|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at an elevation of 500 feet on the west side Esther Island, about 1,500 feet from the beach. It is in the W1/2 section 36, T. 9 N., R 7 E., of the Seward Meridian. This is location 167 of Tysdal (1978 [MF-880-A] and location S-126 of Jansons and others (1984). This location is accurate to within half a mile. Cobb and Tysdal (1980) summarized the relevant references under the name Kavanaugh and Boon.|
The prospect is in sheared sandstone beds of the Valdez Group of Late Cretaceous age near the contact with the Esther granite of Tertiary age (Cobb and Tysdal, 1980). The deposit consists of stringers and masses of sugary quartz along a 5- to 6-foot-wide shear zone that strikes N40E and dips 85NW.Workings on the prospect consist of an 8-foot-long adit. A poorly defined zone of bluish quartz along the west wall of the adit contained considerable free gold, along with chlorite, chalcopyrite, pyrite, galena, and pyrrhotite (Roehm, 1938 [PE 95-14]). Three channel samples collected in 1937 contained 0.11, 0.08, and 0.75 ounce of gold per ton, along with traces of silver (Roehm, 1938 [PE 95-14]).
|Geologic map unit||(-148.138158110251, 60.8256023973398)|
|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 are within a shear zone that cuts Tertiary granite.|
|Workings or exploration||Workings on the prospect consist of an 8-foot-long adit with a small dump. A little ore was reported to have been shipped between 1911 and 1913 (Johnson, 1914 [B 592-G, p. 234]). Three channel samples collected in 1937 contained 0.11, 0.08, and 0.75 ounce of gold per ton, along with traces of silver (Roehm, 1938 [PE 95-14).|
|Indication of production||None|
|Production notes||A little ore was reported to have been shipped between 1911 and 1913 (Johnson, 1914 [B 592-G, p. 234]).|
Cobb, E.H., and Richter, D.H., 1972, Metallic mineral resources map of the Seward quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-466, 2 sheets, scale 1:250,000.
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.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Roehm, J.C., 1938, Preliminary report of Esther Group, Esther Island, Port Wells District, Alaska: Alaska Territorial Department of Mines Property Examination 95-14, 2 p., 1 sheet, scale 1:120.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||1/3/2000|