二连盆地白音查干凹陷下白垩统都红木组沉积特征及演化SEDIMENTARY CHARACTERISTICS AND EVOLUTION OF LOWER CRETACEOUS DUHONGMU FORMATION IN BAIYINCHAGAN SAG,ERLIAN BASIN IN INNER MONGOLIA
张志萍,林春明,徐深谋,李艳丽,岳信东,姚玉来,漆滨汶
摘要(Abstract)：
通过详细的岩芯观察、录测井资料分析,并结合区域地质资料和前人研究成果,对白音查干凹陷下白垩统都红木组的沉积相特征和沉积演化进行了深入研究。结果表明,白音查干凹陷主要发育扇三角洲相、辫状河三角洲相、浊积扇相和湖泊相4种沉积相类型。其中,扇三角洲和浊积扇在陡峭的北坡发育,辫状河三角洲在宽缓的南坡沉积,湖泊相分布在扇三角洲和辫状河三角洲的侧翼及凹陷的中心。都红木组沉积时期白音查干凹陷处于强裂陷向坳陷转化阶段。根据残留地层分布特征,其沉积演化可分为早、中、晚3个时期,从早期至晚期,扇三角洲和辫状河三角洲的面积不断缩小,分别后退了约3km和4-11km,湖泊沉积成为主体。
关键词(KeyWords)： 沉积相;沉积演化;沉积模式;都红木组;白垩系;白音查干凹陷;内蒙古
基金项目(Foundation): 科技部科技基础工作专项(2006FY120300-4)资助
作者(Author): 张志萍,林春明,徐深谋,李艳丽,岳信东,姚玉来,漆滨汶
DOI: 10.19839/j.cnki.dcxzz.2010.03.011
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