PUBLICATIONS Tectonics RESEARCH ARTICLE Pliocene-Pleistocene initiation, style, 10.1002/2013TC003394 and sequencing of deformation Key Points: in the central Tien Shan • Dates of folded terraces constrain structure timing Joseph K. Goode1, Douglas W. Burbank1, and Cholponbek Ormukov2 • Geologic and geodetic deformation rates are consistent 1Department of Earth Science, University of California, Santa Barbara, California, USA, 2Central-Asian Institute for Applied • Naryn basin structures originated about 1 Ma Geoscience, Bishkek, Kyrgyzstan Abstract In response to the Indo-Asian collision, deformation of the Tien Shan initiated at ~25 Ma along Correspondence to: the northwestern margin of the Tarim Basin. 300 km north, the Kyrgyz Range began deforming ~15 Ma later. J. K. Goode, Although multiple intervening structures across the Tien Shan are currently active, the sequencing of initial
[email protected] deformation across the orogen’s entire width remains poorly known. To determine whether deformation migrated sequentially northward or developed less predictably, we documented deformation patterns Citation: within the Naryn Basin in south-central Kyrgyzstan. Detailed mapping and a published balanced cross section Goode, J. K., D. W. Burbank, and C. Ormukov (2014), Pliocene-Pleistocene across the Naryn Basin suggest that deep-seated, relatively steeply dipping thrust faults have disrupted the initiation, style, and sequencing of defor- basin during late Cenozoic deformation. Dating of deformed fluvial terraces with ages between ~10 and 250 ka mation in the central Tien Shan, Tectonics, constrains the rate of deformation across relatively young structures in the Tien Shan interior. Based on geodetic 33, 464-484, doi:10.1002/2013TC003394. surveys of dated terraces, local rates of relative rock uplift span from 0.3 to 3.5 mm/yr.