|Quadrangle map, 1:250,000-scale||MF|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The occurrence is on the north wall of Crillon Glacier 5.35 miles west- southwest of the summit of Mt. Crillon. It is at an elevation of about 3200 feet at the contact of the Crillon-La Perouse layered complex with schist. The occurrence is accurate to about 0.2 mile. The location is approximately the same as number 80 of MacKevett and others (1971) and number 3 of Cobb (1972). The occurrence is approximately 0.2 mile southwest of MF005, an occurrence of nickel and copper.|
Geologic descriptionMineralized layered gabbro near the western contact of Crillon-La Perouse layered mafic-ultramafic body contains 5-6 percent of disseminated pyrrhotite and chalcopyrite. The sulfide minerals probably are magmatic segregations. The area is near the part of the stock described by Rossman (1963, B 1121-F, p. F42-43).
|Geologic map unit||(-137.310929276595, 58.6366313469279)|
|Mineral deposit model||Copper-nickel? segregation deposit in a layered mafic-ultramafic intrusive.|
|Age of mineralization||Tertiary.|
|Workings or exploration||There are no workings. Direct knowledge of this occurrence is based on sampling of R. H. Goldthwait of the Harvard-Dartmouth Expedition cited by Kennedy and Walton (1946, p. 71), who reported 5 to 6 percent of sulfides, pyrrhotite and chalcopyrite, near the contact of the intrusive. No other party has been able to reach the Goldthwait occurrence.|
|Indication of production||None|
Site has been inaccessible because of rock falls since the early examination by Goldthwait. It is close enough to the nickel-copper deposit at locality MF005 to suggest the possible continuity of mineralization in this part of the layered complex. The site is in Glacier Bay National Park and Preserve.Kennedy and Walton (1946) cite an unpublished report by Goldthwait that may be in Dartmouth or Harvard Expedition files.
Cobb, E.H., 1972, Metallic mineral resources map of the Mount Fairweather quadrangle, AK: U.S. Geological Survey Miscellaneous Field Study Map MF-436, 1 sheet, scale 1:250,000.
Kennedy, G.C., and Walton, M.S., Jr., 1946, Geology and associated mineral deposits of some ultrabasic rock bodies in southeastern Alaska: U.S. Geological Survey Bulletin 947-D, p. 65-84.
Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.
MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.
|Reporters||C.C. Hawley (Hawley Resource Group)|
|Last report date||4/6/1999|