|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||B-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 4,000 feet in a northeast-flowing part of a west tributary of the West Fork Maclaren River, near the center of section 23, T. 18 S., R. 5 E., Fairbanks Meridian. It corresponds to locality A30 of Kurtak and others (1992).|
Geologic descriptionThe area of the occurrence is underlain by schist and amphibolite probably formed during metamorphism of Cretaceous age (Nokleberg and others, 1982). Zinc contained in a mineral (probably sphalerite or an oxidation product) occurs in a breccia zone 5 to 15 feet wide (Nokleberg and others, 1990). Four samples of breccia contained between 0.12 and 0.18 percent zinc (Kurtak and others, 1992).
|Geologic map unit||(-146.73797201499, 63.3403652508831)|
|Mineral deposit model||Zinc-bearing fault zone.|
|Age of mineralization||Probably Late Cretaceous or younger; mineralized host breccia postdates Cretaceous (?) metamorphism.|
|Alteration of deposit||Possible oxidation of zinc mineral.|
|Workings or exploration||Surface samples of mineralized breccia contain from 0.12 to 0.18 percent zinc (Kurtak and others, 1992).|
|Indication of production||None|
Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1991, Mineral investigations in the Valdez Creek Mining District, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 658 p., 2 sheets, scale 1:250,000.
Nokleberg, W.J., Albert, N.R.D., Bond, G.C., Herzon, P.L., Miyaoka, R.T., Nelson, W.H., Richter, D.H., Smith T.E., Stout, J.H., Yeend, Warren, and Zehner, R.E., 1982, Geologic map of the southern Mount Hayes quadrangle, Alaska: U.S. Geological Survey Open-File Report 82-52, 27 p., 1 sheet,scale 1:250,000.
Nokleberg, W.J., Lange, I.M., Singer, D.A., Curtin, G.C., Tripp, R.B., Campbell, D.L., and Yeend, Warren, 1990, Mineral resource assessment maps of the Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-A, 22 p., 4 sheets, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||7/30/2001|