Early Paleozoic Tectonic Evolution of the Chinese Southwest Tianshan Orogen:Implications from Detrital Zircon U-Pb Geochronology of the Biedieli Sedimentary Rocks,Northern Wushi Area,NW China  

作　　者：HUO Hailong CHEN Zhengle ZHANG Qing HAN Fengbin ZHANG Wengao WANG Yong WANG Wenbao 

机构地区：[1]Laboratory of Dynamic Diagenesis and Metallogenesis,Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China [2]Key Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Natural Resources,Beijing 100081,China [3]SinoProbe Laboratory,Chinese Academy of Geological Sciences,Beijing 100094,China [4]Xinjiang Research Center for Mineral Resources,Urumqi 830011,China [5]Hohhot Natural Resources Comprehensive Survey Center,Hohhot 010020,China

出　　处：《Acta Geologica Sinica(English Edition)》2025年第1期38-52,共15页地质学报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.42172258,42072227,U2244205);the Science and Technology Major Project of Xinjiang Uygur Autonomous Region,China(2023A03002);the National Key Technology Research and Development Program of the Ministry of Science and Technology of China(Grant No.2015BAB05B04);the Joint Innovation Fund of China National Uranium Co.,Ltd.,and State Key Laboratory of Nuclear Resources and Environment(Grant No.NRE2021-01);the China Geological Survey(Grant Nos.DD20242868,DZLXJK202206)。

摘　　要：The Southwest Tianshan is the suture zone between the Central Tianshan and the Tarim Craton.To better illustrate the subduction polarity of the Southwest Tianshan Ocean,a systematic detrital zircon LA-ICP-MS U-Pb geochronology of sedimentary rocks of the Devonian Apadaerkang Formation and the Carboniferous Akeqiayi Group of the Biedieli area in the Wushi region is the focus.Detrital zircon ages indicate that the youngest grains of the targeted quartz sandstones are Late Devonian and Early Carboniferous in age,respectively.These ages also have relatively similar age spectra,indicating a similar tectonic setting and source in the Biedieli area during the Devonian to Carboniferous.The main spectrum peaks occur at 2360,1960,810,640 and 440 Ma,with a principal age peak in the early Paleozoic(474-430 Ma),and the Central Tianshan Terrane is indicated as the main source.The detrital zircon geochronology and sedimentary characteristics of the Biedieli rocks indicate that the Paleozoic sedimentary rocks in the northern Wushi region were formed at an active continental margin,associated mainly with the early Paleozoic subduction of the South Tianshan Ocean.

关 键 词：detrital zircon LA-ICP-MS U-Pb Wushi Southwest Tianshan 

分 类 号：P548[天文地球—构造地质学] P534.4[天文地球—地质学]