不整合带内部结构精细表征及其地质意义  

Fine Characterization of the Inner Structures of Unconformity Belt and the Geological Significance

作　　者：林志鹏[1,2] 单敬福 陈乐[1,2] 孙千军[3] 张坦 Lin Zhipeng;Shan Jingfu;Chen Lel,;Sun Qianjun;Zhang Tanl,(l. Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Educatio;School of Geosciences, Yangtze University, Wuhan 430100, China;School of Energy Resources, China University of Geosciences（Beijing）, Beijing 100083, China)

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [2]长江大学地球科学学院,武汉430100 [3]中国地质大学(北京)能源学院,北京100083

出　　处：《地质科技情报》2018年第1期16-26,共11页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41372125);湖北省教育厅基金项目(Q20121210);中国地质大学(武汉)重点实验室开放基金项目(TPR-2012-23)

摘　　要：目前对于不整合带的研究成果主要集中在不整合面与上下地层接触关系的分析和描述方面,对不整合带"三层结构"分层模式的研究,虽然在一定程度上揭示了不整合纵向上的层次结构,但对其内部结构精细化的表征与刻画还稍显不足。鉴于此,通过充分利用野外露头资料,结合前人的研究成果,对不整合带的结构进行了较为精细的刻画与分析,指出了"三层结构"的不唯一性,以过程沉积学为理论指导,依据"点-线-面"的方法和原则,提出了不整合带的"二维结构"与"三维结构"相结合的一种新的综合表征方法。二维结构是一种面性结构,三维结构是一种体性结构,并进一步论述了视不整合线和视不整合面对不整合结构的识别意义。依据不整合带的空间配置及其地质意义,建立了16种针对2类不整合的空间结构配置关系类型,以期进一步指导不整合带内部结构的认识。Recent researches on unconformity primarily focus on the analysis and demonstration of the unconformity surface and contact relationship between the upper and lower strata.In a long period,the three-layer structure proposed for unconformity has attracted much emphasis.However,the works are extremely poor to make fine characterization for the inner structure of unconformity belt.Inorder to depict the inner structure of the unconformity more exhaustively,we have integrated all the available data of outcrops over the world and the existing research results,and analysed in detail the unconformity belt structure to provide a systematic way to distinguish the unconformity structure from different conditions.Based on the process of sedimentology and the abundant outcrop data,two kinds of structural patterns are identified with ＂ two-dimension structure＂ and ＂ three-dimension structure＂,a new scheme for the characterization of unconformity structure.The structure of two-dimension is a sort of surface structure,while the structure of three-dimension is a sort of body structure,and discussion has been conducted for the recognition significance of the visual unconformity line and visual unconformity surface with respect to the unconformity belt structure.In accordance with the spatial distribution characteristics and petroleum geological significance of unconformity belt,16 types of structure configuration relationship are established.This analysis allows us to further understand and explore the unconformity structure of the oil migration and accumulation.

关 键 词：不整合 视不整合线 地质意义 精细表征 层次结构 

分 类 号：P542.3[天文地球—构造地质学]