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" Deformation Microstructures, Mechanisms, and History of a Shear Zone Within the Chugach Accretionary Complex in the Nelchina Area, South-Central Alaska "
Yakimova, Veselina T.
Nadin, Elisabeth
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Latin Dissertation
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| Language of Document
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English
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| Record Number
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1114197
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| Doc. No
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TLpq2404594017
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| Main Entry
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Nadin, Elisabeth
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Yakimova, Veselina T.
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| Title & Author
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Deformation Microstructures, Mechanisms, and History of a Shear Zone Within the Chugach Accretionary Complex in the Nelchina Area, South-Central Alaska\ Yakimova, Veselina T.Nadin, Elisabeth
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| College
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University of Alaska Fairbanks
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| Date
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2020
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| student score
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2020
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| Degree
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M.S.
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| Page No
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104
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| Abstract
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Ductile-to-brittle fault zones reveal mineralogical processes that are thought to be responsible for the mechanical behavior of faults. I examined a pervasively deformed zone within the Jurassic to Cretaceous accretionary complex of southern Alaska that preserves hydrothermal alteration, dissolution precipitation, carbonaceous material (CM), clay minerals, and intracrystalline plasticity, all of which influence the strength of a fault. I characterized microstructures by SEM and EBSD, determined compositions by XRD, XRF, and Raman spectroscopy for one carbon-rich sample, and dated whole rock, rotated K-feldspar, and metamorphic muscovite by 40Ar/39Ar thermochronology to constrain the timing and conditions of accretion, uplift, and deformation recorded by this fault zone.
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| Subject
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Geology
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