Lin

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale A-3
Latitude 60.0588
Longitude -147.8153
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located in the SE1/4 section 25, T. 1 S., R. 9 E., of the Seward Meridian. It is on Latouche Island about 1 mile southeast of Sleepy Bay. This is location S-13 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence consists of several mineralized shear zones that cut across sedimentary rock near the shore (Kurtak and Jeske, 1986). Sphalerite, minor chalcopyrite, and pyrite are present in small shear zones. The host rock is west-dipping interbedded slate and sandstone of the Orca Group of early Tertiary age (Nelson and others, 1985). A small gabbro mass is exposed on the shoreline, about one mile southeast of Sleepy Bay. The U.S. Bureau of Mines collected three chip samples. One sample collected from a sulfide-rich lens contained 5.9 percent zinc, but the exposure was very small (Kurtak and Jeske, 1986). The other two samples contained insignificant amounts of metals.
Geologic map unit (-147.817291799175, 60.0581650325328)
Mineral deposit model Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Mineral deposit model number 24b
Age of mineralization Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.

Production and reserves

Workings or exploration Kurtak and Jeske (1986) noted that the claims were staked over a geophysical anomaly. The U.S. Bureau of Mines collected three chip samples. One sample collected from a sulfide-rich lens, contained 5.9 percent zinc, but the exposure was very small (Kurtak and Jeske, 1986). The other two samples contained insignificant amounts of metals.
Indication of production None

Additional comments

A. M. Bateman, a consultant for Kennecott Copper Company, may have investigated this property. His report is available on request from the Minerals Division, Bureau of Land Management, Anchorage, Alaska.

References