A potentially New Early Ediacaran Glaciation  

作　　者：Zhongwu Lan Magdalena H.Huyskens Rong Ren Qing-Zhu Yin 

机构地区：[1]State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China [2]Department of Earth and Planetary Sciences,University of California,Davis,CA,USA [3]State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing,210008,China [4]Research Institute of Petroleum Exploration and Development,PetroChina,Beijing,100083,China

出　　处：《Journal of Earth Science》2024年第6期1810-1819,共10页地球科学学刊（英文版）

基　　金：supported by the Strategy Priority Research Program(Category B)of Chinese Academy of Sciences(No.XDB0710000);the National Science Foundation of China(No.42273025);the State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences(No.SKL-Z202001);the State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences(No.223115);PetroChina(No.2023ZZ0202)。

摘　　要：Multiple episodes of Neoproterozoic glaciation,namely the Beiyixi,Altungol,Tereeken and Hankalchough glaciations,are recorded in the Kuruktag area of northeastern Tarim Craton,NW China.The Tereeken glaciation was previously correlated with the global Marinoan glaciation based on sedimentary and chemostratigraphic features recorded in the cap dolostone immediately overlying the glaciogenic diamictite,as well as less precise radiometric age constraints.In this study,we obtained chemical-abrasion isotope dilution isotope ratio mass spectrometry(CA-ID-IRMS)U-Pb age of 624.03±0.10 Ma from zircons extracted from a tuff lava interbeded within the diamictite of the Tereeken Formation,which suggests an Early Ediacaran age for the Tereeken glaciation.Such newly discovered Early Ediacaran glaciation in the Tarim region could have induced the negativeδ^(13)C_(carb)excursions of 625-605 Ma by providing oxygen and other oxidants to invoke remineralization of a deep ocean dissolved organic carbon(DOC)reservoir.

关 键 词：Kuruktag Tereeken glaciation ZIRCON CA-ID-IRMS U-Pb age EDIACARAN 

分 类 号：P343.6[天文地球—水文科学] P597.3[天文地球—地球物理学] P534.3