|Quadrangle map, 1:250,000-scale||CH|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Pilgrim prospect is about 5.8 miles at an azimuth of 20 degrees from the central (5425) peak of Horace Mountain and about 0.4 mile south-southwest of peak 5150. It about 0.5 mile south-southwest of the center of section 24, T. 34 N, R, 7 W. Kurtak and others (2002) include a map showing the regional geology of the area and the location of this and the other deposits of the Chandalar Copper Belt.|
The Pilgrim prospect was staked by Placid Oil Company in 1972 and explored by them until 1977 (Kurtak and others, 2002). It was also one of the prospects listed in a report by Ventures Resources Corp. (1999) about their exploration of the Chandalar Copper Belt.The Pilgrim prospect is at the northeast end of the Chandalar Copper Belt. The rocks in the vicinity are mainly lower Paleozoic greenschist, calcareous schist, and marble, in thrust contact with Devonian Hunt Fork Shale and Silurian and Devonian, Skajit Limestone (Brosgé and Reiser, 1964). A sample with garnet, epidote, actinolite, pyrite, sphalerite, and chalcopyrite contained 12.4 percent copper, 0.24 percent zinc, and 71 parts per million silver (Newberry and others, 1986). WGM Inc. (1980) identified coarse-grained pyrite and chalcopyrite in quartz-sericite schist and chlorite schist; grab samples contained up to 3.8 percent copper. Kurtak and others (2002) found similar mineralization in sericite-quartz schist and as well small amounts of disseminated chalcopyrite, and pyrite in calc-silicate rocks. Newberry and others (1986) classified the Pilgrim prospect as a copper(-zinc-silver) skarn, and Newberry and others (1997) classified it as a calcic copper skarn.
|Geologic map unit||(-149.020260488673, 67.7540054432642)|
|Mineral deposit model||Cu skarn deposit (Cox and Singer, 1986; model 18b).|
|Mineral deposit model number||18b|
|Age of mineralization||Devonian(?) based on Early Devonian Pb/Pb zircon ages from the nearby Baby Creek batholith and Horace Mountain plutons (Dillon and others, 1996).|
|Alteration of deposit||Local development of masses of skarn in calcareous rocks.|
|Workings or exploration||The Pilgrim prospect was staked by Placid Oil Company in 1972 and explored by them until 1977 (Kurtak and others, 2002). It was also one of the prospects listed in a report by Ventures Resources Corp. (1999) about their exploration of the Chandalar Copper Belt.|
|Indication of production||None|
This prospect is on Doyon Ltd. selected lands; for more information, contact Doyon Ltd., Fairbanks, Alaska.MAS No. 0020310143
Dillon, J.T., Reifenstuhl, R.R., and, Harris, G.W., 1996, Geologic map of the Chandalar C-5 quadrangle, southeastern Brooks Range, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 104, 2 sheets, scale 1:63,360.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska, 2 vols.: Bureau of Land Management, Alaska Technical Report 50, 845 p.
Newberry, R.J., Allegro, G.L., Cutler, S.E., Hagen-Levelle, D.D., Adams, D.D., Nicholson, L.C., Weglarz, T.B., Bakke, A.A., Clautice, K.H., Coulter, G.A., Ford, M.J., Myers, G.L., and Szumigala, D.J., 1997, Skarn deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 355-395.
Newberry, R.J., Dillon, J.T., and Adams, D.D., 1986, Regionally metamorphosed calc-silicate-hosted deposits of the Brooks Range, northern Alaska: Economic Geology, v. 81, p. 1728-1752.
Nicholson, L.M., 1990, Porphyry copper, copper skarn, and volcanogenic massive sulfide occurrences in the Chandalar copper district, Alaska: Fairbanks, University of Alaska, M.Sc. thesis, 164 p.
Ventures Resource Corp., 1999, 1999 Annual Report: Ventures Resource Corporation, 36 p.
WGM Inc., 1980, 1979 annual profess report, Block 5-Wiseman Chandalar Cop[er Belt: Unpublished report 80-06 for Doyon Ltd., 28 p. (on file at Doyon Ltd., Fairbanks, Alaska).
|Reporters||J.M. Britton (Anchorage, Alaska); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|