Search

Your search keyword '"Twelker, Evan"' showing total 11 results
Start Over Author "Twelker, Evan" Topic geological surveys
11 results on '"Twelker, Evan"'

6. Updates on DGGS Geologic Mapping Efforts in Eastern Interior Alaska.

Author

Naibert, Travis J., Wypych, Alicja, Twelker, Evan, Gavel, Michelle M., Wildland, Alec D., Newberry, Rainer J., Szumigala, David J., Barrera, Michael L., and Fessenden, Serena N.

Subjects
GEOLOGICAL maps, GEOLOGICAL mapping, GOLD ores, MUSCOVITE, GEOLOGICAL surveys, SHEAR zones
Published
2022

8. MAJOR-OXIDE, MINOR-OXIDE, AND TRACE-ELEMENT GEOCHEMICAL DATA FROM ROCKS IN THE STYX RIVER AREA, LIME HILLS C-1 QUADRANGLE, LIME HILLS, MCGRATH, TALKEETNA, AND TYONEK QUADRANGLES, ALASKA.

Author

Sicard, Karri R., Wypych, Alicja, Twelker, Evan, Bachmann, Erik N., Freeman, Larry K., Newberry, Rainer J., Reioux, David A., Tuzzolino, Amy L., and Wright, Thomas C.

Subjects
GEOLOGICAL surveys, RARE earth metals, PRECIOUS metals, IGNEOUS intrusions
Abstract

The article discusses a survey for rare-earth elements and precious minerals conducted by the Alaska Division of Geological & Geophysical Surveys (DGGS) along Styx River in the Lime Hills C-1 Quadrangle. Plutonic complexes in the area are noted. Collection, preparation and analysis of rock samples are described.

Published
2014

9. 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.

Author

Twelker, Evan, Bachmann, Erik N., Freeman, Larry K., Newberry, Rainer J., Reioux, David A., Sicard, Karri R., Tuzzolino, Amy L., Wright, Thomas C., and Wypych, Alicja

Subjects
*GEOCHEMICAL prospecting, *MAFIC rocks, *GEOLOGICAL surveys, *PROSPECTING
Abstract

The article discusses the geochemical exploration of mafic intrusions in the Wrangellia terrane and the Talkeetna and Mount Hayes Quadrangles in Alaska. Collection and preparation protocols followed by the Division of Geological & Geophysical Surveys (DGGS) are indicated. Analytical procedures for each type of sample is presented.

Published
2014

10. FIELD STATION LOCATIONS AND MAGNETIC SUSCEPTIBILITY DATA COLLECTED IN 2019 FOR THE EASTERN TANACROSS PROJECT, TANACROSS AND NABESNA QUADRANGLES, ALASKA.

Author

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

Subjects
*MAGNETIC susceptibility, *GEOLOGICAL surveys, *GEOLOGICAL mapping, *GEOPHYSICAL surveys, *MINES & mineral resources, *HYDROGEN as fuel
Published
2020

11. NEW GEOCHEMICAL AND GEOPHYSICAL DATA FROM THE WESTERN WRANGELLIA MINERALS ASSESSMENT AREA.

Author

Twelker, Evan and Burns, Laurel

Subjects
*MINERALS, *GEOCHEMICAL prospecting, *GEOPHYSICAL surveys, *GEOLOGICAL surveys, *GEOCHEMISTRY
Abstract

The article presents the result of the geochemical and geophysical assessment conducted on the western Wrangellia minerals area by the Alaska Division of Geological & Geophysical Surveys. Findings highlighted include the project objectives, the components of the geological/geochemical program and the two challenges in the project. Also presented are the scenarios in the Ni-Cu-PGE deposit-forming processes.

Published
2014

Catalog

Books, media, physical & digital resources
See catalog results