Charreau, J., Saint-Carlier, D., Lavé, J. et al. (7 more authors) (2018) Late Pleistocene acceleration of deformation across the northern Tianshan piedmont (China) evidenced from the morpho-tectonic evolution of the Dushanzi anticline. Tectonophysics, 730. pp. 132-140. ISSN 0040-1951
Abstract
We document the temporal evolution of deformation in the northern Tianshan piedmont where the deformation is partitioned across several thrusts and folds. We focus on the Dushanzi anticline, where abandoned terraces and growth strata allow us to constrain the history of folding since the Miocene. Based on subsurface seismic imaging, structural measurements and morphological analysis, we show that this anticline is associated with two decollement levels. We use kink band migration in growth strata dated by paleomagnetism to constrain the shortening from the Mio-Pliocene to the Holocene. Our results show that the Dushanzi anticline has been active since at least 8 Ma and that the fold grew at a steady shortening rate of 0.6 ± 0.1 mm/yr from 8 to ~1.5 Ma with possible variations from 2.5 to 1.5 Ma. Then it accelerated rapidly to a rate of 4.3 ± 1.0 mm/yr over at least the last 100 ka. These results, together with similar temporal shortening evolutions across other structures, suggest that the deformation rate across the eastern Tianshan piedmont increased relatively recently. This may reflect either a redistribution of the deformation from the internal structures toward the borders or a general acceleration of the deformation across the entire range.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2018 Elsevier B.V. This is an author produced version of a paper subsequently published in Tectonophysics. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | Tectonic; Shortening rates; Dushanzi Kuitun; Tianshan; Alluvial terrace; Growth-strata; Piedmont |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > Department of Geography (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 25 May 2018 13:23 |
Last Modified: | 27 Feb 2019 01:39 |
Published Version: | https://doi.org/10.1016/j.tecto.2018.02.016 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.tecto.2018.02.016 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131078 |
Downloads
Filename: Charreau-et-al-2018-Tectonophysics-Tien-Shan-Folding-GOA.pdf
Licence: CC-BY-NC-ND 4.0
Filename: Online_repository_KTN_GOA.pdf
Licence: CC-BY-NC-ND 4.0