Information Circular 9091: Placer Gold Sampling in and near the Chugach National Forest, Alaska

Details

• Personal Author:
  Fechner, Steven A. ; Hoekzema, Robert B.
• Description:
  The Bureau of Mines and U.S. Geological Survey completed a 4-yr (1979-82) mineral appraisal of the Chugach National Forest (CNF), AK. This report summarizes the Bureau's placer gold studies in the cnf. Placer mining from the mid-1890's through 1982 produced an estimated 133,800 oz of gold, of which two-thirds was produced prior to 1920. As much as 6,800 oz of placer gold was produced from 1979 to 1982. Most production came from Crow, Canyon, and Resurrection Creeks. Five types of placer gold deposits were identified in the CNF: (1) alluvial placers, (2) bench placers, (3) eluvial placers, (4) glacial placers, and (5) marine placers. Placer sampling indicated a potential for gold production from alluvial and bench placers associated with historically mined drainages such as Crow, Canyon, Resurrection, Sixmile, and Mills Creeks and from unmined drainages including the Avery, Kings, Snow, Copper, and Tasnuna Rivers and several smaller streams throughout the CNF. Results of fineness tests indicated that gold from the CNF ranges from 45 to over 950 fine. Subsequent investigations in drainages with anomalous placer sample values also identified previously unknown lode mineralization. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Information Circular
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Alaska ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  AFOC - Alaska Field Operations Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  47 pdf pages
• NIOSHTIC Number:
  nn:10005373
• Federal Fiscal Year:
  1986
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ec49478823ce72fcfdaf1113d2e3eaf17e777d3d0aa50be82c3899ee289169c69c628c2d04f1f99b51ba6b542b021021a28efcfa5175bee34da737a0ee177469
• Download URL:
  https://stacks.cdc.gov/view/cdc/206090/cdc_206090_DS1.pdf
• File Type:
  [PDF - 4.43 MB ]