Eastern Tanacross

Project Details

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• Project ID:

  1588

• Nickname/Abbreviation:

  Eastern Tanacross

• Parent Project:

  Earth Mapping Resources Initiative (Earth MRI)

• Status:

  Active

• Description:

  The Eastern Tanacross project will complete a 1:100,000 scale bedrock geologic map of a 1900 square mile area of the eastern Tanacross Quadrangle and part of the Nabsena Quadrangle. It is funded through the USGS Earth MRI program and targets an area of Alaska prospective for rare earth elements, other critical minerals, and conventional minerals including gold, copper, molybdenum, and silver. USGS STATEMAP grant no. G19AC00262. Find field photos taken during this project. This project area is also part of the Yukon-Tanana Uplands compilation map funded by grant no. G21AC10706

• Project Date(s):

  2019 - present

• Primary Contact:

  Twelker, Evan

• DGGS section:

  Mineral Resources

• Project Participants:

  Rainer J. Newberry, Melanie B. Werdon, Jennifer E. Athey, Karri R. Sicard, Evan Twelker, Alicja Wypych, Travis J. Naibert, W. Chris Wyatt, Alec D. Wildland, Sean P. Regan, Julian A. Lopez

• Stations/Samples:

  View list

Publications

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RDF 2024-32

Naibert, T.J., Heizler, M.T., Twelker, Evan, Newberry, R.J., and Wypych, Alicja, 2024, 40Ar/39Ar geochronology data from the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2024-32, 16 p. https://doi.org/10.14509/31454

PIR 2021-4

Wildland, A.D., Wypych, Alicja, Regan, S.P., and Holland, Mark, 2021, U-Pb zircon ages from bedrock samples collected in the Tanacross and Nabesna quadrangles, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2021-4, 47 p. https://doi.org/10.14509/30732

RI 2021-5

Twelker, Evan, ed., 2021, Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5, 86 p. https://doi.org/10.14509/30734

RI 2021-5A

Twelker, Evan, Newberry, R.J., Wypych, Alicja, Naibert, T.J., Wildland, A.D., Sicard, K.R., Regan, S.P., Athey, J.E., Wyatt, W.C., and Lopez, J.A., 2021, Bedrock geologic map of the Ladue River-Mount Fairplay area, Tanacross and Nabesna quadrangles, Alaska, in Twelker, Evan, ed., Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5A, p. 1-32, 1 sheet, scale 1:100,000. https://doi.org/10.14509/30735

RI 2021-5B

Newberry, R.J., and Twelker, Evan, 2021, Metamorphism of the Ladue River-Mount Fairplay area, in Twelker, Evan, ed., Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5B, p. 33-39. https://doi.org/10.14509/30736

RI 2021-5C

Naibert, T.J., and Wypych, Alicja, 2021, Regional correlation of metamorphic rocks in the Ladue River-Mount Fairplay map area using trace-element geochemistry, in Twelker, Evan, ed., Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5C, p. 40-49. https://doi.org/10.14509/30737

RI 2021-5D

Wildland, A.D., and Naibert, T.J., 2021, Structural geology of the Mount Fairplay-Ladue River area, in Twelker, Evan, ed., Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5D, p. 50-62. https://doi.org/10.14509/30738

RI 2021-5E

Wypych, Alicja, 2021, Geochemistry of the igneous rocks in the Ladue River-Mount Fairplay area, in Twelker, Evan, ed., Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5E, p. 63-76. https://doi.org/10.14509/30739

RI 2021-5F

Twelker, Evan, 2021, Economic geology of the Ladue River-Mount Fairplay area, in Twelker, Evan, ed., Geologic investigation of the Ladue River-Mount Fairplay area, eastern Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2021-5F, p. 77-86. https://doi.org/10.14509/30740

PIR 2021-2

Twelker, Evan, and O'Sullivan, P.B., 2021, U-Pb detrital zircon geochronology of Cretaceous-Cenozoic sedimentary rocks in the Ladue River-Mount Fairplay area, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2021-2, 16 p. https://doi.org/10.14509/30683

PIR 2020-1

Newberry, R.J., 2020, The Mount Fairplay igneous complex: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2020-1, 32 p. https://doi.org/10.14509/30463

RDF 2019-9

Naibert, T.J., Twelker, Evan, Wypych, Alicja, Athey, J.E., Newberry, R.J., Lopez, J.A., Regan, S.P., Sicard, K.R., Wildland, A.D., and Wyatt, W.C., 2020, Field station locations and magnetic susceptibility data collected in 2019 for the Eastern Tanacross Project, Tanacross and Nabesna quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2019-9, 2 p. https://doi.org/10.14509/30268

RDF 2019-8

Wypych, Alicja, Twelker, Evan, Naibert, T.J., Athey, J.E., Newberry, R.J., Lopez, J.A., Regan, S.P., Sicard, K.R., Wildland, A.D., and Wyatt, W.C., 2019, Major-oxide and trace-element geochemical data from rocks collected in 2019 for the Eastern Tanacross project, Tanacross and part of Nabesna quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2019-8, 3 p. https://doi.org/10.14509/30267

Posters and Presentations

Emond, A.M. and Twelker, Evan, 2022

Emond, A.M., and Twelker, Evan, 2022, DGGS's completed Yukon-Tanana Upland Earth MRI airborne geophysics program and CY 2023 Mag, Rad, and EM acquisition plans (presentation): Alaska Miners Association Annual Meeting, Anchorage, Alaska, November 8-10, 2022: Alaska Division of Geological & Geophysical Surveys, 31 p. https://doi.org/10.14509/30911

Twelker, Evan and others, 2020

Twelker, Evan, Newberry, R.J., Naibert, T.J., Wypych, Alicja, Sicard, K.R., Regan, S.P., and Wildland, A.D., 2020, New bedrock mapping highlights the importance of brittle and ductile structure in the tectonics and metallogeny of the eastern Yukon-Tanana Upland, Alaska (poster); Cordilleran Tectonics Workshop, Anchorage, Alaska, February 22-23, 2020: Alaska Division of Geological & Geophysical Surveys, 1 sheet. https://doi.org/10.14509/30429

Twelker, Evan and others, 2019

Twelker, Evan, Wypych, Alicja, Sicard, K.R., Naibert, T.J., Athey, J.E., Wyatt, W.C., Newberry, R.J., Regan, S.P., Wildland, A.D., and Lopez, J.A., 2019, Draft (as of 11/5/2019) geologic map of the eastern Tanacross area (poster); Alaska Miners Association Annual Convention, Anchorage, Alaska, November 5-7, 2019: Alaska Division of Geological & Geophysical Surveys, 4 p. https://doi.org/10.14509/30414