Geochemical sampling results from Bureau of Mines investigations in the Valdez Creek Mining District, Alaska.
Anchorage, AK: U.S. Department of the Interior, Bureau of Mines, OFR 34-90, 1990 Jan; :1-218
The Bureau of Mines, in cooperation with the Alaska Division of Geological and Geophysical Surveys, conducted field investigations during the years 1987 through 1989 in the 5.7-million-acre Valdez Creek Mining District (VCMD), located in south-central Alaska. The objective of the VCMD investigation was to evaluate the mineral resources and the mineral development potential of the mining district. The VCMD investigation is part of the Bureau's continuing statewide mining district evaluation program. This report contains a complete compilation of the geochemical data base that was generated as a result of the Bureau's field activities in the VCMD. Field work included (1) reconnaissance placer and rock sample collection and (2) examination and sampling of reported mines, prospects, and mineral occurrences. A total of 19 new mineral occurrences were identified as a result of this investigation. Reconnaissance placer sampling resulted in the identification of 10 previously unreported placer occurrences that primarily contain gold; however, some contain subsidiary platinum-group metals and/or tin. Reconnaissance lode sampling resulted in the identification of two gold-silver lode occurrences, three platinum-group metal (PGM) lode occurrences that contain elevated quantities of subsidiary chromium, nickel, and/or cobalt, three lode copper occurrences that contain subsidiary molybdenum or zinc, and one lode zinc occurrence.
Prospecting; Sampling; Exploitation; Placers; Metalliferous-mineral-deposits; Precious-metal-ore-deposits; Molybdenum-ore-deposits; Copper-ore-deposits; Tin-ore-deposits; Zinc-ore-deposits; Geology; Resource-potential; Resource-development; Mineral-economics; Feasibility-studies; Mineral-resources; Resource-assessment; Mineral-exploration
Anchorage, AK: U.S. Department of the Interior, Bureau of Mines, OFR 34-90