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File Created: 19-Sep-1988 by Garry J. Payie (GJP)
Last Edit:  01-Jan-0001 by BC Geological Survey (BCGS)

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Name JOHN BULL 1 Mining Division Skeena
BCGS Map 104B059
Status Showing NTS Map 104B09E
Latitude 056º 31' 33'' UTM 09 (NAD 83)
Longitude 130º 13' 39'' Northing 6265281
Easting 424488
Commodities Lead Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

This occurrence is located just south of Mitchell Glacier in an area underlain by Lower Jurassic Unuk River Formation rock, Hazelton Group. This formation is composed primarily of intermediate to mafic pyroclastics and flows with minor interbeds of siltstone and wacke. The north trending Brucejack Fault System cuts the country rock within a kilometre to the east of the occurrence. A large gossanous pyrite-quartz-sericite alteration zone covers much of the area with the rocks being locally foliated to schistoses in texture (Open File 1988-4).

Numerous small pieces of pyrite-barite float, hosting small amounts of galena, were found near a quartz-barite-pyrite lens that occurs within chlorite schist. This lens is 0.3 metres wide by 6 metres long (Assessment Report 499).

EMPR AR 1935-B7,B12; 1961-9; 1962-8; 1964-19; 1967-31; 1968-45
EMPR ASS RPT 348, *499, 569, 1006, 3170, 5416, 5921, 5958, 6066, 8420, 9568, 14672
EMPR EXPL 1975-E182; 1976-E182; 1977-E223; 1980-464
EMPR FIELDWORK 1987, pp. 199-209
EMPR GEM 1972-515; 1974-334
EMPR OF 1988-4
EMPR PF (Geology Map-1:31250 Scale-Newmont Exploration of Canada, Ltd., 1960's)
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
GCNL #187,#194,#242, 1985
N MINER Sept.23,Oct.14,Dec.16, 1985; Jun.2, 1986; Aug.8, 1988
Kirkham, R.V., (1963): The Geology and Mineral Deposits in the Vicinity of the Mitchell and Sulphurets Glaciers, M.Sc. Thesis, University of British Columbia
Simpson, T.M., (1983): The Geology and Hydrothermal Alteration of the Sulphurets Deposits, Northwest British Columbia, M.Sc. Thesis, University of Idaho