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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  12-Nov-2014 by Laura deGroot (LDG)

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NMI 092C16 Mn6
Name STANLEY CREEK, CHEM, LOOKOUT, COW 7 Mining Division Victoria
BCGS Map 092C090
Status Showing NTS Map 092C16E
Latitude 048º 51' 28'' UTM 10 (NAD 83)
Longitude 124º 01' 01'' Northing 5412144
Easting 425407
Commodities Gold, Silver, Copper, Manganese, Rhodonite, Gemstones Deposit Types G01 : Algoma-type iron-formation
Q02 : Rhodonite
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Stanley Creek showings are located in the eastern head waters of Stanley Creek, approximately 4 kilometres north east of Lake Cowichan.

The property is underlain by pyroclastic and sedimentary rocks of the Upper Devonian McLaughlin Ridge Formation (Sicker Group) and the Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Lake Group). Lithologies comprise cherty tuff, chert, argillite, iron formation, volcanic and volcaniclastic rocks.

Sulphide mineralization consists of widely disseminated pyrite and chalcopyrite associated with shear zones and stratiform iron-rich deposits consisting of layered pyrite and magnetite.

Rhodonite occurs in thinly laminated chert and cherty tuff of the Fourth Lake Formation in the Lower Mississippian Shaw Creek Member (dated by conodonts, Personal Communication - Nick Massey, 1991) adjacent to a Jurassic granodiorite stock. The showing consists of two irregular lenses of rhodonite, parallel to the bedding, about 5 to 30 centimetres wide and 6 metres long. Microprobe analyses assayed 42.25 per cent MnO (Cowley, 1979). The rhodonite has been known of since about 1939.

In 1986, International Cherokee Development completed a program of geochemical sampling, geological mapping, prospecting, ground geophysical surveys and diamond drilling, totalling 213 metres, on the area as the Cow 7 claim. This work identified limonitic shears, trending east and up to 20 centimetres wide, mineralized with 5 per cent pyrite and 2 to 3 per cent chalcopyrite, three hundred metres to the northeast of the rhodonite occurrance. A sample assayed 1.4 grams per tonne gold, 17.6 grams per tonne silver, and 1.58 per cent copper (Assessment Report 16053).

In 1986, a hematitic chert (iron formation) horizon was also identified and was traced for over 700 metres, possibly extending along strike for several kilometres. The horizon is up to 10 metres wide and hosts pyrite, magnetite and up to 0.3 grams per tonne gold (Assessment Report 16053). Several fault zones cut this unit and, where exposed, are enriched in manganese, barium, zinc and anomalous gold values. These may be the source of the well mineralized float found on the property. The bed, composed of blue-grey cryptocrystalline quartz (sporadically jasperoidal), contains up to 5 per cent pyrite and specular hematite and several per cent magnetite.

In 1989, International Cherokee Development completed a program of geochemical sampling and ground geophysical surveys. In 1992, GLS Global Listing Service Limited completed a program of rock and soil sampling on the area as the Chem property. This work was centered to the north on Waldon Creek. In 1998, the area was prospected as the Lookout and Man claims by R. Walton.

Bibliography
EMPR ASS RPT *15013, *16053, 18871, 22329, 25885
EMPR BULL 37, p. 68
EMPR FIELDWORK 1978, pp. 38-40; 1986, pp. 223-229; 1987, pp. 81-91; 19
pp. 503-510
EMPR MP MAP 1992-2
EMPR OF 1987-2; RGS 24, 1990
EMPR PF (In General File: B.C. Forest Products Road Map, Cowichan
Lake Area, 1963; In Commodity File - Sargent, H. (1956): Manganese
occurrences in B.C. and Leaming, S.F. (1966): Rhodonite in B.C. in
The Canadian Rockhound and Danner, W. R. (1976): Gem Materials of
B.C.; Prospectors Report 1998-1 by Ron Walton)
GSC MAP 1386A
GSC MEM 13
GSC OF 463; 821; 1272
GSC P 72-44; 72-53 p. 34,56; 76-1A; 79-30
PERS COMM (Nick Massey, GSB, 1991)
Carson, D.J.T. (1968): Metallogenic study of Vancouver Island with
emphasis on the relationships of mineral deposits to plutonic
rocks, Ph.D. Thesis, Carleton University
Cowley, P. (1979): Correlation of Rhodonite Deposits on Vancouver
Island and Saltspring Island, British Columbia, Unpublished B.Sc.
Thesis, University of British Columbia
Hudson, R. (1997): A Field Guide to Gold, Gemstone & Mineral Sites of
British Columbia, Vol. 1: Vancouver Island, pp. 96-97
Sargent, H. (1939): Manganese Deposits of Cowichan Lake
EMPR PFD 5718, 889280

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