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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  27-Jan-89 by David G. Bailey(DGB)

Summary Help Help

NMI
Name BENTINCK ARM Mining Division Skeena
BCGS Map 093D017
Status Showing NTS Map 093D02E
Latitude 52º 08' 52" N UTM 09 (NAD 83)
Longitude 126º 47' 20" W Northing 5779780
Easting 651284
Commodities Graphite Deposit Types
Tectonic Belt Coast Crystalline Terrane Undivided Metamorphic Assembl.
Capsule Geology

The region is underlain by the Coast Plutonic Complex, consisting of pre- to post-kinematic quartz diorite to granodiorite batholiths intruded into Paleozoic to Mesozoic metasedimentary and metavolcanic rocks. Younger supracrustal assemblages overlying deformed rocks include the (?)Cretaceous Gambier Group and Tertiary Bella Bella Formation volcanic rocks.

The Bentinck Arm graphite showing, located approximately 24.1 kilometres south of Bella Coola, occurs as small thin graphite flakes widely dispersed in a quartz rich gneiss. Geological Survey of Canada mapping, however, has shown that this area is underlain by metavolcanic rocks which have been intruded by a now foliated granodiorite. No further geological information is available.

Bibliography
EM FIELDWORK 2002, pp. 65-75
EMPR PF (McCammon, J.W., letter of May 7, 1976; Buchanan, R.M.,  Head of Ore Mineralogy Section, Canmet, letter of May 18, 1976)
GSC MAP 1327A; 1424A
GSC MEM 327

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