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  3. Alaska Resource Data File (ARDF)

Unnamed (east of Sunrise Creek)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Hg
Other commodities Fe
Ore minerals cinnabar; hematite

Geographic location

Quadrangle map, 1:250,000-scale MD
Quadrangle map, 1:63,360-scale D-5
Latitude 63.851
Longitude -155.049
Nearby scientific data Find additional scientific data near this location
Location and accuracy Occurrence is situated on a prominent, isolated knob about one half mile (0.8 km) east of Sunrise Creek at an elevation of 1,100 feet (335 m) in Section 12, T. 19 S., R. 19 E., of the Kateel River Meridian.

Geologic setting

Geologic description

Hematite occurs as dark red and black veinlets and as fine botryoidal masses in cavities in brecciated and hydrothermally altered, porphyritic rhyolite, in part of a unit described as rhyolite domes, tuffs and breccia by Patton and others, 1980). Possible dark, oxidized cinnabar also occurs in the veinlets (Patton and Moll, 1983). Three samples contained 0.95 to 3.70 ppm mercury (Patton and Moll, 1983).
Geologic map unit (-155.051374496422, 63.8504041069989)
Alteration of deposit Chalcedonic.

Production and reserves

Workings or exploration Three samples contained 0.95 to 3.70 ppm mercury (Patton and Moll, 1983).
Indication of production None
Reserve estimates None.

References

MRDS Number A012434

References

King, H.D., Risoli, D.A., Cooley, E.F., O'Leary, R.M., Speckman, W.A., Speisman, D.L., and Galland, D.W., 1980, Final results and statistical summary of analyses of geochemical samples from the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811F, 134 pages.
Patton, W.W., Jr., and Moll, E.J., 1983, Mineral resource assessment map of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811-G, 3 sheets, scale 1:250,000.
Patton, W.W. Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811-A, one sheet at 1:250,000 scale.
Reporters Bundtzen, T.K. (Pacific Rim Geological Consulting)
Last report date 6/7/1998