Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41O16SE00010

Record: MDI41O16SE00010

General

Commodities

Primary Commodities: Zinc, Lead, Silver, Iron

Secondary Commodities: Gold, Cadmium

Location

Township or Area: Genoa

Latitude: 47° 50' 6.02"    Longitude: -82° 12' 10.65"

UTM Zone: 17    Easting: 409979.72   Northing: 5298662.61    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41O16SE

Point Location Description: Pit within a 50m long trench on a southern crest of a ridge.

Location Method: Field Visit with GPS

Access Description: Access is difficult and involves a circuitous road trip using the Sultan access road from Highway 144, then driving along the Mallard forest access road to the old trail to Rush Lake. This trail is a 4x4 trail and is 7km to the landing at Rush Lake. From the landing a boat must be taken up the length of Rush Lake to a bay on the northwest shore. Then from this point the showing is a 2km traverse along a well marked trail and down a grid line. Alternatively secondary forestry roads at the southern end of the Kenogaming Main Haul road come within 2km of the eastern end of Falconbridge grid about 2km from the showing.

Exploration History

1908:Smith - discovery of iron formation. 1910-12: Jefferson Mining Corporation - diamond drilling, trenching, prospecting. 1928: Century Zinc - 10 ddh . 1929: Canam Metals - 4 ddh. 1929: Oliver Iron Mining Company - prospecting. 1950: Sudbury Lead-Zinc Mines - 23 ddh. 1957: Stackpool Mining - EM survey, 13 ddh (1063m). 1978: Texasgulf Canada - HLEM and VLF-EM surveys, mag survey. 1978: Noranda Exploration - mapping, mag and HLEM surveys. 1980-83: Falconbridge Exploration - VLF-EM, mag surveys, lithogeochemical surveys, stripping, mapping. 1992: Falconbridge Exploration - mapping, ground geophysics, diamond drilling. 2006: Vencan Gold Corp. – Aerial electromagnetic and magnetic survey, geochemical survey, assays, DD, sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

Tectonic Assemblage: Marion

Geological Age: Neoarchean   Geochronological Age: 2729 +/- 5 MA   Geochron. Age Ref.: OF 3384C

Metamorphism Type: Regional

Metamorphism Grade: Greenschist

Lithology

Lithology Comments

Dec 07, 2005 (S Fumerton) - The mineralization is hosted in the Woman River banded iron formation. Regionally this iron formation is composed of vary proportions of chert, jasper, magnetite, hematite, sulphide, silicate, and carbonate. The sulphide facies are more dominant in the northeast in the vicinity of the showing especially where sulphides occur in the underlying felsic metavolcanic. Locally garnet porphyroblasts occur in the amphibole rich horizons. Underlying the iron formation is a sequence of felsic metavolcanics primarily composed of flow breccias, pyroclastics and minor massive flows. These rocks have been subjected to chlorite and sericite alteration. Immediately underlying the sulphide facies iron formation and about 100m northeast of the showing is a wedge of felsic debris breccias. Overlying the iron formation is an altered tholeiitic sequence of pillowed and massive basaltic flows. Alteration is dominantly carbonate with some sericite/biotite. Feldspar porphyry dykes have been intersected in drill core in the vicinity of the showing. Also thin fine grained felsic veinlets with disseminated pyrite cut the iron formation at shallow angles.

Mineralization

Mineralization Comments

Dec 07, 2005 (S Fumerton) - Mineralization varies between near pure sections of massive galena in the centre of the main trench with higher proportions of sphalerite along the margins and the known lateral limits. Chalcopyrite occurs together with sphalerite and galena in bands within the iron formation along strike 15m east of the main pit. Fine disseminated sphalerite has been observed in the chert horizons within the iron formation. This sphalerite is not associated with other sulphides and locally forms discontinuous trails partially concentrated along one contact. Similarly in the amphibole rich beds fine grained pyrite is concentrated along one contact. Within the feldspar porphyry there are trace amounts of very fine grained galena disseminated in the matrix.

Dec 07, 2005 (A Wilson) - Grab samples of the iron formation returned assays ranging from 35.9 to 41.28% in the magnetite iron formation. Samples from the pyritic section returned values of 20.15 to 29.00% Fe. A high grade sample taken in 1908 assayed 73% Pb and 6% Zn. Grab samples taken by the OGS in 1970 returned vlaues of 2.88% Pb, 6.7% Zn;0.6 g/t Au, 24 g/t Ag, 43.5% Pb, 0.26% Zn; 6.2g/t Ag, 0.37% Pb, 0.68% Zn. Grab samples taken by the OGS in 1992 returned values of 37.72% Pb, 7.16% Zn; 0.36% Pb, 0.06% Zn.

Assay Samples

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Contact

Site Visit Information

Date: Aug 26, 1992

Geologist: S Fumerton

Notes: The showing was visited together with Marc Leroux (MNDM) while visiting the Falconbridge Exploration camp on the Rush river. The showing is located on a grid line L168E at 49+50N on the present Falconbridge grid. This line follows various other cut lines some of which are very old. At the showing there are a series of trenches that follow the stratigraphy, a few trenches across the stratigraphy and some old diamond drill casing. Old AX core is stacked in three piles which are now overgrown with moss. There are no markers on the core and the boxes are falling apart. More recently this core in the upper boxes has been resampled in various ways, 1) composite samples collected in double 20cm wide swaths across the boxes, 2) composite samples collected by selecting alternate pieces of split core.

References

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: 145  Date: 1985

Author: Rose, D.G.

Publisher Name: Geological Survey of Canada

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

File - Resident Geologist files T-2158

Publication Number: Date:

Author:

Publisher Name:

Location: Timmins RGP office

Map - Heenan, Marion and northern part of Genoa townships, Sudbury District

Publication Number: M2067 Scale: 1:31,680    Date: 1997

Author: Goodwin A.M., Donovan J.F.

Publisher Name: Ontario Dept. of Mines

Location:

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

Part - Sahkatawich (Rush) Lake section, Woman River iron range, District of Sudbury

Publication Number: ARV35-02.003 Page: 94-96  Date: 1998

Author: Moore E.S.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of Heenan and Marion townships and the northern part of Genoa Township, District of Sudbury

Publication Number: R038 Page: 51, 54-55  Date: 1997

Author: Goodwin A.M.

Publisher Name: Ontario Dept. of Mines

Location:

Book - A Lead and Zinc Deposit in Keewatin Iron Formation, p. 371-378

Publication Number: CIM No. 167 Page: 371-378  Date: 1926

Author: Moore, E.S.

Publisher Name: CIM

Location: Timmins RGO

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

Publication Number: R157 Page: 160  Date: 1977

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

Publisher Name: Ontario Division of Mines

Location:

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: SR 1928-C Date: 1930

Author: Bannerman, H.M.

Publisher Name: Geological Survey of Canada

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

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

Publication Number: Sum Rep 1929 C Date: 1930

Author: Bannerman, H M

Publisher Name: Geological Survey of Canada

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

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 - Copper, nickel, lead, and zinc deposits in Ontario

Publication Number: MDC001 Page: 48  Date: 1954

Author: Thomson J.E., Carlson H.D., Ferguson S.A., Pye E.G., Savage W.S.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Copper, nickel, lead and zinc deposits in Ontario (revised to February, 1957)

Publication Number: MDC002 Date: 1957

Author: Thomson J.E., Ferguson S.A., Johnston W.G.Q., Pye E.G., Savage W.S., Thomson R.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Copper, nickel, lead and zinc deposits of Ontario

Publication Number: MDC012 Page: 245  Date: 1969

Author: Shklanka R.

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: 246-249  Date: 1995

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

Publisher Name: Ontario Geological Survey

Location:

Folio - Genoa Township - unpublished GDIF

Publication Number: GDIF Date: 1986

Author: Resident Geologist Staff

Publisher Name: Ontario Geological Survey

Location: Timmins RGO

Mono - Report Of The Ontario Iron Ore Committee With Appendix 1923

Publication Number: NSP013 Page: 201-202  Date: 1998

Author:

Publisher Name:

Location:

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