首页|Pre-Cryogenian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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

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The composition and geological evolution of pre-Cryogenian material in the Tibetan Plateau and its surrounding areas have played an important role in studying the formation and evolution of early supercontinents on Earth.This paper systematically summarizes the characteristics of pre-Cryogenian sedimentation,paleontology,magmatism,and metamorphism in the Tibetan Plateau and its surrounding areas.Based on existing data,the records of pre-Cryogenian sedimentation and paleontology are mainly concentrated in the Meso-Neoproterozoic,with relatively few records from the Paleoproterozoic or earlier.The oldest geological record is the Hadean detrital zircons in the metamorphosed sedimentary rocks of the Himalaya and Qamdo areas(ca.4.0 Ga).The Tibetan Plateau and surrounding areas preserve records related to the formation and evolution of the Kenor supercraton,and the Columbia,Rodinia,and Gondwana supercontinents.Pre-Cryogenian basements can be divided into three types:Tarim-,Yangtze-,and Lhasa-type.The Tarim-type basement has a paleogeographic affinity with the northern margins of the Australian and Indian continents and lacks detrital zircon age peaks and magmatic-metamorphic records related to the Rodinia assembly(ca.1.3-0.9 Ga).The Yangtze-type basement records volcanic activity related to global cooling in the latest pre-Cryogenian period and contains Meso-Neoproterozoic stromatolite and micropaleoflora fossils,as well as magmatic-metamorphic records related to Rodinia assembly(ca.1.1-1.0 Ga).The Lhasa-type basement is characterized by Neoproterozoic rift-related sediment records(ca.900 Ma)and high-pressure metamorphic events(ca.650 Ma),with a prominent peak of detrital zircon ages of ca.1.2-1.1 Ga.It is likely to have a paleogeographic affinity with the African continent.

Tibetan PlateauPre-CryogenianSedimentationFossilsPaleogeographic evolution

Peiyuan HU、Qingguo ZHAI、Guochun ZHAO、Peter A.CAWOOD、Yue TANG、Yiming LIU

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Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China

Department of Earth Sciences,University of Hong Kong,Pokfulam Road,Hong Kong 999077,China

State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi,an 710069,China

School of Earth,Atmosphere & Environment,Monash University,Melbourne,VIC 3800,Australia

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Chinese Geological Survey Project国家重点研发计划Second Tibetan Plateau Scientific Expedition and Research(STEP)国家自然科学基金国家自然科学基金Chinese Academy of Geological SciencesAustralian Research

DD202216302021YFC29019012019QZKK07034207226841872240J2202FL160100168

2024

10.1007/s11430-022-1127-8

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)
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