滦平盆地下白垩统西瓜园组震积软沉积变形  

K1 Xiguayuan Formation Soft-Sediment Deformation Caused by Earthquake in Luanping Basin

作　　者：郑宁[1] 宋天锐[1] 程木伟[2] Zheng Ning;Song Tianrui;Cheng Muwei(Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;Asia-Pacific Department,PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China)

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国石油勘探开发研究院亚太研究所,北京100083

出　　处：《地球科学》2020年第11期4198-4206,共9页Earth Science

基　　金：国家自然科学基金青年科学基金项目(No.41402100);中国地质调查局古亚洲成矿域大型资源基地地质背景分析项目(No.DD20190448);中国地质调查局全国陆域及海区地质图件更新与共享项目(No.DD20190370);中国地质科学院地质所项目(No.J2033)。

摘　　要：为完善对滦平盆地西瓜园组地震引发的软沉积变形构造的认识,综合利用野外观测与室内分析相结合、宏观沉积体系与微观软沉积变形构造等分析相结合的方法,对研究区震积成因的软沉积变形构造进行了研究.结果表明,在盆内主、次控盆断层夹角位置的两处剖面中,可见枕状构造、液化砂岩脉、液化砂岩侵位、液化角砾岩、液化卷曲变形、砂岩滴落体、火焰构造、球枕构造、枕状层、负荷构造和震积不整合的组合发育,且同一剖面具有垂向多次震积作用的连续发育特点,这些震积作用均被识别在扇三角洲前缘相带内.根据这些软沉积变形发育的位置、彼此组合伴生、连续发育和区域分布的特点,可识别出连续2次大地震的发生.In order to improve the understanding of soft-sediment deformation structures caused by earthquake of the Xiguayuan Formation in Luanping basin,they were studied by the method of combination of both the field investigation with laboratory analysis,and the macroscopic sedimentary system with microscopic soft-sediment deformation structure.In two sections at the angle between the main and secondary basin-controlling faults in the basin,pillow structure,liquefied sand veins,liquefied sand emplacement,liquefied breccias,liquefaction curl deformation,liquefied droplet,flame structure,ball-and-pillow structure,pillow beds,load structure and seismic unconformity plane were developed.Seismites deposited continuously in fan delta front.According to the location of these soft-sediment deformation,their association,continuous development and regional distribution,two successive earthquakes can be identified.

关 键 词：滦平盆地 西瓜园组 软沉积变形 地震 沉积学 

分 类 号：P95[天文地球—自然地理学]