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File Created: 30-Mar-1988 by Gordon S. Archer (GSA)
Last Edit:  09-Jul-2020 by Karl A. Flower (KAF)

Summary Help Help

Name BORNITE Mining Division Skeena
BCGS Map 104B049
Status Prospect NTS Map 104B08W
Latitude 056º 29' 09'' UTM 09 (NAD 83)
Longitude 130º 16' 38'' Northing 6260885
Easting 421347
Commodities Copper, Gold Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

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

The Bornite zone is locallized at the contact between a south- east-trending Jurassic diorite or monzonite body that cuts the ande- site tuff country rock. The stock hosts disseminated pyrrhotite and shows up as a pronounced magnetometer anomaly. Three trenched and two short diamond-drill holes have been completed on the prospect by late 1988.

Despite its name there is very little bornite in the zone; the mineralization is mainly chalcopyrite and tetrahedrite occurring as disseminations and in small veins within the andesite tuff. Bornite occurs as minor, but distinctive grains, and trace amounts of covel- lite have been reported. Assays from this showing range up to 1.86 per cent copper and 2.74 grams per tonne gold.

EMPR FIELDWORK 1987, pp. 199-209
EMPR OF 1988-4
EMPR PF (*Bridge, D.A., Ferguson, L.J., and Brown, M.G., (1981):
1980 Exploration Report on the Sulphurets Property, Unpublished
Report by Esso Minerals Canada Ltd.; Newmont Exploration of Canada
Ltd.; Geology Map 1:31,250 Scale, 1960's)
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
GCNL *#155, 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
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