Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000002423

Record: MDI000000002423

General

Commodities

Primary Commodities: Platinum, Palladium

Location

Township or Area: Porter

Latitude: 46° 24' 11.98"    Longitude: -81° 45' 9.75"

UTM Zone: 17    Easting: 442141   Northing: 5139137    UTM Datum: NAD83

Resident Geologist District: Sudbury

NTS Grid: 41I05NW

Point Location Description: Location of drill hole B-URS-02 (41I05NE2004)

Location Method: Based on Assessment

Access Description: The property is approximately 90km west of the city of Sudbury. The property is accessible by paved road to the past producing Agnew Lake Mine site, followed by gravel logging roads for approximately 10km.

Exploration History

1992: M. Turcott carried out prospecting, sampling, geological mapping, trenching, stripping, assaying and analyses. 1993: Cameco Corp. carried out a ground geophysical survey (magnetometer, VLFEM). 1995: Cameco Corp. carried out diamond drilling, geochemistry, geological mapping, assaying and analyses. 1999: D. Brunne completed overburden stripping, sampling, assaying and analyses. 2000: Ursa Major Minerals Inc. carried out bedrock trenching, mapping, sampling, assaying and analyses. 2001-2002: Ursa Major Minerals Inc. completed 2 diamond drill holes, assaying and analyses, line-cutting, soil sampling. 2004: Ursa Major Minerals Inc. carried out an airborne geophysical survey (magnetometer, electromagnetic). 2010-2011: Ursa Major Minerals Inc. carried out 3 diamond drill holes totaling 2278m, assaying and analyses. 2011: Ursa Major Minerals Inc./Xstrata Canada Corp. completed downhole geophysics on 7 drill holes. 2015-2016: Ursa Major Minerals Inc. completed an airborne geophysical survey (electromagnetic, gravity, magnetometer).

Assessment Work on File

Geology

Province: Southern

Subprovince: Cobalt Basin

Supergroup: Huronian Supergroup

Formation Group: Hough Lake Group

Geological Age: Paleoproterozoic  

Lithology

Lithology Comments

Jun 30, 2020 (Sheree Hinz) - The property is underlain predominantly by a medium-grained quartz gabbro intrusion and the Huronian-aged Mississagi quartzite that strikes east-northeast and dip steeply to the north at approximately 80 degrees. This intrusion has been interpreted by the Ontario Geological Survey (Card, 1976) as Nipissing Diabase however Thompson (1986) and Vogel (1996) think the gabbro body may be related to the layered mafic intrusive series of the Agnew Lake Intrusion. The intrusion is predominantly quartz gabbro along the northern contact, with a gabbro central portion and meta-pyroxenite along the southern contact. The gabbroic rocks are dark grey, fine to medium grained and vary from massive to strongly sheared. The gabbro rocks are composed of plagioclase, hornblende, quartz, biotite, ilmenite and apatite. Minor secondary minerals include actinolite, clinozoisite, epidote, chlorite, sericite, leucoxene and carbonate. A zone of disseminated sulphide mineralization occurs 30 m south of the northern contact between the gabbro and the quartzite and parallels the contact. The zone is exposed at surface in outcrop as a surface gossan.

Mineralization

Mineralization Comments

Jun 30, 2020 (Sheree Hinz) - Work done in 2001 by Ursa Major Minerals Inc. included grab sample 37083, taken approximately 30m west of DDH B-URS-02 reported 1846 ppb Pt+Pd. This sample was found to consist of some large bleb like concentrations of fine to medium grained pyrrhotite and chalcopyrite mineralization occurring within a gabbroic rock. Sample 368062 returned 1411 ppb Pt+Pd over 0.57 m from DDH URS-01 (41I05NE2004). Work done in 2019 by Magna Mining Corp. reported sample 355585 0.23% Ni, 0.45% Cu, 9.6 gpt Pd, 0.25 gpt Rh; sample 355586 0.18% Ni, 0.62% Cu, 7.7 gpt Pd, 0.17 gpt Rh (Magna Mining Corp. corporate presentation 2020).

Mineral Record Details

References

Map - Porter Township, District of Sudbury, Ontario

Publication Number: M2011 Scale: 1:12,000    Date: 1997

Author: Ginn R.M.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Sudbury data series, Porter Township, Sudbury District

Publication Number: P2554 Scale: 1:15,840    Date: 1982

Author: Adlington R.

Publisher Name: Ontario Geological Survey

Location:

Map - Precambrian Geology, Porter and Vernon Townships

Publication Number: P2845 Scale: 1:20,000    Date: 2006

Author: Easton R.M.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological Compilation, East Bull Lake and Agnew Intrusions

Publication Number: P3596 Scale: 1:50,000    Date: 2011

Author: Easton R.M., Josey S.D., Murphy E.I., James R.S.

Publisher Name: Ontario Geological Survey

Location:

Data - Geochemical Data from the East Bull Lake and Agnew Intrusions, and the Whiskey Lake and Ompa Lake Greenstone Belts, Districts of Algoma and Sudbury

Publication Number: MRD223 Date: 2007

Author: Easton R.M., Sykora L.A.

Publisher Name: Ontario Geological Survey

Location:

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