Kinematics and timing of the Gold Hill fault zone in the vicinity of High Rock Lake, south-central North Carolina

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dc.contributor.advisor Dr. James P. Hibbard, Committee Chair en_US
dc.contributor.author Standard, Issac Daniel en_US
dc.date.accessioned 2010-04-02T18:06:11Z
dc.date.available 2010-04-02T18:06:11Z
dc.date.issued 2003-05-14 en_US
dc.identifier.other etd-05132003-170926 en_US
dc.identifier.uri http://www.lib.ncsu.edu/resolver/1840.16/1677
dc.description.abstract The Gold Hill fault zone is a first-order structure in the Carolina Zone of the southern Appalachians that separates medium grade ductiley deformed rocks of the Charlotte terrane from low grade, mildly deformed rocks of the Carolina terrane. Based on circumstantial evidence, the Gold Hill fault zone has traditionally been viewed as a Devonian dextral shear zone. However, at the western boundary of the Carolina terrane, Late Ordovician, northeast trending, en echelon regional folds are truncated by the north-northeast-trending Gold Hill fault zone. The orientation of these folds relative to the trace of the Gold Hill fault zone suggests previously undocumented early sinistral shear along this major structure. In this vein, new work involving structural mapping and modern kinematic analysis has been undertaken near High Rock Lake, North Carolina in order to investigate the early history of the Gold Hill fault zone. At the western boundary of the Carolina terrane in the vicinity of High Rock Lake, lower to middle greenschist facies rocks of the Albemarle Group are folded about the southwest plunging axis of the Silver Valley syncline and imprinted by a steep northeast-striking axial planar cleavage. In this area, the Gold Hill fault truncates structures associated with the Silver Valley syncline and separates two distinct structural domains. The southwestern domain is characterized by lower to middle greenschist facies unseparated Albemarle Group units deformed by upright, southwest-trending, outcrop-scale folds that contain a steep, north-northeast to northeast striking axial planar cleavage. The folds and cleavage in this domain are similar in geometry and style to the Silver Valley syncline and are interpreted to be genetically related to regional folds in the Carolina terrane. The northwestern domain consists of upper greenschist facies phyllitic volcaniclastic rocks of the western belt. Foliation surfaces in this domain, which strike north-northeast and dip steeply, contain a consistent sub-vertical stretching lineation, as well as a heterogeneously distributed sub-horizontal stretching lineation. Kinematic indicators suggest that motion on the Gold Hill fault zone involved thrusting of the western belt (hanging wall) over the Carolina terrane (foot wall) coupled with a component of sinistral strike-slip motion. These new structural and kinematic relationships suggest Late Ordovician or younger sinistral transpression that may be related to the accretion of the Carolina Zone to Laurentia. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject southern Appalachians en_US
dc.subject Carolina terrane en_US
dc.subject Carolina Zone en_US
dc.subject transpression en_US
dc.subject sinistral en_US
dc.subject Silver Hill en_US
dc.subject Gold Hill shear zone en_US
dc.title Kinematics and timing of the Gold Hill fault zone in the vicinity of High Rock Lake, south-central North Carolina en_US
dc.degree.name MS en_US
dc.degree.level thesis en_US
dc.degree.discipline Marine, Earth and Atmospheric Sciences en_US


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