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Your search keyword '"Twelker, Evan"' showing total 18 results
Start Over Author "Twelker, Evan" Language english Journal raw data file (alaska division of geological & geophysical surveys) Region alaska
18 results on '"Twelker, Evan"'

1. FIELD STATION LOCATIONS AND MAGNETIC SUSCEPTIBILITY DATA FOR THE CHENA--POGO AND MOUNT HARPER PROJECTS, BIG DELTA AND CIRCLE QUADRANGLES, ALASKA, COLLECTED JUNE-SEPTEMBER 2023.

Author

Gavel, Michelle M., Twelker, Evan, Wypych, Alicja, Naibert, Travis J., Newberry, Rainer J., Szumigala, David J., Wildland, Alec D., Barrera, Michael L., Biegel, Jenna N., Harvey, David A., Ketcham, Richard A., Muller, Isabella P., and Reagan, Sean P.

Subjects
*MAGNETIC susceptibility, *GEOPHYSICAL surveys, *GEOLOGICAL mapping, *GEOLOGICAL maps, *LOCATION data
Abstract

During the 2023 field season, geologists from the Alaska Division of Geological & Geophysical Surveys conducted bedrock geologic mapping in the Big Delta and Circle quadrangles in Alaska. The project areas are of interest for potential mineral resource development, including gold and copper deposits. This report provides field station locations, rock descriptions, and magnetic susceptibility measurements. The data is available for download from the DGGS website. The project aims to produce accurate geologic maps to support mineral resource exploration in eastern Interior Alaska. [Extracted from the article]

Published
2023
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3. GEOCHEMICAL DATA FROM SAMPLES COLLECTED IN 2022 FOR THE MOUNT HARPER GEOLOGIC MAPPING PROJECT, BIG DELTA, MOUNT HAYES, AND EAGLE QUADRANGLES, ALASKA.

Author

Wypych, Alicja, Twelker, Evan, Naibert, Travis J., Gavel, Michelle M., Newberry, Rainer J., Szumigala, David J., Wildland, Alec D., Barrera, Michael L., Harvey, David A., Muller, Izabella P., Fessenden, Serena N., and Blackwell, Noel J.

Subjects
*GEOLOGICAL mapping, *GEOLOGICAL maps, *INDUCTIVELY coupled plasma atomic emission spectrometry
Published
2023

4. FIELD STATION LOCATIONS AND MAGNETIC SUSCEPTIBILITY DATA COLLECTED IN 2022 FOR THE MOUNT HARPER PROJECT, EAGLE, BIG DELTA, AND MOUNT HAYES QUADRANGLES, ALASKA.

Author

Gavel, Michelle M., Twelker, Evan, Wypych, Alicja, Naibert, Travis J., Newberry, Rainer J., Szumigala, David J., Wildland, Alec D., Barrera, Michael L., Blackwell, Noel J., Fessenden, Serena N., Harvey, David A., and Muller, Isabella P.

Subjects
*MAGNETIC susceptibility, *GEOLOGICAL maps, *GEOLOGICAL mapping, *ACQUISITION of data
Published
2023
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13. 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

14. FIELD STATION LOCATIONS AND MAGNETIC SUSCEPTIBILITY DATA COLLECTED IN 2020-2021 FOR THE WESTERN TANACROSS PROJECT, TANACROSS AND EAGLE QUADRANGLES, ALASKA.

Author

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

Subjects
MAGNETIC susceptibility, GEOLOGICAL maps, METALLOGENY, GEOPHYSICAL surveys, ACQUISITION of data, GEOLOGICAL mapping, HYDROTHERMAL deposits
Published
2022
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15. FIELD STATION LOCATIONS AND MAGNETIC SUSCEPTIBILITY DATA COLLECTED IN 2021 FOR THE TAYLOR MOUNTAINPROJECT, TANACROSS AND EAGLE QUADRANGLES, ALASKA.

Author

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

Subjects
MAGNETIC susceptibility, GEOLOGICAL maps, METALLOGENY, GEOPHYSICAL surveys, ACQUISITION of data, GEOLOGICAL mapping, HYDROTHERMAL deposits
Published
2022
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16. 40AR/39AR DATA FROM ROCKS COLLECTED IN 2013 IN THE WRANGELLIA MINERAL ASSESSMENT AREA, GULKANA, HEALY, MOUNT HAYES, AND TALKEETNA MOUNTAINS QUADRANGLES, ALASKA.

Author

Benowitz, Jeff A., Layer, Paul W., and Twelker, Evan

Subjects
GEOCHRONOMETRY, CRYSTALLINE rocks, METAMORPHIC rocks, JURASSIC Period, CRETACEOUS Period
Abstract

This DGGS Raw Data File presents 40Ar/39Ar age dating results from selected mafic to intermediate intrusions encountered during a geological and geochemical resource assessment project in the Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles. Three intrusions returned mid-Cretaceous crystallization ages, while one olivine gabbro returned a Late Triassic crystallization age. Two altered or metamorphosed samples yielded Late Jurassic and Early Cretaceous ages. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. Products included in this data release are: a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra, Ca/K and Cl/K ratios. All components of this data release are available on the DGGS website. [ABSTRACT FROM AUTHOR]

Published
2014
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17. 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

18. 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

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