郯庐断裂带江苏段新生界三维地质构造建模  

Three-dimensional geological modeling of Cenozoic erathem in Jiangsu segment of the Tanlu fault zone

作　　者：王金艳[1] 鲁人齐[2,3] 张浩 李菊红 李丽梅 许汉刚 顾勤平[1] 疏鹏[5] 侯莹 Wang Jinyan;Lu Renqi;Zhang Hao;Li Juhong;Li Limei;Xu Hangang;Gu Qinping;Shu Peng;Hou Ying(Jiangsu Earthquake Agency,Nanjing 210014,China;Institute of Geology,China Earthquake Administration,Beijing 100029,China;State Key Laboratory of Earthquake Dynamics,China Earthquake Administration,Beijing 100029,China;Paradigm Technology(Beijing)Co.Ltd.,Beijing 100081,China;Anhui Earthquake Agency,Hefei 230031,China)

机构地区：[1]江苏省地震局,中国南京210014 [2]中国地震局地质研究所,中国北京100029 [3]中国地震局地震动力学国家重点实验室,中国北京100029 [4]帕拉代姆技术(北京)有限公司,中国北京100081 [5]安徽省地震局,中国合肥230031

出　　处：《地震学报》2020年第2期216-230,I0002,共16页Acta Seismologica Sinica

基　　金：中国地震局星火科技项目(XH18016Y);中国地震局地质研究所基本科研业务重点项目(IGCEA1602);国家重点研发计划(2018YFC1504104);新沂市活动断层探测与地震危险性评价项目;江苏省地震局青年科学基金(201802)共同资助。

摘　　要：本文基于SKUA-GOCAD三维建模软件平台的构造-地层实体建模流程,通过整合研究区大量地质、地球物理资料和数据利用地质时间域坐标系转换和离散光滑插值(DSI)技术,并结合非定量化的地质基础利用地质网格功能建立了郯庐断裂带江苏段新生界的三维地质构造模型,该模型包括地表、第四系底部、新近系底部和基岩顶部等四个层面的地层模型和断层模型。该模型定量化地给出了研究区第四系、新近系底界的三维结构和特征,并刻画了主要活动断裂的三维空间分布,通过该模型可以更直观地显示研究区新生代地层单元和断裂的变化规律,对深入分析活动断裂带的沉积与构造具有重要的意义。The establishment of three-dimensional geological structure model of active fault zones is an important basis for studying active faults,earthquake and geological disasters.Based on the tectonic-stratigraphic entity model flow of the 3 D modeling platform SKUAGOCAD,the UVT and DSI techniques in the geological time domain are used in this study.A3 D geological structure model of the Neogene in the Jiangsu segment of the Tanlu fault system is established,combined with the non-quantified geological foundation and the geological grid function.The three-dimensional model includes fault model and strata model with four layers(the surface,Quaternary bottom,Neogene bottom and bedrock top surface).The 3 D model of Cenozoic erathem in Jiangsu segment of Tanlu fault zone gives the 3 D structure and characteristics of Quaternary and Neogene basement quantitatively,and describes the 3 D spatial distribution of main active faults.The three-dimensional model can more intuitively understand the Cenozoic stratigraphic units and faults in the studied area,which is of great significance to the in-depth analyses on the sedimentation and structure of active fault zones.

关 键 词：三维地质构造建模 地震反射剖面 地质剖面 钻孔 SKUA-GOCAD三维建模软件 郯庐断裂带 

分 类 号：P315.2[天文地球—地震学]