Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Tok area, Tanacross A-5, A-6, and parts of adjacent quadrangles, Alaska

Description

The Tok project area is adjacent to the Delta mineral belt volcanogenic massive-sulfide (VMS) district, the Peak gold-silver-copper skarn, and structurally controlled gold and antimony mineralization in the Stibnite Creek and White Gold areas. The project area also includes the Noah prospect, an intrusion-related copper prospect. Whereas the Delta mineral belt has been extensively mapped and explored, the detailed mapping does not continue into the 2015 Tok project area. In this area, only reconnaissance mapping has been conducted. The combination of a lack of detailed mapping, the industry interest in the adjacent areas, and the geophysical data findings prompted the Alaska Division of Geological & Geophysical Surveys (DGGS) mineral resources group to work in this area. DGGS geologists carried out a geologic reconnaissance mapping project in the Tanacross A-5, A-6, and parts of adjacent quadrangles from June 18 through 28, 2015. This dataset includes two samples with elevated gold, 1.3 and 14.5 ppm, accompanied with very high arsenic values (both over 10,000 ppm) and antimony values (352 and 97.4 ppm). The sample containing 14.5 ppm Au, 305 ppm Bi and 11.1 ppm Te (15ET026) was collected from sulfide pods in schist adjacent to a granitic intrusion near the Noah prospect, and the sample containing 1.3 ppm Au (15KS007) was collected from quartz veining in a fault zone. Major element chemistry has been obtained on the metamorphic rocks to distinguish between igneous and sedimentary protoliths of the rocks using criteria proposed by Dashevsky and others (2003) and on igneous rocks to characterize and differentiate Mesozoic and Cenozoic igneous deposits in the area. The analytical data tables associated with this report are being released in digital format as comma-delimited text (CSV) files.

Resources

Name Format Description Link
0 CSDGM IMPORT ERROR: No digtinfo/formcont http://doi.org/10.14509/29517
0 http://doi.org/10.14509/29517
0 http://dggs.alaska.gov/pubs/id/12871
0 http://dx.doi.org/10.14509/29444
0 http://dggs.alaska.gov/pubs/id/14648
0 http://dx.doi.org/10.14509/29451
0 http://dx.doi.org/10.14509/2923
0 http://dx.doi.org/10.14509/29347

Tags

  • antimony
  • tanacross quadrangle
  • gold prospect
  • polymetallic vein
  • porphyry
  • massive sulfides
  • massive sulfide prospect
  • metamorphic deposit
  • major oxides
  • vein deposit
  • volcanogenic massive sulfide
  • analyses
  • tertiary
  • metamorphic
  • chemistry
  • arsenic
  • plutonic hosted
  • skarn
  • metasedimentary rocks
  • geochemistry
  • trace geochemical
  • gold
  • minor oxides
  • analyses and sampling
  • tok
  • massive sulfide deposit
  • geochemical data
  • trace elements
  • geochemical surveys
  • massive sulfide occurrence
  • metavolcanic rocks
  • lab methods
  • metamorphic rocks
  • bedrock geologic map
  • analytical results
  • delta mineral belt
  • metallogenesis
  • triassic
  • analytical lab results

Topics

  • Local Government

Categories