Ontario Geological Survey
Permanent Link to this Record:
MDI42A05NE00121
| Record Name(s) | 144 Gap Deposit - 2016, Golden River East Zones - 1996, Thorne East Zone - 1996, Band-Ore Horizon - 1996, Band-Ore DDH TH 96-12 - 1996, Thorne Property - 1994, Gold River Trend Project - 2010 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 2004-Aug-27 |
| Date Last Modified | 2022-Jul-15 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Thorneloe
Latitude: 48° 21' 2.31" Longitude: -81° 31' 16.71"
UTM Zone: 17 Easting: 461377 Northing: 5355405 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42A05SE
Point Location Description: Approximate centre of cluster of drill holes (Golden River East zones)
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.
1994-2004: Band-Ore Resources Ltd. - 243 ddh ( 67,491 m), ground geophysics, airborne geophysics. 2006-2009: West Timmins Mining Corp. - airborne geophysics, DD-58. 2010-2015: Lake Shore Gold Corp. - DD-342-235 173 m, modelling, resource calculation.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-3136 / 42A05SE0038 | 42A05SE0038 | 42A05SE0038 |
| T-3136 / 42A06SW0025 | 42A06SW0025 | 42A06SW0025 |
| T-5297 /2.31644 | 20000014935 | 20000014935 |
| T-6462/ 2.52555 | 20000014953 | 20000014953 |
| T-3136 / W9660-00068 | 42A05SE0015 | 42A05SE0015 |
| T-3947 / 42A06SW2006 | 42A06SW2006 | 42A06SW2006 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Neoarchean
Feb 09, 2016 (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 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 porphyry dikes, dark grey quartz veining, increased pyrite/arsenopyrite and local visible gold. The mineralized zones have a minimum strike length of over 2 km and have a vertical depth of 1050 m.
| Rock Type | Rank | Composition | Texture | Relationship | Quartz-Feldspar Porphyry | 1 | Quartz-Feldspar | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host | |
| Conglomerate | 3 | Near | ||
| Siltstone | 4 | Near | ||
| Schist-Unsubdivided | 5 | Sericite-Carbonate | Host |
Nov 15, 2011 (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. The main zone has been subdivided into a series of sub-zones. Zones within Golden East Zone include: South Limb, Core (Plum), South Limb, Lower Fault Zone, North Porphyry system, Main Zone, Small Zone, Diabase Zone, West Zone and 4800E zone. The Gold River Trend varies from 50 to 200 metres in width and is dominated by strongly sheared and hydrothermally altered sedimentary and volcanic rocks which have been intruded by lenses of porphyry. Work to date indicates that at least 15 different zones of gold mineralization exist with potential for being defined as narrow high grade or wide bulk resources. In most cases the mineralization is closely associated with pyrite-arsenopyrite-ankerite-quartz veins.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Arsenopyrite | Economic | Ore | ||||
| 6 | Sphalerite | Economic | Ore | ||||
| 4 | Stibnite | Economic | Gangue | ||||
| 5 | Tetrahedrite | Economic | Gangue |
Jun 22, 2012 (A Wilson) - The gold appears to be contemporaneous with the arsenopyrite-pyrite mineralization. The gold is extremely fine-grained and is rarely observed without a microscope. Visbile gold was reported in only a few drill holes with high gold intercepts such as 2.85 g/t Au over 1m (TH-97-222), 16.0 g/t Au over 1 m in TH-97-223). Mineralization in the Thorne East Zone is subivided into the South Limb, Plum (Core) and Nose zones. Diamond drilling by Lake Shore Gold Mines intersected 5.52 gt Au over 5.4 m (including 21.96 g/t Au over 1.25 m), 10.46 g/t Au over 9 m (including 85.70 g/t Au over 1 m) and 4.97 g/t Au over 6 m (including 18.55 g/t Au over 1 m in TH10-06). 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 (South Limb, Plum, Nost, Main, Small, Diabase, West, South Limb-East, 4500E, 4800E and North Porphyry).
| Rank | Classification |
|---|---|
| 1 | Mesothermal |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 1800 | 100 | 850 |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| 144 Gap Deposit | 2016 | Inferred Mineral Resource | 1914000 | Lake Shore Gold Corp. press release 8-Feb-2016 | 319 200 ounces Au | Gold 5.19 Grams per Tonne |
| 144 Gap Deposit | 2016 | Indicated Mineral Resource | 1734000 | Lake Shore Gold Corp. press release 8-Feb-2016 | 301 700 ounces Au | Gold 5.41 Ounces |
| Gold River East | 2012 | Inferred Mineral Resource | 4317000 | Lake Shore Gold Corp., press release 22/02/2012 | Gold 6.39 Grams per Tonne | |
| Gold River Trend | 2012 | Inferred Mineral Resource | 5273000 | 43-101 report,31/01/2012 | Gold 6.06 Grams per Tonne | |
| Gold River Trend | 2012 | Measured Mineral Resource | 690000 | 43-101 report,31/01/2012 | Gold 5.29 Grams per Tonne | |
| Gold River East | 2012 | Indicated Mineral Resource | 597000 | Lake Shore Gold Corp., press release 22/02/2012 | Gold 5.42 Grams per Tonne | |
| East Zone | 1998 | Inferred Mineral Resource | 1050487 | 43-101 Report, June 30/2002; 3 zones in east zones | total for all zones on Thorne Property 4,154,096 tonnes @3.33 g/t Au | Gold 2.78 Grams per Tonne |
| Gold River Trend | 1997 | Inferred Mineral Resource | 4154096 | Lake Shore Gold website 05-11-2011 | 444,471 contained ounces | Gold 3.33 Grams per Tonne |
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:
Book - Updated Geological Report On The Thorne Property, NI 43-101 Document, 34 p.
Publication Number: 43-101 Date: 2002
Author: G. Cavey
Publisher Name:
Location: Timmins RGP
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:
Book - Summary Report On Thorne Property, NI 43-101 Report, 56p.
Publication Number: 43-101(2) Date: 2002
Author: G. Cavey
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 Corporation
Publication Number: clippings Date: 2011
Author:
Publisher Name:
Location: Timmins RGO
Book - Summary geological report on the Thorne Property, 35p.
Publication Number: 43-101 Date: 2004
Author: G. Cavey
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 RGO
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 RGO
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