Main commodities | Au; Cu; Pb; Zn |
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Ore minerals | chalcopyrite; galena; pyrite; pyrrhotite |
Gangue minerals | calcite; quartz |
Quadrangle map, 1:250,000-scale | CV |
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Quadrangle map, 1:63,360-scale | D-7 |
Latitude | 60.81 |
Longitude | -146.54 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The Banzer prospect is at an elevation of less than 100 feet, about 0.75 mile northeast of Graveyard Point at the mouth of Landlocked Bay. It is in the NW1/4 sec. 19, T. 12 S., R. 7 W., of the Copper River Meridian. The location of the site is accurate to within 2000 ft. This site is loc. C- 67 in Jansons and others (1964) and loc. 17 in Cobb (1972: MF-392). |
Geologic descriptionThe Banzer prospect consists of sulfide-bearing quartz-calcite veins and of irregular clumps and stringers of sulfides in mafic volcanic rocks of the Tertiary Orca Group (Nelson and others, 1985; Cobb, 1979: OF 79-973). Sulfides reportedly include chalcopyrite, galena, pyrite, and pyrrhotite. Capps and Johnson (1915) reported that there were two shafts and more than 200 feet of stripping completed by 1912. Assays of ore yielded values of 2.42 oz. Au/ton. The prospect could not be located in the early 1980s but assays of two grab samples of float from the general area of the prospect contained 0.08 ppm to 0.22 ppm Au, 0.1 ppm to 6.9 ppm Ag, and 22 ppm to 0.24% Cu (Jansons and others, 1984). | |
Geologic map unit | (-146.541996030256, 60.8094502570806) |
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Mineral deposit model | Cyprus massive sulfide (Cox and Singer, 1986; model 24a) |
Mineral deposit model number | 24a |
Age of mineralization | Probably Tertiary based on the age of the host rock. |
Workings or exploration | Capps and Johnson (1915) reported that there were two shafts and more than 200 feet of stripping completed by 1912. Assays of ore yielded values of 2.42 oz. Au/ton. The prospect could not be located in the early 1980s but assays of two grab samples of float from the general area of the prospect contained 0.08 ppm to 0.22 ppm Au, 0.1 ppm to 6.9 ppm Ag, and 22 ppm to 0.24% Cu (Jansons and others, 1984). |
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Indication of production | None |
Additional commentsCrowe and others (1992; 1993) and Sainsbury (1993) discuss the genesis of the volcanogenic massive sulfide deposits in this area. Chugach Alaska Corporation, Anchorage, Alaska has control of these lands. |
MRDS Number | A010430 |
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ReferencesSainsbury, C.L., 1993, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska, A discussion: Economic Geology, v. 88, p. 1284-1285.
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Reporters | S.W. Nelson, Anchorage, AK |
Last report date | 6/10/2000 |