现代地质2016，Vol.30Issue(2)：426-435,10.
塔里木西北缘乌什南上石炭统索格当他乌组微量稀土元素特征及地质意义
Geological Significance and Characteristics of Rare Earth and Trace Elements from Upper Carboniferous Suogedangtawu Formation of the South of Wushi County in Northwestern Margin of Tarim Basin
摘要
Abstract
In order to discuss the sedimentary environment,provenance and tectonic settings of Upper Carboni-ferous Suogedangtawu Formation of Keping area in northwestern margin of Tarim Basin,on the basis of geolog-ical investigation,we selected 1 2 samples to test and analyze trace and rare earth elements.Redox-sensitive ele-ments combination and trace element characteristic parameters reflect that the fine-grained detrital rocks form in weak reduction environment.Using Hf-La /Th,La /Sc-Co /Th and REE-La /Yb diagram,trace element ratios (La /Sc,Sc /Th,Cr/Th and Co /Th),combined with microscopic identification,we regard that the sources of sediments are mainly from upper continental crust with felsic rocks.By the contrast of characteristics of REE, <br> combined with La-Th-Sc,Th-Sc-Zr/1 0,Th-Co-Zr/1 0 diagram,a conclusion can be drawn that the tectonic settings of the study area are continental island arc,active continental margin and passive continental margin.关键词
上石炭统/稀土元素/微量元素/沉积环境/物源属性/构造背景Key words
Upper Carboniferous/REE/trace element/depositional environment/provenance/tectonic setting分类
天文与地球科学引用本文复制引用
童雪飞,康志宏,周磊,刘晨晓,郭瑞琴,皇甫静静..塔里木西北缘乌什南上石炭统索格当他乌组微量稀土元素特征及地质意义[J].现代地质,2016,30(2):426-435,10.基金项目
国家自然科学基金项目（41272132）；中国地质调查局项目中国中、东部地区构造体系控油作用研究（1212011120965）；中国地质调查局项目塔西南凹陷古生界油气成藏条件评价项目（1211302108022－3）。 （）
