现代地质Issue(6)：1360-1370,11.
湖相富有机质泥页岩地球化学元素高频变化及其地质意义：以泌阳凹陷 BY1井取心段为例
High-frequency Variation of Geochemical Elements and Its Geological Implication on Lacustrine Organic-rich Mudstone and Shale Formation:An Example from the Core-taking Segment of Well BY1 in the Biyang Depression
摘要
Abstract
In this paper,based on the variation of major and trace elements of samples from the core-taking seg-ment of the well BY1 in Biyang Depression by the method of portable fluorescence analyzer,all the tested ele-ments above are sorted into four types of proxies for paleoclimate,paleoproductivity,paleoredox and paleosalini-ty.The results show that there is a good correspondence between the vertical change of geochemical elements and parasequence cycle changes,and the change of the geochemical element cycles can be also used for classifi-cation of more high-frequency sequences.During the process of lake-water depth changes from deep to shallow in a high-frequency sequence unit,varies of elements in shales show apparently regular change,especially on the high-frequency cycle interface,such as the gypsum and dolomite occur near the interface of saltwater and brackish environment respectively,in which the paleoproductivity decreases and the depositional environment transform gradually to oxidation.Those facts result in the organic matter content markedly decreasing near the top interface of high-frequency cycles.The change of geochemical element cycles provides a new effective method for dividing high-frequency stratigraphic unit and forecasting the heterogeneity of organic matter distribution.关键词
泥页岩/地球化学元素/地层高频单元/核桃园组/泌阳凹陷Key words
mudstone and shale/geochemical element/stratigraphic high-frequency cycle/Hetaoyuan Forma-tion/Biyang depression分类
天文与地球科学引用本文复制引用
郭来源,李忠生,解习农,尚飞,樊中海,刘峥君,吴峰..湖相富有机质泥页岩地球化学元素高频变化及其地质意义：以泌阳凹陷 BY1井取心段为例[J].现代地质,2015,(6):1360-1370,11.基金项目
国家重点基础研究发展计划项目（2014CB239102）。 （）
