|Quadrangle map, 1:250,000-scale||MK|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the southeast flank of Mount Griggs at the head of Ikagluik Creek. The occurrence is at an elevation of about 1,600 feet in the SW1/4 sec. 22, T. 21 S., R. 35 W., of the Seward Meridian. The location is accurate within one-half mile.|
Geologic descriptionThis occurrence consists of small, galena-bearing quartz veins in a Tertiary hypabyssal stock. Nearby, float consists of large fragments of quartz with sphalerite and galena in vugs. The quartz veins probably also contain pyrite and chalcopyrite. The lack of abrasion on the galena crystals and the size of the fragments of float suggests their source is near the quartz veins (Church, Riehle, and Goldfarb, 1993).
|Geologic map unit||(-154.989137398798, 58.3329062591961)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||Tertiary or younger; the small galena-bearing quartz veins cut a Tertiary hypabyssal pluton.|
|Alteration of deposit||Nearby stocks show pervasive propylitic alteration at their margins.|
|Workings or exploration||Apparently none beyond sampling by government geologists.|
|Indication of production||None|
Additional commentsThis occurrence is in 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.
|Reporters||F.H. Wilson, S.E. Church, and D.P. Bickerstaff (U.S. Geological Survey)|
|Last report date||8/31/2005|