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Ontario Geological Survey
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MDI000000000704
| Record Name(s) | Black Thor Deposit - 2009, Black Thor Chromite Zone - 2008, Freewest DDH BT-08-01 - 2008, FWR Property - 2003 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 2009-Aug-13 |
| Date Last Modified | 2022-Mar-10 |
| Created By | |
| Revised By |
Primary Commodities: Chromium
Township or Area: BMA 527 861
Latitude: 52° 47' 6.39" Longitude: -86° 12' 39.13"
UTM Zone: 16 Easting: 553221 Northing: 5848658 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 43D16SE
Point Location Description: drill collar for drill hole BT-08-01
Location Method: Data Compilation
2003-09: Freewest Resources Canada Inc. - airborne geophysics, ground geophysics, DD--67-22,845 m, gravity survey 2010: Cliffs Natural Resources Inc. - property acquired; 2011- Cliffs completed 10095 of diamond drilling and 954 m of HQ drilling for metallurgical testing on the Black Thor and Black Label properties. Cliffs also drilled 7800 m on the Big Daddy Property for resource delineation and 1900 m for metallurgical sampling (Personnel Communication, Cliffs Chromite Ontario Inc. Feb 21, 2012). Enginnering and environmental studies were ongoing in both areas throughout the year. 2012- In their base case study, Cliffs announced that the ferrochrome processing facility for the Ring of Fire ore will be located in Sudbury, Ontario (News Release, Cliffs Natural Resources Inc. May 9, 2012). The company also indicated that a road as opposed to a rail line has been chosen as the preferred mode of transportation and that the expected start-up date related to mine operation, has been pushed back to 2016 from 2015. 2013 - Cliffs’ completed 2500 m of geotechnical drilling in early fall (personal communication, July 2013). November 20, 2013 - Cliffs has placed the Black Thor project on care and maintenance citing delays in talks with the Ontario government and First Nations as the reason.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-5137 / 2.29707 | 20000000358 | 20000000358 |
| T-5144 / 2.29709 | 20000000357 | 20000000357 |
| 2.54823 | 20000008086 | 20000008086 |
| 2.29683 | 20000000444 | 20000000444 |
Province: Superior
Subprovince: Sachigo
Terrane: North Caribou
Domain: Oxford-Stull
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Dunite | 1 | Dunite | Host |
|---|---|---|---|---|
| Pyroxenite | 2 | Pyroxenite | Hanging Wall |
Dec 15, 2010 (A Wilson) - Banded and heavily disseminated chromite mineralization contains a greater percentage of altered cumulate crystals and locally, has a brecciated disrupted appearance. The chromite mineralization occurs near the top of the layered intrusion straddled by an underlying dunite/periodotite sequence and an overlying pyroxenite unit. The Black Thor chromite deposit has been traced for over a 2.9 km strike length, remaining open-ended along strike and to depth. It strikes southwest and has an overturned sub-vertical dip towards the northwest, ranging between 70° and 85°.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chromite | Economic | Ore |
Dec 15, 2010 (A Wilson) - Diamond drilling intersected a 100 m wide intersection of chromite mineralization. The mineralization is massive, locally banded, fine- to medium-grained and contains occasional altered cumulate olivine grains. A 100.8 m section of drill core from the Main Zone returned 30.1% Cr2O3 including a 46.3 m section that assayed 46.3% Cr2O3 from DDH BT-08-01. A 43.5 m intersection from the lower zone returned 8.5 % Cr2O3. The mineralized zone typically contains two chromite layers known as the Lower and Upper zones that range in thickness from tens of metres to more than 100 metres. The zones are separated by a horizon of disseminated chromite hosted within peridotite and dunite. For grades of 30.0% Cr2O3 or greater, Cr:Fe average is 1.92; for grades of 35.0% Cr2O3 or greater Cr:Fe average 2.05 and for grades of 40.0% Cr2O3 or greater, Cr:Fe average 2.10.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| Rank | Characteristic |
|---|---|
| 2 | Massive |
| 1 | Stratiform |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular | 2600 | 350 |
Date: Aug 13, 2009
Geologist: A Wilson
Notes: The zone consists of thick zones of northwest-dipping, semi-massive to massive chromite mineralization, attaining true widths of up to 90 m.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Black Thor | 2012 | Inferred Mineral Resource | 26800000 | Cliffs Natural Resources Annual Report, Dec 31, 2013 | based on a 20% cut-off grade | Chromium 29.3 % |
| Black Thor | 2012 | Measured + Indicated Resource | 137700000 | Cliffs Natural Resources Annual Report, Dec 31, 2013 | based on a 20% cut-off grade | Chromium 31.5 Percent |
| Black Thor | 2010 | Inferred Mineral Resource | 69554960 | Freewest Resources press release, January 14, 2010 | based on a 25% cut-off grade | Chromium 30.9 Percent |
Map - Precambrian Geology of the Hudson Bay and James Bay Lowlands Region Interpreted from Aeromagnetic Data-East Sheet
Publication Number: P3598-REV Scale: 1:500,000 Date: 2008
Author: Stott G.M.
Publisher Name: Ontario Geological Survey
Location:
Publication - Press releases Freewest Resources Canada Inc.
Publication Number: Date: 2008
Author:
Publisher Name: Freewest Resources Canada Inc.
Location: Timmins RGO files
Map - Precambrian Geology of the Hudson Bay and James Bay Lowlands Region Interpreted from Aeromagnetic Data-South Sheet
Publication Number: P3599-REV Scale: 1:500,000 Date: 2009
Author: Stott G.M.
Publisher Name: Ontario Geological Survey
Location:
Mono - Mineral Deposits of Northern Ontario, North of Latitude 49� 30'
Publication Number: OFR6242 Date: 2009
Author: Stott G.M., Josey S.D.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Operation Winisk Lake, Winisk Lake, District of Kenora (Patricia Portion)
Publication Number: P0716 Scale: 1:126,720 Date: 1997
Author: Thurston P.C., Sage R.P., Siragusa G.M., Stott G.M.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office