|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||A-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of 4,000 feet northwest of the west end of Seven Mile Lake, in the SW1/4NW1/4 section 11, T. 20 S., R. 7 E., Fairbanks Meridian. It is Kardex site number KX68-086 (Heiner and Porter, 1972).|
The area near the Richards claims is mostly colluvium overlying Nikolai Greenstone of Late Triassic age (Nokleberg and others, 1991). Bedrock, where exposed, consists of metabasalt, locally altered, cut by quartz-epidote veins. Sample 2811 of limonite-stained altered metabasalt cut by quartz veins was essentially barren (Kurtak and others, 1992, table A23), but the U.S. Bureau of Mines spent little time in the area and noted that more prospecting was needed.The Richards claims were located for copper, iron, gold, and silver (Heiner and Porter, 1972). Primary ore mineralogy is unknown.
|Geologic map unit||(-146.366756863521, 63.1972709775963)|
|Mineral deposit model||Basaltic Cu? (Cox and Singer, 1986; model 23?).|
|Mineral deposit model number||23?|
|Alteration of deposit||Locally 'altered', probably propylitized basalt (Kurtak and others, 1992).|
|Workings or exploration||
The ten Richards claims were staked in 1964-1966 by Northland Mines (Heiner and Porter, 1972; Kurtak and others, 1992). A sample collected from altered metabasalt cut by quartz veinlets was barren (Kurtak and others, 1992).The area is now covered by claims staked by MAN Resources, which mostly are for platinum and associated metals (W.T. Ellis, written communication, 2001).
|Indication of production||None|
Additional commentsKurtak and others (1992) proposed that additional prospecting was needed.
Heiner, L.E., and Porter, Eve, 1972, Alaska Mineral Properties, volume 2: University of Alaska, Mineral Industry Research Laboratory Report 24, 669 p.
Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1991, Mineral investigations in the Valdez Creek Mining District, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 658 p., 2 sheets, scale 1:250,000.
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||8/6/2001|