CAJ | 학술논문

应用沉降史分析和平衡剖面技术,通过对南襄盆地典型井的沉降史模拟及典型剖面的回剥,分析了南襄盆地的沉降史和构造发育史,并对盆地内各凹陷的沉降做出比较,进而反映该盆地的构造沉降特征和构造演化规律.研究表明:南襄盆地经历了中生代和新生代两期成盆过程,划分为白垩纪基底差异裂陷、白垩纪末期基底差异反转、古近纪基底差异裂陷、古近纪末期基底差异反转及新近纪基底整体拗陷5个主要构造演化阶段.两期成盆作用差异较大,盆地沉降中心发生明显迁移,从而造成各凹陷地层结构的差异性.
응용침강사분석화평형부면기술,통과대남양분지전형정적침강사모의급전형부면적회박,분석료남양분지적침강사화구조발육사,병대분지내각요함적침강주출비교,진이반영해분지적구조침강특정화구조연화규률.연구표명:남양분지경력료중생대화신생대량기성분과정,화분위백성기기저차이렬함、백성기말기기저차이반전、고근기기저차이렬함、고근기말기기저차이반전급신근기기저정체요함5개주요구조연화계단.량기성분작용차이교대,분지침강중심발생명현천이,종이조성각요함지층결구적차이성.
The subsidence history and the structural history in Nanxiang Basin were analyzed bysubsidence simulating on typical wells and back stripping for typical profiles based on thetechniques of subsidence history and balanced cross section, and the tectonic subsidence characteristics and evolution regularity were demonstrated by contrasting the subsidence of various depressions. The study results indicate that there are five main tectonic evolutionary phases,such as differential faulted depression in Cretaceous basement, differential inversion depression in the late Cretaceous basement, differential faulted depression in Paleogene basement, differential inversion depression in late Paleogene basement and whole de-pression in Neogene basement happened in Nanxiang Basin at two basin-forming stages of Mesozoic-Cenozoic. Obvious discrepancy appears in the process of two basin-forming stages, thesubsiding center migrates obviously, and the different structures of various depressions are formed.