摘要
用定量生物地层学的方法(RASC 和 CASC)对珠江口盆地东部34口井的古生物资料进行统计分析,建立了最佳生物地层序列。根据化石事件间的 RASC 距离,将这个最佳序列划出10个化石组合带,用 CASC 方法建立了区域地质年表,展示了地质年代、地层和RASC 分带之间的关系,并完成了井间对比。最后,根据 CASC 所提供的钻井时-深曲线,对10口井进行了沉降史分析,揭示了该区中新世以来构造沉降的时空特征。
Quantitative biostratigraphic analysis mehods (RASC and CASC) were used to study the paleontological data of 34 wells in Eastern ZhuJiang (Pearl) River Mouth Basin. The optimum biostratigraphic sequence was established. Ten fossil assemblage zones (RASC zones, in term of RASC distance) were identified, and regional geological time table was set up, which shows the relationship between age, strata, and RASC zones. Then selected wells were correlated. Finally, based on the time-depth curves for individual wells, the subsidence history was analyzed, and the spatcial and temporal variations of tectonic subsidence were revealed.
出处
《地质科学》
CAS
CSCD
北大核心
1993年第3期211-220,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
地层学
沉降史
珠江口盆地
古生物
Zhujiang River Mouth Basin, Quantitative biostratigraphy, RASC method(Ranking and Scaling), CASC method (Correlation and Scaling), Subsidence analysis
