依兰盆地始新统达连河组油页岩成因新认识

J4 ›› 2012, Vol. 42 ›› Issue (4): 941-947.

依兰盆地始新统达连河组油页岩成因新认识

柳蓉^1,2,3,刘招君^1,2,3,杜江峰⁴,刘冬青¹,杨小红¹, 徐银波¹

1.吉林大学地球科学学院|长春130061;
2.吉林大学东北亚生物演化与环境教育部重点实验室|长春130061;
3.油页岩与共生能源矿产吉林省重点实验室|长春130061;
4.中国海洋石油总公司研究中心|北京100027

收稿日期:2011-10-11 出版日期:2012-07-26 发布日期:2012-07-26
作者简介:柳蓉(1976-)|女|副教授|博士|主要从事含油气盆地分析和油页岩成矿理论研究|E-mail:liurong@jlu.edu.cn
基金资助:
国家自然科学基金项目(40972076);国家潜在油气资源(油页岩勘探开发利用)产学研用合作创新建设项目(OSP-01)；吉林大学科学前沿与交叉学科创新项目（200903035）；吉林大学种子基金项目(2011-2012)

New Research on Oil Shale Origin of Eocene Dalianhe Formation in Yilan Basin

Liu Rong^1,2,3,Liu Zhao-jun^1,2,3,Du Jiang-feng⁴,Liu Dong-qing¹,Yang Xiao-hong¹,Xu Yin-bo¹

1．College of Earth Sciences, Jilin University, Changchun130061, China;
2．Key-Lab for Evolution of Past Life and Environment in Northeast Asia, Ministry of Education, Jilin University, Changchun130026, China;
3.Key-Lab for Oil Shale and Coexistent Energy Minerals, Jilin Province, Changchun130026, China;
4．China National Offshore Oil Corporation Research Center, Beijing100027,China

Received:2011-10-11 Online:2012-07-26 Published:2012-07-26

摘要/Abstract

摘要：

综合利用野外露头、岩石矿物组合、有机岩石学、元素地球化学等资料，研究了依兰盆地达连河组含煤-油页岩段与油页岩段油页岩成因。含煤-油页岩段油页岩有机质类型主要为II₁型,油页岩段油页岩有机质类型主要为II₁-II₂型，且都表现为弱氧化-还原特征，但是两者却具有不同的成因。含煤-油页岩段油页岩形成于湖泊-沼泽沉积体系，油页岩形成于湖泛作用基准面上升时期，直接发育在原来沼泽发育的位置，由于该时期水动力很弱，无法带入新的氧气，又有大量的生物生长并且不断原地死亡堆积，形成了有机质很丰富的油页岩。油页岩段油页岩形成于半深湖-深湖体系，该体系中频繁重力流作用的出现，把陆源碎屑带入深湖、半深湖中的时候，也把氧气带入到湖底，不利于有机质的保存，导致该油页岩段的有机质呈混合型以及弱氧化-还原特征。

关键词: 依兰盆地, 达连河组, 油页岩, 重力流

Abstract:

Utilizing comprehensive ways of field outcrops, mineral assemblages, organic petrology and element geochemistry analysis, we study the oil shale features and origins of coal-oil shale bearing and oil shale bearing sections in Dalianhe Formation, Yilan basin. Organic matter type of oil shale organisms in coal-oil shale bearing sections is II₁ and II₁-II₂ in oil shale bearing sections. Oil shale not only in coal-oil shale bearing sections, but also in oil shale bearing sections, are all characterized by weak oxidized-reduced, and with different origins.Oil shale of coal-oil shale bearing sections was generated in lacustrine-swamp systems and was located on the former swamps when the base level was rising. Because the hydrodynamic was relatively weak and oxygen can hardly be renewed, large quantities of plants and animals died and be well buried forming into organismrich oil shale. Oil shale of oil shale bearing sections was generated in deep and semi deep lacustrine systems, in which the gravity flows took place very often. Gravity flows can not only bring terrigenous clastics, but also induce oxygen into the deep and semi deep lacustrine systems. In this environment, organism was poorly preserved. As a result, the organisms in oil shale bearing sections are characterized by mixed ones (II₁-II₂) and weak oxidized-reduced.

Key words: Yilan basin, Dalianhe Formation, oil shale, gravity flow

中图分类号:

P618.12

柳蓉, 刘招君, 杜江峰, 刘冬青, 杨小红, 徐银波. 依兰盆地始新统达连河组油页岩成因新认识[J]. J4, 2012, 42(4): 941-947.

LIU Rong, LIU Zhao-jun, DU Jiang-feng, LIU Dong-qing, YANG Xiao-hong, XU Yin-bo. New Research on Oil Shale Origin of Eocene Dalianhe Formation in Yilan Basin[J]. J4, 2012, 42(4): 941-947.

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