摘要
优质烃源岩发育与热水沉积有着紧密的联系,通过对贵州地区下寒武统牛蹄塘组底部烃源岩地球化学特征研究发现,牛蹄塘组底部地层受陆源输入和热水沉积作用共同影响。沉积物中稀土元素总量变化范围较大,受热水沉积作用影响强的地层稀土元素总量极低。牛蹄塘组底部As、Sb元素异常富集和正Eu异常表明,热水沉积作用对黔东南的羊跳剖面和九门剖面影响较强,对黔西的联兴和温水剖面影响较弱。δEu/Al值可用来判别并指示热水沉积作用的影响强度,对热水沉积作用的理论研究具有指导意义。
High-quality source rock is closely related to the development of hydrothermal sedimentation in geochemistry and others.By studying the characteristics of the source rocks of Lower Cambrian Niutitang Formation in Guizhou Province,it is found that the strata were affected by both terrigenous input and hydrothermal sedimentation.The total amount of REEs widely varied,and there are a few samples have a very low total REEs amount.The influence of the hydrothermal sedimentation is strong in Yangtiao and Jiumen sections,while relatively weak in Lianxing and Wenshui sections.As and Sb are enriched in the Niutitang Formation.The δEu/Al ratio can be used to distinguish and indicate the intensity of the hydrothermal sedimentation.
作者
贾智彬
侯读杰
孙德强
姜玉涵
张自鸣
洪梅
Jia Zhi-bin;Hou Du-jie;Sun De-qiang;Jiang Yu-han;Zhang Zi-ming;Hong Mei(School of Energy Resources,China University of Geosciences（Beijing）,Beijing 100083,China;Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism,Ministry of Education,Beijing 100083,China;Key Laboratory oJ Strategy Evaluation for Shale Gas,Ministry of Land and Resources,Beijing 100083,China;Institutes of.Science and Development,Chinese Academy of Sciences,Beijing 100190,China)
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2018年第7期1031-1041,共11页
Natural Gas Geoscience
基金
国家自然科学基金项目"中国南方海相热水沉积区优质烃源岩发育特征与成因机理"(编号:41472108)资助
关键词
热水沉积
优质烃源岩
地球化学
δEu/Al
Hydrothermal sedimentation
High-quality source rock
Geochemistry
δEu/Al
