New sedimentological and palynological data from the Yarkand-Fergana Basin (Kyrgyz Tian Shan): Insights on its Mesozoic paleogeographic and tectonic evolution

نویسندگان

چکیده

The Talas Fergana/Karatau Fault, is a major tectonic boundary separating the Kazakh-Turan domain to west from Tian Shan east. During Jurassic, movements along fault led opening of several basins. Still, Mesozoic kinematics and geodynamic mechanism that these basins are largely unconstrained. Located at its southwestern termination, Yarkand-Fergana Basin certainly best exposed however still poorly understood. In this study, we provide new sedimentological description Jurassic series northern part as well palynological data. Following Middle–Late Triassic period dominated by regional erosion, onset sedimentation in occurred during Sinemurian(?)–Pliensbachian. basin opened half graben controlled Fault separated Fergana basement highs. Extension persisted late Pliensbachian–Middle leading general widening Basin. Finally, Late Jurassic–Early Cretaceous renewed activity area inversion north Early Middle timing development suggests coeval not associated collision Qiangtang block southern margin Eurasia. We favor hypothesis an transtension related far field effects back-arc extension Neo-Tethys subduction zone west.

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ژورنال

عنوان ژورنال: Geoscience frontiers

سال: 2021

ISSN: ['2588-9192', '1674-9871']

DOI: https://doi.org/10.1016/j.gsf.2020.04.010