T244 Integrated Tectono-Sedimentary Records in the Tibetan Plateau and Adjacent Areas

Wednesday, 25 September 2019
8:00 AM - 12:00 PM
Room 231ABC, North Building

INTEGRATING IMMEDIATE FAR-FIELD RESPONSE AND PROGRESSIVE NORTHEASTWARD GROWTH OF THE TIBETAN PLATEAU: INSIGHTS FROM CENOZOIC SEDIMENTARY RECORDS IN JIUXI BASIN AT THE NE PLATEAU MARGIN

Paper number: T244-11
Program: Technical Sessions
Time: 10:40 AM – 10:55 AM

Authors

  • Xiubin Lin Presenting Author
    Zhejaing University, Hangzhou

Abstract

The Indo-Asian collision has created the >2000 km wide Tibetan Plateau. Opinions towards when the convergence-induced deformation arrived in the NE plateau margin fall into two contrasting models, immediate far-field response or progressive northeastward growth. In this study, we analyzed the Cenozoic strata and recognized a reorganization of sediment dispersal in Jiuxi Basin at ~17 Ma, before and after which the basin received sediments from the north and south source regions, respectively. Independent apatite fission-track analyses in the north source regions (Kuantan Shan-Hei Shan) revealed a rapid exhumation stage during the Paleogene. These results, combined other findings in the northeast Tibetan Plateau, indicate an integrating growth pattern combining an initial stage of immediate far-field response along inherited lithospheric weak zones followed by a later period of progressive northeastward plateau growth.

Geological Society of America Abstracts with Programs. Vol. 51, No. 5

doi: 10.1130/abs/2019AM-335008

© Copyright 2019 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.