Surface Exposure Geochronology Using Cosmogenic Nuclides: Applications in Antarctic Glacial Geology
نویسنده
چکیده
by EDWARD JEREMY BROOK B. S., Duke University, 1985 M. S., University of Montana, 1988 submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY and the WOODS HOLE OCEANOGRAPHIC INSTITUTION September 1993 © Edward J. Brook 1993 The author hereby grants to MIT and WHOI permission to reproduce and distribute copies of this thesis document in whole or in part.
منابع مشابه
Applications of cosmogenic nuclides to Laurentide Ice Sheet history and dynamics
Ice sheets play a fundamental role within Earth’s climate system and in shaping landscapes. Despite extensive research, the maximum extent and basal dynamics of the Laurentide Ice Sheet (LIS) during the last glacial cycle remain elusive and debated in many areas. Recently, cosmogenic nuclides (e.g., 36Cl, 26Al, 10Be) have played an important role in improving our understanding of LIS extent and...
متن کاملCosmogenic nuclide surface exposure dating of boulders on last-glacial and late-glacial moraines, Lago Buenos Aires, Argentina: Interpretive strategies and paleoclimate implications
Cosmogenic nuclide surface exposure dating of boulders on last-glacial and late-glacial moraines, Lago Buenos Aires, Argentina: Interpretive strategies and paleoclimate implications D.C. Douglass , B.S. Singer, M.R. Kaplan, D.M. Mickelson, M.W. Caffee Department of Geology and Geophysics, University of Wisconsin-Madison, 1215 W. Dayton St., Madison, WI 53706, USA School of GeoSciences, Universi...
متن کاملChapter 4: Principles of Exposure Age Determination Using Terrestrial in Situ Produced Cosmogenic Nuclides
After the discovery of the cosmic radiation in the 1910’s, Grosse (1934) was the first who suggested that the cosmic radiation could produce radioactive nuclides at the surface of the Earth. The next step towards the utilisation of cosmogenic nuclides in earth sciences was the discovery of Libby (Libby et al. 1949) in the late 1940s: during its interaction with the atmosphere, cosmic radiation ...
متن کاملTerrestrial in situ cosmogenic nuclides: theory and application
The cosmogenic nuclide exposure history method is undergoing major developments in analytical, theoretical, and applied areas. The capability to routinely measure low concentrations of stable and radioactive cosmogenic nuclides has led to new methods for addressing long-standing geologic questions and has provided insights into rates and styles of sur"cial processes. The di!erent physical and c...
متن کاملQuantifying glacial moraine age, denudation, and soil mixing with cosmogenic nuclide depth profiles
[1] Glacial boulders and soils on moraines are often dated to quantify the timing of glaciations and/or rates of chemical weathering in moraine chronosequences. A common assumption is that moraine crest erosion and soil mixing are unimportant. However, several studies suggest moraine denudation may be substantial. We evaluate the magnitude of moraine denudation and soil mixing in the Pinedale (...
متن کامل