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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  30-May-2013 by Karl A. Flower (KAF)

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NMI
Name LADY D, JRM 7 Mining Division Victoria
BCGS Map 092B091
Status Showing NTS Map 092B13W
Latitude 048º 54' 42'' UTM 10 (NAD 83)
Longitude 123º 47' 59'' Northing 5417944
Easting 441403
Commodities Iron, Magnetite, Gold, Silver, Copper Deposit Types G01 : Algoma-type iron-formation
Q05 : Jasper
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Lady D occurrence is located on the eastern slope of Mount Brenton, approximately 3 kilometres north east of Holyoak Lake.

The area is underlain by volcanics of the Devonian Nitinat Formation, Sicker Group. An exhalative iron formation is associated with a jasper unit. The unit is mapped at the contact of cherty tuffs above, and intermediate volcanics below. It appears to pinch and swell, with observed thicknesses up to 10 metres.

Work done on the showing in 1953 by Ladysmith Development Ltd. indicated that the iron zone extended along strike for 540 metres (Buckham, 1953, Map A).

Through 1984 to 1986, BHP-Utah Mines completed programs of geochemical sampling, airborne and ground geophysical surveys, geological mapping and 16 diamond drill holes, totalling 6317 metres.

In 1986, massive magnetite up to 8 metres thick was intersected in a drill hole by Utah Mines Limited. Up to 2.5 per cent pyrite was present along fractures. An old adit and dump in the same area showed samples of massive magnetite breccia containing up to 20 per cent pyrite with traces of chalcopyrite. Assay values were up to 0.05 per cent copper and 0.74 grams per tonne gold (Assessment Report 15749, page 14). Another nearby drill hole intersected similar mineralization. Moderate quartz veining with pyrite is present in the footwall andesite.

Zones of crackle brecciation occurring in the andesite contain magnetite, pyrite, chalcopyrite and malachite. One of these masses (probably to the northwest of the iron zone?) assayed 8.6 per cent copper, 42.86 grams per tonne silver and 3.22 grams per tonne gold (Assessment Report 15749, page 11).

Bibliography
EMPR ASS RPT 12048, 12315, 12788, 14008, 14669, 15442, *15749
EMPR FIELDWORK 1987, pp. 81-91
EMPR OF 1988-8; 1988-28
EMPR PF (*Report on Exploration for Iron Ore, Ladysmith Devolopment
Ltd., A.F. Buckham, December 1953 (in Lady A file - 092B 029))
GSC MAP 42A; 1386A; 1553A
GSC MEM 13; 36; 96, p. 391
GSC OF 463
GSC P 72-44; 75-1A, p. 23; 79-30
PERS COMM Massey, N.W.D., 1991
Hudson, R. (1997): A Field Guide to Gold, Gemstone & Mineral Sites of
British Columbia, Vol. 1: Vancouver Island, p. 111
EMPR PFD 903322

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