Carbon and Oxygen Isotope Changes and Palaeoclimate Cycles Recorded by Lacustrine Deposits of Miocene Wudaoliang Group in Northern Tibetan Plateau <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Carbon and Oxygen Isotope Changes and Palaeoclimate Cycles Recorded by Lacustrine Deposits of Miocene Wudaoliang Group in Northern Tibetan Plateau oft-com:office:office" />

详细信息

责任者：Wu Zhenhan (Institute of Geomechanics ; CAGS ; Beijing 100081 ; China) ; Wu Zhonghai
刊名：Geology in China
出版年：2009
卷期：36(5)
关键词：中新世 ; Miocene ; 湖泊沉积物 ; lake sediments ; 古气候 ; paleoclimate ; 青藏高原 ; Qinghai-Tibetan Plateau
页码：p.966-975
图表：4 illus., 4 tables, 13 refs.
分类号：1400
issnNo：ISSN1000-3657
isbnNo：CN11-1167/P

摘要

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Carbon and oxygen isotopes in drill core of Wudaoliang Group have well recorded Early Miocene environment changes and palaeoclimate cycles in northern Tibetan Plateau. The Wudaoliang Group as thick as ～ oft-com:office:smarttags" />150 m consists mainly of limestone, dolomite limestone and marl, with a discontinuity occurring at the depth of 50.0～51.0 m in the drill core. Carbon and oxygen isotopes change considerably at the depth of 140～145 m, where both maximal δ¹⁸O and minimal δ¹³C occur two times. δ¹⁸O and δ¹³C reach to the minimum at the depth of 140.7 m, corresponding to global cooling Mi-1 recorded by the deep-sea drilling of oceanic deposits at the Miocene/Oligocene boundary.

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