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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 ELCHO HARBOUR, ALKOW HARBOUR Mining Division Skeena
BCGS Map 093D033
Status Showing NTS Map 093D06W, 093D07E
Latitude 52º 23' 59" N UTM 09 (NAD 83)
Longitude 127º 30' 06" W Northing 5806554
Easting 601940
Commodities Graphite Deposit Types P04 : Crystalline flake graphite
Tectonic Belt Coast Crystalline Terrane Undivided Metamorphic Assembl.
Capsule Geology

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

The Elcho Harbour graphite showing is underlain by gneiss of presumed Paleozoic age in which a zone of metasedimentary (amphibolite facies) rocks occurs. These gneisses and schists occur within a large foliated quartz diorite batholith. The occurrence, reported to be a large deposit of disseminated graphite consisting of minute, lustrous, dark steel grey scales and scaly layers, may occur within the metasedimentary rocks. The location given is not precise and no other geological information is available for the occurrence.

Bibliography
EM FIELDWORK 2002, pp. 65-75
EMPR AR 1886-502; 1956-A65
GSC AR 1896, v. IX, p. 16R
GSC MEM 74, p. 109; 372, p. 106
GSC MAP 1327A; 1424A

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