stripes
Occurrence number:
174-00-020
Country:
United States
Region:
Montana
Location:
Longitude: -115.27, Latitude: 48.5
Carbonatite:
No
This small (1.3 km2) multiple intrusion of syenite, monzonite and granite contains aegirine-augite. It is cut by pegmatites, aplitic dykes and quartz veins, and there is some fenitization of the country rocks. Rock analyses are available in Fleshman and Siegmund (1982, Table 6).
Economic:
Some gold and silver has been won from quartz veins and there are areas of U and Th enrichment along contacts with a large roof pendant (Fleshman and Siegmund, 1982).
References:
T. J. Armbrustmacher, personal communication, 1984. FLESHMAN, B.R. and SIEGMUND, B.L. 1982. National uranium resource evaluation: Kalispell Quadrangle, Montana. United States Department of Energy, Unpublished Report, PGJ/F-133(82)
Location: