地质科技情报2017，Vol.36Issue(3)：7-17,11.DOI:10.19509/j.cnki.dzkq.2017.0302
新疆柯坪地区上泥盆统克孜尔塔格组砂岩物源分析及其大地构造意义
Provenance and Tectonic Significance of the Sandstone in Devonian Keziertage Formation in Keping, Xinjiang
摘要
Abstract
The analyses of lithogeochemical characteristics of the sandstone in Keziertage Formation at Keping,Xinjiang show that the stable elements(A12 O3,Fe2O3,MnO) are more than the unstable elements (MgO,K2O,Na2O).This illustrates that the sandstone must have gone through a distant transportation.There are more light rare earth elements than heavy rare earth elements,and Eu is obviously anomal.The comprehensive geochemical analyses suggest that the tectonic setting is apassive continental margin.The main provenance region is the mellow quartziferous provenance,with a few from the granite area.The zircon U-Pb dating indicates that the rock ages are grouped in 550-400 Ma,1 050-750 Ma,1 800-1 550 Ma and 2 550-2 400 Ma,which are responses of four tectonothermal events in Tarim area.According to results of geochemical characteristics and zircon U-Pb ages,the main provenance region is Precambrian basement and Early Palaeozoic Era igneous rock in the north Tarim uplift.关键词
克孜尔塔格组/常量元素/微量元素/碎屑锆石/U-Pb测年Key words
Keziertage Formation/major element/trace element/clastic zircon/U-Pb dating分类
天文与地球科学引用本文复制引用
阎琨,李伟,孙军刚,杨宝忠,李晓阳,苏佳..新疆柯坪地区上泥盆统克孜尔塔格组砂岩物源分析及其大地构造意义[J].地质科技情报,2017,36(3):7-17,11.基金项目
中国地质调查局西北沿边及特殊地区地质矿产调查二级项目(DD20160079) （DD20160079）
