CAJ | 학술논문

本文应用回剥法及地层骨架厚度不变模型对苏北盆地高邮凹陷沉积地层进行了去压实校正,利用声波时差及镜质体反射率法对三垛期末盆地剥蚀量进行恢复,用艾里公式对盆地的构造沉降量及总沉降量进行估算,进而对苏北盆地高邮凹陷晚白垩世-新生代沉降史进行分析.研究表明:高邮凹陷为典型的裂陷盆地,经过了拗断期-断拗期-断陷期-坳陷期的盆地演化阶段.演化过程经历了三期沉降和两期隆升.在不同的阶段凹陷的沉降中心略有不同,其受主边界断层的控制,围绕着边界断层呈串珠状分布.
본문응용회박법급지층골가후도불변모형대소북분지고유요함침적지층진행료거압실교정,이용성파시차급경질체반사솔법대삼타기말분지박식량진행회복,용애리공식대분지적구조침강량급총침강량진행고산,진이대소북분지고유요함만백성세-신생대침강사진행분석.연구표명:고유요함위전형적렬함분지,경과료요단기-단요기-단함기-요함기적분지연화계단.연화과정경력료삼기침강화량기륭승.재불동적계단요함적침강중심략유불동,기수주변계단층적공제,위요착변계단층정천주상분포.
The analysis of the subsidence history of the Gaoyou depression in northern Jiangsu basin during the Late Cretaceous to the Cenozoic is concerned with the decompaction correction based on the backstripping method and stratigraphic framework thickness model of the sedimentary strata in the Gaoyou depression, estimation of the thickness of the denudational strata in the depression during the latest Sanduoan based on the time difference of acoustic waves and vitrinite reflectivity, and calculation of the tectonic subsidence and total subsidence in the depression based on the Airy isostasy hypothesis. The results of research show that the Gaoyou depression is a typical rift basin, and has gone through the evolutionary stages of downwarping-faulting, faulting-downwarping, and rift faulting-downwarping, including three phases of subsidence and two phases of uplifting. The depocenters in individual stages are all controlled by main boundary faults, and display a beaded alignment around the boundary faults.