Magnetostratigraphy of Cenozoic deposits in the western Qaidam Basin and its implication for the surface uplift of the northeastern margin of the Tibetan Plateau
Magnetostratigraphy of Cenozoic deposits in the western Qaidam Basin and its implication for the surface uplift of the northeastern margin of the Tibetan Plateau
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DOI：
10.1016/j.epsl.2015.08.029
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发表时间：
2015-11-15
影响因子：
5.3
通讯作者：
An, Zhisheng
中科院分区：
文献类型：
--
作者：
Chang, Hong;Li, Leyi;An, Zhisheng
柴达木盆地西北部的新生代厚层沉积记录了阿尔金和盆地西部高地的侵蚀，推测是青藏高原东北部同时生长的结果。对柴达木盆地西北部花土沟剖面的磁性地层学研究表明，该剖面的磁性地层时代为30 ~ 11 Ma。磁性地层学和沉积学研究表明，聚集速率在15 Ma附近突然增加。沉积速率的加快表明柴达木盆地自15 Ma以来构造变形的增强可能与阿尔金断裂、昆仑断裂和海原断裂的加速变形沿着同时开始，这对柴达木盆地及其周边地区自15 Ma以来的生长历史作出了贡献。(C)2015 Elsevier B. V.版权所有。
Thick Cenozoic deposits in the northwestern Qaidam Basin record erosion of the Altyn Tagh and high terrain west of that basin and presumably the concurrent growth of the northeastern Tibetan Plateau. A detailed magnetostratigraphic study of the Huatugou section, northwestern Qaidam basin, reveals that this section spans the period from similar to 30 to similar to 11 Ma. Magnetostratigraphic and sedimentological studies indicate that the accumulation rate abruptly increased near similar to 15 Ma. The acceleration in sedimentation rate suggests enhanced tectonic deformation in the Qaidam basin since similar to 15 Ma that may have begun simultaneously with accelerated deformation along the Altyn Tagh, Kunlun, and Haiyuan faults, which contributed to the growth history of the Qaidam basin and its surroundings since similar to 15 Ma. (C) 2015 Elsevier B.V. All rights reserved.