British Columbia Ministry of Energy, Mines and Natural Gas and Responsible for Housing
News | The Premier Online | Ministries & Organizations | Job Opportunities | Main Index

MINFILE Home page  ARIS Home page  MINFILE Search page  Property File Search
Help Help
File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  09-Jul-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI 104B9 Mo1
Name MOLY (SULPHURETS), DAWSON (SULPHURETS), SULPHURETS, SNOWFIELD, ARBEE, MITCHELL EAST, EAST MITCHELL Mining Division Skeena
BCGS Map 104B059
Status Showing NTS Map 104B09E
Latitude 056º 31' 30'' UTM 09 (NAD 83)
Longitude 130º 14' 17'' Northing 6265200
Easting 423837
Commodities Molybdenum, Gold, Copper Deposit Types L05 : Porphyry Mo (Low F- type)
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Moly zone is underlain by interbedded volcanics and lesser sedimentary rock of the Lower Jurassic Unuk River Formation, Hazelton Group. A stock of Jurassic monzonite to quartz monzonite intrudes the country rock within 0.5 kilometres to the southwest of the prospect.

Pervasive silica-pyrite-sericite-chlorite-feldspar alteration has obliterated primary texture and structures. Extensive shearing and faulting and related alteration has resulted in discrete foliation. Altered rocks within the zone are now essentially quartz- sericitic-schists. The rocks typically contain between 3 to 5 per cent pyrite and as much as 10 per cent locally.

Light grey quartz veins containing up to 5 per cent pyrite, generally intrude parallel to subparallel foliation and are less than 1.5 centimetres thick. Molybdenite mineralization occurs primarily within very thin quartz stringers, associated with the grey quartz veins, and as localized less significant remobilized fractions along shear planes. Finely disseminated molybdenite is also common within highly silicified granitic rocks. Minor chalcopyrite with malachite occurs locally within volcanic rocks.

Two holes were drilled in 1980 by Esso Minerals Canada Ltd., with overall results considered negative. Diamond-drill hole 13 contained a 3 metre section of 0.037 per cent molybdenite and diamond-drill hole 9 contained 3 metres of 0.92 grams per tonne gold. Most assays were significantly less. Silver is also anomalous (Assessment Report 8420).

In 1993. the Moly zone is mentioned and plotted by Newhawk Gold Mines Ltd but no information is offered (Assessment Report 23172).

In 2007, a drill hole on the Mitchell East (Moly) zone yielded 0.713 gram per tonne gold and 0.14 per cent copper over 258.77 metres, including 1.377 grams per tonne gold and 0.31 per cent copper over 31.14 metres (Blanchflower, J.D. (2008-04-21): Technical Report on the Snowfield Property). The Mitchell East zone has been identified as the northern extension of the Snowfield (MINFILE 104B 179) zone.

Another zone of mineralization, referred to as the Arbee zone, is located approximately 450 metres to the south west. The zone comprises a network of quartz stockwork veinlets of variable intensity cuts both intrusive and hornfels and host disseminated, fine-grained pyrite and pyrite veinlets with minor disseminated chalcopyrite. Occasional veinlets of magnetite are also reported.

Six samples from the Arbee zone averaged 0.220 per cent copper and 0.159 gram per tonne gold, while a sample of porphyry yielded 0.250 per cent copper and 0.095 gram per tonne gold (Lechner, M.J. (2007-04-06): Mitchell Creek Technical Report).

Refer to West (104B 193) and Snowfield (104B 179) for details of related mineralization and work history. The Moly zone appears be within the outline of the greater Snowfield zone as defined by owner Pretium Resources (Figure 10.1, Technical Report on Snowfield for Pretium Resources Inc, March 4, 2011)

Bibliography
EMPR AR 1935-B7-B12; 1961-9; 1962-8; 1964-19; 1967-31; 1968-45
EMPR BULL 63
EMPR EXPL 1975-E182; 1976-E182; 1977-E223; 1980-464
EMPR FIELDWORK 1987, p. 199
EMPR GEM 1972-515; 1974-334
EMPR OF 1988-4
EMPR PF (*Bridge, D.A., Ferguson, L.J. and Brown, M.G., (1981): 1980
Exploration Report on the Sulphurets Property by Esso Minerals
Canada Ltd. (unpublished); Bridge, D., Melnyk, W.A., (1983): 1982
Canada Ltd. (unpublished); Britten, R.M., (1983): 1982 Explora-
tion Report on the Sulphurets Property by Esso Minerals Canada
Ltd. (unpublished); Geology Map-1:31,250 Scale-Newmont Exploration
of Canada Ltd., 1960's)
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
Kirkham, R.V., (1963): *M.Sc. Thesis, University of British
Columbia: 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
*Blanchflower, J.D. (2008-04-21): Technical Report on the Snowfield Property
Grills, F. (2008-12-19): Kerr-Sulphurets-Mitchell Preliminary Economic Assessment 2008
Armstrong, T.A. (2009-02-13): Technical Report and Resource Estimate on the Snowfield Property
Lechner, M.J. (2009-03-30): Updated KSM Mineral Resources
Grills, F. (2009-09-08): Kerr-Sulphurets-Mitchell (KSM) Preliminary Economic Assessment Addendum 2009
Armstrong, T.A. (2010-01-14): Technical Report and Updated Resource Estimate on the Snowfield Property
Lechner, M.J. (2010-01-25): January 2010 Updated KSM Mineral Resources
Grills, F. (2010-03-31): Kerr-Sulphurets-Mitchell (KSM) Prefeasibility Study
Narciso, N. (2010-06-01): Technical Report and Preliminary Assessment on the Snowfield Property
Ghaffari, H. (2010-09-10): Technical Report and Preliminary Assessment of the Snowfield-Brucejack Project
Ghaffari, H. (2010-10-28): Technical Report and Preliminary Assessment of the Snowfield-Brucejack Project
Armstrong, T.A. (2011-03-04): Technical Report and Updated Resource Estimate on the Snowfield Property
Lechner, M.J. (2011-03-29): March 2011 Updated KSM Mineral Resources
Armstrong, T.A. (2011-04-04): Technical Report and Updated Resource Estimate on the Snowfield-Brucejack Property
Ghaffari, H. (2011-06-15): Kerr-Sulphurets-Mitchell (KSM) Prefeasibility Study Update 2011
Ghaffari, H. (2012-02-20): Technical Report and Updated Preliminary Economic Assessment of the Brucejack Project
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

COPYRIGHT | DISCLAIMER | PRIVACY | ACCESSIBILITY