地质学报2012，Vol.86Issue(11)：1773-1780,8.
内蒙古西部额济纳旗及邻区二叠纪暗色泥岩微量元素和稀土元素地球化学特征
Rare Earth and Trace Elements Geochemical Characteristics of the Dark Permian Mudstones in Ejinaqi and Its Surrounding Areas,Western Inner Mongolia
摘要
Abstract
The analysis of trace elements of the dark Permian mudstones shows that Ejinaqi and its surrounding areas were semi-salt water sedimentary environment during the Permian. Vertically, the water salinity was gradually reduced, and this process was synchronous with the extinctive process of the rift basin. Horizontally, salinity in the east (to east of the Yagan area) was obviously higher than that in the west (Beishan area), which was probably related to paleo-geographical sedimentary pattern (deep water in the east and shallow in the west) , and was consistent with the distribution characteristics of paleontology. Combined with the analysis of V/V+Ni and Ceanom of mudstones, it is suggested that Permian period was characteristic of reductive environment and was helpful to the preservation of organic matters. Combination of distributive pattern of the rare earth elements from dark mudstones with field geological survey indicates that its province was from the upper crust and its parent rocks were the mixing of claystones and granite rocks in the studied area.关键词
泥岩/微量元素/稀土元素/古盐度/还原环境/母岩/二叠纪/内蒙古Key words
mudstones/ trace elements/ rare earth elements/ paleosalinity/ reductive environment/ parent rocks/ Permian/ Inner Mongolia引用本文复制引用
宋健,赵省民,陈登超,邓坚,苗忠英,明承栋,陆程..内蒙古西部额济纳旗及邻区二叠纪暗色泥岩微量元素和稀土元素地球化学特征[J].地质学报,2012,86(11):1773-1780,8.基金项目
本文为中国地质调查局"天山-兴蒙构造带石炭-二叠系对比研究"项目(编号1212011120966)资助成果. （编号1212011120966）
