|Quadrangle map, 1:250,000-scale||UN|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Located approximately 1.2 km north of Makushin River between the Mak North and Makushin Valley prospects, about 2.5 km inland of Broad Bay and 1.25 km NW of the Makushin Valley prospect.|
Geologic descriptionVery similar to Makushin Valley (UN009) vein; in particular the east-west trending part of the Makushin Valley vein system. Quartz veins occur in propylitically altered porphyritic andesite and andesitic volcaniclastic rocks of the Unalaska Formation (see Drewes and others, 1961). Discontinuously exposed for at least 900 m on strike, having a width of 5 to 7.5 m.
|Geologic map unit||(-166.673789565057, 53.9307348804315)|
|Mineral deposit model||Epithermal gold vein|
|Mineral deposit model number||25|
|Age of mineralization||Late Tertiary or younger|
|Alteration of deposit||Regional propylitic alteration; no apparent wall-rock alteration around vein.|
|Workings or exploration||Twelve channel samples collected along discontinuous outcrop. Six samples yielded gold values between 100 and 650 ppb. The 2 highest samples yielded 1,062 ppb (over 6 m) and 1,748 ppb (over 2 m) gold.|
|Indication of production||None|
Additional commentsSee UN009, UN010
Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.
Randolph, D.B., 1991, Unalaska project, 1990 final report: Battle Mountain Exploration Company, Alaska District, 62 p., 5 appendices, 15 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
|Last report date||12/18/1992|