|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is on the east bank of Billings Creek at the terminus of Billings Glacier in the E1/2 section 29, T. 9 N., R. 5 E., of the Seward Meridian. This is location 134 of Condon and Cass (1958), location 57 of Cobb and Richter (1972), location 89 of MacKevett and Holloway (1977), location 139 of Cobb and Tysdal (1980), and location S-171 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
Geologic descriptionThis deposit consists of quartz veins in or near the sheared contacts between Tertiary dikes and Valdez Group slate of Late Cretaceous age (Cobb and Tysdal, 1980). The dikes have been traced for several thousand feet along strike and are from 1.5 to 5 feet wide (Hoekzema and Sherman, 1983). Some portions of the dikes are highly altered, but the alteration is not described. Fractures in the dikes are recemented by quartz-carbonate veins containing arsenopyrite and small amounts of sphalerite, galena, and gold. The veins vary greatly in thickness, the widest measuring 8 inches (Johnson, 1914 [B 592-G, p. 234]). One quartz vein contained high tungsten values.
|Geologic map unit||(-148.598316870673, 60.8418120292619)|
|Mineral deposit model||Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Tertiary or younger; the veins cut Tertiary dikes.|
|Alteration of deposit||Portions of the dikes are highly altered, but the alteration is not described.|
|Workings or exploration||The prospect was discovered in 1912, and minor surface exploration was done at that time (Johnson, 1914 [B592-G, p. 234]). The U.S. Bureau of Mines examined and sampled the area in 1979, 1980, and 1981 (Hoekzema and Sherman, 1983). One grab sample of quartz contained 700 ppm tungsten. Anomalous gold values were found in Billings Creek.|
|Indication of production||None|
Additional commentsThe U.S. Bureau of Mines rated this prospect as having low mineral development potential (Jansons and others, 1984).
Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Condon, W.H., and Cass, J.T., 1958, Map of a part of the Prince William Sound area, Alaska, showing linear geologic features as shown on aerial photographs: U.S. Geological Survey Miscellaneous Investigations Series Map I-273, 1 sheet, scale 1:125,000.
Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
Johnson, B.L., 1914, The Port Wells gold-lode district, Alaska: U.S. Geological Survey Bulletin 592-G, p. 195-236.
Johnson, B.L., 1918, Mining on Prince William Sound: U.S. Geological Survey Bulletin 662-C, p. 183-192.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||11/15/1999|