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The Petrography of the Buck Creek Dunite Body, Clay County, NC : Implications about its Origin and Emplacement

Thornberry, Trista L
http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411990381

Abstract Details

1998, BA, Oberlin College, Geology.
The Buck Creek dunite body, which is part of the Chunky Gal mafic and ultramafic complex, is well exposed on Corundum Knob in Clay County, North Carolina. These ultramafic rocks are surrounded here by mafic schists and gneisses. Gradational geochemical/mineralogical contacts between the mafic and ultramafic rocks of this complex imply the same protolith for both rock types. They may have originated as distinct parts of an ophiolitic suite beneath a mid-ocean spreading ridge. The metamorphic history of these ophiolitic rocks suggest further that they were subducted to depths of ~18km before being emplaced along fault zones in the present day Blue Ridge Province. Buck Creek dunites are generally unserpentinized, and display microstructures and crystallographic preferred orientations indicative of a simple shear deformation via dislocation creep. The degree of recrystallization in deformed olivines here implies elevated temperature/pressure conditions such as those found in collisional events. The large size of recrystallized grains and the apparently low dislocation densities in olivine indicates low differential stresses, also consistent with high temperature crustal deformation.
Steven Wojtal (Advisor)
72 p.
Geology
Buck Creek; dunite; North Carolina; olivines; crust;

Recommended Citations

Citations

  • Thornberry, T. L. (1998). The Petrography of the Buck Creek Dunite Body, Clay County, NC : Implications about its Origin and Emplacement [Undergraduate thesis, Oberlin College]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411990381

    APA Style (7th edition)

  • Thornberry, Trista. The Petrography of the Buck Creek Dunite Body, Clay County, NC : Implications about its Origin and Emplacement. 1998. Oberlin College, Undergraduate thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411990381.

    MLA Style (8th edition)

  • Thornberry, Trista. "The Petrography of the Buck Creek Dunite Body, Clay County, NC : Implications about its Origin and Emplacement." Undergraduate thesis, Oberlin College, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1411990381

    Chicago Manual of Style (17th edition)

oberlin1411990381
217
© 1998, all rights reserved.
This open access ETD is published by Oberlin College Honors Theses and OhioLINK.
Release 3.2.12