Unnamed Occurrence (ARDF - MM136; lower Eldorado Creek), Kantishna Mining District, Denali Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - MM136; lower Eldorado Creek)	- not defined -
Kantishna Mining District	Mining District
Denali Borough	Borough
Alaska	State
USA	Country

The occurrence is in Denali National Park and Preserve. It is probably within the boundary of a former placer claim on Eldorado Creek.
Location: This occurrence is on a trail along lower Eldorado Creek. It is in the SE1/4 SE1/4 section 14, T. 16 S., R. 18 W., Fairbanks Meridian. The location is accurate within 500 feet. The occurrence corresponds to number 69 of Hawley and Associates (1978), 12 of Bundtzen, Smith, and Tosdal (1976), and 15 of Bundtzen (1981). The site is probably the same as an occurrence described by Morrison (1964,sample A16).
Geology: The country rock at this occurrence is quartzite, probably of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981). The occurrence consists of a poorly exposed quartz-siderite vein that strikes strikes about N 25-35 E., and dips 80 SE. The vein contains pyrite, arsenopyrite, and probably galena. Samples assay 0.01 ounce of gold per ton, 0.16 ounce of silver per ton, as much as 0.24 percent lead, and 0.45-0.95 percent arsenic ( Thornsberry, McKee, and Salisbury, 1978, v. 2, site 24; Bundtzen, 1981, table 10, number 15). Morrison (1964) reported pyrite and arsenopyrite in quartz-calcite veins at this or a nearby locality. A sample assayed 0.04 ounce of gold per ton.
Workings: The occurrence is a natural exposure in a road cut. There are no workings.
Age: The deposit is assumed to be Eocene (see record MM091).

Commodities (Major) - Au(?); (Minor) - Ag, As, Pb
Development Status: None
Deposit Model: Low-sulfide Au(?)-quartz vein (Cox and Singer, 1986; model 36a).

Other Databases

Link to USGS - Alaska:	MM136

Other Regions, Features and Areas containing this locality

References