Wrangellia geologic mapping

Project Details

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• Project ID:

  1347

• Nickname/Abbreviation:

  Wrangellia

• Parent Project:

  Alaska strategic and critical minerals assessment

• Status:

  Complete

• Description:

  DGGS completed a multi-year geologic mapping and mineral resource potential assessment of western Wrangellia, a geological region with high potential to host deposits of nickel, copper, cobalt, and platinum group elements (PGEs). The project area stretches from Talkeetna to Slana and includes parts of the eastern Alaska Range and the Talkeetna Mountains.
  
  The goal was to build an improved understanding of the area's geology and mineralization. The resulting data and reports benefit mineral exploration, government assessments of mineral potential, and the broader scientific understanding of the geology of southcentral Alaska. Our maps extend PGE-prospective geology into the Talkeetna Mountains and resolve some of the structural complexity that surrounds the PGE prospects in the eastern Alaska Range.
  
  This project was funded by the Strategic and Critical Minerals Assessment program. The 2014 field season received matching funds from the USGS's STATEMAP program.

• Project Date(s):

  2013 - 2020

• Primary Contact:

  Twelker, Evan

• DGGS section:

  Mineral Resources

• Alternate Url:

  Find out more...

• Project Participants:

  Rainer J. Newberry, Lawrence K. Freeman, Karri R. Sicard, Evan Twelker, Erik N. Bachmann, Amy L. Tuzzolino, Thomas C. Wright, David A. Reioux, Alicja Wypych, Lauren L. Lande, Trevor Waldien, Peter E. Illig

• Completed/Inactive Related Sub-Projects:

  • • Talkeetna Mountains C-4 - (2014)

• Stations/Samples:

  View list

Publications

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RI 2020-6

Twelker, Evan, Lande, L.L., Newberry, R.J., Wypych, Alicja, Sicard, K.R., and Freeman, L.K., 2020, Magmatic and structural framework of PGE and other mineralization in northwestern Wrangellia, central Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2020-6, 72 p. https://doi.org/10.14509/30468

RI 2020-7

Twelker, Evan, Waldien, T.S., Newberry, R.J., Freeman, L.K., Sicard, K.R., Lande, L.L., Wypych, Alicja, Reioux, D.A., and Bachmann, E.N., 2020, Bedrock geologic map of the eastern Denali Highway area, Mount Hayes, Healy, and Talkeetna Mountains quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2020-7, 1 sheet, scale 1:100,000. https://doi.org/10.14509/30469

RDF 2020-3

Holm-Denoma, C.S., Sicard, K.R., and Twelker, Evan, 2020, U-Pb geochronology of igneous and detrital zircon samples from the Tok River area, eastern Alaska Range, and Talkeetna Mountains, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2020-3, 20 p. https://doi.org/10.14509/30439

RDF 2018-3

Naibert, T.J., Benowitz, J.A., Wypych, Alicja, Sicard, K.R., and Twelker, Evan, 2018, 40Ar/39Ar data from the Tanacross D-1 and D-2, Big Delta B-4 and B-5, and Mount Hayes A-6 quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2018-3, 15 p. https://doi.org/10.14509/30112

RDF 2017-2

Todd, Erin, Kylander-Clark, Andrew, Wypych, Alicja, Twelker, Evan, and Sicard, K.R., 2017, U-Pb and Lu-Hf isotope, age, and trace-element data from zircons at four sites in the western Alaska Range and Talkeetna Mountains, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2017-2, 7 p. https://doi.org/10.14509/29717

RDF 2017-1

Benowitz, J.A., Layer, P.W., Wypych, Alicja, and Twelker, Evan, 2017, 40Ar/39Ar data from rocks collected in the 2015 Wrangellia mineral assessment project area, Mount Hayes A-5, Mount Hayes B-6, and Talkeetna Mountains D-2 quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2017-1, 9 p. https://doi.org/10.14509/29699

RDF 2016-8

Twelker, Evan, and O'Sullivan, P.B., 2016, U-Pb zircon age data from meta-igneous rocks in the Clearwater Mountains, Mount Hayes A-6 Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2016-8, 17 p. https://doi.org/10.14509/29663

RDF 2015-16

Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2015, Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-16, 4 p. https://doi.org/10.14509/29518

PIR 2015-6

Twelker, Evan, Hubbard, T.D., Wypych, Alicja, Sicard, K.R., Newberry, R.J., Reioux, D.A., Freeman, L.K., and Lande, L.L., 2015, Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2015-6, 16 p., 1 sheet, scale 1:50,000. https://doi.org/10.14509/29470

RDF 2015-10

Benowitz, J.A., Layer, P.W., Wypych, Alicja, and Twelker, Evan, 2015, 40Ar/39Ar data from the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-10, 19 p. https://doi.org/10.14509/29454

RDF 2014-22

Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2014, Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-22, 4 p. https://doi.org/10.14509/29140

RDF 2014-18

Benowitz, J.A., Layer, P.W., and Twelker, Evan, 2014, 40Ar/39Ar data from rocks collected in 2013 in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-18, 10 p. https://doi.org/10.14509/29119

RDF 2014-3

Twelker, Evan, Bachmann, E.N., Freeman, L.K., Newberry, R.J., Reioux, D.A., Sicard, K.R., Tuzzolino, A.L., Wright, T.C., and Wypych, Alicja, 2014, Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2014-3, 6 p. https://doi.org/10.14509/27181

Posters and Presentations

Twelker, Evan, 2017

Twelker, Evan, 2017, Geologic mapping in the Talkeetna Mountains and eastern Alaska Range: A story of mineralization and deformation (presentation): Alaska Geological Society Luncheon, February 21, 2017: Alaska Division of Geological & Geophysical Surveys, 49 p. https://doi.org/10.14509/29836

Wypych, Alicja and others, 2015

Wypych, Alicja, Twelker, Evan, Lande, L.L., and Newberry, R.J., 2015, Along-strike geochemical variations in the Late Triassic Nikolai magmatic system, Wrangellia, central Alaska (poster number V31D-3059): American Geophysical Union 2015 Fall Meeting, December 14-18, 2015: Alaska Division of Geological & Geophysical Surveys, 1 sheet. https://doi.org/10.14509/29567

Twelker, Evan and Lande, Lauren, 2015

Twelker, Evan, and Lande, Lauren, 2015, DGGS geological investigations in western Wrangellia (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 1-5, 2015: Alaska Division of Geological & Geophysical Surveys, 45 p. https://doi.org/10.14509/29531

Lande, Lauren and others, 2015

Lande, Lauren, Newberry, R.J., and Twelker, Evan, 2015, A petrological model for emplacement of the ultramafic Ni-Cu-PGE Alpha complex, eastern interior Alaska (poster): Geological Society of America Cordilleran Section - 111th Annual Meeting, Anchorage, Alaska, May 11-13, 2015: Alaska Division of Geological & Geophysical Surveys, 1 sheet. https://doi.org/10.14509/29480

Twelker, Evan and others, 2014

Twelker, Evan, Wypych, Alicja, Sicard, K.R., Newberry, R.J., Freeman, L.K., Reioux, D.A., and Lande, Lauren, 2014, Preliminary results from 2014 geologic mapping in the Talkeetna Mountains, Alaska (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 3-9, 2014: Alaska Division of Geological & Geophysical Surveys, 28 p. https://doi.org/10.14509/29160

Twelker, Evan and others, 2014

Twelker, Evan, Wypych, Alicja, and Newberry, R.J., 2014, New data and insight on the Late Triassic Wrangellia magmatic Ni-Cu-Co-PGE system in the Talkeetna Mountains, central Alaska (poster): Society of Economic Geologists 2014 Conference, September 27-30, 2014: Alaska Division of Geological & Geophysical Surveys, 1 sheet. https://doi.org/10.14509/29139

Twelker, Evan and Burns, L.E., 2014

Twelker, Evan, and Burns, L.E., 2014, New geochemical and geophysical data from the western Wrangellia minerals assessment area (presentation): Alaska Miners Association 24th Biennial Mining Conference, Fairbanks, Alaska April 7-13, 2014: Alaska Division of Geological & Geophysical Surveys, 34 p. https://doi.org/10.14509/27284

Twelker, Evan and others, 2013

Twelker, Evan, Newberry, R.J., Freeman, L.K., Sicard, K.R., Reioux, D.A., and Bachmann, E.N., 2013, DGGS geologic and mineral-resource assessment of the western Wrangellia terrane, central Alaska: Initial progress report (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 4-10, 2013: Alaska Division of Geological & Geophysical Surveys, 25 p. https://doi.org/10.14509/26821

Annual Reports

AR 2014-B

DGGS Staff, 2015, Mineral Resources FY15 project descriptions, in DGGS Staff, Alaska Division of Geological & Geophysical Surveys Annual Report 2014: Alaska Division of Geological & Geophysical Surveys Annual Report 2014-B, p. 39-51. https://doi.org/10.14509/29181