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Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau

LIU Zhifei WANG Chengshan Alain TRENTESAUX ZHAO Xixi YI Haisheng HU Xiumian JIN Wei

地质学报（英文版）2003，Vol.77Issue(4)：504-513,10.
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地质学报（英文版）2003，Vol.77Issue(4)：504-513,10.

Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau

Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau

LIU Zhifei 1WANG Chengshan 2Alain TRENTESAUX 3ZHAO Xixi 4YI Haisheng 2HU Xiumian 2JIN Wei2

作者信息

  • 1. Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
  • 2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • 3. UMR PBDS du CNRS, Universite des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq, France
  • 4. Center for Study oflmaging and Dynamics of the Earth, Institute of Geophysics and Planetary Physics, University of California, Santa Cruz, CA 95064, USA
  • 折叠

摘要

Abstract

Sedimentological, cyclic-stratigraphic, paleomagnetic, and clay-mineralogical studies on the earlyOligocene Yaxicuo Group in the Hoh Xil Basin, the largest Cenozoic sedimentary basin in the hinterland of the TibetanPlateau, provide abundant information of paleoclimate changes. A 350-m thick section in the middle-lower YaxicuoGroup was analyzed to reveal the climatic history that occurred in the Hoh Xil region during the early Oligocene interval31.30-30.35 Ma, dated with the paleomagnetic chronostratigraphy. The results indicate that arid and cold climatedominated the Hoh Xil region during the early Oligocene in general, being related to the global cooling and dryingevents that occurred in the earliest Oligocene. Within this period, relatively warm and wet climate accompanied bystrong tectonic activity occurred in the 31.05-30.75 Ma interval; while arid and cold climate and relatively inactivetectonics occurred in the 31.30-31.05 and 30.75-30.35 Ma intervals. Furthermore, spectral analyses of high-temporalresolution paleoclimatic records show orbital periods including eccentricity, obliquity, and precession. It is concludedthat paleoclimate changes during the early Oligocene in the Hoh Xil region were forced by both tectonic activity andorbital periods.

关键词

climate changes/early Oligocene/Hoh Xil Basin/Tibetan Plateau/tectonic forcing/astronomical periods

Key words

climate changes/early Oligocene/Hoh Xil Basin/Tibetan Plateau/tectonic forcing/astronomical periods

分类

天文与地球科学

引用本文复制引用

LIU Zhifei,WANG Chengshan,Alain TRENTESAUX,ZHAO Xixi,YI Haisheng,HU Xiumian,JIN Wei..Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau[J].地质学报（英文版）,2003,77(4):504-513,10.

基金项目

This study was supported by the National Natural Science Foundation of China (grants 40102010 and 40202022), the National Key Basic Research Special Foundation Project of China (grant G1998040800) and the Shanghai Rising-Star Program (grant 03QE 14051). （grants 40102010 and 40202022）

地质学报（英文版）

1000-9515

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