摘要
利用稀土元素特征研究了准南三工河地区二叠系芦草沟组油页岩中陆源碎屑的来源、水体氧化还原性及古气候条件，认为油页岩中轻稀土元素富集，具有负铕、负铈异常的特征；成岩作用对油页岩中稀土元素质量分数的影响十分有限；陆源碎屑的源岩主要来自于博格达山地区中石炭世的大陆型拉斑玄武岩和沉积岩；油页岩形成于温暖湿润气候条件下的还原性古湖泊环境；油页岩中总稀土元素质量分数与总有机碳质量分数主要受控于油页岩形成时的古气候。
By means of the REE characteristics, the sources, water oxidation-reduction properties, paleoclimate conditions and so on are researched for the terrestrial detritus in Permian Lucaogou Formation oil shale in Sangonghe Area of South Junggar. The study results show that the light REEs are rich and characterized by the negative anom- alies for Eu and Ce; the influence of the diagenesis is very limited on REE concentrations; the source rocks of ter- restrial detritus mainly migrate from Middle Carboniferous continental tholeiite and sedimentary rocks in Bogda mountain area, the oil shale was formed in reducing palaeo-lake environment with warm and humid climate, and furthermore the mass fractions of both the total REE and the TOC are mainly controlled by the above paleoclimate when the oil shale was generated.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2012年第5期40-46,共7页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目（40972076）.
关键词
三工河地区
芦草沟组
油页岩
稀土元素
地质意义
Sangonghe area
Lucaogou Formation
oil shale
rare earth element （REE）
geological significance
