|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of 400 feet on the west side of the terminus of the Billings Glacier. It is located in NE1/4 section 29, T. 9 N., R. 5 E., of the Seward Meridian. This is location S-170 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
Geologic descriptionThis occurrence consists of a 12-foot-wide pegmatite body in Eocene biotite-quartz monzonite (Hoekzema and Sherman, 1981). The pegmatite contains clay-filled vugs lined with euhedral, doubly terminated quartz crystals as much as 18 inches long. The quartz crystals are translucent and commonly coated with muscovite. The clay surrounding the quartz crystals was sampled and analyzed. It contained 1,000 ppm titanium, 10,000 ppm sodium, 20 ppm gallium, and 100 ppm vanadium (Hoekzema and Sherman, 1983).
|Geologic map unit||(-148.603717706304, 60.8461127572854)|
|Mineral deposit model||Pegmatite|
|Age of mineralization||Eocene of younger; the pegmatite cuts Eocene intrusive rock.|
|Workings or exploration||A small, hand-dug prospect pit has been excavated for the purpose of removing quartz crystals. The clay surrounding the quartz crystals was analyzed and contained 1,000 ppm titanium, 10,000 ppm sodium, 20 ppm gallium, and 100 ppm vanadium (Hoekzema and Sherman, 1983).|
|Indication of production||Undetermined|
|Production notes||Some 300 pounds of specimen-grade quartz has been collected (Hoekzema and Sherman, 1983).|
Additional commentsThe U.S. Bureau of Mines determined that this occurrence has a high mineral potential for specimen-grade quartz crystals.
Hoekzema, R.P., and Sherman, G.E., 1981, Billing Glacier molybdenum-copper occurrence, Whittier, Alaska: U.S. Bureau of Mines Open File Report 141-81, 30 p., 2 sheets.
Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||10/15/2000|