Unnamed (near Greens Creek)

Occurrence, Active

Commodities and mineralogy

Main commodities Fe
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale A-2
Latitude 58.0904
Longitude -134.6528
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of approximately 1,900 feet about 1.2 miles northwest of the Greens Creek Mine (JU253). It is in the NW1/4NE1/4 section 5, T. 44 S., R. 66 E. of the Copper River Meridian. The location is accurate within 1/4 mile.

Geologic setting

Geologic description

Wells and others (1986) describe this occurrence as pyrite in spongy quartz, associated with a northwest-trending fault in sheared and serpentinized ultramafic rock. The occurrence is currently (2001) under control of Kennecott Greens Creek. 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 (-134.654579430522, 58.0900648096306)

Production and reserves

Indication of production None

References

References

Gehrels, 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.
Reporters J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date 12/15/2001