MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 104N 070

File Created:	24-Jul-1985	by	BC Geological Survey (BCGS)
Last Edit:	30-Sep-2021	by	George Owsiacki (GO)

SUMMARY

Summary Help


		NMI	104N3 Asb1
Name	CHIKOIDA MOUNTAIN	Mining Division	Atlin
		BCGS Map	104N025
Status	Showing	NTS Map	104N03E
Latitude	059º 13' 59''	UTM	08 (NAD 83)
Longitude	133º 00' 07''	Northing	6567712
		Easting	614005
Commodities	Asbestos	Deposit Types	M06 : Ultramafic-hosted asbestos
Tectonic Belt	Intermontane	Terrane	Cache Creek, Plutonic Rocks

Capsule Geology

The Chikoida Mountain occurrence is located on Chikoida Mountain about 54 kilometres south-southeast from the community of Atlin.

Chikoida Mountain is underlain by upper Mississippian to Permian ultramafic rocks that are emplaced in Cache Creek Complex rocks. The Cache Creek Complex is represented by cherts and argillites of the Mississippian to Triassic Kedahda Formation and altered green basalts of the upper Mississippian to Permian Nakina Formation. The ultramafic rocks are spatially related to Nakina Formation mafic volcanics and may also be genetically related (Monger, Geological Survey of Canada Paper 74-47).

A stock of Middle Jurassic Three Sisters Plutonic Suite has intruded these rocks producing a halo of "dynamothermal metamorphism" within the ultramafics surrounding the intrusion. Some asbestos fibre (chrysotile?) has been reported in serpentine within the metamorphosed halos on Chikoida Mountain.


Bibliography	EMPR AR 1960-131 EMPR OF 1995-25; 1996-11 EMPR PFD 670129, 670131, 670132, 670136, 672462 GSC MAP 1082A; 1418A GSC MEM 307, p. 78 GSC OF 864; 1565 GSC P 74-47 DIAND OF *1990-4 Cordey, F., et al. (1987): Significance of Jurassic Radiolarians from the Cache Creek Terrane, British Columbia, in Geology Vol.15, pp. 1151-1154