辽东凹陷南部孔店组孢粉藻类沉积特征及环境研究  

Sedimentary Characteristics and Environment of Sporopollen and Algae from Kongdian Formation in Southern Liaodong Sag

作　　者：方旭蕾 杨飞[3] 王琳霖[1,2] 李强 

机构地区：[1]长江大学地球科学学院,武汉430100 [2]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [3]长江大学地球物理与石油资源学院,武汉430100 [4]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《重庆科技学院学报（自然科学版）》2016年第2期14-17,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金项目"浅水湖盆三角洲沉积调查与物理模拟"(41072087)

摘　　要：根据沉积岩内孢粉藻类的沉积特征可以还原地层沉积时期的古环境。以LD17-1-1Z井为例,通过分析孔店组41块岩屑样品的孢粉、藻类分布信息和岩性特征,结合高精度三维地震资料对辽东凹陷南部地区孔店组的古沉积环境进行恢复。岩屑样品主要岩性为浅灰色砾岩、含砾砂岩、砂岩、灰绿色泥岩和少量红色泥岩,其中发育大量孢粉化石。以孢粉、藻类对气候条件和沉积环境的指示为基础,结合岩性组合特征对研究区孔店组的气候和沉积环境进行探讨,认为研究区孔店组沉积时期主要发育形成半干旱-半湿润气候背景下的浅湖沉积环境。Sedimentary characteristics of sporopollen and algae can resume sedimentary environment of the sedimentary rock. By the example of LD17-1-1Z,combining with the high resolution 3D seismic,palaeosedimentary environment of Kongdian formation in the southern Liaodong sag has been resumed by analyzing the distributed information of sporopollen and algae from the 41 samples of debris and lithologic features. The results show that： the lithology of Kongdian formation mainly contains light gray conglomerate,pebbled sandstone,sandstone,gray green mudstone and a small amount of red mudstone,and develop a lot of sporopollen fossil. On the basis of the instructions of palaeoclimate and depositional environment by sporopollen and algae,combined with the analysis of the palaeoclimate and depositional environment by the lithologic assemblages of Kongdian formation,we found that the study area mainly developed shallow lake sedimentary environment under the condition of drought- semi- arid climate.

关 键 词：辽东凹陷 孢粉 藻类 古气候 沉积环境 孔店组 

分 类 号：P618[天文地球—矿床学]