地质与资源2019，Vol.28Issue(2)：140-148,9.
大兴安岭中南段下二叠统寿山沟组典型泥岩地球化学特征及其地质意义
TYPICAL MUDSTONE OF THE LOWER PERMIAN SHOUSHANGOU FORMATION IN MIDDLE-SOUTH DAXINGANLING MOUNTAINS: Geochemical Characteristics and Geological Implications
摘要
Abstract
The mudstones of Lower Permian Shoushangou Formation in Xi Ujimqin Qi of Inner Mongolia are well-develoPed source rocks in middle-south Daxinganling Mountains. With study on the characteristics of major,trace and rare earth elements in the mudstones, the PaPer analyzes the Provenance, tectonic setting and weathering of Shoushangou Formation in dePth. The ICV values of rock samPles ranging from 1.15 to 1.57 (averagely 1.33)show that the samPles are basically not affected by secondary diagenesis. According to the A-CN-Κ triangular diagram,the mudstones are subjected to certain Κ-metasomatism. The CIAcorr values of 54.28-70.06 (averagely 65.33)are gained after correction,indicating the Provenance has exPerienced Primary-moderate weathering. Based on the analysis on the multivariable environment of major and trace elements,it is concluded that the argillaceous sediments of Shoushangou Formation are mainly derived from the felsic Provenance,mixed with minus materials from the femic volcanic rock Provenance,under the tectonic background of continental island arc. From the above,it is thought that the sedimentary features of the mudstones in the study area are attributed to the subduction of the Paleo-Asian Oceanic crust in early Permian.关键词
寿山沟组/泥岩/地球化学/物源/风化作用/构造背景/大兴安岭Key words
Shoushangou Formation/mudstone/geochemistry/Provenance/weathering/tectonic setting/Daxinganling Mountains分类
天文与地球科学引用本文复制引用
周成林,唐友军,刘彬..大兴安岭中南段下二叠统寿山沟组典型泥岩地球化学特征及其地质意义[J].地质与资源,2019,28(2):140-148,9.基金项目
中国地质调查局"松辽外围南部盆地群油气基础地质调查"项目(编号 DD20160167) （编号 DD20160167）
中国石油科技创新基金项目(编号 2017D-5007-0105). （编号 2017D-5007-0105）
