稀土元素地球化学分析在岩相古地理研究中的应用  

APPLICATION OF GEOCHEMICAL ANALYSIS OF RARE EARTH ELEMENTS IN THE STUDY OF LITHOFACIES PALEOGEOGRAPHY

作　　者：鲁洪波[1] 姜在兴[1] 

机构地区：[1]石油大学石油资源科学系

出　　处：《石油大学学报（自然科学版）》1999年第1期6-8,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：根据层序地层学原理，对伊犁盆地二叠系至侏罗系层序和体系域进行了划分，并将稀土元素地球化学分析应用于中、下侏罗统层序岩相古地理研究中。稀土元素（ＲＥＥ）对识别层序、体系域边界及恢复层序框架内的沉积岩相古地理（古盐度、古水深、水体的ｐＨ及Ｅｈ值、氧化还原条件、湖平面升降变化）都具有重要意义。在缺乏其它资料的情况下，应用稀土元素地球化学分析方法可恢复地层层序的岩相古地理，指导层序地层框架内油气生、储、盖条件的研究。The geochemical analysis was carried out by using rare earth element (REE) in the study of lithofacies paleogeography of mid early Jurassic on Yili basin. The sequence and system tracts for the strata from Permian to Jurassic in Yili depression were classified. REE plays an important role in recognizing the boundaries of sequence and system tracts and reconstructing sediment lithofacies paleogeographic conditions, including ancient water depth, ancient salty, pH value and Eh value of water body, oxidation and reduction condition and eustacy of lake level. When data are insufficient, chemical analysis of REE can be used to rebuilt the lithofacies paleogeography of sequence. This method is favourable for the analyses of source,reservoir and cap rocks in the sequence framework.

关 键 词：稀土元素 地球化学 岩相 古地理 

分 类 号：P595[天文地球—地球化学] P531[天文地球—地质学]