论文部分内容阅读
通过近几年对层序地层学的深入研究，尤其是对上扬子地台西缘中三叠世拉丁期末和晚三叠世卡尼期周缘前陆盆地层序地层学的研究，提出了动力层序地层学。将边缘前陆盆地由盆缘逆冲断块向克拉通稳定边缘分为Ａ区带和Ｂ区带（Ｐｏｓａｍｅｎｔｉｅｒ等，１９９３）。在同一视海平面升降旋回周期内，Ａ区带和Ｂ区带的视海平面旋回截然不同。Ａ区带构造沉降速率大于全球海平面升或降速率，表现为视海平面的上升旋回，因此，沉积物容纳空间主要由盆缘冲断块的逆冲活动所制约。Ｂ区带与被动边缘背景类似。由此，提出了Ａ区带动力层序由前陆挠曲变形体系域（ＦＳＴ）和前陆塑性变形体系域（ＶＳＴ）组成。由ＦＳＴ→ＶＳＴ反映了沉积物容纳空间不断增大的过程，指示了盆山转换系统的发生、发展的历史，反映了盆转山—山控盆的动力层序地层的构成特色
Based on the deep research of sequence stratigraphy in recent years, especially the study of the sequence stratigraphy of the Late Triassic Late Triassic Canis Period and the Late Triassic Foreland Basin in the Upper Triassic, Sequence stratigraphy. The marginal foreland basin is divided into A zone and B zone from the basin edge thrust to the craton stability edge (Posamentier et al., 1993). In the same sea level ascending and descending cycles, the sea level A and B zones have different apparent sea level cycles. Zone A sedimentation rate is greater than the global sea level rise or fall rate, showing as the sea level rise cycle, so the sediment storage space mainly by the basin edge thrust block the thrust control. Zone B is similar to passive edge background. Therefore, it is proposed that the A-zone driving-force sequence consists of a foreland deflection system tract (FST) and a foreland plastic deformation system tract (VST). From FST to VST, the process of increasing sediment storage space reflects the history of the occurrence and development of basin-to-mountain conversion system and reflects the formation characteristics of the dynamic sequence stratigraphy of the basin rotation-basin control basin