Main commodities | Asbestos |
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Ore minerals | tremolite asbestos |
Quadrangle map, 1:250,000-scale | JU |
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Quadrangle map, 1:63,360-scale | B-3 |
Latitude | 58.2593 |
Longitude | -134.8102 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The Bear Creek prospect is at an elevation of about 200 feet on a north-flowing tributary of Bear Creek. It is 3.5 miles south of Lone Mountain and 2 miles east of the head of Funter Bay. It is near the center of the NE1/4 section 5, T. 42 S., R. 65 E. of the Copper River Meridian. The location is accurate within 1/4 mile. |
Geologic descriptionThis prospect is in amphibole-mica schist, and consists of a vertical layer, 18 inches thick of tremolite asbestos that strikes N 45 W and can be traced on the surface for 60 feet (Race and Rose, 1967; Wells and others, 1986). The deposit contains veins of cross-fiber asbestos 0.75 inch thick and 6 to 8 inches long (Cobb, 1978 [OFR 78-374]). Prior to 1930, the Alaska Asbestos Company, Inc. dug an opencut across the belt of tremolite schist, and constructed a road from the beach to the property (Roehm, 1943). The rocks in the general area are mainly Ordovician and Devonian to Triassic clastic units, mafic-intermediate volcanic rocks, and subordinate limestone. The bedded rocks are intruded and locally metamorphosed by Cretaceous granodiorite (Gehrels and Berg, 1994). | |
Geologic map unit | (-134.811990546486, 58.2589653628682) |
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Workings or exploration | Prior to 1930, the Alaska Asbestos Company, Inc. dug an opencut across the belt of tremolite schist, and constructed a road from the beach to the property (Roehm, 1943). |
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Indication of production | None |
ReferencesGehrels, G.E., and Berg, H.C., 1994, Geology of southeastern Alaska, in Plafker, George, and Berg, H. C., eds., The geology of Alaska: Geological Society of America, DNAG, The geology of North America, Vol. G-1, p. 451-467.
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Reporters | J.C. Barnett and L.D. Miller (Juneau, Alaska ) |
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Last report date | 12/15/2001 |