雷家地区古近系沙四段湖相白云岩成因  

Origin of lacustrine dolostone in Paleogene Sha 4 Member in Leijia area

作　　者：刘雪松[1,2] 贾海燕 韩亚杰[2] 赵会民 LIU Xue-song;JIA Hai-yan;HAN Ya-jie;ZHAO Hui-min(College of Earth Sciences,Jilin University,Changchun 130061,China;Museum of Geology,Jilin University,Changchun 130026,China;Geology Institute of CNPC Greatwall Drilling Company,Panjin 124010,Liaoning,China)

机构地区：[1]吉林大学地球科学学院,长春130061 [2]吉林大学地质博物馆,长春130026 [3]中国石油长城钻探工程公司地质研究院,辽宁盘锦124010

出　　处：《世界地质》2019年第3期767-773,共7页World Geology

基　　金：中国地质调查局项目(1212011120730);国土资源部公益性行业科研专项经费项目(201011083)

摘　　要：辽河西部凹陷雷家地区古近系沙四段中广泛发育湖相白云岩,是油气勘探的主要目的层段。白云岩主要形成于滨浅湖环境中,垂向上与泥岩、油页岩及生物灰岩共生。通过对雷家地区沙四段白云岩沉积学理论上的成因分析,认为白云岩主要属于成岩埋藏白云岩和准同生白云岩,且古气候条件和海侵作用为湖相白云岩的形成创造了条件。The lacustrine dolostone develops extensively and is the main purpose strata for the oil and gas exploration in Paleogene Sha 4 Member in Leijia area of western Liaohe sag.The dolostone are formed in shallow lake and are assoiated with mudstone,oil shale and bioclastic limestone vertically.Through the study of dolomite genesis on theory,the two models of dolomization have been set up,i.e.the burial diagenetic dolomization and the penecontemporaneous dolomization.The palaeoclimate and transgression have exerted an important effect on the formation of the lacustrine dolostone.

关 键 词：白云岩 成因 准同生白云岩 沙四段 雷家地区 

分 类 号：P618.130[天文地球—矿床学]