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File Created: 29-Feb-1988 by Gordon S. Archer (GSA)
Last Edit:  09-Jul-2020 by Karl A. Flower (KAF)

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NMI 104B8 Cu2
Name KERR C, C Mining Division Skeena
BCGS Map 104B049
Status Prospect NTS Map 104B08W
Latitude 056º 28' 16'' UTM 09 (NAD 83)
Longitude 130º 15' 50'' Northing 6259231
Easting 422138
Commodities Gold, Silver, Copper Deposit Types L02 : Porphyry-related Au
L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Sulphurets-Mitchell Creek area is underlain by rock of the Lower Jurassic Unuk River Formation, Hazelton Group. These include green to grey volcanic epiclastics, and a sequence of dominantly fine- grained marine sediments. A third sequence of massive red and green volcanic sandstones and conglomerates form the highest peaks capping the stratigraphic sections.

The mineral occurrence is reported to lie entirely within a "tectonic shear zone". This zone contains all of the significant gold anomalies. This zone covers an elongated northern trending area 800 to 900 metres wide and 2 kilometres long. The zone is flanked by comparatively unaltered or weakly altered, fine-grained, brownish green clastic sediments and submarine volcanic rocks on the east, and by a thick unit of basaltic andesite on the west. This tectonic zone is typically composed of moderately to strongly altered and sheared rocks interpreted to be of volcanic, subvolcanic or plutonic origin. Most of the altered zone can be described as a sericite schist, how- ever, andesitic tuffs and flows, and feldspar porphyry dykes and possibly flows, can be recognized in the less altered zone. A later formed "swarm" of fine-grained, weakly altered andesite dykes cuts across the schistosity. Both the altered zone and dykes have been cut by faults. Minor sections of silty shale and siltstone occur on the western and eastern margin of the altered zone.

The C zone occurs within a fault-bounded block of ground that also contains the L zone (Lake zone). Host rocks include andesitic tuffs altered to sericite schist. The mineralization is probably continuous between these two zones, but of sub-economic grade. The west bounding fault is the B zone Fault. The eastern bounding fault is the Camp Fault.

The C zone consists of pyrite mineralized quartz veins and silica-cemented breccias. Mineralization consists of gold, with sub- economic amounts of values copper and silver. A weighted average of 9 trench samples (Trench C2) resulted in 3.19 grams per tonne gold and 7.20 grams per tonne silver over an 18 metre length (Assessment Report 16616). Alteration in the C zone is predominantly sericite. Quartz, pyrite, epidote and chlorite alteration are also reported.

EMPR ASS RPT 12471, 13369, 14614, 15493, 16616
EMPR EXPL 1983-522; 1984-386; 1985-A24,A52; 1986-C440; 1987-A15,C376
EMPR FIELDWORK 1987, pp. 199-209
EMPR INF CIRC 1986-1, pp. 14,18; 1988-1, p.12 (BC Mineral Exploration
Review 1985, 1987)
EMPR OF 1988-4
EMPR PF (Newmont Exploration of Canada Ltd.: Geology Map, 1:31,250
Scale; Sulphurets Gold Corporation: Prospectus, Jul.22, 1987,
Statement of Material Facts (#61/88), Jun.30, 1988; Western
Canadian Mining Corporation: Annual Report 1987, Press Release
Sept.28, 1988)
EMR MP CORPFILE (Western Canadian Mining Corporation)
GCNL #70,#194, 1985; #232, 1986; #142,#144,#165,#173,#177,#182,#202,
#204, 1987; #75,#155,#156,#163,#167,#191, 1988
N MINER Nov.9,Dec.14, 1987; Sept.19,Oct.3,10,Nov.28, 1988
V STOCKWATCH Aug.27,Sept.8,11,23,27,Oct.21,23,26,Nov.16, 1987
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
Kirkham, R.V. (1963): M.Sc. Thesis, U.B.C.: The Geology and Mineral
Deposits in the Vicinity of the Mitchell and Sulphurets Glaciers
Simpson, T.M., (1983): The Geology and Hydrothermal Alteration of the
Sulphurets Deposits, Northwest British Columbia, M.Sc. Thesis,
University of Idaho
Lechner, M.J. (2007-04-06): Mitchell Creek Technical Report
Lechner, M.J. (2008-02-29): Kerr-Sulphurets Technical Report
Lechner, M.J. (2008-03-27): Updated Mitchell Creek Technical Report
Grills, F. (2008-12-19): Kerr-Sulphurets-Mitchell Preliminary Economic Assessment 2008
Lechner, M.J. (2009-03-30): Updated KSM Mineral Resources
Grills, F. (2009-09-08): Kerr-Sulphurets-Mitchell (KSM) Preliminary Economic Assessment Addendum 2009
Lechner, M.J. (2010-01-25): January 2010 Updated KSM Mineral Resources
Grills, F. (2010-03-31): Kerr-Sulphurets-Mitchell (KSM) Prefeasibility Study
Lechner, M.J. (2011-03-29): March 2011 Updated KSM Mineral Resources
Ghaffari, H. (2011-06-15): Kerr-Sulphurets-Mitchell (KSM) Prefeasibility Study Update 2011
Huang, J. (2012-06-22): 2012 KSM (Kerr-Sulphurets-Mitchell) Prefeasibility Study
Lechner, M.J. (2014-03-31): NI 43-101 Technical Report on Initial Deep Kerr Resource
Huang, J. (2014-11-11): 2012 KSM (Kerr-Sulphurets-Mitchell) Prefeasibility Study
Ghaffari, H. (2016-10-06): 2016 KSM (Kerr-Sulphurets-Mitchell) Prefeasibility Study Update and Preliminary Economic Assessment