南海深水区白云凹陷烃源岩发育与三角洲—滨海相的共生关系  

TYPES IN SOURCE ROCKS IN BAIYUN SAG,SOUTH CHINA SEA AND ITS BEARING ON SEDIMENTARY FACIES

作　　者：兰蕾 李友川 孙玉梅 

机构地区：[1]中海油研究总院,北京100027

出　　处：《海洋地质与第四纪地质》2016年第5期121-129,共9页Marine Geology & Quaternary Geology

基　　金：国家重点基础研究发展规划(973)项目(2009CB219400)

摘　　要：通过热解、干酪根显微组分、色谱-质谱、孢粉与藻类分析,认为白云凹陷有机质来源以陆源高等植物为主。烃源岩的发育、质量与分布严格受沉积相控制,恩平组时期的三角洲平原亚相和浅海相发育以陆源高等植物贡献为主、丰度高的好烃源岩,其中,浅海相烃源岩有机质来源中,藻类贡献较三角洲平原亚相略高;珠海组时期的三角洲前缘亚相和半深海相分别发育以陆源高等植物贡献为主、丰度中等的烃源岩和陆源高等植物为主、有机质丰度低的差烃源岩。Three source rock intervals from the Baiyun Sag are analyzed with geochemical and other techniques,such as rock pyrolysis,kerogen maceral,GC-MS as well as sporopollen and algae analysis,in order to characterize the abundance and types of organic matter.It is revealed that the organic matter mainly comes from higher terrestrial plants and the abundance of the organic matter varies widely.The types of source rocks are closely related to the sedimentary facies or the environment of deposition.The source rock with high abundance and higher plant-dominated organic matter indicates a facies of delta plain;the source rock with moderate abundance and higher plant-dominated organic matter suggests a facies of delta front;the source rock with moderate abundance and mixed organic matter of higher plant and algae indicates a facies of shallow sea,and the source rock with low abundance of organic matter dominated by higher plant indicate a facies of deep sea.

关 键 词：烃源岩 三角洲平原 三角洲前缘 浅海 半深海 南海深水区 

分 类 号：P736.2[天文地球—海洋地质]