渤海湾盆地第三纪的岩浆旋回  

Tertiary Magmatic Cycles of the Bohai Bay Basin

作　　者：肖尚斌[1] 

机构地区：[1]石油大学资源科学系,山东东营257062

出　　处：《地质论评》1999年第S1期581-586,共6页Geological Review

基　　金：石油天然气集团公司"九五"科技攻关项目(编号970206-02-01-08)的成果

摘　　要：本文提出了岩浆旋回的概念,初步探索了岩浆旋回的划分方法,并以构造演化为基础,结合岩浆活动方式、岩石地球化学指标,对渤海湾盆地岩浆旋回进行了划分。盆地中第三纪岩浆活动划分为两大旋回:早第三纪华北Ⅰ幕旋回和晚第三纪华北Ⅱ幕旋回。第一旋回(华北Ⅰ幕)划分为3期:孔店组(房身泡组)—沙河街组四段期、沙河街组三段—沙河街组二段期及沙河街组一段—东营组期。第二旋回(华北Ⅱ幕)为晚第三纪。旋回内部各期的早、晚岩浆活动形式有所不同。The conception of magmatic cycle is brought forward and the division of magmatic cycles is preliminarily studied in this paper. Two magmatic cycles, named Huabei episode Ⅰ and Huabei episode Ⅱ , have been identified in terms of structural evolution, magmatism and petrochemistry for the Tertiary magnetism in the Bohai Bay basin. The first episode is composed of stages Ek—Es^4, Es^3—Es^2 and Es^1—Ed, while the second one is composed of stage Ng—Nm. In every stage, the early magmatic activity is different from the late one.

关 键 词：渤海湾盆地 第三纪 岩浆旋回 模糊聚类 

分 类 号：P588.11[天文地球—岩石学]