|Quadrangle map, 1:250,000-scale||MF|
|Quadrangle map, 1:63,360-scale||D-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The occurrence is near sea level at the west mouth of Rendu Inlet 0.45 miles northeast of VABM Rendu. It is about 1.5 miles north of the point between Rendu Inlet and Glacier Bay. The location is probably accurate within 0.1 mile. The location is number 38 of MacKevett and others (1971), number 33 0f Cobb (1972), and number 43 of Kimball and others (1978).|
Geologic descriptionIron-stained pyritic zones up to 20 feet long and 1 foot thick occur in bleached marble of the Paleozoic marble and hornfels unit of Brew and others (1978). The unit is probably correlative with post-Silurian pre-Triassic limestone of Seitz (1959). The bedded rocks are intruded by granitic rocks of Cretaceous age. A pyritic zone containing minor chalcopyrite and possibly pyrrhotite was sampled by MacKevett and others (1971, table 9). A selected sample from a thin pyrite-rich lens contained 1500 ppm copper, 700 ppm cobalt, and 1000 ppm nickel, suggesting the prescence of nickeliferous pyrrhotite as an additional phase.
|Geologic map unit||(-136.629865501475, 58.9126076403615)|
|Age of mineralization||Cretaceous or younger.|
|Alteration of deposit||Bleaching of marble near sulfidized zones.|
|Workings or exploration||Surface exposures only, 2 samples collected (MacKevett and others, 1971).|
|Indication of production||None|
Additional commentsPaleozoic marble invaded by granitic plutons of Cretaceous age. The area is in Glacier Bay National Park and Preserve.
Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p., 7 sheets.
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.
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||4/9/1999|