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Type: Journal article
Title: Thermochronological insights into the structural contact between the Tian Shan and Pamirs, Tajikistan
Author: Jepson, G.
Glorie, S.
Konopelko, D.
Gillespie, J.
Danisik, M.
Evans, N.
Mamadjanov, Y.
Collins, A.
Citation: Terra Nova, 2018; 30(2):95-104
Publisher: Blackwell Publishing
Issue Date: 2018
ISSN: 0954-4879
Statement of
Gilby Jepson, Stijn Glorie, Dmitry Konopelko, Jack Gillespie, Martin Danišík, Noreen J. Evans, Yunus Mamadjanov, Alan S. Collins
Abstract: Multi‐method thermochronology along the Vakhsh‐Surkhob fault zone reveals the thermotectonic history of the South Tian Shan–Pamirs boundary. Apatite U/Pb analyses yield a consistent age of 251 ± 2 Ma, corresponding to cooling below ~550–350°C, related to the final closure of the Palaeo‐Asian Ocean and contemporaneous magmatism in the South Tian Shan. Zircon (U–Th–Sm)/He ages constrain cooling below ~180°C to the end of the Triassic (~200 Ma), likely related either to deformation induced by the Qiangtang collision or to the closure of the Rushan Ocean. Apatite fission track thermochronology reveals two low‐temperature (<120°C) thermal events at ~25 Ma and ~10 Ma, which may be correlated with tectonic activity at the distant southern Eurasian margin. The late Miocene cooling is confirmed by apatite (U–Th–Sm)/He data and marks the onset of mountain building within the South Tian Shan that is ongoing today.
Rights: © 2017 John Wiley & Sons Ltd
RMID: 0030080273
DOI: 10.1111/ter.12313
Appears in Collections:Physics publications

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