3-D geologic architecture of Xiong’an New Area: Constraints from seismic reflection data
3-D geologic architecture of Xiong’an New Area: Constraints from seismic reflection data
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DOI：
10.1007/s11430-017-9188-4
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
D. He;S. Shan;Yuying Zhang;R. Lu;Ruifeng Zhang;Yongqian Cui
中科院分区：
文献类型：
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作者：
D. He;S. Shan;Yuying Zhang;R. Lu;Ruifeng Zhang;Yongqian Cui
研究雄安新区的地质构造，将为该地区地壳稳定性评价、城市规划和基础设施项目提供重要依据，对勘探油气、地热、干热岩等资源赋存情况也具有重要意义。利用最新的高质量地震反射和深井资料，建立了研究区的地层系统。运用构造分析方法，对研究区主要断裂的特征进行了精细的描述。利用平衡地质剖面技术恢复了雄安及邻区的构造演化。根据区内次级断裂的发育和活动地震的分布，讨论了研究区的构造活动性。研究表明，雄安新区位于冀中坳陷中部和北方的转换带。该区发育三个区域性不整合面，据此可划分出四个构造层。受太行山皮埃蒙特断裂、大兴断裂、荣成断裂和牛东断裂的控制，研究区的构造格局具有高凹相间的特点。这种构造格局对本区的储层特征、油气聚集、地热资源和干热岩的分布具有重要的控制作用。该区裂陷作用始于古近纪早期，具有典型的幕式特征，新近纪开始不活跃。次级断层的发育特征沿着活跃地震的分布表明，雄安新区自新第三纪以来一直处于相对稳定的构造环境中，而其东部的巴县凹陷等构造单元则明显处于相当活跃的环境中。
Studying the geologic architecture of the Xiong’an New Area will provide important basis for the evaluation of crustal stability, urban planning and infrastructural projects in this region, and it is also of great significance in exploring the occurrence of oil and gas, geothermal, hot dry rock and other resources. The stratigraphic system of the study area is established by using latest high quality seismic reflection and deep borehole data. Characteristics of the major faults developed in the study area are finely depicted with the method of structural analysis. Tectonic evolution of Xiong’an and adjacent areas is reconstructed by using balanced geological cross-section technique. The tectonic activity of the study area is discussed on the basis of the development of secondary faults and the distribution of active earthquakes across the region. This study demonstrates that Xiong’an New Area is located at the transfer zone of the central and northern Jizhong Depression. There are three regional unconformities developed in this area, by which four structural layers are sub-divided. Controlled by the Taihang Mountain piedmont fault, the Daxing fault, the Rongcheng fault and the Niudong fault, the structural framework of the study area is characterized by intervening highs with sags. This structural pattern has an important controlling over the reservoir characteristics, hydrocarbon accumulation and the distribution of geothermal resources and hot dry rock within this region. Rifting in this area began in the early Paleogene, exhibiting typical episodic character and became inactive in Neogene. The development feature of secondary faults along with the distribution of active earthquakes indicate that Xiong’an New Area has been in a relatively stable tectonic setting since the Neogene, while the Baxian Sag and other structural units to the east of it have obviously been in a rather active environment.