中南大学学报（自然科学版）2012，Vol.43Issue(8)：3121-3132,12.
琼东南盆地深水区长昌凹陷构造演化及其对层序样式的控制
Tectonic evolution and its controlling on sequence pattern of Chang-chang sag, deepwater area of Qiongdongnan basin, South China Sea
摘要
Abstract
The synsedimentary tectonic activities and ancient structural frameworks in different evolutionaiy stages of Chang-chang sag were revealed by the restoration of 3 seismic lines across Chang-chang sag using balanced cross-section technique. On the basis of recognition and redefinition of secondary ancient structural units and its evolutionary types in association with further comprehensive analysis of the controlling of structure evolution on sequence pattern, the sedimentary filling model of Chang-chang sag was established.The results show that the tectonic evolution of Chang-chang sag has experienced three stages, namely the faulted period during Eocene to early Oligocene, the faulted-depressed transition period during late Oligocene and the depression period during Neogene. Correspondingly, there are three superimposed basin prototypes with different structural frameworks in Chang-chang sag. In rifting episode I and rifting episode II there were mainly updip-basalslope fault abrubt slope belt sequence pattern and step-fault abrubt slope belt sequence pattern, while in rifting cpisodelll they gradually evolved to downdip-basalslope fault abrupt slope belt sequence pattern and step-fault gentle slope belt sequence pattern. And in the thermal subsidence period there were mainly faulting flexure belt sequence pattern and some downdip-basalslope fault abrubt slope belt sequence pattern, while in the accelerated subsidence period there was only simple flexure belt sequence pattern in Chang-chang sag. The large-scale low stand deltas, low stand fans and incised valley filling relating to fault slope belt and flexure belt should be favorable exploration areas of structural-lithologic reservoir and lithologic reservoir.关键词
琼东南盆地/长昌凹陷/层序样式/深水勘探/南中国海Key words
Qiongdongnan basin/Chang-chang sag/sequence pattern/deepwater area exploration/South China Sea分类
天文与地球科学引用本文复制引用
廖计华,梅宾博,汪晶,王华,孙志鹏,张道军,肖军,孙鸣,李彦丽,任桂媛,罗青..琼东南盆地深水区长昌凹陷构造演化及其对层序样式的控制[J].中南大学学报（自然科学版）,2012,43(8):3121-3132,12.基金项目
国家自然科学基金资助项目(40872077) （40872077）
国家“十二五”科技重大专项(2011ZX05025-002-02-02) （2011ZX05025-002-02-02）
中国地质大学(武汉)构造与油气教育部重点实验室开放课题(TPR-2011-06) （武汉）
