渝东北地区页岩的稀土元素地球化学特征
发布时间：2018-07-29 06:49
【摘要】：为了查明渝东北城口—巫溪地区上奥陶统五峰组—下志留统龙马溪组页岩中稀土元素的特征、来源及其地质意义,应用电感耦合等离子体质谱法(ICP-MS)对渝东北城口明中地区11件页岩样品的稀土元素及微量元素进行测试,结合前人所测巫溪田坝地区12件稀土、微量元素测试分析结果,全面分析了稀土元素、地球化学参数、空间分布规律及分布模式。研究表明:渝东北城口—巫溪地区页岩稀土元素相对亏损,五峰组页岩中的稀土元素略低于龙马溪组;稀土元素总量∑REE与Sc,Ti,Cr,Zn,Zr,Nb,Th,Hf,Ta等大离子亲石元素元素呈明显正相关,反映了研究区页岩中稀土元素的来源主要为陆源碎屑;在五峰组页岩早期沉积速率、稀土元素及微量元素比值的突变界面,可能是都匀运动(加里东运动第2幕)的影响范围延伸至该地区所出现的沉积响应。
[Abstract]:In order to find out the characteristics, sources and geological significance of rare earth elements in the shale of the Upper Ordovician Wufeng formation and Lower Silurian Longmaxi formation in Chengkou-Wuxi area of northeast Chongqing, The rare earth elements and trace elements of 11 shale samples in Chengkou area of northeast Chongqing were measured by inductively coupled plasma mass spectrometry (ICP-MS). The results of 12 rare earth elements and trace elements in Wuxi Tianba area were analyzed. The rare earth elements, geochemical parameters, spatial distribution and distribution model are comprehensively analyzed. The results show that the rare earth elements of shale in Chengkou-Wuxi area of northeast Chongqing are relatively depleted, the rare earth elements in the Wufeng formation are slightly lower than those in the Longmaxi formation, and the total amount of rare earth elements 鈭，
本文编号：2151870
[Abstract]:In order to find out the characteristics, sources and geological significance of rare earth elements in the shale of the Upper Ordovician Wufeng formation and Lower Silurian Longmaxi formation in Chengkou-Wuxi area of northeast Chongqing, The rare earth elements and trace elements of 11 shale samples in Chengkou area of northeast Chongqing were measured by inductively coupled plasma mass spectrometry (ICP-MS). The results of 12 rare earth elements and trace elements in Wuxi Tianba area were analyzed. The rare earth elements, geochemical parameters, spatial distribution and distribution model are comprehensively analyzed. The results show that the rare earth elements of shale in Chengkou-Wuxi area of northeast Chongqing are relatively depleted, the rare earth elements in the Wufeng formation are slightly lower than those in the Longmaxi formation, and the total amount of rare earth elements 鈭，
本文编号：2151870
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