Unnamed (east of upper Midas Creek) (ARDF #WI052) Zn

Unnamed (east of upper Midas Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities	Zn
Other commodities	As; B; Bi; Sn; W

Geographic location

Quadrangle map, 1:250,000-scale	WI
Quadrangle map, 1:63,360-scale	B-5
Latitude	67.2597
Longitude	-152.2327
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This occurrence is located about 6 miles south of the junction of Midas and Sixtymile Creeks. It is at an elevation of about 3,400 feet, 0.1 mile southeast of the top of hill 3567, in section 8, T. 28 N., R. 21 W., of the Fairbanks Meridian. The occurrence is the site of sample 82 in Dillon and others (1981 [AOF 133B]). The location is accurate.

Geologic setting

Geologic description This occurrence consists of skarn mineralization in calcareous schist near an intrusive (Dillon and others, 1981 [AOF 133B]). A chip sample of the mineralized rock contains 3000 ppm zinc, more than 50 ppm tungsten, 700 ppm tungsten, 7 ppm tin, 500 ppm arsenic, 50 ppm bismuth, 700 ppm boron, and 20% iron. The rocks in the vicinity are Devonian chloritic and carbonate rocks and Devonian, Ambler metavolcanics and metabasite (Dillon and others, 1986).
Geologic map unit	(-152.235441146519, 67.2592330778321)
Mineral deposit model	Sn skarn deposit? (Cox and Singer, 1986; model 14b?).
Mineral deposit model number	14b?

Production and reserves

Workings or exploration	Only surface sampling.
Indication of production	None

References

MRDS Number	A011971
References Dillon, J.T., Cathrall, J.B., and Moorman, M.A., 1981, Geochemical reconnaissance of the southwest Wiseman quadrangle-summary of data on rock samples: Alaska Division of Geological and Geophysical Surveys Open-File Report 133B, 164 p.
Reporters	J.M. Britton (Anchorage)
Last report date	8/9/2002