|Quadrangle map, 1:250,000-scale||CH|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This site is at an elevation of about 4,800 feet, approximately 3 1/2 miles northwest of the junction of Thru Creek and the North Fork Chandalar River (SW1/4 sec. 5, T. 35 N., R. 5 W., of the Fairbanks Meridian); the location is accurate within a 1/2-mile radius.|
Geologic descriptionThe limited information about this prospect describes it as malachite and chalcopyrite in quartz veinlets in the Silurian and Devonian Skajit Limestone near its contact with the Upper Devonian Hunt Fork Shale (Grybeck, 1977; Brosgé and Reiser, 1964). The prospect is close to the Bob (CH089) and Gayle (CH091) prospects, which Newberry and others (1997) classified as calcic Zn-Pb skarns and replacement bodies. The location, mineralogy, and geologic setting of the Bibban prospect suggest that it may be related to these Zn-Pb skarns or to Cu-Ag skarns that are also in the area.
|Geologic map unit||(-148.732770041308, 67.8796137333648)|
|Mineral deposit model||Zn-Pb skarn deposits? (Cox and Singer, 1986; model 18c?).|
|Mineral deposit model number||18c?|
|Age of mineralization||Devonian(?) based on reported Early Devonian Pb/Pb zircon ages from the associated Baby Creek batholith and Horace Mountain plutons (Dillon and others, 1996).|
|Workings or exploration||Claims were staked in 1972 and 1976.|
|Indication of production||None|
Additional commentsAlaska Kardex No. 031-61B (Kardex is a card file mining claim information system located at the State of Alaska DNR Public Information Center in Fairbanks).
DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.
Grybeck, Donald, 1977, Known mineral deposits of the Brooks Range, Alaska: U.S. Geological Survey Open-File Report 77-166C, 45 p., 1 sheet, scale 1:1,000,000.
Schmidt, J.M., 1997, Shale-hosted Zn-Pb-Ag and barite deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral deposits of Alaska, 1997: Economic Geology Monograph 9, p. 35-65.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||11/17/1999|