Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42A05SE00065

Record: MDI42A05SE00065

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Thorneloe

Latitude: 48° 21' 3.07"    Longitude: -81° 32' 57.45"

UTM Zone: 17    Easting: 459304   Northing: 5355443    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 42A05SE

Point Location Description: Centre of cluster of drill holes

Location Method: Other Literature

Access Description: Easy all weather access is provided by highway 101 and highway 144. A dirt road which follws along the north side of the Tatachikapika River provides access to the interior of the west part of the property. A dirt road off highway 144 south of the Tatachikapika river provieds access to the central portion of the east part of the Thorne property.

Exploration History

1995-2004: Band-Ore Resources Ltd. - 90 ddh ( 25,595 m), ground geophysics, airborne geophysics. 2006-2009: West Timmins Mining Corp. – airborne geophysics, DD-54. 2010-2012: Lake Shore Gold Corp. – DD-89, assays

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Abitibi

Geological Age: Neoarchean  

Geology Comments

Jun 25, 2012 (A Wilson) - The Band-Ore Horizon lies approximately 150 m south of the Kapika Zone and lies between Band-Ore gridlines L16+45E to L60+00E. Gold mineralization is hosted by Archean-aged clastic metasediments, consisting of near vertical silstones, thickly bedded argillites, arenite and conglomerates with minor quartz-feldspar porphyries. The zone is a highly altered silicified, sericitized and carbonatized zone with pyrite and arsenopyrite mineralization. there appears to be a broad envelope of sericite ankerite alteration surrounding the gold zones with minor fuchsite, montmorillonite and quartz-ankerite veining. The Property is situated in the western portion of the Archean, Abitibi Greenstone Belt and is predominately underlain by metasedimentary rocks belonging to the Porcupine assemblage. This metasedimentary basin is bound to the north and west by metavolcanic rocks of the Tisdale assemblage. The Archean rock units are variably metamorphosed from greenschist to amphibolites facies. To the east is the northward trending Mattagami Fault. Major structures on the property include the east-west trending Porcupine-Destor Fault Zone (“DPFZ”) which crosses near the south boundary and the Gold River Trend, an intensely altered gold bearing deformation which is located two (2) kilometers to the north. The Gold River Trend has been traced for approximately five (5) kilometers across the Property and is the key host for gold mineralization identified at the property to date. Both the DPFZ and the Gold River Trend have been cross cut by the major north-south trending Mattagami River Fault. Displacement along the Mattagami River Fault has not been confirmed but current interpretations suggest rock units west of the fault and underlying the Lake Shore property have been moved downwards and to the south relative to those on the east which extend in to the main part of the historic Timmins mining camp.

Lithology

Lithology Comments

Jun 25, 2012 (A Wilson) - Gold mineralization is hosted within arsenopyrite-pyrite-ankerite-quartz veins and appears to be strongest proximal to porphyry contacts, although some mineralization occurs within sericitic and carbonate altered pyritic porphyries. Mineralized zones occur within a broad alteration deformation zone. Two mineralized zones are ideintified, the Footwall and Hangingwall Zones. Existing resources in the Gold River west area are contained on the north and south margins of a swarm of porphyry dikes. The Gold River Trend lies approximately 2 km north of the Destor-Porcupine Fault Zone and surrounds an east trending, steeply northward dipping contact between volcanic and sedimentary rocks. Mineralization is contained in multiple zones located immediately to the south of the contact and closely associated with quartz-feldspar popphyry dikes, dark grey quartz veining, increased pyrite/arsenopyrite and and local vible gold. The mineralized zones have a minimum strike length of over 2 km and have a vertical depth of 1050 m.

Mineralization

Mineralization Comments

Jun 25, 2012 (A Wilson) - Lake Shore's drill hole TH-10-62 intersected 5.04 g/t Au over 16.60 m within a broad envelope grading 2.18 g/t over 45.00m. TH-10-048 intrsected 11.78 g/t Au over 1.7 m and 6.64 g/t Au over 2.3 m. The bulk of significant gold mineralization at the property is contained within two main deposits referred to as the Gold River East Deposit and the Gold River West Deposit, which are located on a three (3.3) km strike length of the Gold River Trend, which straddles the Tatachikapika River. Gold mineralization within the deposits generally occurs as stacked sets of steeply dipping irregular lenses which can vary from less than one metre up to about five (5) metres in width, from one hundred (100) to over four hundred (400) metres in vertical height and from (fifty (50) to six hundred (600) metres in strike length. Most mineralization identified to date occurs between surface and five hundred (500) metres below but has been traced with a few broadly spaced holes to as deep as 1,050 metres below surface, with several of the zones remaining open. Gold mineralization within the zones is associated with areas of broad disseminated and quartz vein- related arsenopyrite and pyrite mineralization, which varies from less than one percent to greater than twenty (20) percent, locally. Traces of pyrrhotite, tetrahedrite, stibnite, sphalerite, berthierite, boulangerite, zinkenite as well as native gold and native antimony have also been reported. Lake Shore Gold has included the following zones identified by Band-Ore and West Timmins Mining in the East Zone (Footwall and Hanging wall).

Mineral Record Details

Mineral Zones - Size and Shape

References

Map - Geological series, Precambrian geology of Thorneloe Township, Cochrane District

Publication Number: P2502 Scale: 1:15,840    Date: 1982

Author: Choudhry A.G.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - The geology of Keefer, Denton and Thorneloe townships, District of Cochrane

Publication Number: OFR5699 Date: 1989

Author: Choudhry A.G.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological Compilation of the Timmins Area, Abitibi Greenstone Belt

Publication Number: P3379 Scale: 1:100,000    Date: 1998

Author: Ayer J.A., Trowell N.F.

Publisher Name:

Location:

Publication - Summary Report On The Thorne Property

Publication Number: 43-101 Date: 2002

Author: G. Cavey

Publisher Name:

Location: Timmins RGP

Publication - Updated Geological Report on the Thorne Property

Publication Number: 43-101 (2) Date: 2002

Author: Cavey, G.

Publisher Name:

Location: Timmins RGP

Publication - Band-Ore Resources Ltd.

Publication Number: clippings Date: 1996

Author:

Publisher Name:

Location: Timmins RGP

Publication - Lake Shore Gold Corp.

Publication Number: clippings Date: 2011

Author:

Publisher Name:

Location: Timmins RGO

Publication - West Timmins Mining Inc.

Publication Number: clippings Date: 2009

Author:

Publisher Name:

Location: Timmins RGO

Publication - Preliminary Economic Assessment And Updated Mineral Resource Estimate For Timmins West Mine, Timmins, Ontario, Canada, 493p.

Publication Number: NI 43-101 Date: 2012

Author: D. Crick, R. Koch, R. Kusins, D. Powers, B. Buss

Publisher Name:

Location: Timmins RGP

Publication - Technical Report On The Update Of Mineral Resource Estimate For The Gold River Property, Thorneloe Township, Timmins, Ontario, 289p

Publication Number: NI 43-101 Date: 2012

Author: J. Samson, R. Kusins, D. Powers

Publisher Name:

Location: Timmins RGP

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Ministry Contact Information

For detailed information regarding this mineral record please contact the Timmins Resident Geologist District Office