Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41O16SE00009

Record: MDI41O16SE00009

General

Commodities

Primary Commodities: Molybdenum, Silver, Nickel

Secondary Commodities: Bismuth, Lead

Location

Township or Area: Desrosiers

Latitude: 47° 48' 28.43"    Longitude: -82° 2' 29.14"

UTM Zone: 17    Easting: 422026.65   Northing: 5295474.14    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41O16SE

Point Location Description: Trench described as 'South' pit.

Location Method: Field Visit with GPS

Access Description: The property can be reached via Highway 144, turning west onto the Gogama logging road 1 km north of Gogama. Take the logging road northwest to the 40 km mileage marker, then turn south onto a spur road for 1 km to its end. The eastern shore of Alike Lake is 150 meters east of the road. The round bay on the west side of the lake lies on the southeastern corner of the property and can be reached by a 15 minute boat ride. [AF T-4653 report, 2001]

Exploration History

1928 H.M. Bannerman discovered a molybdenite showing during the course of a regional reconnaissance mapping program for the Geological Survey of Canada. // 1958 Prospector Nick Elieff rediscovered molybdenite west of the narrows on Alike Lake. // 1959-60 Jonsmith Mines carried out a program of stripping, trenching and blasting using heavy equipment. Over 30 sites showing molybdenite were located on the property. This work was followed up with a 19 hole drill program for a total of just over 4500' (1374m). [AF T-2073] // 1999-2000, M. Y. Gagne: Cleaning and resampling of existing pits in vicinity of showing, prospecting on adjoining claims [AF T-4653]. 2006 – Molymade Inc.: EM, Mag (T-5427).

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

Tectonic Assemblage: Halcrow-Swayze

Geological Age: Neoarchean   Geochronological Age: 2700 MA   Geochron. Age Ref.: GOO VOL 1

Geology Comments

Dec 07, 2005 (K Houle) - The attitude of the South Pit is described as having an east/west strike and a steep dip of 80 deg to the north.

Lithology

Lithology Comments

May 30, 2006 (K Houle) - Molybdenite occurrences found in a series of pegmatite dykes that conform with the local country rock and also intrudes granite, diorite and peridotite. Two main zones of molybdenite mineralization occur and these are referred to as the No. 2 showing or 'South Pit' and the No. 1 showing or 'North Pit'. The South Pit has reported dimensions 17'x13'x9' and is sunk completely in pegmatite. A sample of the fines from the 165 tons mined from this pit is reported to have assayed 2.25% MoS2. Molybdenite in this pit occurs as coarse aggregates and seams of molybdenite. The North Pit showing occurs about 200' north of the south pit and is sunk in a flat lying pegmatite dyke of about 6' thickness. Fifty tons of approximately 1% MoS2 was taken from this pit but diamond drilling failed to show any continuity at depth. The best assay results coming out of both the north and south pits occurs in regions of quartz segregated out of the pegmatite.

Mineralization

Mineralization Comments

May 30, 2006 (K Houle) - The Jonsmith report on the property lists three types of molybdenite mineralization that had been found. In order of relative molybdenite abundance these are:- a) Flakes and aggregates of molybdenite within pegmatite dykes and feldspathic quartz veins. b) Molybdenite disseminations in sheared greenstone, diorite and peridotite as well as in fractured rhyolite. c) Segregations of molybdenite within granite and near granite contacts. Molybdenite occurs as flakes and aggregates, the flakes varying in size from a millimetres to an inch and a half in the richer pegmatite sections. Disseminations of molybdenite occur in small flakes throughout shear zones but the only occurrences of ore grade have been found in the pegmatite dykes.

Nov 21, 2012 (D Draper) - Jonsmith drillhole #1, drilled on the North Pit, cut serpentinized peridotite mineralized with py and cpy that returned 0.18% Ni over 0.5 ft and 0.14% Ni over 2.3 ft. An accompanying report referred to an assay value of 0.23% Ni from an unidentified hole. [T-2073] Selected Gagne assay results: Pit #1, 51.2 g/t Ag, 6.42% Mo; Pit #3 (approx 160m NW of #1), 114.4 g/t Ag, 7.09% Mo, 4200 ppm Bi, 2890 ppm Pb; Pit #6 (Jonsmith Contact Zone site), 10.64% Mo (T-4653).

May 30, 2006 (A Wilson) - Assays from grab samples at the site returned values of 4.27% Mo and 0.19% Bi.

Assay Samples

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Vein

Site Visit Information

Date: Jun 17, 1960

Geologist: W Savage

Notes: A third visit was made to the property. As before the writer accompanied E.L. MacVeigh by plane from South Porcupine and Jack Willars was resident engineer at the Jonsmith camp. Seven additional holes had been drilled since break-up and one more hole will be put down to complete the program. With the disappearance of the snow we were able to see that the pegmatite in the 'Contact Zone' occurs as a narrow vein trending northeast on the contact between rhyolite and greenstone. As in the earlier drilling the molybdenite content of the pegmatite zones was very low and no ore intersections were obtained. The molybdenite distribution is so erratic that it was felt that bulk sampling would be the only was to arrive at a reliable estimate of grade. Sinking a small shaft in the near vertical South Pit Zone for this purpose has been proposed. There can be little doubt that the later molybdenite bearing pegmatite dikes came from the same magmatic source as the regional granite. In the area mapped, which is less than one tenth of the property, several plugs of granite occur in which there are weak disseminations of molybdenite adjacent to the contacts. MacVeigh has recommended that surface prospecting be continued with particular attention being given to the possibility of locating a segregation of molybdenite in the granite sufficiently concentrated to be of economic importance. [ PRECIS ]

Date: Aug 02, 1994

Geologist: K Houle

Notes: The showing of what was previously described as the 'South' pit was located. Flakes and aggregates of molybdenite were seen occurring within small 4-10 cm pegmatite veinlets oriented at about 70 degrees AZ, cross cutting fine to medium grained dioritic intrusives. Molybdenite was also noted as occurring with pegmatitic inclusions within the intrusive. Exposures of sheared or well foliated mafic volcanic rocks as well as a lens of peridotite was noted occurring in the southern region of the outcrop exposure. Quartz stockwork veining occurs in some locations and may have been prevalent along contact with volcanics. A rock dump and the edge of the flooded pit shows considerable molybdenite mineralization, flakes and aggregates, associated with milk white quartz veining. Smaller veinlets of quartz with flakes of molybdenite can be seen cutting the felsic intrusive.

References

Map - Geological series, Operation Chapleau, Opeepeesway-Rocky Island lakes sheet, districts of Algoma and Sudbury

Publication Number: P0675 Scale: 1:126,720    Date: 1997

Author: Thurston P.C., Siragusa G.M., Sage R.P.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Publication - Mineral occurrences in Woman River district, Ontario; Geological Survey of Canada, Summary Report 1929, pt. C

Publication Number: Sum Rep 1929 C Page: 27  Date: 1930

Author: Bannerman, H M

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/102021

Map - Geology, Swayze greenstone belt, Rush Lake, Ontario

Publication Number: OF3384c Scale: 1:50,000    Date: 1999

Author: Heather, K B; Shore, G T

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/210451

Publication - Molybdenum Deposits of Canada; Geological Survey of Canada, Economic Geology Report 20

Publication Number: Econ Geol 20 Page: 83  Date: 1963

Author: Vokes, F.M.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/103994

Map - Rush Lake Sheet, Sudbury District, Ontario

Publication Number: Map 290A Scale: 1:63,360    Date: 1933

Author: Bannerman, H M

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/107624

Journal - N MINER JAN 01, 1959

Publication Number: N/A Date: 1996

Author:

Publisher Name:

Location: Article not in Timmins RGO library

MonoMap - Geology of the Chapleau area, districts of Algoma, Sudbury, and Cochrane

Publication Number: R157 Page: 258-9  Date: 1977

Author: Thurston P.C., Siragusa G.M., Sage R.P.

Publisher Name: Ontario Division of Mines

Location:

Publication - Molybdenum in Canada Part 2 : Molyfile - an index level computer file of molybdenum deposits and occurrences in Canada; Geological Survey of Canada, Economic Geology Report 33

Publication Number: Econ Geology 33 Date: 1982

Author: Kirkham, R V; McCann, C; Prasad, N; Soregaroli, A E; Vokes, F M; Wine, G

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/109258

Book - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario

Publication Number: GSC OF 1087 Page: 41O-129  Date: 1985

Author: Rose, D. G.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/129999

Publication - Mineral deposits of the eastern part of Rush River map-area, Woman River district, Ontario; Geological Survey of Canada, Summary Report 1928, pt. C

Publication Number: Sum Rep 1928 C Page: 27  Date: 1930

Author: Bannerman, H M

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/102074

Publication - Rush Lake area, Sudbury District, Ontario; Geological Survey of Canada, Summary Report 1933, pt. D

Publication Number: SR33-D Date: 1934

Author: Bannerman

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/102113

Mono - Pegmatite mineral resources of Ontario

Publication Number: IMR021 Date: 1997

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Molybdenum deposits of Ontario

Publication Number: MDC007 Page: 67  Date: 1968

Author: Johnston F.J.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)

Publication Number: OFR5912 Page: 251-252  Date: 1995

Author: Fumerton S.L., Houle K.A.

Publisher Name: Ontario Geological Survey

Location:

Journal - Jonsmith Continues Drill Molybdenite Property, June 23, 1960

Publication Number: Date: 1960

Author: The Northern Miner

Publisher Name: Northern Miner

Location: Timmins RGO newsclippings

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