Ontario Geological Survey
Permanent Link to this Record:
MDI42C12NW00002
| Record Name(s) | David Bell Mine - 1987, Hemlo - 2002, Corona - 1987, Lake Superior Deposit - 1987, Molson Lake - 1987 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1987-Aug-27 |
| Date Last Modified | 2022-Sep-16 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Antimony, Barite, Mercury, Molybdenum, Silver
Township or Area: Bomby
Latitude: 48° 41' 32.82" Longitude: -85° 53' 33.79"
UTM Zone: 16 Easting: 581486.12 Northing: 5393859.3 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C12NW
Point Location Description: Large operating mine
Location Method: Data Compilation
Access Description: Approx. 35 km east of Marathon and 50 km south of Manitouwadge, Ontario. Highway 17 bisects the area in an east-west direction and provides the best access to the area. The main CP line also traverses the area and roughly parallels the highway within about 1km to the south.
1949-50: Surface work and approx. 6000 feet of drilling by Lake Superior Mining Corp. Ltd. 1951: At least six diamond drill holes totalling 2733 feet. Work by Teck Exploration Co. Ltd. 1959: Additional diamond drilling completed by unrecorded operator, although possibly done by Lake Superior Mining Corp. Ltd. 1973: Ardel Exploration drilled 3 holes totalling 790 feet 1980: Electromagnetic Survey and Magnetometer Survey conducted by Corona Resources. 1981: Corona Resources drilled 100 diamond drill holes totaling 39,912 feet. 1985: Mine owned 50-50 by Teck Corp. and International Corona. Production began. 1992: In August, International Corona merged with Homestake Mining Company. In December, a subsidiary, Homestake Canada Inc. was established to run the Williams and David Bell Mines. 1999: production from Williams Mine and neighbouring David Bell mine processed together at the Williams mill. 2001: Homestake Mining Company merged with Barrick Gold Corp. 2009: Barrick purchased Teck’s 50% interest in the mine. Barrick now owns 100% of the Hemlo operations. 2010: Mine ceased operations. Production for 2009 and 2010 are reported in MDI42C12NW00005.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.4447 | 42C12NW0029 | 42C12NW0029 |
| 15 | 42C12NW0163 | 42C12NW0163 |
| 63.3958 | 42C12NW0144 | 42C12NW0144 |
| 42C12NW0013B1 | 42C12NW0167 | 42C12NW0167 |
| 42C12NW0014A1 | 42C12NW0162 | 42C12NW0162 |
| 63.4477 | 42C12NW8664 | 42C12NW8664 |
| 63.3078 | 42C12NW0166 | 42C12NW0166 |
| 10 | 42C12NW0145 | 42C12NW0145 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Neoarchean Geochronological Age: 2800 - 2600MA
Metamorphism Type: Shear
Metamorphism Grade: Amphibolite
| Rock Type | Rank | Composition | Texture | Relationship | Terrigenous-Clastic-Unsubdivided | 1 |
|---|---|---|---|---|
| Schist-Unsubdivided | 2 | Host | ||
| Gabbroid-Unsubdivided | 3 | Sills And Dykes |
Nov 27, 2020 (Q Unknown) - The main ore zone occurs within the Moose Lake Formation, a narrow band situated between the hanging wall Cedar Creek Formation and the footwall Rule Lake formation. Similarities between the Cedar Creek and Rule Lake formations have been noted by mine staff, and have been supported by petrographic analysis. The Cedar Creek Formation is composed of finely laminated quartzo-feldspathic wackes with sub-units being distinguished by variations in mineralogy of the more minor constituents. The most common units observed underground are the metasiltstone, the Calc-silicate Rhythmite, and the Meta-Arkose. The Moose Lake formation has a widely varying composition and is divided into 3 unit groups, the Moose Lake Porphyry, the Mafic Fragmental, and the Mineralized Zone. The Rule Lake formation is very similar to the Cedar Creek formation both macroscopically and microscopically. A series of feldspar porphyritic and mafic sills and dikes run subparallel to the ore horizon. They are most commonly found in the footwall side of the A zone ore lens, but can be found through out the Rule Lake, Cedar Creek and Moose Lake formations. Mafic sills and dikes are fine grained, massive to moderatly schistose with sharp unchilled contacts. They are composed of 35-40% biotite, 35-40% hornblende, 10% plagioclase, 0-10% microcline, and 0-10% quartz. Infrequent amphibolite dikes are coarse grained, massive dark green amphibolite and chlorite rich. Diabase dikes are a late feature that cross cut the lithology at a high angle.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Barite | Economic | Ore | ||||
| 2 | Cinnabar | Economic | Ore | ||||
| 3 | Gold | Economic | Ore | ||||
| 4 | Molybdenite | Economic | Ore | ||||
| 5 | Orpiment | Economic | Ore | ||||
| 7 | Pyrrhotite | Economic | Ore | ||||
| 8 | Realgar | Economic | Ore | ||||
| 9 | Stibnite | Economic | Ore | ||||
| Microcline | Alteration | Feldspathization | 1 | Unknown | Disseminated | ||
| Sericite | Alteration | Sericitization | 2 | Unknown | Replacement | ||
| Biotite | Alteration | Biotitic | 3 | Unknown | Disseminated | ||
| Silicate | Alteration | Silicification | 4 | Unknown | Disseminated | ||
| Carbonate | Alteration | Carbonatization | 5 | Unknown | Disseminated | ||
| Tourmaline | Alteration | Tourmalinization | 6 | Unknown | Disseminated | ||
| Pyrite | Alteration | Pyritic | 7 | Unknown | Disseminated | ||
| Albite | Alteration | Feldspathization | 8 | Unknown | Disseminated |
Nov 27, 2020 (Q Unknown) - The David Bell Mine A Zone is the eastern extension of the B zone of the Williams Property and the Main Ore Zone of the Golden Giant Mine, and contributes about 90% of the ore for the David Bell Mine. It is slightly discordant, down dip, as an altered fragmental or conglomeratic rock. This conglomerate unit, which lies at the upper contact of the QFPC, is also known as the biotite rich rock or biotitic fragmental unit of the Williams property; biotitic fragmental subunit of Golden Giant Mine; and clastic bearing feldspar-quartz-porphyritic biotite schist or mylonitized conglomerate of the Teck Corona Property. The David Bell Mine B Zone contains no gold. The David Bell Mine C Zone contains about 500 000 t of ore. The zone occurs onto the Golden Goliath Mines property as the Lower Mineralized Zone. The mineralized zone is discordant in that, at its western end, it is in contact with the lower contact of the main quartz-plagioclase-phyric unit, east of Moose Lake, and at its eastern end, it is within the Muscovite-biotite schist. One diamond drill hole intersected 4.5m grading 30 g/t Au. The D Zone lies on the eastern half of the Teck Corona Property at depth, structurally above the A Zone. The D zone is hosted by 3 different rock units as mapped in the mine. These units are biotitic and chloritic schist, quartzo-feldspathic rock, and conglomerate. The maximum mineralized thickness is 2 m grading from 5 to 17 g/t Au. The E Zone, which is up to 4 m thick, also occurs at depth on the eastern part of the Teck-Corona property, and is structurally below the A Zone. It is enclosed within the biotite-predominant conglomerate, but hosted by what may be altered, layered metasedimentary rocks. The West Zone is of sub ore grade.
Dec 07, 2005 (Q Unknown) - One of the greatest difficulties is distinguishing between 1) unaltered and altered rocks; 2) alteration directly associated with the Hemlo gold deposit and alteration from other events (eg. intrusions, metamorphism); and 3) relative ages of types of alteration.
| Rank | Classification |
|---|---|
| 1 | Metamorphic |
| Rank | Characteristic |
|---|---|
| 2 | Fault |
| 1 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Hemlo | 2009 | Proven + Probable Reserve | 17500000 | Canadian Mines Handbook 2010-11, p. 93 | Gold 0.076 Ounce per Ton | |
| Hemlo | 2009 | Measured + Indicated Resource | 2545000 | Canadian Mines Handbook 2010-11, p. 93 | 179,000 oz Au | Gold 0.070 Ounce per Ton |
| Hemlo | 2009 | Inferred Mineral Resource | 1036000 | Canadian Mines Handbook 2010-11, p. 93 | 155,000 oz Au | Gold 0.150 Ounce per Ton |
| Hemlo | 2008 | Probable Mineral Reserve | 7075000 | Canadian Mines Handbook 2009-10, p. 87 | Gold 0.08 Ounce per Ton | |
| Hemlo | 2007 | Proven + Probable Reserve | 7419000 | Canadian Mines Handbook 2008-09, p. 86 | Gold 0.085 Ounce per Ton | |
| Hemlo | 2006 | Proven + Probable Reserve | 9046000 | Canadian Mines Handbook 2007-08, p. 87 | Gold 0.079 Ounce per Ton | |
| Hemlo | 2006 | Unclassified | 713236 | Scott et al, 2007, ROA 2006, OFR 6202, p1, referenced from J. Mustafa, Teck-Corona Operating Corp. personal communication, 2007. | Reserves at end of 2006; 713,236 t @ 11.55g/t Au | Gold 11.52 Grams per Tonne |
| Hemlo | 2005 | Proven + Probable Reserve | 10382000 | Canadian Mines Handbook 2006-07, p. 68 | Gold 0.091 Ounce per Ton | |
| Hemlo | 2004 | Proven + Probable Reserve | 13946000 | Canadian Mines Handbook 2005-06, p. 65 | Gold 0.090 Ounce per Ton | |
| Hemlo | 2003 | Proven + Probable Reserve | 17557000 | Canadian Mines Handbook 2004-05, p. 68 | Gold 0.099 Ounce per Ton | |
| Hemlo | 2002 | Proven + Probable Reserve | 19726000 | Canadian Mines Handbook 2003-04, p. 69 | Gold 0.107 Ounce per Ton | |
| Hemlo (Williams & David Bell Mines) | 2001 | Proven + Probable Reserve | 21788000 | Canadian Mines Handbook 2002-03, p. 55 | Gold 0.141 Ounce per Ton | |
| David Bell | 2000 | Probable Mineral Reserve | 4289000 | Canadian Mines Handbook 2001-02 p. 185-186 | 1,271,000 oz Au | Gold 0.302 Ounce per Ton |
| David Bell | 1999 | Probable | 4657000 | Canadian Mines Handbook 2000-01 p. 200 | 1,472,000 oz Au | Gold 0.316 Ounce per Ton |
| David Bell | 1998 | Probable | 4448000 | Canadian Mines Handbook 1999-2000 p. 212 | Gold 0.313 Ounce per Ton | |
| David Bell | 1997 | Probable | 4786000 | Canadian Mines Handbook 1998-99 p. 229 | Gold 0.316 Ounce per Ton | |
| David Bell | 1996 | Probable | 5574000 | Canadian Mines Handbook 1997-98 p. 229 | Gold 0.291 Ounce per Ton | |
| David Bell | 1995 | Probable | 5424000 | Canadian Mines Handbook 1996-97 p. 214 | Gold 0.309 Ounce per Ton | |
| David Bell | 1994 | Probable | 546400 | Canadian Mines Handbook 1995-96 p. 194 | Gold 0.317 Ounce per Ton | |
| David Bell | 1993 | Probable | 6400000 | Canadian Mines Handbook 1994-95 p. 194 | Gold 0.317 Ounce per Ton | |
| David Bell | 1992 | Probable | 7000000 | Canadian Mines Handbook 1993-94 p. 182 | Gold 0.321 Ounce per Ton | |
| David Bell | 1991 | Probable | 7543000 | Canadian Mines Handbook 1992-93 p. 197 | Gold 0.328 Ounce per Ton | |
| David Bell | 1990 | Probable | 7537000 | Canadian Mines Handbook 1991-92 p. 212 | Gold 0.363 Ounce per Ton | |
| David Bell | 1989 | Proven + Probable Reserve | 7842300 | Canadian Mines Handbook 1990-91 p. 136 | Proved & Probable | Gold 0.387 Ounce per Ton |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 2008 | 243330 |
Gold 85000 Ounces |
OFR6234 p. 1 | 85,000 oz Au recovered from 268,226 t at a grade of 10.38 g/t Au |
| 2007 | 261178 |
Gold 92685 Ounces |
OFR6218 p. 1 | 92,685 oz Au recovered from 287,900 t at a grade of 10.01 g/t Au |
| 2006 | 304203 |
Gold 95670 Ounces |
OFR6202 p. 1 | 95,670 oz Au recovered from 335,327 t at a grade of 9.42 g/t Au |
| 2005 | 329775 |
Gold 105143 Ounces |
OFR6182 p. 1 | 105,143 oz Au recovered from 363,515 t at a grade of 9.6 g/t Au |
| 2004 | 343524 |
Gold 112279 Ounces |
OFR6148 p. 1 | 112,279 oz Au recovered from 378,670 t at a grade of 9.81 g/t Au |
| 2003 | 344043 |
Gold 123757 Ounces |
OFR6129 | 123,757 oz Au recovered from 379,243 t at a grade of 10.15 g/t Au |
| 2002 | 389816 |
Gold 140593 Ounces |
OFR6112 p. 1 | 140,593 oz Au recovered from 429,699 t at a grade of 10.17 g/t Au |
| 2001 | 412773 |
Gold 151976 Ounces |
OFR6081 p. 2 | 151,976 oz Au recovered from 455,004 t milled at a mill feed grade of 11.15 g/t gold |
| 2000 | 406865 |
Gold 182549 Ounces |
OFR6049 p. 3 | 182,549 oz Au recovered from 448,492 t milled at a mill feed grade of 12.66 g/t Au |
| 1999 | 402760 |
Gold 159372 Ounces |
OFR6005 p. 2 | 159,372 oz Au recovered from 443,967 t milled at a feed grade of 0.381 oz/t Au |
| 1998 | 385717 |
Gold 159152 Ounces |
OFR5989 p. 2 | 159,152 oz Au recovered from 425,180 t milled at a feed grade of 0.391 oz/t Au |
| 1997 | 389526 |
Gold 179963 Ounces |
OFR5971 | 179,963 oz Au recovered from 429,379 t milled at a feed grade of 0.438 oz/t Au |
| 1996 | 351271 |
Gold 195473 Ounces |
OFR5958 p. 4-2 | 195,473 oz Au recovered from 387,210 t milled at a feed grade of 0.525 oz/t Au |
| 1995 | 400530 |
Gold 158767 Ounces |
OFR5943 p. 79 | 158,767 oz Au recovered from 441,509 t milled at a feed grade of 0.382 oz/t Au |
| 1994 | 512123 |
Gold 192217 Ounces |
OFR5921 p. 71-72 | 192,217 oz Au recovered from 464,590 t milled at a feed grade of 0.44 oz/t Au |
| 1993 | 448742 |
Gold 215188 Ounces |
OFR5892 p. 81 | Feed grade of 0.459 oz/t Au from 491,654 t for 215,188 oz Au recovered |
| 1992 | 424963 |
Gold 210121 Ounces |
MP161 p. 126 | Feed grade of 0.47 oz/t Au from 468,441 t for 210,121 oz Au recovered |
| 1991 | 426555 |
Gold 295284 Ounces |
MP158 p. 125 | 295,284 oz Au recovered from 470,197 t at a feed grade of 0.628 oz/t Au |
| 1990 | 513939 |
Gold 318098 Ounces |
Canadian Mines Handbook 1991-92, p. 212 | average grade 0.637 oz/t Au |
| 1989 | 468648 |
Gold 312190 Ounces |
Canadian Mines Handbook 1990-91, p. 136 | average grade 0.689 oz/t Au |
| 1988 | 432691 |
Gold 218333 Ounces |
Canadian Mines Handbook 1989-90, p. 130 | average grade 0.520 oz/t Au |
| 1987 | 398654 |
Gold 150086 Ounces |
Canadian Mines Handbook 1989-90, p. 130 | average grade 0.389 oz/t Au |
| 1986 | 202942 |
Gold 52888 Ounces |
Canadian Mines Handbook 1987-88, p. 199 | average grade 0.271 oz/t Au |
| 1985 | 97800 |
Gold 20989 Ounces |
Canadian Mines Handbook 1987-88, p. 199 | Average grade 0.224 oz/t Au |
Book - Canadian Mining Journal Sept 1985
Publication Number: CMJ 1985 Page: T1-16 Date: 1996
Author:
Publisher Name:
Location:
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Page: 286 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
MonoMap - Geology of the Hemlo area, District of Thunder Bay
Publication Number: R217 Page: 52, 55-57 Date: 1982
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Compend - Report of activities, 1983, Regional and Resident Geologists
Publication Number: MP117 Page: 72-75 Date: 1984
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Precambrian Geology, Hemlo Gold Deposit Area
Publication Number: R289 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Hemlo Gold Deposit Area
Publication Number: OFR5877 Date: 1993
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Book - Geology and Gold Deposits of the Hemlo Area
Publication Number: Date: 1991
Author: Muir, T.L., Schnieders, B.R., Smyk, M.C.
Publisher Name: GAC-MAC-SEG Field Trip Guidebook
Location:
File - Mineral Deposit Files Thunder Bay
Publication Number: Date:
Author:
Publisher Name:
Location:
Map - Hemlo, Thunder Bay District
Publication Number: M2452 Scale: 1:31,680 Date: 1981
Author: Muir T.L., Lafleur J.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological Compilation of the Eastern Half of the Schreiber-Hemlo Greenstone Belt
Publication Number: M2614 Scale: 1:50,000 Date: 2000
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Structural geology of the Hemlo gold deposit area [south-central sheet]
Publication Number: OFM0182C Scale: 1:5,000 Date: 1991
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Lithology of the Hemlo gold deposit area [south-central sheet]
Publication Number: OFM0181C Scale: 1:5,000 Date: 1991
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Lithology, Hemlo Gold Deposit Area, South-Central Part
Publication Number: P3239 Scale: 1:5,000 Date: 1993
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Structural Geology, Hemlo Gold Deposit Area, South-Central Part
Publication Number: P3243 Scale: 1:5,000 Date: 1993
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Hemlo Gold Deposit Area, Structural Geology, South-Central Part
Publication Number: M2608 Scale: 1:5,000 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Hemlo Gold Deposit Area, Lithology, South-Central Part
Publication Number: M2604 Scale: 1:5,000 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Generalized Lithotectonic Units, Hemlo Gold Deposit Area
Publication Number: M2629-REV Scale: 1:20,000 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Hemlo area (northern half), District of Thunder Bay
Publication Number: P2304 Scale: 1:15,840 Date: 1979
Author: Muir T.L., Lafleur J.
Publisher Name: Ontario Geological Survey
Location:
Map - Structural Geology, Hemlo Gold Deposit Area, North-Central Part
Publication Number: P3242 Scale: 1:5,000 Date: 1993
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Lithology, Hemlo Gold Deposit Area, North-Central Part
Publication Number: P3238 Scale: 1:5,000 Date: 1993
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Hemlo Gold Deposit Area, Lithology, North-Central Part
Publication Number: M2603 Scale: 1:5,000 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Hemlo Gold Deposit Area, Structural Geology, North-Central Part
Publication Number: M2607 Scale: 1:5,000 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
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