裂谷盆地烃源岩中的火成岩及其活动模式——以东营凹陷为例  

Igneous Rock and Its Active Mode in Source Rocks of Rift Basin——An example of Dongying sag

作　　者：金强[1] 翟庆龙[2] 万从礼[3] 

机构地区：[1]石油大学,山东东营257061 [2]中国石化胜利油田有限公司,山东东营257000 [3]中国石油长庆油田分公司勘探开发研究院,西安710015

出　　处：《新疆石油地质》2005年第3期231-233,237,共4页Xinjiang Petroleum Geology

基　　金：国家自然科学基金资助项目(40272061)

摘　　要：许多裂谷盆地的主力烃源岩中分布有基性火山岩和侵入岩。综合运用东营凹陷沙三段火成岩成分、结构、构造、蚀变特征和K-Ar同位素等分析资料,结合研究区的构造地质特征,确定了火成岩成因类型以及它们与围岩的相互作用。以滨南和纯西地区为例,建立了烃源岩沉积环境中水下喷溢、烃源岩埋藏过程中浅层侵入的两种火成活动模式。探讨了两种火山活动形式对烃源岩形成、生烃演化和排烃的有益作用。Basic volcanic and intrusive rocks are normally distributed in major source rocks in many rift basins.The analytical data such as volcanic composition,texture,structure and alteration features as well as K-Ar isotope data from member-3 of Shahejie formation in Dongying sag are used,combined with the structural geology characteristics in studied area,to determine the volcanic genesis type and its effect on neighboring rocks.Taking Binnan basalts and Chunxi gabbros as example,the underwater effusion model for the basalts in source rock sedimentary environment and the intrusion model for the gabbros in the shallow-buried source rocks are developed.The helpful effects of these two models on source rock's formation,hydrocarbon generation and expulsion are discussed.

关 键 词：裂谷盆地 烃源岩 火成岩 火山作用模式 东营凹陷 活动模式 油气资源 

分 类 号：P618.130.2[天文地球—矿床学]