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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 184 for “"Geochronology"”.
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Geochronology of salt-marsh sediments
<br/>Salt-marsh sediments can provide important achives of past sea levels if they can besecurely dated. This thesis investigates eight methods for dating salt-marsh sediments.These include traditional and established dating methods (¹⁴C dating and theradionuclides ¹³⁷Cs and ²¹ºPb) and more novel …
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The rubidium-strontium geochronology of argillaceous sediments
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1962.
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Re-Os geochronology and geochemistry of Proterozoic sedimentary successions
… of palaeo-seawater. This thesis presents new geochronology data from Proterozoic sedimentary successions and insights into Re-Os systematics of organic-rich sedimentary rocks and petroleum products such as bitumen and oil. New Re-Os ORS geochronology from two drill cores indicate that the …
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Unrecognized complexities of metamorphism : crystallization kinetics, reaction affinity, and geochronology
… using equilibrium thermodynamics and isotope geochronology. Universally employed methods for determining pressure-temperature conditions during regional metamorphism are based on the assumption of chemical equilibrium, and geochronology in metamorphic rocks can suffer from cryptic …
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Surface exposure geochronology using cosmogenic nuclides : applications in Antarctic glacial geology
Cosmogenic 3He, 26A1, and 10Be have been measured in a variety of Antarctic glacial deposits in the McMurdo Sound-Dry Valleys region. The goals of this project were to provide age constraints for Antarctic glacial events, to investigate production mechanisms of 3He, lOBe, and 26 A1 in terrestrial …
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The Porgera gold deposit, Papua New Guinea : geology, geochemistry and geochronology
The Porgera gold deposit, located in the highlands of Papua New Guinea (PNG), contains ~410 tonnes Au and ~890 tonnes Ag, distributed between a large lower-grade ore zone (78.6 million tonnes, 3.5 g/tonne Au, 9.9 g/tonne Ag), and a smaller highgrade zone (5.0 million tonnes, 26.5 g/tonne Au, 22.1 …
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The Porgera gold deposit, Papua New Guinea : geology, geochemistry and geochronology
The Porgera gold deposit, located in the highlands of Papua New Guinea (PNG), contains ~410 tonnes Au and ~890 tonnes Ag, distributed between a large lower-grade ore zone (78.6 million tonnes, 3.5 g/tonne Au, 9.9 g/tonne Ag), and a smaller highgrade zone (5.0 million tonnes, 26.5 g/tonne Au, 22.1 …
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Surface exposure geochronology using cosmogenic nuclides : applications in Antarctic glacial geology
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and the Woods Hole Oceanographic Institution, 1994.
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The geochronology of some plutonic rocks in the Calais area, Maine.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1967.
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Geology and geochronology of the Avawatz Mountains, San Bernardino County, California
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1981.
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U-Pb geochronology of the Acasta Gneiss Complex in Northwest Canada
The Acasta Gneiss Complex in Northwest Canada contains the oldest dated rocks in the world. The gneisses range in age from 4.03-3.6 Ga, as determined by U-Pb dating of zircons (Bowring and Williams 1999). U-Pb dating of xenocrystic cores in these zircons indicates a cryptic record of continental …
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Geochronology of terraced coastal deposits in Calabria and eastern Sicily: tectonic implications
Calabrian Arc and Eastern Sicily (Southern Italy) are characterized by flights of coastal terraces occurring in various geological domains. These features are formed by interaction between the glacio-eustatic sea level changes and Late Quaternary uplift. Thus, by combining ages and elevations of …
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Caledonian structure, metamorphism, geochronology, and tectonics of the Sitas-Singis area, Sweden
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1987.
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Structural geology, metamorphism, and Rb/Sr geochronology of East Hinnøy, North Norway
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.
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Structure, metamorphism, and geochronology of the Singis-Nikkaluokta region, Arctic Scandinavian Caledonides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.
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Zircon Geochronology of Ash Beds in the Marcellus Shale of the Appalachian Basin
… the ash layers are suitable for SIMS U-Th-Pb geochronology due to their resistant behavior against weathering and ability to record age of the eruptions.;A total of 24 Tioga ash layers within cores of the Middle Devonian Marcellus and Onondaga from six wells located in West Virginia and …
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