Early Triassic Legoupil Formation in Schmidt Peninsula,Antarctic Peninsula:Provenance and Depositional Settings

作     者：Chao Zhang Ying-Chun Cui Chen-Guang Liu Fang-Hua Cui Lu-Yuan Wang Wei-Qiang Zhang Chao Zhang;Ying-Chun Cui;Chen-Guang Liu;Fang-Hua Cui;Lu-Yuan Wang;Wei-Qiang Zhang

作者机构：School of Resources and Environmental EngineeringShandong University of TechnologyZibo255049China MNR Key Laboratory for Polar SciencePolar Research Institute of ChinaShanghai201209China Key Laboratory of Marine Sedimentology and Environmental GeologyFirst Institute of OceanographyState Oceanic AdministrationQingdao266061China Laboratory for Marine GeologyQingdao National Laboratory for Marine Science and TechnologyQingdao266061China Key Laboratory of Mineral Resources Evaluation in Northeast AsiaMinistry of Land and ResourcesChangchun130061China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2024年第35卷第2期

页      面：317-331页

核心收录：

学科分类：070904[理学-构造地质学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 

基　　金：financially co-supported by the National Natural Science Foundation of China(Nos.41530209,41802238) the Chinese Polar Environment Comprehensive Investigation&Assessment Programs(Nos.CHINARE 2015-02-05,CHINARE 2017-04-03) the Young Scientists Fund of Shandong Province(No.ZR2019PD010) the Opening Foundation of Key Laboratory of Mineral Resources Evaluation in Northeast Asia,Ministry of Land and Resources(No.DBY-KF-19-15). 

主　　题：Schmidt Peninsula Legoupil Formation Trinity Peninsula Group detrital zircons Antarctic Peninsula geochemistry 

摘      要：Geochemical compositions can be used to determine the tectonic setting of sedimentary basins,while where the link of source to sink is no longer preserved,detrital zircon age patterns can aid in resolving the original basin setting.The metasedimentary Legoupil Formation,located at Cape Legoupil and the Schmidt Peninsula,could give a hint for the tectonic evolution of Antarctic Peninsula.In this contribution,we constrain the sedimentary provenance of the Legoupil Formation through geochemistry and detrital zircon U-Pb geochronology.The petrography and geochemical features indicate that the provenance of the Legoupil Formation could be felsic rocks.Detrital zircon grains record a steady supply of Permian and Ordovician material into the Legoupil Formation.The youngest concordant zircon ages of 262 Ma suggest that the depositional time of Legoupil Formation is no older than Late Permian.The detrital zircon age spectrum of Legoupil Formation suggests that the Legoupil Formation sediments should be derived from regional sources endemic to western Gondwana prior to its breakup.Together with the previous studies,geochemistry and detrital zircons reflect an active continental margin tectonic setting and the detrital zircon spectra of Legoupil Formation are similar to the ones deposited in forearc tectonic setting.