Generation of Structural Relief by Fault Propagation Folding, Tien Shan, Kyrgzstan
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Date
2013-10-10
Authors
Paulson, Kathryn
Journal Title
Journal ISSN
Volume Title
Publisher
University of Oregon
Abstract
The southern margin of the Kochkor Basin in the Kyrgyz Tien Shan is actively shortening. The South Kochkor Fault, a reverse fault that places Paleozoic granite on Neogene sediments, varies in displacement from 0-2 km while the structural relief across the basin margin is 4 km. North of the fault, a 2 km thick panel of steeply-dipping to overturned sediments exhibits flexural shearing. This steep section is bounded by limbs of gently-dipping beds to the north and south. Northward, Neogene section is thrust over late Quaternary deposits in two younger episodes of faulting: the Akchop Hills Fault and the Aigyrdzal Hills Fault. Through 1:25,000 scale mapping I have demonstrated that of structural relief in the area is shared by fault propagation folding and faulting on a steep, reverse fault that shallows into a detachment.
A complete geologic map of Kochkor, Kyrgyzstan is included with this thesis as a supplemental file.
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Keywords
Kochkor, Kyrgyzstan, Structure, Tien Shan