摘要
沉积基准面升降变化及其规律是各种地质因素综合作用的结果，又是控制地层发育和沉积作用的主导因素．地震剖面中上超点的迁移变化规律和测井资料中Ｍｉｌａｎｋｏｖｉｔｃｈ旋回分析是研究沉积基准面变化的有效方法．塔里木盆地北部显生宙沉积基准面变化曲线由１３个长周期构成，并可组合为６个一级周期．基准面变化在三叠纪以前与全球海平面变化有着良好的一致性，三叠纪及其以后可比性较差．与控制沉积作用的基准面变化周期相对应，塔里木盆地沉积地层分为６个一级巨层序。
The changes and regularities of Phanerozoic base_level in Tarim basin reflected integrative results caused by various geological events, and played an important role in sedimentary evolution. The recognition of onlap points and their migrations in seismic section, and the analysis of Milankvitch cycles based on well_logs are effective approach to construct base_level change curves. Phanerozoic base_level change curves in Tarim basin are composed of 13 long cycles that can be associated with 6 first cycles. The correspondence between base_level change curves of Tarim basin and eustatic curve is much better before Triassic. In correspondence with base_level change cycles, depositional strata can be divided into 6 mega_sequences, and each has characteristic features in deposition and evolution.
出处
《地球科学（中国地质大学学报）》
EI
CSCD
北大核心
1998年第6期573-578,共6页
Earth Science-Journal of China University of Geosciences
基金
国家"八五"攻关项目
关键词
沉积演化
塔里木盆地
升降运动规律
显生宙
base_level
onlap points
well_log cycles
sedimentary evolution
Tarim basin.
