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Your search keyword '"Twelker, Evan"' showing total 7 results
Start Over Author "Twelker, Evan" Topic trace elements Publication Year Range Last 10 years
7 results on '"Twelker, Evan"'

3. 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.

Author

Wypych, Alicja, Twelker, Evan, Freeman, Larry K., Lande, Lauren, Newberry, Rainer J., Reioux, David A., and Sicard, Karri R.

Subjects
*RARE earth metals, *MAGMAS, *METHODOLOGY, *TRACE elements, *MINERALIZATION
Abstract

The article discusses the exploration for rare-earth elements by the Alaska Division of Geological & Geophysical Surveys at the Talkeetna Mountains C-4, C-3, and B-4 quadrangles off the western Wrangellia terrane. Sample collection and geopositioning for prospective Late Triassic magmatic Ni-Cu-Co-PGE deposits is described. Also included is the analytical methodology for specimen prepared with the PREP-31 package by ALS Minerals group under ISO/IEC 17025-2005 guidelines for trace element test.

Published
2014

4. GEOCHEMICAL DATA FROM SAMPLES COLLECTED IN 2020 AND 2021 FOR THE WESTERN TANACROSS PROJECT, TANACROSS QUADRANGLE, ALASKA.

Author

Wypych, Alicja, Gavel, Michelle M., Naibert, Travis J., Avirett, Dylan F., Barrera, Michael L., Hubbard, Angela K., Newberry, Rainer J., Regan, Sean P., Twelker, Evan, Wildland, Alec D., and Wyatt, W. Chris

Subjects
*GEOLOGICAL surveys, *LOCATION data, *FIRE assay, *MINES & mineral resources, *GEOLOGICAL maps, *TRACE elements
Published
2022
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7. MAJOR-OXIDE AND TRACE-ELEMENT GEOCHEMICAL DATA FROM ROCKS COLLECTED IN THE TOK RIVER AREA, TANACROSS A-5 AND A-6 QUADRANGLES, ALASKA IN 2016.

Author

Wypych, Alicja, Sicard, Karri R., Gillis, Robert J., Lande, Lauren L., Naibert, Travis J., Newberry, Rainer J., Twelker, Evan, Werdon, Melanie B., and Willingham, Amanda L.

Subjects
*GEOLOGICAL mapping, *GEOPHYSICAL surveys, *ROCK analysis, *FLUX (Metallurgy), *TRACE elements
Abstract

The article discusses the Division of Geological & Geophysical Surveys (DGGS) geochemical sampling project and geologic mapping in the Tok River area, Tanacross A-5 and A-6 quadrangles, Alaska in 2016. Topics including rock samples collection such as mineralized rock and igneous rock for trace-element geochemistry purposes, rock samples preparation by ALS Geochemistry, and sample type analysis using flux digestion and elemental tests.

Published
2016

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