Ontario Geological Survey
Permanent Link to this Record:
MDI000000000956
| Record Name(s) | Black Creek Chrome Deposit - 2009, McFaulds West Joint Venture Property - 2008, McFaulds West Block C - 2008 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 2010-Nov-26 |
| Date Last Modified | 2022-Mar-10 |
| Created By | |
| Revised By |
Primary Commodities: Chromium
Township or Area: BMA 527 861
Latitude: 52° 46' 9.53" Longitude: -86° 13' 42.75"
UTM Zone: 16 Easting: 552048 Northing: 5846888 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 43D16SE
Point Location Description: approximate
Location Method: Data Compilation
2007-08: Noront Resources Ltd. - airborne geophysics. 2009: Black Creek deposit was discovered. 2008-2012: Probe Mines Limited - airborne geophysics, DD-45-9850 m, geochemical survey
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.37704 | 20000002819 | 20000002819 |
| 2.41048 | 20000004068 | 20000004068 |
| 2.45910 | 20000004842 | 20000004842 |
| 2.47696 | 20000006216 | 20000006216 |
| 2.29707 | 20000000358 | 20000000358 |
Province: Superior
Subprovince: Sachigo
Terrane: North Caribou
Domain: Oxford-Stull
Geological Age: Archean
Jan 21, 2015 (Therese Pettigrew) - Very little is known about the geology of the McFaulds Lake area, with most of the information obtained from recent drilling in the area of the VMS discoveries at the eastern extent of the volcanics. Within the eastern section of the belt, in the area of the property, a thin (<40 m) section of Paleozoic sedimentary rocks, comprised predominantly of limestone, overlies the volcanic package. The volcanic sequence at this location is comprised of highly altered mafic and felsic volcanic rocks, which have in some cases undergone extensive Mg-metasomatism to form talc-magnetite alteration. In most cases, this replacement alteration has occurr3d to such a degree as to make primary lithologies indiscernible, with all units resembling basaltic flows. The hydrothermal character of the talc-magnetite rock has been established to a fair degree of confidence through whole rock geochemical comparisons utilizing major and trace element characteristics, while precursor lithologies have been demonstrated to be a bimodal population of basaltic and rhyolitic-dacitic volcanic rocks. The character of the felsic sequence suggests that there was significant heat available to the system, which indicates a greater potential for the formation of VMS mineralization in the volcanic strata. The property geology is dominated by the McFaulds Lake mafic-ultramafic sill (also called the Ring of Fire Intrusion), which has been intermittently emplaced along a granodiorite-greenstone contact over a distance of approx. 20 km and hosts a number of recognized chromite bodies. Between the Blackbird deposit in the SW and the Black Thor/Black Label deposit in the NE, approx. 15 km of the sill are known to be mineralized (Probe Mines 2010 43-101).
| Rock Type | Rank | Composition | Texture | Relationship | Peridotite | 1 | Peridotite | Host |
|---|---|---|---|---|
| Granodiorite | 2 | Gneissic | Adjacent | |
| Schist-Unsubdivided | 3 | Hanging Wall |
Dec 02, 2010 (A Wilson) - The McFauld's Lake sill has been interpreted as a well fractionated body comprising a lower sequence of primitive olivine-rich units overlain by an upper sequence of evolved olivine-poor units. The Black Creek Deposit lies at the top of the olivine-rich units. Diamond drill holes intersected a sequence of talc-chlorite and serpentine-altered peridotite and talc-chlorite schist above the disseminated and massive chromite horizons.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chromite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Gangue | ||||
| 3 | Pyrrhotite | Economic | Gangue |
Dec 02, 2010 (A Wilson) - Minor amounts of disseminated pyrite and pyrrhotite are found in the overlying peridotite and dunite. The chromite occurs as both disseminated and massive chromite horizons. The chromite layer is approximately 39 m thick. Disseminated zones of mainly >15% chromite grade into layers of massive chromite. A 40.1 m section of drill core from MJV09-03 intersected 37.4% Cr2O3 including a 25.0 m section that ran 41.0% Cr2O3. A 62.4 m section of drill core from MJV09-06 intersected 34.5% Cr2O3 including a 34.0 m section that ran 41.4% Cr2O3 , and an 8.4 m section that ran 43.4% Cr2O3 , The broad zone of mineralization is approximately 65 m wide. Within the zone there are four main types of mineralization. The massive chromite layer is in contact with pyroxenite and averages 15 m in thickness. The banded chromite zones are micro layers of massive chromite varying in thickness from 5 mm to a maximum of 15 cm. They are inter-layered with peridotite. Semi-massive chromite zones occur randomly beneath the massive zones. They are characterized by a mixture of chromite and occasional olivine crystals in a fine-grained peridotitic matrix. The peridotite host rock contains disseminated chromite in varying concentrations. The heavily disseminated zones are usually adjacent to the semi-massive zones, while the sparse disseminated zones form the background mineralization.
| Rank | Classification |
|---|---|
| 2 | Mafic-Ultramafic Intrusion |
| 1 | Magmatic |
| 1 | VMS Base Metal |
| Rank | Characteristic |
|---|---|
| 1 | Stratiform |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 315 | 35 | 320 |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Black Creek | 2012 | Inferred Mineral Resource | 1610000 | 2015 NI 43-101 | Chromium 37.78 Percent | |
| Black Creek | 2012 | Measured + Indicated Resource | 8645000 | 2015 NI 43-101 | Chromium 37.41 Percent | |
| Black Creek Deposit | 2010 | Inferred Mineral Resource | 2726000 | Probe Mines Limited technical report p. 4, 2010/10/05 | reserves are estimated only | Chromium 40.99 Percent |
| Black Creek Deposit | 2010 | Measured + Indicated Resource | 5714000 | Probe Mines Limited technical report p. 4, 2010/10/05 | reserves are estimated only | Chromium 40 Percent |
Publication - Technical report on the initial mienral resource estimate for the Black Creek Chrome Deposit, 129 p.
Publication Number: 2010 NI 43-101 Date: 2010
Author: J. Spooner, I.A. J. San Martin, C. Z. Murahwi
Publisher Name:
Location: Timmins RGO
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:
Publication - Updated Technical Report on the Mineral Resource Estimate for the Black Creek Chrome Depsoit
Publication Number: 2015 NI 43-101 Date: 2015
Author: Murahwi, C.Z., Spooner, J.
Publisher Name: Micon for Probe Metals
Location: SEDAR
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 - 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:
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