|Quadrangle map, 1:250,000-scale||MK|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 2,200 feet in the southern headwaters of Margot Creek. The occurrence is in the SW1/4 sec. 13, T. 22 S, R. 38 W., of the Seward Meridian. This location is accurate within one-quarter mile.|
Geologic descriptionThis occurrence consists of pyrite- and chalcopyrite-bearing quartz veins at the propylitzed margin of a Tertiary, hypabyssal stock (Riehle and others, 1993). The veins grade inward to poorly developed stockworks having veinlets of chalcopyrite and molybdenite in the potassic altered core of the pluton. The maximum length of the exposed area of the core of the pluton is about 110 yards.
|Geologic map unit||(-155.437169655463, 58.2711972722818)|
|Mineral deposit model||Porphyry copper-molybdenum (Cox and Singer, 1986; model 21a).|
|Mineral deposit model number||21a|
|Age of mineralization||Tertiary or younger; the pyrite- and chalcopyrite-bearing quartz veins cut a Tertiary hypabyssal pluton.|
|Alteration of deposit||Propylitic alteration grading inward to potassic alteration in the core of the stock.|
|Indication of production||None|
Additional commentsThis occurrence is in the Katmai National Monument.
Church, S.E., Riehle, J.R., and Goldfarb, R.J., 1993, Interpretation of exploration geochemical data for the Mount Katmai quadrangle, and adjacent parts of the Afognak and Naknek quadrangles, Alaska: U.S. Geological Survey Bulletin 2020, 67 p., 3 plates, scale 1:250,000.
Church, S.E., Riehle, J.R, Magoon, L.B., and Campbell, D.L., 1992, Mineral and energy resource assessment maps of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 2021-F, 22 p., 2 sheets, scale 1:250,000.
|Reporters||F.H. Wilson, S.E. Church, and D.P. Bickerstaff (U.S. Geological Survey)|
|Last report date||8/31/2005|