Geochemical characteristics and provenance analysis of Lower Jurassic Badaowan Formation in Changji area of Xinjiang,China

作     者：LIU Zhanjin XIA Zhaode LIU Yunhua DU Jinhua WANG Shuo ZHANG Yunfei GAO Jinghui LIU Zhanjin;XIA Zhaode;LIU Yunhua;DU Jinhua;WANG Shuo;ZHANG Yunfei;GAO Jinghui

作者机构：College of Earth Sciences and ResourcesChang’an UniversityXi’an 710054China PetroChina Changqing Oilfield South Sulige Operating CompanyXi'an 710018China Sino Shaanxi Nuclear Industry Group 214 Brigade Co.LtdXi’an 710054China 

出 版 物：《Global Geology》 (世界地质（英文版）)

年 卷 期：2023年第26卷第2期

页      面：74-97页

学科分类：070902[理学-地球化学] 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] 

基　　金：Supported by Geological Survey Project of China(No.K45E001012 2019–002) 

主　　题：Junggar Basin Badaowan Fm. geochemistry zircon U-Pb age provenance tectonic setting 

摘      要：Based on the field survey of Lower Jurassic Badaowan Formation(Fm.)in Changji area of Xinjiang,China,the authors studied the sedimentary environment and provenance characteristics using the analyses of stratigraphic profiles,sedimentary structures,petrography,zircon U-Pb chronology and *** results show that Badaowan *** in fluvial to swamp shallow-deeplacustrine sedimentary facies *** of Sr and ratios of Sr/Cu,Sr/Ba,Th/U,SiO_(2)/Al_(2)O_(3),V/(V+Ni),V/Cr,and Cu/Zn together indicate that Badaowan *** deposited in an oxygen-poor transitional freshwater environment,under humid climatic *** characteristics and Q–F–L,Qm–E–Lt,Th–Co–Zr/10,La–Th–Sc,and Th–Sc–Zr/10 discrimination diagrams indicate that the tectonic setting of the source area was a continental island arc *** composition,Th/U ratios,and Co/Th–La/Sc,La/Th–Hf,and La/Yb–REE discrimination diagrams show that the source rocks of Badaowan *** upper-crust felsic volcanic rocks.U-Pb dating of detrital zircons yields ages of 1542.3±15.0 to 232.9±3.3 Ma and mostly in the ranges of 470–410 and 370–280 Ma.A comparison of these ages with the age data from different blocks of crystalline rock in Tianshan Mountains area reveals that the sedimentary rocks in the Badaowan *** sourced predominantly from the central and subordinately from the southern Tianshan Mountains during Early Jurassic.