论复合型花状构造  

A Re-discussion on Composite Flower Structure

作　　者：贾红义[1] 汤梦静[1] JIA Hongyi;TANG Mengjing(Geophysical Research Institute,Shengli Oilfield Company,Dongying,Shandong 257022,China)

机构地区：[1]胜利油田分公司物探研究院,山东东营257022

出　　处：《西安石油大学学报（自然科学版）》2022年第1期34-43,共10页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中国石油化工集团股份公司科技攻关项目(P18051-4,P19015-1)。

摘　　要：中国东部新生代陆相断陷湖盆沉积盖层广泛发育“负花状”构造,地质成因复杂多样。本文就惠民凹陷发育的两种复合型花状构造进行探讨。研究发现,地震剖面上表现形式相类似但其地质成因机制却有着本质的差别。基于地球物理资料及大量研究成果,通过构造的几何学、运动学特征深入剖析和古地质构造恢复,认为复合型花状构造发育受控于其所在的构造部位、局部应力场变化情况、断裂活动强弱转化过程、地幔物质上涌引起的底劈拱张、沉积压实及岩石力学性质和坡度被动变形等地质因素。惠民凹陷临北断阶带发育的垒背花状构造是古近纪应力场发生转换、多期断裂与断陷构造活动相叠加的结果。盘河隆背花状构造受控于沙四段沉积晚期基底卷入型的底辟隆升作用,与中央隆起带的持续活动有关。基于本文讨论,两种构造样式可统一划归为似花状构造,属复合型构造样式。由此提出走滑构造体系判识问题并引发思考与讨论。In eastern China,the"Negative flower"fault structures caused by many geological factors widely developed in the Cenozoic continental faulted lake basins.The purpose of this paper is to discuss on two kinds of flower-like structures developed in Huimin Sag of Bohai Bay Basin.The research showed that the two kinds of flower-like structures are similar in form of seismic profiles,but their control factors are quite different.Based on geophysical data and a lot of research results from the structural geometry and kinematics,as well as the Paleo-geological structure restoration,it is held that the flower structure was controlled by different geological factors,such as structural position,local stress,fault activity,diapir of mantle upwelling,sedimentation compaction,mechanical properties of rocks and passive deformation of slope.In Linbei step-fault zone of Huimin sag,the flower-like structure developing on up horst was controlled by the transformation of regionalstress field and superposition of multi-stage fault and fault depression tectonic activities in Paleogene.While the Panhe flower-likestructure developing above the Cenozoic paleo-uplift is controlled by the basement uplifting and diapir in the late of the fourth member of Shahejie formation,whichis certainly relevant with the continuous activity of the central bulge belt.The two structural styles can be classified as flower-liking structure,and belong to composite flower-like structural style based on the above discussion.The features and identification of the strike-slip tectonic system are need to be further kept thinking and discussing.

关 键 词：(似)花状构造 构造解析 构造恢复 深部地幔 惠民凹陷 渤海湾盆地 

分 类 号：P618.130.2[天文地球—矿床学]