Main commodities | Cu; Zn |
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Ore minerals | chalcopyrite; pyrrhotite; sphalerite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | SR |
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Quadrangle map, 1:63,360-scale | B-2 |
Latitude | 60.2643 |
Longitude | -147.7186 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The prospect is located near tidewater on the north side of Snug Harbor, 1.5 miles northwest of Discovery Point (see the 1:250,000 quadrangle for this feature). It is in the NE1/4 section 16, T. 2 N., R. 10 E., of the Seward Meridian. This is location 241 of Tysdal (1978 [MF-880-A]) and location S-38 of Jansons and others (1984). This location is accurate to 300 feet. |
Geologic descriptionThe prospect consists of a shear zone in slate and graywacke of the Orca Group of early Tertiary age; the shear zone contains lenses of massive sulfide along with quartz veins (Nelson and others, 1985; Kurtak and Jeske, 1986). The shear zone is 3 to 5 feet wide; it trends N20E and dips steeply northwest. The surface exposure is strongly iron-stained. Sulfides consist of pyrrhotite, chalcopyrite, and sphalerite that are, along with quartz, in fractures and brecciated zones (Kurtak and Jeske, 1986). Workings on the prospect consist of a 70-foot-long adit that appears to parallel the trend of the mineralized zone for 55 feet, then crosscuts it. A single sample from the adit contained 110 ppm copper and 53 ppm zinc. An 8-foot chip sample collected from the iron-stained shear zone at the mouth of the adit contained 0.37 percent copper and 0.82 percent zinc (Kurtak and Jeske, 1986). | |
Geologic map unit | (-147.720637765767, 60.2637261916545) |
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Mineral deposit model | Besshi massive sulfide (Cox and Singer, 1986; model 24b) |
Mineral deposit model number | 24b |
Age of mineralization | Tertiary or younger; the occurrence is in rocks of the Orca Group of Tertiary age. |
Alteration of deposit | There is considerable limonite staining in the surface exposure of the shear zone. |
Workings or exploration | Workings on the prospect consist of a 70-foot-long adit that appears to parallel the trend of the mineralized zone for 55 feet, then crosscuts it. A single sample from the adit contained 110 ppm copper and 53 ppm zinc. An 8-foot chip sample from the iron-stained shear zone at the mouth of the adit, contained 0.37 percent copper and 0.82 percent zinc (Kurtak and Jeske, 1986). |
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Indication of production | None |
MRDS Number | A010535 |
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References | |
Reporters | Jeff A. Huber and Carol S. Huber (Anchorage) |
Last report date | 12/18/2001 |