Main commodities | Ag; Au; Cu |
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Ore minerals | chalcopyrite; pyrite; pyrrhotite |
Quadrangle map, 1:250,000-scale | TK |
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Quadrangle map, 1:63,360-scale | B-3 |
Latitude | 62.08 |
Longitude | -149.2565 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 4,000 feet above a southwest tributary of a creek that is informally called Little Falls Creek (Anderson 1969). The location is about 1/2 mile east of the top of hill 5105, in the SE1/4 sec. 26, T. 28 N., R. 5 E., Seward Meridian. The location is accurate to within 1/4 mile. The occurrence is locality 48 of Csejtey and Miller (1978). |
Geologic descriptionThis occurrence consists of iron-stained Jurassic (?) quartz-diorite gneiss with inclusions of biotite schist; the rocks contain moderate to abundant amounts of pyrite and pyrrhotite, and traces of chalcopyrite (Rose, 1967). A chip sample of a stained outcrop contains 0.06 percent copper and traces of gold and silver (Anderson, 1969). | |
Geologic map unit | (-149.258713189236, 62.0794879546939) |
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Mineral deposit model | Porphyry Cu-Au? (Cox and Singer, 1986; model 20c?) |
Mineral deposit model number | 20c? |
Alteration of deposit | The gneissic quartz diorite is iron-stained. |
Workings or exploration | Only limited rock sampling (Anderson, 1969). |
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Indication of production | None |
MRDS Number | A012165 |
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References | |
Reporters | R.K. Rogers (U. S. Geological Survey contractor) |
Last report date | 10/1/2002 |