MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 092L 251

File Created:	24-Jul-1985	by	BC Geological Survey (BCGS)
Last Edit:	30-May-2022	by	Karl A. Flower (KAF)

SUMMARY

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		NMI	092L4,5 Cu1
Name	BROOKS	Mining Division	Alberni, Nanaimo
		BCGS Map	092L022
Status	Showing	NTS Map	092L04E
Latitude	050º 14' 49''	UTM	09 (NAD 83)
Longitude	127º 43' 21''	Northing	5566868
		Easting	591084
Commodities	Copper, Lead, Zinc	Deposit Types	K01 : Cu skarn
Tectonic Belt	Insular	Terrane	Wrangell

Capsule Geology

The area is underlain by Lower Jurassic Bonanza Group volcanic rocks comprised mainly of andesitic to rhyodacitic flows, tuffs and breccia. Locally, the Bonanza Group rocks are intruded by granodiorite of the Jurassic Island Plutonic Suite.

Skarn-type copper, lead and zinc mineralization occurs along the contacts of granitic to rhyodacite dykes (related to the Island Plutonic Suite) where they intrude the Bonanza volcanics. Mineralization is comprised mainly of disseminated chalcopyrite with minor galena and sphalerite.


Bibliography	EMPR ASS RPT 38879, 39632 EMPR GEM 1972-287 GSC MAP 4-1974 GSC OF 9; 170; 463 GSC P 69-1A; 70-1A; 72-44; *74-8 Carson, D.J.T., (1968): Metallogenic Study of Vancouver Island with emphasis on the Relationship of Plutonic Rocks to Mineral Deposits, Ph.D. Thesis, Carleton University, Ottawa EMPR PFD 673365, 673370, 673371, 521058