drill testing Anomaly “N” (a high priority VTEM conductor defining a massive sulfide target), a quartz-carbonate alteration zone with a veinlet of visible gold was intersected from 98.8 to 98.95 metres in drill-hole 13WA-33. The 0.15 metre sample assayed 2,530 g/t Au (73.8 ounces/ton). A second interval assayed 5.86 g/t Au over 1.1 metre from 100 to 101.1 meters. The auriferous zone appears to be related to an intermediate intrusive dike or sill and occurs at the contact of this intrusive and the altered mafic volcanic rocks. Photos of the core containing the gold veinlet can be seen on Northern Shield’s website at www.northern-shield.com.

This intersection of gold is the fourth gold discovery that has been made to date within the Wabassi-Tempest properties and the second to contain visible gold. Globally, gold mineralization is present in a majority of VMS districts.

In total, four drill holes were completed in the first phase of the program, which was aiming at testing three VTEM targets (K, M and N). No other significant mineralization was identified nor was anything intersected to explain the VTEM anomalies.

A down-hole gravity survey (Gravilog) was also recently completed by Abitibi Geophysics at Anomaly E. The results from the survey show dense masses in the subsurface that are coincident with and ‘off hole’ from drill intercepts where strong zinc-copper-silver mineralization is present. The upcoming drill program will include the testing of these newly defined targets at Anomaly E, including tests to determine whether the modeled shallow mineralization is present as well as the mineralization modeled at depth. Sketches representing 3D models of the gravity survey results are posted on Northern Shield’s website.

The second phase of drilling is planned to resume immediately after the spring breakup period, likely at the end of May, 2013. Much of the second phase will be focused on continuing to define the copper-zinc-silver-gold mineralization at “E.” This includes several gravity anomalies, which support previous geophysical interpretation that the mineralization extends at depth. Additional drilling will also be planned to test this exciting new gold discovery at “N”.

The Wabassi project is being overseen by Christine Vaillancourt, Chief Geologist for Northern Shield and a Qualified Person under National Instrument 43-101. The drilling was conducted by Vital Drilling Ltd. of Sudbury, Ontario. Samples were analyzed by ALS Minerals laboratories in Vancouver, BC for Au by fire assay with ICP-AES finish and base metals by four acid digestion and ICP-AES. Ore grade gold was analyzed with ALS’s Au-GRA21 method, a fire assay with gravimetric finish. Down-hole gravity was completed by Abitibi Geophysics Ltd. of Val d’Or, Quebec.

Northern Shield is an innovative, results-driven Canadian company focused on Platinum Group Element (PGE) and nickel-copper-(PGE) exploration in Canada and Greenland and copper-zinc-silver exploration on its Wabassi and Storm properties in northern Ontario. Its mission is to create a successful mineral exploration company through technical excellence and efficient management, where success is measured by the identification and development of high-quality mineral exploration projects, which may ultimately be optioned, sold or developed for maximum return on investment.


Drilling program after airborne geophysics for VMS

Posted by on Saturday, 8 December, 2012

VMS Ventures Inc.  announces plans for a 2013 winter drilling program on its 100% owned Manitoba properties.

Neil Richardson, VMS Ventures COO states: “We have many quality targets this winter, but we are particularly excited to get the drills turning on our newly acquired Reed East and Reed West properties. We consider them highly prospective as they cover a large area of the same volcanic rock package that hosts our high grade Reed Copper Deposit and Reed North base metal occurrences. VMS deposits tend to occur in clusters, within a specific package of these types of volcanic rocks.”

Diamond drilling is scheduled to begin in February and is expected to continue through April. Plans call for a budget of approximately $1.2 million which includes drilling 3,000 to 3,400 metres in 16 to 20 diamond drill holes. All target areas are within the Flin Flon – Snow Lake VMS greenstone belt of Manitoba.

Reed East and Reed West are adjacent to our Joint Venture property with Hudbay Minerals, which hosts the Reed Copper Deposit, currently being developed into a mine. These properties include targets with coincident Mobile Metal Ion (MMI) zinc anomalies and VTEM anomalies.

–             The other winter 2013 targets on VMS Ventures’ 100% owned properties vary in their specific characteristics, but all are associated with geophysical EM conductors generally with associated magnetic anomalies and within interpreted volcanic host rocks. More detail will be provided on these targets in the New Year.

Applications for drill permits have been submitted to the Manitoba government. After drilling is concluded, holes with favourable mineralization, alteration or geology, will be surveyed with down the hole TEM using Koop Geotechnical. Koop will utilize borehole pulse electromagnetic equipment manufactured by Crone Geophysics.


Geophysical surveys in Colombia for VMS

Posted by on Thursday, 18 October, 2012

CuOro Resources Corp. announces that Geotech Ltd. of Aurora, Ontario (“Geotech”) has been engaged to complete a 416 line-kilometre, helicopter-borne versatile time-domain electromagnetic (“VTEM”) survey of the Santa Elena Copper-Gold Project, in Antioquia Department, Colombia.

Geotech’s VTEM system has been shown to be excellent at identifying conductive, massive-sulphide bodies as well as mapping lateral and vertical variations in resistivity. The VTEM system is also equipped with a high sensitivity magnetometer which can aid in mapping geologic structure and lithology.

The survey is expected to be completed during October 2012. The Company will immediately investigate any targets generated by the survey with exploration and drilling.

Santa Elena Overview

Santa Elena is classified as a bimodal-mafic VMS deposit. This type of deposit is similar to that found in many of the major district of the Precambrian Shields of Canada, Western Australia, and Scandinavia, as well as the Urals and in the Cretaceous of Peru. The latter is comprised of the giant Tambo Grande deposits; TG1 and TG3, adjacent deposits comprising a single ore system contain a non 43-101 compliant resource of over 138 MT of 1.3% Cu and 1.1% Zn. The Tambo Grande deposits are in a very similar setting to the Santa Elena occurrence, and given that both are in what appears to be an oceanic back-arc setting, this district may be a model for Santa Elena. It is important to note that VMS deposits almost always occur in districts, and that their sizes are log-normally distributed.

The concessions contain 1,287.5 hectares near the north end of the Antioquia batholith, at the intersection between the San Pablo formation (Cretaceous marine sediments) located to the north, the basaltic volcanic flows located to the west, and the Antioquia batholith quartz-diorite complex to the east.

The infrastructure is excellent and includes paved road access, two hydroelectric plants within 5 km, and abundant water supply.

Geological mapping and sampling has identified 3 VMS areas of outcropping (TEM-1, TEM-2, and TEM-3) all of which coincide with historical geophysical anomalies. Several new mineralized outcrops have been located recently south of the known VMS outcrops.

Recently completed geophysical surveys have validated the historical data, as well as produced many new targets which will be drill tested.

Summary of Geophysics

A surface geophysical TEM survey at 50 m intervals was conducted on a selected area of the property where outcropping mineralization was visible. The survey was conducted by VAL D’OR Geophysics for Noranda Mining and Exploration Inc in 1996-1997.

The historical ground geophysics had identified 4 strong conductors with good vertical extent, 3 of which are coincident with the TEM-1, TEM-2, and TEM-3 outcrops.

An airborne magnetometer and radiometric survey was flown in August 2011. These surveys were followed-up by ground based induced polarization and resistivity surveys. These surveys validated the original survey data, and also generated several new drill targets which are currently being drill tested.

The company plans to initiate down-hole TEM surveys along with additional induced polarization and resistivity surveys in January 2012.


The New VMS Discovery in the Ring of Fire

Posted by on Thursday, 16 August, 2012

MacDonald Mines Exploration Inc. announces results from the most recent drill program on the Butler 3 target on its Butler property located just 36 kilometres west of the Big Daddy Chromite deposit.

  • The last drill program hit zinc-rich massive sulphide mineralization with tenors typical of past and current producing VMS mines – the zinc rich sulphides are generally found on the periphery of these types of deposits
  • VMS systems typically get more copper-rich the closer one gets to the centre of extrusion
  • VMS mineralization identified on the Property suggests there are multiple centres of extrusion, and therefore the potential for multiple VMS deposits (i.e. a VMS camp)
  • Geophysics indicates there is ample room for deposits in excess of 20 MT
  • Company geoscientists believe the constraining geologic markers bounding VMS mineralization have been identified on the Property, and that future exploration should be able to vector into more copper-rich mineralization.

Butler 3 Section Showing Mineralized Zones

Geophysical Model

The current geophysical data set includes:

  • Airborne, Surface and Borehole Time Domain EM
  • Airborne and Ground Magnetics
  • Surface and Airborne Gravity
  • IP and Complex Resistivity

A model of this data constrained by the current mineralized intersections, geochemistry and geology indicates the potential of the Butler Property to host not only VMS occurrences of size but also multiple centres.Plan maps of this compilation for Butler 2 and 3 are below.

Each occurrence consists of an underlying copper-rich stringer zone that is separated by a ~20m massive black felsic “marker” flow from several overlying horizons of zinc-silver-copper massive sulfide. The footwall rocks are all intensely altered, characterized by widespread sodium (Na) depletion and more localized manganese (Mn) enrichment (typical of VMS camps like Sturgeon Lake).


Drill Program after Interpretation of Airborne EM Data on Flin-Flon (Manitoba)

Posted by on Friday, 13 July, 2012

Foran Mining Corporation announces the results of a spring 2012 regional drill program (the “Regional Program”) on its  McIlvenna Bay and Bigstone properties.

The Regional Program consisted of a total of eight diamond drill holes (2,387 metres), with four holes drilled on each of the two properties. The Regional Program was designed as an initial test of the numerous electromagnetic conductors identified from the interpretation of a helicopter-borne, versatile time domain magnetic and electromagnetic (“VTEM”) survey completed by Foran in fall 2011 (see Foran news release dated November 23, 2011).

Results for the Regional Program were positive, with sulphide conductors intersected on both properties. Pyrrhotite-dominant volcanogenic massive sulphide (“VMS”) style mineralization and associated alteration was encountered, with minor amounts of base metal sulphides and locally elevated concentrations of zinc, copper, and gold.

Patrick Soares, President and CEO of Foran commented: “Encountering VMS-style mineralization and alteration in this limited initial test of conductors is very encouraging. The Regional Program was both a technical success and an endorsement of these methods towards the discovery of new zones of VMS mineralization in Foran’s large and highly prospective landholdings surrounding our 100% owned McIlvenna Bay VMS deposit.”

The McIlvenna Bay and Bigstone properties are located in east central Saskatchewan. The 20,382 hectare (“ha”) McIlvenna Bay property, which hosts Foran’s McIlvenna Bay deposit, is located 65 kilometres (“km”) west of Flin Flon, Manitoba. The 11,126 ha Bigstone property is located a further 25 km to the west. Past exploration by previous operators on the Bigstone property has outlined zones of both copper- and zinc-rich VMS mineralization, including a 2002 historic mineral resource at the Bigstone deposit.

The Regional Program was conducted between April 9, and May 5, 2012, following the successful completion of a winter 2012 drill program on the McIlvenna Bay deposit (see Foran news release dated June 4, 2012). The Regional Program was helicopter-supported due to unseasonably warm weather though the winter and spring.

McIlvenna Bay Property

Four holes (1,211 metres) were drilled to test VTEM conductors on the McIlvenna Bay property; the holes were collared 1 to 7 km away from Foran’s McIlvenna Bay deposit (Figure 1).

To view Figure 1: Location of Regional Program drill holes, please visit the following link:http://media3.marketwire.com/docs/FOMF1.pdf.

Drill holes MR-12-01 and -02 targeted stratigraphically discordant VTEM conductors up to 2 km east and southeast of the McIlvenna Bay deposit, within interpreted hangingwall stratigraphy. Both holes intersected iron sulphide-bearing iron formation and felsic tuffs with trace amounts of sphalerite and chalcopyrite. No significant assay results were obtained (Table 1).

Drill holes MR-12-03 and -04 targeted north-trending conductors with coincident magnetic highs. The holes were collared 830 metres apart and approximately 7 km southwest of the McIlvenna Bay deposit. Volcanic stratigraphy intersected in both holes appears to be upright, west facing and bimodal-pyroclastic in character. Intervals of iron sulphide-mineralized carbonaceous mudstone, siliceous exhalite and attendant silica-carbonate-amphibole+/-magnetite alteration were intersected in both drill holes. Sulphide mineralization consists principally of banded and brecciated pyrrhotite with local semi-massive (up to 35%) sulphide. These intervals contained lesser amounts of pyrite, with trace amounts of sphalerite and chalcopyrite. Locally elevated gold concentrations in the sulphide zones ranged up to 870 ppb Au (0.87 g/t Au) over 0.73 metres in MR-12-03, within a broader interval averaging 236 ppb Au (0.24 g/t Au) over 8.17 metres.

Bigstone Property

Drilling on the Bigstone property consisted of four holes (1,176 metres) targeting three north-south oriented VTEM conductor trends in the northern part of the property. This target area was previously tested in the 1970′s and 1980′s by predecessor companies and referred to historically as the Freeport Zone.

Regional Program drilling intersected iron sulphide-rich mineralized horizons in three of the four holes drilled, all of which contained traces amounts of sphalerite and chalcopyrite. Sulphide host rocks are felsic volcanic, within intermediate to mafic dominated volcanic stratigraphy.

Drill hole BG-12-01 tested the westernmost conductor trend. No significant base metal sulphide mineralization was noted in this hole, which ended in granite at a downhole depth of 324 metres.

Approximately 170 metres northeast of BG-12-01, drill holes BG-12-02 and BG-12-03 were drilled from a common collar location. These holes intersected several massive pyrrhotite-dominant sulphide horizons, each approximately 1 metre in downhole thickness, within an overall iron sulphide-mineralized felsic volcanic package ranging from 12 to 23 metres true thickness. In holes BG-12-02 and BG-12-03, iron sulphide mineralization began at downhole depths of 158.82 metres and 216.79 metres, respectively, and contained trace to 1% sphalerite-chalcopyrite within massive, semi-massive and finely laminated to disseminated pyrrhotite and lesser pyrite. Massive sulphides occur as a fine- to medium-grained matrix to rounded and sub-rounded felsic volcanic clasts. Footwall alteration to this zone is moderate intensity fracture- and foliation-controlled black chlorite.

Drill hole BG-12-04 intersected approximately 2 metres of semi-massive to massive iron sulphide starting at a downhole depth of 198.9 metres. Rounded felsic volcanic clasts occur in massive pyrrhotite with lesser pyrite and trace to 1% sphalerite-chalcopyrite.

Past exploration by previous operators on the Bigstone property has outlined zones of both copper- and zinc-rich VMS mineralization. In 2002, Aur Resources Inc. outlined a mineral resource at the Bigstone deposit in the southern part of the property, with 1.45 million tonnes grading 2.90% Cu in a copper-rich zone and 308,000 tonnes grading 11.2% Zn in a separate zinc-rich zone. The Bigstone deposit mineral resource is historic and the Company is not treating it as current; Foran has not done sufficient work to classify it as a current resource estimate. A program of drill hole re-surveying, re-logging and drill core QAQC is required to qualify the historic resource and identify areas for expansion through exploration drilling. The Bigstone property is subject to a back-in held by Teck Resources Ltd.


Mining IQ: airborne TEM for VMS discoveries

Posted by on Friday, 1 June, 2012

Mining IQ recently interview Neil Richardson, P. Geo. Chief Operating Officer. In this interview Neil speaks frankly about new advancements in exploration technology as well as the impact of VTEM on their current projects.

What is your role at VMS and experience?

I am the COO and oversee all the exploration for VMS.  I have over 24 years’ experience in the exploration and mining business – in Manitoba as well as Ontario. I have also worked in the volcanic terrain up in Manitoba for the last 18 years.

How and why did you embark on a career in mining?

I started off in a small mining town and got involved in staking claims and helping the guys blaze and cut lines and that got me interested in the geology side of things. From there I went to college and got my geology certificate and my career in the industry.

In terms of exploration – can you comment on insights from your current projects?

With respect to our Reed Copper project – which is our flagship project – we are currently under JV with HudBay Minerals. Percentage wise it splits 70% them and 30% us. We are carried to production in that project, and have recently announced a preliminary feasibility study that came out early earlier in the year.  We are delighted to have shown the project is robust, so we are looking forward to production in early 2014 and reaping some of the benefits for the next 6-7 years of production.

Are you using VTEM technology on these projects and why?

The Reed Copper deposit was a VTEM(Versatile Time-domain electromagnetic) anomaly discovery. There are lots of systems out there (we use Geotech’s platform) to choose from so you have to determine which one is right for you. What mattered to us was a good noise to data ratio so you don’t get a lot of noise in the data. We selected on that basis and continue to use it.

What is VTEM technology? And why is it revolutionizing the way you and others are conducting your exploration activities?

It works by using a very low flying and slow flying helicopter that charges a current into the ground and that current generates an electromagnetic field.

The sulphides themselves are conductors and generate their own EM field – and then when the current is cut off the sulphide bodies emit their own electrical current decay field and that’s how anomalies are measured. Where sulphides are not present, no electrical field is present, therefor no anomaly, but when you fly over a sulphide body (or even graphite) they emit their own EM field,  so you can detect these EM anomalies.

Massive sulphide bodies are very conductive and have little to no resistance. It’s like having a piece of wire except it’s in a rock mass and that’s how well the EM current will flow.

How does that affect exploration activities?

These anomalies are unusual and when we find them we are then able to plan our drilling. Graphite also is a good conductor and this presents a challenge for a geologist who has to differentiate between graphite and sulphide anomalies. There is no geophysical way to differentiate between the two types of anomalies.. However, there are a number of ways you can assess a target – look at historical drilling in the area, regional geology etc. that might help prioritise some targets.

Also a lot of the deposits are occurring with a magnetic anomaly too and you can also use that as criteria to assist you in deciding which target to drill first. So you can decide to drill where there is EM and Mag or just EM. Chances are that you will go with the EM and Mag target first.

Using this technology you are able to be more focused and targeted with your exploration activities?

Exactly.  It also helps to hone in on your property package significantly. If you are looking for VMS (volcanic hosted massive sulphide deposits) in particular areas where there are no anomalies tell you that the top 200 – 300 metres of the rock formations don’t have any EM anomalies, therefore no massive sulphides, so very quickly you can look at just focusing on select regions in your property packages. It helps with efficiency and productivity of exploration.

It tells you that there is something interesting there / something out of the ordinary and something electromagnetically is causing that anomaly and response. It could be a mix of many things – it could be a mixture of sulphide bodies, or sulphide bodies with graphite or mixture of sulphide bodies with ore bearing minerals.  If you are above the Paleozoic cover (dolomite) then you can prospect your targets, but if they are below the dolomititic rock you are forced to drill it or apply soil geochemistry over the top of the anomalies to see if you can decipher the responses.

What’s the potential for VTEM in terms of future opportunities?

It’s going to become more widely used. Lots of systems are now out there and they are all really applicable and useful. These guys will be able to generate more powerful instruments and work on the data to noise ratio – and with that in mind we might be able to see a bit deeper with more surveys. Also if we have VTEM anomalies we are able to go over the ground and do ‘time domain EM survey’s – and this means that we can generate even deeper power because you are actually on the ground generating large loops of EM current to detect deposits.

Any final tips and tricks you’d like to share based on your experience of using this type of survey technology?

No tricks but some tips…always match your survey method to your deposit model especially geophysically. If you are looking for massive sulphide you should always use EM. You might even want to look at some frequency EM surveys instead of just time domain EM but match the method to your deposit model. Also be clear on the type of target you are looking for.

Mining IQ thanks Neil.For more information about VMS Ventures please visit: http://www.vmsventures.com/

More about Neil:

Neil has over 24 years’ experience in mineral exploration and mining operations of base metal and precious metal deposits throughout Canada. Neil was most recently the Manager of Exploration for Murgor Resources Inc. where he was responsible for delineation of two projects to National Instrument 43-101 compliant mineral resource estimates, project generation, process discipline and corporate growth strategies. Prior to joining Murgor in 2006, Neil worked for HudBay Minerals Inc as a Senior Exploration Geologist responsible for greenfield and brownfield projects in the Flin Flon – Snow Lake area. He was part of a team that discovered a number of new mineralized zones throughout the belt. He also has past experience as a Senior Mine Geologist with extensive background in resource – reserve estimations and operations. He is a member of the Association of Professional Engineers and Geoscientists of Manitoba.


Downhole Geophysics at Melchett Lake

Posted by on Friday, 13 April, 2012
Anconia Resources Corp.  provides an overview of the Melchett Lake Property as well as the results of a recent down the hole BHTEM survey. The Property covers a strike length of 16 km of highly prospective sulphide bearing volcanogenic massive sulphide (VMS) stratigraphy. A whole rock geochemical survey of the Property has identified two areas situated along this strike length that maintain major element alteration and anomalous minor element (Zn, Pb, Ag, & Cu) concentrations characteristically associated with VMS deposits and more specifically with being proximal to a source vent within a VMS genetic model. These two areas are referred to as the Relf Zone (North and South areas) and the Nakina Zone. Of these two areas of interest, the most extensive and detailed exploration has historically been carried out over the Relf South Zone.
Jason Brewster, President of Anconia commented “The down the hole BHTEM survey that we have recently completed has supported the exploration model developed on the Melchett Lake Property. This survey encourages Anconia to continue exploration on this property, as it indicates potential proximity to a VMS source”.
At the Relf South Zone, which was initially detailed by surface geologic mapping and whole rock geochemistry, stratiform Zn mineralization and intense hydrothermal alteration characteristically associated with VMS deposits has been documented. In 1983 a shallow drill hole (KAR-03) was completed to intersect the down dip extension of the Relf South Zone. This drilling identified a “mineralized sequence”, approximately 150m in true thickness, of intensely altered and mineralized (Zn) felsic volcanics. The center of the intersection of KAR-03 with the “mineralized sequence” is approximately 150m below surface. Within the “mineralized sequence” 5 distinct Zn rich stratigraphic horizons (Units 1 through 5) were identified (KAR-03 in Table 1). There was no geophysical, airborne or ground magnetics or EM, over the surface expression of the Relf South Zone, however, whole rock geochemistry indicated that alteration and mineralization were increasing down dip.
In 2007 one drill hole (SB-07-01 619m in length) was completed to investigate the apparent down dip extension of the increasing alteration and mineralization. The drill hole was spotted to intersect the center of the “mineralized sequence” directly underneath the Relf South Zone, at approximately 375m below surface. The whole rock geochemistry of the felsic volcanics indicated that alteration within the “mineralized sequence” in this hole was more intense than that reported in the near surface drillhole KAR-03. Within the “mineralized sequence” the 5 stratigraphically controlled geochemically Zn enriched horizons were again identified. Concentration of Zn in these horizons was more anomalous than in drill hole KAR-03 (see SB-07-01 in Table 1). Geochemically anomalous Cu mineralization was also reported sporadically within the immediate footwall to the “mineralized sequence”. A down the hole BHTEM survey was completed on hole SB-07-01. There were no in hole conductors, either related to the Zn horizons within the “mineralized sequence” nor the Cu mineralization in the immediate footwall felsic volcanics were identified. However, one significant moderate intensity anomaly was detected off the bottom of hole SB-07-01 and was interpreted to be located 100m to the east.
A follow up drill hole (SB-08-02 688m in length) was completed in 2008 to investigate the causative source of the off hole conductor previously identified, which intersected the center of the “mineralized sequence” at approximately 350m below surface. Whole rock geochemistry of the felsic volcanics “mineralized sequence” were found to be more intense than either KAR-03 or SB-07-01 indicating a possibly increasing proximity to a source vent. The richest Zn mineralization intersected to date was reported in drill hole SB-08-02 (Table 1), which also indicates an increasing proximity to a source vent. Anomalous Cu mineralization was also reported within the immediate footwall to the “mineralized sequence” in drillhole SB-08-02 (Table 1). The Cu mineralization within the footwall felsic volcanics was characterized by fine interconnected veinlets of chalcopyrite, which is consistent with a stockwork zone found to underlie VMS deposits. This drill hole was not investigated by down the hole BHTEM at the time, so the causative source of the off hole conductor identified in hole SB-07-01 remained unresolved.
In 2012, Anconia completed a down the hole BHTEM survey of drill hole SB-08-02. That survey identified numerous conductive zones. Within the “mineralized sequence” conductive zones were found to be directly related to Zn enriched horizons Unit 1, 2, 3 and 4. These findings are the first reported incidence of increased conductivity related to the Zn stratiform mineralization. Within the footwall felsic volcanics 5 conductive zones were identified. Of these, 4 are directly related to increased Cu mineralization (veinlets of chalcopyrite) (Table 1). One of these conductive zones, Conductor 8, situated between 550m and 560m is believed to be the causative source of the off hole conductor previously identified in drill hole SB-07-01. One final conductor (Conductor 10 Table 1) was identified as lying off the end of drillhole SB-08-02. The causative source of this conductor is believed to be to the east of the hole.
In summary, the intensity of hydrothermal alteration characteristically associated with VMS deposits is increasing with depth down plunge below SB-08-02 as is the concentration and thickness of the Zn enriched stratigraphic units found within the “mineralized sequence”. The increased Cu concentration within the footwall felsic volcanic sequence and reports of veinlets of chalcopyrite are further indicators of an increasing proximity to a source vent stockwork zone. Contouring of the depositional basin defined by the footwall and “mineralized sequence” contact indicates that the basin is also increasing in depth down plunge, a location where economic concentrations of massive sulphides would typically be found. Further investigation of the mineralization, both the Zn rich stratigraphic Units 1 through 5 as well as the footwall “stockwork” like Cu mineralization down plunge, is planned for 2012.