Main commodities | Cu |
---|---|
Other commodities | Ag; Au |
Ore minerals | chalcopyrite; pyrite |
Quadrangle map, 1:250,000-scale | MH |
---|---|
Quadrangle map, 1:63,360-scale | A-2 |
Latitude | 63.1704 |
Longitude | -144.8632 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is near the mouth of Slate Creek, near the center of the W1/2NW1/4 section 22, T. 20 S., R. 15 E., Fairbanks Meridian. The occurrence corresponds to locality 24 of Rose (1967), locality 17 on figure 6 of Cobb (1979 [OFR 79-238]), locality 48 of MacKevett and Holloway (1977), and locality 136 in table 2 of Nokleberg and others (1991). The location is accurate within 0.1 mile. |
Geologic descriptionRocks in the vicinity of the occurrence consist mainly of andesite and dacite of Pennsylvanian age northwest of a dike-like body of quartz monzonite of Mesozoic age (Rose, 1967). The volcanic rocks are highly pyritized and contain weakly disseminated chalcopyrite (MacKevett and Holloway, 1977). A sample of pyritized volcanic rocks contained a trace of gold, 0.12 ounce of silver per ton, and 0.15 percent copper (Rose, 1967). | |
Geologic map unit | (-144.865427040287, 63.1700026623526) |
---|---|
Mineral deposit model | Porphyry Cu (Cox and Singer, 1986; model 20c). |
Mineral deposit model number | 20c |
Age of mineralization | The mineralization is either syngenetic and related to the Pennsylvanian volcanic rocks or epigenetic, related to the Mesozoic quartz monzonite body. |
Alteration of deposit | Pyritization of volcanic rocks. |
Indication of production | None |
---|
References | |
Reporters | W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS) |
---|---|
Last report date | 7/9/2003 |