Two Types of Strike-Slip and Transtensional Intrabasinal Structures Controlling Sandbodies in Yitong Graben     

王家豪  陈红汉  王华  江涛  苗红波 《中国地质大学学报(英文版)》2011,(3)

Recently,the researches on structure controls on sandbodies have provided a new method for predicting petroleum reservoirs.The Yitong(伊通) graben is situated in the northern section of the Tan-Lu(郯-庐) fault system in eastern China.It was characterized by dual properties of strike-slip and extension in Cenozoic.Two types of intrabasinal structures were identified as oblique fault and trans-verse uplift in the graben.The oblique faults arranged en echelon in plain and locally presented nega-tive rosette struct...  相似文献   

Member 1 of Yongji Formation （Eyl） sedimentary characteristics and its origin analysis in Yitong Graben     

References： 《东北亚地学研究》2007,10(1):17-21

Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and its sedimentary facies and tectonic evolution. On the basis of the research of core analyses, well logging data analyses, sedimentary facies analyses and seismic reflection structure analyses, the authors have concluded the sedimentary characteristics of Eyl, and have carried out Eyl sedimentary environments and its origin. The result shows that Eyl desultory-weak or gap seismic reflection may be a series of small scale secondary sediment fans superimposition.  相似文献   

Member 1 of Yongji Formation(Ey1) sedimentary characteristics and its origin analysis in Yitong Graben     

Changwei CHEN  Linfu XUE  Hongbing DAI  Jian WANG Xingke XU  Qinglong MENG College of Earth Sciences  Jilin University  Changchun  China 《东北亚地学研究》2007,(1)

Ey1 has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics.It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and its sedimentary facies and tectonic evolution.On the basis of the research of core analyses,well logging data analyses,sedimentary facies analyses and seismic reflection structure analyses,the authors have concluded the sedimentary characteristics of Ey1,and have carried out Ey1 sedimentary environments and its origin.The result shows that Ey1 desultory-weak or gap seismic reflection may be a series of small scale secondary sediment fans superimposition.  相似文献   

浅层地震剖面揭示太行山东南缘汤西断裂构造特征     

朱国军  袁洪克  何银娟  韩健  李吉昌  刘增祺  刘超  王景红 《大地测量与地球动力学》2020,40(11):1108-1111

结合高分辨率浅层地震剖面和区域地质资料,对汤西断裂浅部构造特征进行分析和讨论。结果表明,汤西断裂南段由2条走向NE、倾向SE的正断层组成,主断层下降盘汤阴地堑内新近系沉积明显增厚,结合探槽结果认为,汤西断裂南段的最新活动时代为中更新世。  相似文献   

2020-07-23西藏尼玛M_W6.3地震震源参数InSAR反演与发震构造研究     

梁世川  瞿伟  陈海禄  高源  李久元  李达 《大地测量与地球动力学》2022,42(1):71-76

针对2020-07-23西藏尼玛M_W6.3地震发震构造的复杂性(无明显地表破裂、发震断层倾向存在争议等),利用哨兵-1A升、降轨影像数据获取此次地震的同震形变场,并以此为约束通过设置两组可能性断层滑动模型及结合区域余震分布和地质构造背景,探讨此次地震发震断层的活动方式,在此基础上进一步反演获得断层面滑动分布特征。结果表明,此次地震发震断层为依布茶卡地堑东侧NWW向正断层,断层走向为207°,倾角为33.1°,平均滑动角为-89.27°,以正断倾滑为主;地震破裂主要集中在沿断层面5.4~9.3 km深处(未破裂至地表),最大滑动量约1.7 m,矩震级为6.3级。此次地震的发生是青藏地块现今构造运动变形的结果。  相似文献   

山西霍山山脉河流地貌定量参数及其构造意义   总被引：2，自引：0，他引：2  

徐岳仁  何宏林  邓起东  魏占玉  毕丽思  孙浩越 《第四纪研究》2013,33(4)

河流地貌形态定量研究是了解构造活动与地表过程耦合作用的重要途径之一.霍山山脉位于山西地堑系中部,介于临汾盆地和太原盆地之间,以发育霍山山前断裂带和1303年洪洞Ms8级地震而著名,通过分析跨断裂带及周边的48条河流的纵剖面形态、SL参数、Hack剖面、面积高程积分曲线以及HI值等,得到以下认识:1)跨断裂带的河流,其纵剖面在断层两侧的形态具明显差异,反映其受断层活动控制,而其他河流,除极少部分在上游存在局部陡变外,纵剖面为近似下凹的指数曲线形态显示近均衡状态;2)河流的HI值及积分曲线显示了霍山地区新生代以来整体处于强抬升弱侵蚀状态,即所有河流均处于壮年或幼年期;3)48条河流一致上凸的Hack剖面也表明霍山地区新生代以来处于强烈的构造抬升阶段,跨断裂带的Hack剖面形态以陡变下降而区别与其他河流的近似圆弧形;4)跨断裂带河流的SL/K参数在断层附近出现异常高值,反映了SL/K参数与断层垂直差异运动的相关性,周边其他河流的SL/K参数反映了没有差异运动的准均衡状态,局部的异常高值可能对应不同基岩的抗风化能力差异.河流地貌定量参数与构造环境存在显著的相关性,河流地貌定量参数特征揭示霍山山前断裂带在新生代以来的强烈垂向运动特征.  相似文献   

ɽ�������ִ��ؿǴ�ֱ�˶��о�   总被引：1，自引：0，他引：1  

塔拉  陈阜超  周海涛  郭宝震  郭良迁 《大地测量与地球动力学》2014,34(1):32-37

?????????1980-2010?????????????????????α???????????????????????????????????????????????????????????????????о????????????30???????????仯??????????????????????????????????????????????????????б????????????????б???????????????б???????????α????????????????????????????????????????2.68 mm/a????????????????1.14~4.33 mm/a????????????  相似文献   

Large scale landslides triggered by Quaternary tectonics in the Acambay graben,Mexico     

G. Norini  L. Capra  L. Borselli  F. R. Zuniga  L. Solari  D. Sarocchi 《地球表面变化过程与地形》2010,35(12):1445-1455

Detailed analysis was conducted on large‐scale gravitational‐tectonic deformations and landslides in the Acambay graben, an intra‐arc basin in the trans‐Mexican volcanic belt (TMVB). Field mapping and remote sensing revealed the slope instability of the northern graben boundary induced by the Acambay‐Tixmadejé fault. Two major landslides of 0·1 km³ and 0·05 km³ in volume were identified and their characteristics were analyzed according to the role of tectonics, mechanism of slope failure, and possible triggering factors. Quaternary faulting played a major role in increasing the local relief, and the activity of the Acambay‐Tixmadejé fault represents the main geomorphic factor conditioning the gravitational movements. Moreover, displacements along this fault generated sliding surfaces and reduced the strength of the rock mass. The two landslides are classified as large‐scale rotational slides involving volcanic rocks of late Miocene‐Pleistocene age. Since the Acambay graben is a seismogenic area with a known maximum horizontal ground acceleration of 0·5 g, a strong earthquake could be ascribed as the possible triggering mechanism of the landslides. Our work represents the first analysis of large gravitational slope movements in tectonically active regions in Mexico, a process that can be common in the intra‐arc basins of the TMVB, where active tectonic, seismicity, weak altered volcanic rocks, and heavy rains affect the slope stability. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   

断层气测量用于银川地堑隐伏断裂活动性的研究   总被引：1，自引：0，他引：1  

焦德成  潘祖寿  王增光  何开明  班铁 《防灾减灾学报》2012,28(3):41-47

在系统分析银川地堑活动构造、物探、地震及航卫片解译的基础上,对其内部两条主要隐伏活动断裂进行气氡、气汞测量和分析,结合地堑构造环境、地震活动性,对断层气测量结果用于隐伏断裂的活动性做出了分析。  相似文献   

太行山东缘汤阴地堑地壳结构和活动断裂探测   总被引：7，自引：1，他引：6       下载免费PDF全文

刘保金  何宏林  石金虎  冉永康  袁洪克  谭雅丽  左莹  何银娟 《地球物理学报》2012,55(10):3266-3276

采用深、浅地震反射和钻孔地质剖面相结合的探测方法,对太行山东缘汤阴地堑的地壳结构和隐伏活动断裂进行了研究.结果表明,该区地壳厚度约36~42 km,莫霍面从华北平原区向太行山下倾伏.汤阴地堑是一个受汤东断裂控制的半地堑构造,其基底面形态与莫霍面展布呈"镜像"关系.汤东断裂是1条继承性的隐伏活动断裂,该断裂向上错断了埋深约20 m的中更新世晚期地层,向下延伸至上地壳底部.综合分析深地震反射和已有深地震宽角反射/折射剖面结果,发现深地震反射剖面上的中-下地壳强反射层和壳幔过渡带反射,与深地震宽角反射/折射剖面上出现的中-下地壳正负速度梯度变化层有着较好的对应关系,这表明本区中-下地壳和壳幔过渡带可能为一系列速度递变层或高低速物质的互变层,埋深约15~16 km的强反射带为上地壳与中-下地壳的转换带,壳幔过渡带的底界为地壳与地幔的分界.研究结果为深入理解该区的深部动力学过程、分析研究深浅构造关系、评价断裂的活动性提供了依据.  相似文献