摘要
为探讨沁水盆地东部Y井煤系页岩的元素地球化学特征,对下二叠统山西组、太原组的煤系页岩进行了系统采样,并应用电感耦合等离子体质谱法(ICP-MS)对18个煤系页岩样品的微量及稀土元素进行了分析测试。结果表明,煤系页岩的Sr、Sr/Ba、V/(V+Ni)、Ce_(anom)等地球化学指标的垂向变化,反映了从太原组到山西组沉积时期,水体古盐度整体逐渐降低的还原环境;物源主要来自盆地北邻阴山古陆前寒武纪花岗岩、麻粒岩及各时代侵入岩,源区构造背景主要为与大陆岛弧相关的活动大陆边缘。
The experiment aims to look into elemental geochemistry characteristics of shales in coal measures of the Well Y through a systematic sampling of coal shale in Shanxi Formation and Taiyuan Formation of Lower Permian in the eastern Qinshui Basin. The procedure utilizes inductively coupled plasma mass spectrometry(ICP-MS) for sample tracing of 18 coal measure shales to analyze the trace and rare earth elements. The results conclude that the vertical variation of geochemical indexes such as Sr, Sr/Ba, V/(V+Ni) and Ceanom in coal measure shales reflect the decline of the ancient salinity of the water body from the Taiyuan Formation to the Shanxi Formation. The environment principally derives from the Precambrian granite, granulite and intrusive rocks of various geological periods at the Yinshan paleo-continent in the north of the basin. The tectonic setting of source area is the active continental margin associated with the continental island arc.
作者
侯昌海
郭英海
HOU Chang-hai;GUO Ying-hai(College of Geosciences and, Resources, China University of Geosciences ( Beijing) , Beijing 100083 , China;Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education , China University of Mining and Technology, Xuzhou Jiangsu 221008 , China;School of Resources and Earth Science, China University of Mining and Technology, Xuzhou Jiangsu 221116, China)
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2019年第2期342-351,共10页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金资助项目(41572134)
