Stratiform Massive Sulfide Deposits in the Mt. Henry Clay Area, Southeast Alaska

Details

• Personal Author:
  Still JC
• Description:
  The Bureau of Mines in 1983 examined the Skagway B-4 quadrangle in southeast Alaska for volcanic host rocks similar to those that host the stratiform world class windy craggy copper-cobalt-gold deposit located across the U.S.-Canadian border 50 miles to the northwest. Such rocks were found between the Jarvis and Boundary Glaciers in what is now called the Mt. Henry Clay area. This area was mapped and investigated for stratiform deposits similar to the windy craggy deposit. Investigations indicate that the Mt. Henry Clay area massive sulfide occurrences are stratiform, have a similar mineralogy, and are in a geologic setting similar to that of the windy craggy deposit. However, the windy craggy ore zone consists predominately of pyrrhotite-pyrite-chalcopyrite while the occurrences in the Mt. Henry Clay area consist predominately of barite-sphalerite-pyrite. During 1983 the Jarvis Glacier occurrences, which contain small amounts of cobalt, were discovered in the area by Bureau personnel; commercial mining personnel discovered the important Mt. Henry Clay zinc-copper-silver-gold deposit. Investigations indicate that the Mt. Henry Clay area is highly mineralized and a target for the discovery of stratiform massive sulfide deposits. [Description provided by NIOSH]
• Subjects:
  Copper Minerals Mining Occupational Health Safety Sulfides
• Keywords:
  Mining industry; Mining; Alaska; Volcanic ash; Cobalt; Copper; Gold; Mineral deposits; Minerals; Geologic strata; Rock falls; Sulfides; Zinc; Silver
• Series:
  Mining Publications
• Subseries:
  Open File Report
• Document Type:
  Text
• Genre:
  Conference Publications
• 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:
  1-65
• NIOSHTIC Number:
  nn:10003893
• Citation:
  For Reference Only At Bureau Libraries 1984 :1-65
• CAS Registry Number:
  Cobalt (CAS RN 7440-48-4) ; Copper (CAS RN 7440-50-8) ; Gold (CAS RN 7440-57-5) ; Silver (CAS RN 7440-22-4) ; Zinc (CAS RN 7440-66-6)
• Federal Fiscal Year:
  1984
• Performing Organization:
  Alaska Field Operations Center
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6a663570d725851cbb5d2ecdaa283e5373098d8b74a932fc8a3dce66f69d6e01e75ed014863cd6819742ffeb59833d17fac088a661d0aecd61c9f1d77347d8a0
• Download URL:
  https://stacks.cdc.gov/view/cdc/235379/cdc_235379_DS1.pdf
• File Type:
  [PDF - 3.05 MB ]