| Quadrangle map, 1:250,000-scale | AN |
|---|---|
| Quadrangle map, 1:63,360-scale | A-4 |
| Latitude | 61.1 |
| Longitude | -148.15 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | Mine located on the east shore of Barry Arm, near BM Acute (south of Barry Glacier). Accurate within 1 mile. Locality 55 of Cobb (1972), locality 44 of MacKevett and Holloway (1977), and locality A-27 of Jansons and others (1984). |
Geologic descriptionA zone of brecciated slate is present along a thrust fault that strikes N 68 E, and dips 45-65 N, in Cretaceous slate (Grant and Higgins, 1910). The 6 to 8 ft zone of brecciated slate is cemented by quartz and contains a layer, 1 to 8 inches thick of finely columnar and granular masses of stibnite with associated acicular stibnite crystals and quartz (Brooks, 1916). Stibnite accounts for as much as 1/3 of the mass locally. Ferruginous carbonate is intimately associated with the stibnite. Grant and Higgins (1910) report specimens indicate that the quartz vein was shattered and subsequently intruded by stibnite-bearing solutions. Bedrock is Late Cretaceous Valdez Group metasedimentary rocks. | |
| Geologic map unit | (-148.152077969245, 61.0994403469122) |
|---|---|
| Mineral deposit model | Simple Sb deposits (Cox and Singer, 1986; model 27d) |
| Mineral deposit model number | 27d |
| Age of mineralization | Late Cretaceous or younger; vein cuts Late Cretaceous Valdez Group metasedimentary rocks. |
| Workings or exploration | Development restricted to surface stripping and trenching. |
|---|---|
| Indication of production | Yes; small |
| Production notes | Approximately 1,000 lbs of stibnite ore taken out before 1910 (Grant and Higgins, 1910). |
Additional commentsPossibility of a gold-bearing quartz vein about five miles from mouth of Barry Arm and one mile inland reported by Johnson (1918). | |
| MRDS Number | A011659 |
|---|---|
| Reporters | D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS) |
| Last report date | 7/30/1998 |