摘要
以地震剖面的精细解释为基础,借鉴典型盐或泥构造的研究成果,文中确立了东营凹陷盐-泥构造样式:盐-泥枕构造、盐-泥滚—滑脱断层簇—滚动背斜构造、盐-泥核背斜—拱顶断层簇构造。区域伸展作用下的重力滑动作用是东营凹陷盐-泥构造的主导成因机制。重力滑动作用表现为触发盐-泥层的聚集—隆升和引起薄皮滑脱作用。由此文中将盐-泥构造演化历程划分为盐-泥枕发育期和滑脱断层—盐-泥滚—盐-泥核背斜发育期。最终建立了东营凹陷盐-泥构造的成因-演化模式。
Salt-mud tectonics is a kind of tectonics resulted from the distortion of salt-mud bed flow, which is significantly different from pure salt or mud tectonics. Based on the detailed interpretation of seismic profiles with a seismic net spacing of almost 2 km, we have distinguished and defined the following salt-mud tectonic styles in the Dongying Depression= salt-mud pillow, salt-mud roller-detachment fault-rollover anticline and salt-mud core anticline-keystone fault family. The triggering mechanism for the salt-mud tectonics was gravita- tional gliding accompanying regional extension. Salt-mud bed accumulation and upwelling and thin-skinned detachment led to gravitational gliding. Consequently, the evolution of salt-mud tectonics may be divided into two stages: (1) a salt-mud pillow developing stage (before SB6'); (2) a detachment fault, salt-mud roller and salt-mud-core anticline developing stage (after SB6').
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2005年第4期403-409,共7页
Earth Science Frontiers
基金
国家自然科学基金青年科学基金资助项目(40402014)
中国地质大学(武汉)优秀青年教师资助计划资助项目(CUGQNL0317)
关键词
盐-泥构造
构造样式
成因机制
东营凹陷
salt-mud tectonics
structural styles
genetic mechanism
Dongying Depression