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Geochronology Laboratory

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The Geochronology Laboratory at UAF conducts research in determining the ages of rocks and minerals using the 40Ar/39Ar step-heating dating method. Major areas of research emphasis include determining the tectonic history of Alaska and adjacent Russia, determining the relationship between plutonism and ore mineralization and determining the eruptive history of Alaska's volcanoes.

The laboratory has two mass spectrometer systems, a Nuclide system installed in 1970 with an on-line extraction furnace and a VG3600 laser system installed in 1994. We completed over 2000 mass spectrometry analyses on 143 samples in 1993 and 2500 mass spectrometry analyses on 158 samples in 1994 on the Nuclide mass spectrometer system. In 1994 we completed over 1200 mass spectrometry analyses on the newly installed laser system. Many of these analyses were done on research grants and internally supported projects discussed below while others were on externally supported contracts and in support of student theses.

Corporations which supplied support for the geochronology laboratory in exchange for age analyses in 1993 and 1994 include: Placer Dome Inc., ASA Inc., Ryan Lode Mines Inc., Fairbanks Gold Mining Inc., Arco, and Chevron Minerals Division. Universities which provided contract support or collaboration include Michigan State University, Beloit College, Stanford University, University of Pittsburgh, University of Witwatersrand in South Africa, and Lulea University in Sweden. Supporting government agencies include the Alaska Division of Geological and Geophysical Surveys, the U.S. Geological Survey, U.S. Bureau of Land Management and the U.S. Bureau of Mines.

Student thesis work involved investigations of the plutons of the northeastern Brooks Range, the mineralization in the Fairbanks district, the history of the Southwest Nevada Volcanic Field, the igneous and metamorphic rocks in Russia, mineralization in southern Africa and Australia, and the thermal history of the McKinley pluton.

For more information contact Paul Layer or Jeff Drake at 907-474-7010.
e-mail:geology@uaf.edu

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Department of Geology and Geophysics
Reichardt Building Room 308, 900 Yukon Drive
P.O. Box 755780
Fairbanks, AK 99775-5780
phone: (907) 474-7565
fax: (907) 474-5163
 

The University of Alaska Fairbanks is accredited by the Northwest Commission on Colleges and Universities. UAF is an affirmative action/equal opportunity employer and educational institution.

Last modified August 4, 2006 by geology@uaf.edu

 

 

Background Image is a dinosaur track found by 2006 Geology Field Camp students Susi Tomsich and Jeremiah Drewel. Photo compliments of Jeremiah Drewel.