Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52O08SW00007

Record: MDI52O08SW00007

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Little Ochig Lake Area

Latitude: 51° 16' 11.83"    Longitude: -90° 23' 19.94"

UTM Zone: 15    Easting: 682143   Northing: 5683083.99    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O08SW

Point Location Description: Diamond drill holes

Location Method: Conversion from MDI

Access Description: This occurrence is located about 25 km south-southwest of Pickle Lake. It strikes east about 680 m north of the southern tip of the central peninsula of Kasagiminnis Lake. Kasagiminnis Lake is often too shallow for float-equipped aircraft and is best accessed by helicopter or, in winter, ski-equipped aircraft.

Exploration History

1984: Moss Resources Ltd. staked the property. 1985: Moss Resources Ltd. commissioned an airborne mag and EM survey over an area including the occurrence. 1986: Power Explorations Inc. signed a joint venture agreement with Moss Resources and conducted ground mag and EM surveys, geological mapping and rock and soil geochemical sampling on a claim group covering this occurrence. 1986, 1987, and 1988: Power Explorations Inc. completed 2 diamond-drilling programs on a claim group covering this occurrence. The drilling totalled 9592.67 m in 88 holes. This deposit was intersected in drill hole KAS-87-3. 2004: McVicar Resources Inc. conducted a high-resolution aeromagnetics survey. 2005: Trillium North Minerals Ltd. staked the property. 2007: Fladgate Exploration Consulting Corp. visited the property on behalf of Trillium and mapped some of the historic trenches and conducted due diligence field checks. 2009: Manicouagan Minerals Inc. (MAM) entered into a joint venture option agreement with Trillium for MAM to earn up to 70% of the interest in the property. MAM flew a helicopter-borne magnetic survey, surveyed historic drill collars, and conducted sampling and field checks of historic geological mapping. 2010: MAM earned an initial 51% interest in the property and conducted line-cutting, soil sampling, geological mapping, and EM geophysical surveys. 2011: MAM drilled 14 DDH totalling 2059 m. 2014: Trillium North changed its name to White Metal Resources Corp. Manicouagan Minerals and Flemish Gold Corp. merged to form Murchison Minerals Ltd. 2018: Ardiden Ltd. acquired the property from White Metal and drilled 15 DDH totalling 1870.5 m. 2019: Ardiden released a maiden mineral resource on the property.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Meen-Dempster

Geological Age: Neoarchean  

Geology Comments

Dec 07, 2005 (B Nelson) - The Kasagiminnis Lake prospect is situated within a 1.6 km wide east-trending segment of greenstone belt sandwiched between the Kasagiminnis Lake Pluton to the north and the Carling Lake Batholith to the south. The segment of greenstone belt consists of a sequence of south-facing, slightly overturned, mafic metavolcanic flows interlayered with mafic to felsic pyroclastics, metasediments and lean oxide-facies iron formation with possible local silicate-facies iron formation. Gabbroic amphibolites, pegmatites, and the occasional felsic dyke are intrusive to the volcanic-sedimentary sequence. The deposit geology, due to the scarcity of outcrop, is interpreted for the most part from diamond-drill core. The rock sequence through the gold deposit from the hanging wall on the north to the footwall on the south, is as follows: 1. Interlayered mafic metavolcanics and felsic pyroclastics. 2. Intermediate to felsic tuffs and crystal tuffs. 3. Mafic metavolcanic tuff and (or) amphibolite. 4. The mineralized zone. 5. Footwall quartz-carbonate veinlet zone. 6. Footwall mafic metavolcanics. The mineralized zone is a 10 to 13 m wide interval of mafic metavolcanic tuffs interlayered with lean iron formation. The zone is sheared and silicified and contains varying concentrations of secondary pyrrhotite. It is commonly garnetiferous. The gold content appears to be directly related to the pyrrhotite concentration, which varies from 1% to 5%, but is locally greater than 50% of the rock. The pyrrhotite is disseminated and has a feather texture. Occasionally, quartz-carbonate veinlets, rimmed by amphibole and grunerite, also carry gold. Grunerite is common throughout the mineralized section.

Apr 17, 2015 (Therese Pettigrew) - The portion of the Dempster-Pickle Lake greenstone belt exposed on the property has been compressed between two grantitic bodies, the Kasagiminnis Lake and Carling Granite Plutons, on the north and south respectively, resulting in a narrowing of the belt to approximately 1.5 km in width. High angle faults, interpreted from geological and geophysical data, crosscut the volcano-sedimentary sequence and trend NE-SW and NW-SE. Pervasive shearing and small-scale folding is probably related to a regional tectonic event (AFRI 2.50055).

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - The hanging wall unit is identified as a fine-grained dacite to rhyodacite tuff. Silicification and sericitization make the unit appear rhyolitic. The mafic metavolcanic tuff and (or) amphibolite unit may be a sill-like intrusion or a thin mafic tuff. It contains 1 to 3% fine, disseminated, acicular magnetite. The unit grades into the mineralized zone where it is interlayered with lean chert-magnetite iron formation. The unit is auriferous where the magnetite is replaced by pyrrhotite. Magnetite and pyrrhotite are mutually exclusive of one another. The footwall quartz-carbonate veinlet zone usually occurs within mafic metavolcanics, but locally incorporates minor iron formation. The quartz-calcite veinlets are similar to those that carry gold in the mineralized zone. The footwall zone contains minor, secondary pyrrhotite and subeconomic concentrations of gold. The footwall mafic metavolcanics are tuffs and (or) flows, which appear to be similar to the mafic metavolcanic tuffs and (or) amphibolites of the hanging wall rocks, are foliated with a fine- to medium-grained crystalloblastic texture, but are otherwise featureless. To date, 25 diamond-drill holes have intersected the mineralized zone.

Mineralization

Mineralization Comments

Jan 29, 2019 (B Nelson) - Preliminary mineral inventory indicates reserves of 1 080 000 tonnes averaging 6.51 g/t Au (0.19 oz/ton Au). Drill hole KAS-87-6 intersected a 4.23 m thick 'transition-sulphide zone' at the contact between a mafic metavolcanic flow and a felsic pyroclastic. Significant gold assays were reported for samples from the upper and lower contacts of the 'transition-sulphide zone.' The mafic metavolcanics above the zone contain many chlorite-biotite-garnet alteration bands. The felsic pyroclastic below the zone are sericitic and also contain garnet, chlorite and biotite. The 'transition-sulphide zone' is described in the drill log as a gradational contact and is presumably mostly within the mafic metavolcanic. It is mineralized with 10% to 20% pyrrhotite and pyrite. The two significant assays in KAS-87-6 are: From 92.14 m to 93.57 m (1.43 m total), 0.58 oz/ton Au. From 95.10 m to 96.38 m (1.28 m total), 1.40 oz/ton Au. The intervening sample interval between the 2 significant assays returned trace gold.

Apr 17, 2015 (Therese Pettigrew) - KAS-87-3: gold values ranging from 0.01 to 0.23 opt Au over a 38.9 ft intersection. KAS-87-6: gold values of 0.58 opt Au over 4.7 feet and 1.40 opt Au over 4.2 ft. KAS-87-31: 0.58 opt Au over 4.2 ft. During the 1987 surface mapping program, gold mineralization was encountered in a quartz vein and adjacent silicified and sheared mafic volcanics, 400 ft west of drillhole KAS-87-3. Gold values ranged from 5056 to 18,520 ppb (approx. 0.25 opt) over 6.2 ft. KAS-88-6: values averaging 0.22 opt Au. KAS-88-7: values of 0.23 opt Au over 2.0 ft. Each of the 7 holes drilled in the 2011 drill program that reached their targeted depth successfully encountered the “Kasagiminnis Gold Zone.” Gold mineralization in the Kasagiminnis Gold Zone is associated with silicification and disseminated sulphides (pyrite, pyrrhotite) along with magnetite which the historically was called “iron formation”. Significant results from the drill program included 7.9 metres grading 7.24 gpt Au over 6.60 m including 1.9 metres at 12.70 gpt Au in hole KAS-11-04. KAS-11-06: 6.24 gpt Au over 1.4 m from 98.3-99.7 m. KAS-11-07: 6.95 gpt Au over 0.8 m from 27.7-28.5 m. KAS-11-09: 5.80 gpt Au over 1.5 m from 54.2-55.7 m. KAS-11-11: 5.64 gpt Au over 1 m from 229.7-230.7 m. KAS-11-14: 5.85 gpt Au over 1 m from 233.8-234.8 m and 6.21 gpt Au over 1.0 m from 240.0-241.0 m (AFRI 2.50055). The mineralized zone is a 10-13 m wide interval of mafic metavolcanic tuffs interlayered with lean iron formation. The zone is sheared and silicified, and contains varying concentrations of secondary pyrrhotite. It is commonly garnetiferous. The gold content appears to be directly related to the pyrrhotite concentration, which varies from 1-5%, but is locally greater than 50% of the rock. The pyrrhotite is disseminated and has a feather texture. Occasionally quartz-carbonate veinlets, rimmed by amphibole and grunerite, also carry gold. A few specks of visible gold have been observed along the veinlet contacts. Grunerite is common throughout the mineralized section (Seim, 1993).

Mineral Record Details

Mineral Zones - Size and Shape

References

Publication - Technical Report on Three Gold Exploration Properties, Pickle Lake Area, Ontario, Canada for Manicouagan Minerals Inc.

Publication Number: 2009 43-101 Date: 2009

Author: Harron, G.A.

Publisher Name: G.A. Harron & Associates Inc. for Manicouagan Minerals

Location: SEDAR

Mono - Mineral Deposits of the Central Portion of Uchi Subprovince, Volume 1, Meen Lake to Kesagiminnis Lake Portion

Publication Number: OFR5869 Page: 379-385  Date: 1993

Author: Seim G.Wm.

Publisher Name: Ontario Geological Survey

Location:

Publication - Kasagiminnis Gold Deposit - Mineral Resource

Publication Number: 2019 Tech Rep Date: 2019

Author: Standing, C., and Drabble, M.

Publisher Name: Optiro for Ardiden Ltd.

Location: http://www.ardiden.com.au

Compend - Report of activities, 1988, Resident Geologists

Publication Number: MP142 Page: 65-91  Date: 1989

Author: Fenwick K.G., Giblin P.E., Pitts A.E.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Operation Pickle Lake, Achapi Lake-Misehkow River, districts of Kenora (Patricia Portion) and Thunder Bay

Publication Number: P0809 Scale: 1:126,720    Date: 1973

Author: Sage R.P., Breaks F.W., Troup W.R.

Publisher Name: Ontario Division of Mines

Location:

Map - Geological series, Precambrian geology, Pickle Lake area, western part

Publication Number: P3056 Scale: 1:50,000    Date: 1989

Author: Stott G.M., Brown G.H., Coleman V.J., Green G.M., Reilly B.A.

Publisher Name: Ontario Geological Survey

Location:

Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts

Publication Number: M2218 Scale: 1:253,440    Date: 1976

Author: Sage R.P., Breaks F.W., Troup W.R.

Publisher Name: Ontario Division of Mines

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office