|Quadrangle map, 1:250,000-scale||CH|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Arsine prospect is at an elevation of about 5,100 feet near the head of Anderson Creek, a south-flowing tributary of Baby Creek. It is about 0.6 miles west-northwest of the center of section 27, T. 33 N., R. 5 W. The location is accurate within one mile.|
The Arsine prospect is near a thrust fault in lower Paleozoic metamorphic rocks between two masses of the Devonian(?) Baby Creek granitic batholith (Brosgé and Reiser, 1964) The prospect was staked in 1964 by the Oil Development Company of Texas based on soil samples with anomalous copper, arsenic, and antimony (Kurtak and others, 2002). Little is known about the exploration of the property other than that there is an indication that the target was gold and arsenic mineralization (DeYoung, 1978).Kurtak and others (2002) found conspicuous, iron-oxide-stained gneiss with about 2 percent disseminated pyrite, pyrrhotite, and magnetite, that extends for about 2 miles along a contact of the granitic rocks with quartz-mica schist. A sample of siliceous, metamorphosed intrusive rock collected nearby contained 138 ppm copper and 135 ppm molybdenum. Kurtak and others (2002) suggest that the prospect may be a metamorphosed copper-molybdenum porphyry deposit.
|Geologic map unit||(-148.668447390927, 67.6589089379145)|
|Mineral deposit model||Data to sparse to classify.|
|Age of mineralization||Data too sparse to determine.|
|Alteration of deposit||Iron-staining of gneiss from oxidization of disseminated pyrite, pyrrhotite, and magnetite.|
|Workings or exploration||No indication of industry work beyond claim staking in 1964. Sampled by Bureau of Land Management (Kurtak and others, 2002).|
|Indication of production||None|
Additional commentsMAS No. 0020310024
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.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska, 2 vols.: Bureau of Land Management, Alaska Technical Report 50, 845 p.
|Reporters||J.M. Britton (Anchorage, Alaska); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|