Mesozoic–Cenozoic multistage tectonic evolution of the Pamir:detrital fission-track constraints from the Tajik Basin Journal Title: Basin Research

Li, Lin and Najman, Yani and Dupont‐Nivet, Guillaume and Parra, Mauricio and Roperch, P. and Kaya, Mustafa and Meijer, N. and O'Sullivan, Paul and Jepson, Gilby and Aminov, Jovid (2022) Mesozoic–Cenozoic multistage tectonic evolution of the Pamir:detrital fission-track constraints from the Tajik Basin Journal Title: Basin Research. Basin Research. ISSN 0950-091X (In Press)

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Abstract

Knowledge of the tectonic history of the Pamir contributes to our understanding of both the evolution of collisional orogenic belts as well as factors controlling Central Asian aridification. It is, however, not easy to decipher the Mesozoic–Cenozoic tectonics of the Pamir due to extensive Neogene deformation in an orogen that remains largely understudied. This study reports detrital apatite and zircon fission-track (FT) ages from both the eastern Tajik Basin sedimentary rocks and Pamir modern river sands. These FT data, supported by vitrinite reflectance and zircon and apatite U-Pb double dating, suggest that the majority of the FT ages are unreset and record exhumation stages of the Pamir, which has served as the source terrane of the Tajik Basin since the Cretaceous. Further, we combine the new data with a compilation of published detrital apatite and zircon FT data from both the Tajik Basin sedimentary rocks and Pamir modern river sands, to explore the Mesozoic–Cenozoic tectonic history of Pamir. Deconvolved FT Peak Ages document two major Mesozoic exhumation events associated with the Late Triassic–Early Jurassic Cimmerian orogeny that reflects accretion of the Pamir terranes, as well as the Early–early Late Cretaceous deformation associated with the northward subduction of the Neo-Tethys Ocean beneath Pamir. The compiled data also show significant Late Eocene–Neogene exhumation associated with the ongoing formation of the Pamir, which peaks at ~36 Ma, ~25 Ma, ~14 Ma, and ~7 Ma.

Item Type:
Journal Article
Journal or Publication Title:
Basin Research
Additional Information:
This is the peer reviewed version of the following article:Li, L., Najman, Y., Dupont-Nivet, G., Parra, M., Roperch, P., Kaya, M., Meijer, N., O’Sullivan, P., Jepson, G. and Aminov, J. (2022), Mesozoic–Cenozoic multistage tectonic evolution of the Pamir: detrital fission-track constraints from the Tajik Basin. Basin Res. Accepted Author Manuscript. https://doi.org/10.1111/bre.12721 which has been published in final form at https://onlinelibrary.wiley.com/doi/10.1111/bre.12721 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1907
Subjects:
ID Code:
177392
Deposited By:
Deposited On:
11 Oct 2022 08:35
Refereed?:
Yes
Published?:
In Press
Last Modified:
22 Nov 2022 11:56