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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 Publisher alaska division of geological & geophysical surveys
7 results on '"Twelker, Evan"'

6. 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

7. 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

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