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Decoding Provenance and Tectonothermal Events by detrital zircon Fission-Track and U-Pb double dating: A Case of the Southern Ordos Basin

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 845-856页

作者： ZHANG Shaohua LIU Chiyang YANG Minghui WANG Jianqiang BAI Jianke Huang Hexin State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069ShaanxiChina State Key Laboratory of Petroleum Resource and Prospecting College of GeosciencesChina University of PetroleumBeijing 102200China Research Center of Orogenic Geology Xi'an Center of Geological SurveyChina Geological SurveyXi'an 710054ShaanxiChina

Multi-dating on the same detrital grains allows for determining multiple different geo-thermochronological ages simultaneously and thus could provide more details about regional *** this paper,we carried out detrital zircon fission-track and U-Pb double dating on the Permian-Middle Triassic sediments from the southern Ordos Basin to decipher the tectonic information archived in the sediments of intracratonic *** detrital zircon U-Pb ages and fission-track ages,together with lag time analyses,indicate that the Permian-Middle Triassic sediments in the southern Ordos Basin are characterized by multiple *** crystalline basement of the North China Craton(NCC)and recycled materials from pre-Permian sediments that were ultimately sourced from the basement of the NCC are the primary provenance,while the Permian magmatites in the northern margin of NCC and Early Paleozoic crystalline rocks in Qinling Orogenic Collage act as minor *** addition,the detrital zircon fission-track age peaks reveal four major tectonothermal events,including the Late Triassic-Early Jurassic post-depositional tectonothermal event and three other tectonothermal events associated with source *** Late Triassic-Early Jurassic(225–179 Ma)tectonothermal event was closely related to the upwelling of deep material and energy beneath the southwestern Ordos Basin due to the coeval northward subduction of the Yangze Block and the following collision of the Yangze Block and the *** Mid-Late Permian(275–263 Ma)tectonothermal event was associated with coeval denudation in the northern part of the NCC and North Qinling terrane,resulting from the subduction of the Paleo-Asian Ocean and Tethys Ocean toward the *** Late Devonian-early Late Carboniferous(348±33 Ma)tectonothermal event corresponded the long-term denudation in the hinterland and periphery of the NCC because of the arc-continent collisions in the northern and southern margins of the *** Late Neop

关键词： provenance multiple tectonothermal events detrital zircon double dating Ordos Basin North China Craton

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