大港歧口沿岸带前第三系构造体系探讨  

A Discussion on the Pre-Tertiary Structural System of Qikou Coastal Zone in Dagang Oilfield

作　　者：郝银全[1] 潘懋[2] 常毓文[1] 谢培工[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]北京大学造山带与地壳演化教育部重点实验室,北京100871

出　　处：《地球学报》2005年第3期223-228,共6页Acta Geoscientica Sinica

摘　　要：大港歧口沿岸带位于太行山基底和鲁西基底接触的断裂带上———聊兰断裂北延段,沿海岸线呈NNE向展布。该带不仅是一个地理界线,而且是一个由基底断裂带控制的前第三系雁列褶皱带和第三系构造转换带。本文从分析区域构造背景入手,详细探讨了该带前第三系构造体系特征及其形成和演化过程。大港歧口沿岸带前第三系雁列褶皱带在平面上是由一系列NE向左阶排列的褶皱组成的左阶雁列构造,垂向上具有正花状断裂组合特征;是在印支期NEE向大型舒缓隆起的背景上,受燕山早期(晚三叠世到中侏罗世)深断裂的左旋压扭作用和燕山晚期的走滑作用形成,并在后期受到了喜马拉雅期伸展裂陷作用的强烈改造。The NNE-striking Qikou coastal zone is located along the northern extension of Liaolan fault separating Taihang Mountain from Luxi basement. It serves not only as a geographic boundary but also as pre-tertiary en-echelon drapes and a Cenozoic tectonic conversion zone controlled by the basement fault zone. This paper discusses in detail the pre-Tertiary tectonic system and its evolutio-nary process based on regional background analysis. The main feature is a sinistral en-echelon structure made up of a serial of NE arrayed left-side-driving drapes and upheavals in plane, which display positive flower fault array in profile. The system was formed by the early Yanshanian deep fault compressive-wrench on the basis of Indo-Sinian NEE large-scale upheavals, and was reconstructed by the Himalayan stretch rift-depression action.

关 键 词：前第三系 构造体系 沿岸 区域构造背景 喜马拉雅期 演化过程 体系特征 雁列构造 组合特征 走滑作用 燕山晚期 中侏罗世 晚三叠世 燕山早期 裂陷作用 断裂带 褶皱带 基底 太行山 海岸线 转换带 印支期 深断裂 鲁西 展布 

分 类 号：P618.13[天文地球—矿床学] P552[天文地球—地质学]