Cretaceous integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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外文摘要：The Cretaceous Period is a vital time interval in deciphering the evolutionary history of the Neo-Tethys Ocean and the convergence of different plates and blocks across the Qinghai-Tibetan Plateau.A detailed stratigraphic framework and paleo-geographic patterns are the basis for understanding the evolution of the Neo-Tethys Ocean and the formation of the Qinghai-Tibetan Plateau.Here,the Cretaceous stratigraphy,biota,paleogeography,and major geological events in the Qinghai-Tibetan Plateau are analyzed to establish an integrative stratigraphic framework,reconstruct the paleogeography during the Cretaceous Period,and decode the history of the major geological events.The Cretaceous rocks of the Qinghai-Tibetan Plateau and its surrounding area are predominantly marine deposits,with a small amount of interbedded marine-terrestrial and terrestrial conponents.The Indus-Yarlung Tsangpo Suture Zone was responsible for the deposition of deep marine sediments dominated by ophiolite suites and radiolarian silicalite.To the south,the Tethys Himalayas and Indus Basin received marine sediments of varying depths and lithology;to the north,the Xigaze and Ladakh forearc basins are also filled with marine sediments.The Lhasa Block,Karakorum Block,western Tarim Basin,and West Burma block consist of shallow marine,interbedded marine-terrestrial,and terrestrial sediments.The Qiangtang Basin and other areas are dominated by terrestrial sedimentation.The Cretaceous strata of the Qinghai-Tibetan Plateau and its surrounding areas are widely distributed and diversified,with abundant foraminifera,calcareous nannofossils,radiolarians,ammonites,bivalves,and palynomorphs.On the basis of integrated lithostratigraphic,biostratigraphic,geochronologic,and chemostratigraphic analyses,we proposed herein a comprehensive stratigraphic frame-work for the Cretaceous Period of the eastern Neo-Tethys.By analyzing the Cretaceous biota of different biogeographic zones from eastern Neo-Tethys and its surrounding areas,we reconstructed the paleobiogeography of different periods of eastern Neo-Tethys.The Cretaceous paleogeographic evolution of the Qinghai-Tibetan Plateau and its surrounding areas can be divided into three phases:(1)gradual breakup of the Indian Plate from the Australia-Antarctica continent and the early collision phase of the Lhasa-Qiangtang blocks(145-125 Ma);(2)northward drift of the Indian Plate and the collision phase of the Lhasa-Qiangtang blocks(125-100 Ma);(3)rapid northward drift of the Indian Plate,formation of the Tarim-Tajik-Karakorum Bay,and early uplift of the Gangdise Mountains(100-66 Ma).The Indus-Tethys Himalayan biota underwent a transition from the cold-water type in the high latitudes of the southern hemisphere to the warm-water type near the equator from the Early Cretaceous to the Mid-Cretaceous.The biodiversity and abundance of the eastern Neo-Tethys Ocean increased gradually in the Early Cretaceous,peaking in the Mid-Cretaceous,and decreased sharply during the late Late Cretaceous(late Maastrichtian).Along with the northward drift of the Indian Plate and subduction of the Neo-Tethys,the eastern Neo-Tethys and its surrounding areas experienced a series of major geological events,including the formation of the large igneous province,oceanic anoxia events,and mass extinction,etc.

外文关键词：

Qinghai-Tibetan PlateauTethysCretaceousStratigraphyBiotaPaleogeography

作者：

Dangpeng XI、Guobiao LI、Shijun JIANG、Xin RAO、Tian JIANG、Tianyang WANG、Zuohuan QIN、Yasu WANG、Jianzhong JIA、Muhammad KAMRAN、Zhongye SHI、Yuyang WU、Panxi WANG、Lixin SUN、Qinggao ZENG、Xiaoqiao WAN

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作者单位：

State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Beijing 100083,China

College of Oceanography,Hohai University,Nanjing 213200,China

Key Laboratory of Palaeobiology and Petroleum Stratigraphy,Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences,Nanjing 210008,China

State Key Laboratory of Tibetan Plateau Earth System,Environment,and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

China National Offshore Oil Corporation Limited,Beijing 100028,China

Shanghai Science and Technology Museum,Shanghai 200120,China

Xizang Bureau of Geological and Mineral Exploration and Development,Lhasa 850000,China

Tianjin Geological Survey Center of China Geological Survey,Tianjin 300170,China

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基金：

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Second Qinghai-Tibetan Plateau Scientific Expedition111 Introduction ProgramInternational Geological Comparison Program

项目编号：

2022YFF08008002422720354228820142072001422720272019QZKK0706B20011IGCP679

出版年：

2024

DOI：

10.1007/s11430-023-1303-2

中国科学:地球科学(英文版)

中国科学院

中国科学:地球科学(英文版)

影响因子：1.002

ISSN：1674-7313

年,卷(期)：2024.67(4)

参考文献量472