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匹配条件: “Wenchuan 8” ,找到相关结果约2477条。
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ON RESPONSE OF WELL WATER LEVEL, BODY STRAIN METER, EXTENSOMETER IN FUJIAN PROVINCE TO WENCHUAN EARTHQUAKE
福建省井水位、体应变仪与伸缩仪对汶川地震的响应分析

Chen Ying,Liu Xuyan,Zhu Shijun,Wang Lin,Chen Guang,Ni Xiaoyin,
陈莹
,刘序俨,朱石军,王林,陈光,倪晓寅

大地测量与地球动力学 , 2010,
Abstract: 在对福建井水位观测值进行格值标定的基础上,分别对井水位、体应变仪、伸缩仪对四川汶川8.0级大震的体应变响应进行了分析。结果表明,上述3种观测系统的体应变响应约为10 -7~10 -8数量级,与月亮与太阳的起潮力所引起的二阶位的半日波的体应变相当。
PRELIMINARY STUDY ON PALEOEARTHQUAKE AT BEICHUAN- DENGJIA SEGMENT ALONG THE CENTRAL FAULT OF LONGMEN MOUNTAIN
龙门山中央断裂北川-邓家一带古地震初步研究

Shi Xiang,Ran Yongkang,Chen Lichun,Wang Hu,Liu Ruichun,
史翔
,冉勇康,陈立春,王虎,刘瑞春

第四纪研究 , 2009,
Abstract: 龙门山断裂带是否存在类似汶川5.12大地震的地质记录,是地震科学工作者所关注的科学问题之一.处于中央断裂带中段和北段分界地区的北川一邓家一带,古地震研究对认识整个龙门山断裂带的大地震复发特征有重要意义.沿北川-邓家地震地表破裂带,可能有过早期活动,并兼顾是否有较多细粒第四纪沉积物,以便能较清晰地分析、判断古地震事件以及采集测年样品,所以我们在沙坝1组、和尚坪和邓家海光6组等3个地点开挖了4个探槽,并进行了断错地貌的实测,发现了该地区明显的古地震遗迹,以及该地区特殊的正断层地表破裂样式.通过探槽和实测地貌情况与前人在龙门山中央和前山断裂带的古地震研究结果的对比分析,结果显示该地区至少发生过两次地震事件(包括5.12地震事件在内),与龙门山中央和前山断裂大部分地点已揭露的古地震事件相吻合.而通过对该地区地貌侵蚀特征与地震陡坎的高度变化分析,可以得出该地区之前的地震事件与5.12地震的大小相近.
CO-SEISMIC HORIZONTAL SHORTENING ON BAISHAHE SEGMENT OF WENCHUAN EARTHQUAKE RUPTURE ZONE
汶川地震破裂带白沙河段同震水平缩短量的估算

Shi Feng,He Honglin,Wei Zhanyu,
,,何宏林 ,魏占玉

第四纪研究 , 2009,
Abstract: 同震位移向量由垂直、走滑和水平缩短(或拉张)三分量构成,合理估计各分量是全面认识地震地表变形特征的基础.汶川地震后的现场调查,获得了大量的同震位移数据,但是绝大部分是垂直和走滑两个分量,水平缩短(或拉张)分量十分缺乏,这必然导致我们对汶川地震破裂特征认识的偏差.本文通过对变形的天然地貌面和人工建筑的测量和复原,获得了白沙河破裂段8个观察点水平缩短量数据.同震水平缩短量在白沙河段的分布显示出了其由南西向北东逐渐减小的趋势,它与其他研究获得的垂直和走滑同震位移的分布基本一致.此外,同震水平缩短与同震垂直位移量在该破裂段上的分布,表现为峰、谷互补,可能暗示了地震破裂面倾角沿该破裂段的变化过程:南段为高角度,中段逐渐转变为低角度,最后在北段再次转为高角度.
PROBING ON CHARACTERISTICS AND MECHANISM OF DISASTERS CAUSED BY WENCHUAN EARTHQUAKE
汶川地震震害特点及成因探讨

Zhang Jiagui,Tang Ruimin,He Baofu,Chen Bo,
张加桂
,唐锐敏,何宝夫,陈波

第四纪研究 , 2009,
Abstract: 在对汶川、都江堰、彭州和北川等地地震灾害调查的基础上,结合大量文献资料,分析了震害特点并探讨了震害成因.认为汶川地震是在特殊的地质构造和地球动力学背景下产生的,地震震害有许多独特之处.地震产生的许多变形带是浅表层局部变形,与浅表层地质条件有关,不是地震断层,破坏性不严重.地貌在地震中有伸缩现象,其中山体部分伸展、河谷地带收缩、地貌伸缩与地震中应力释放和应变恢复过程产生的多层次滑脱有关.桥梁在地震中遭到了严重破坏,许多桥梁完全垮塌,显示架空结构建筑物对地震的抗击能力差,有的桥梁有中央断裂或垮塌一半的特点,可能是因为河流两岸地震波不连续或不同方向震动强度不同.地震中建筑物的破坏具有不均匀性,主要表现有滑坡和崩塌加重了建筑物的破坏、地基不均匀导致建筑群不均匀破坏、饱和砂土地震液化引起地基失效导致建筑群强烈破坏、斜坡带临空一侧建筑物破坏程度高、建筑物的破坏具有与地震波相关的方向性.汶川地震震害警示,在强烈地震区加强地质研究、地质灾害危险性评估、工程勘察和结合地震破坏特点的工程抗震设防的极端重要性.
Preliminary study of coseismic fault gouge occurred in the slip zone of the Wenchuan Ms 8.0 earthquake and its tectonic implications
四川汶川5.12大地震同震滑动断层泥的发现及意义

FU BiHong,WANG Ping,KONG Ping,ZHENG GuoDong,WANG Gang,SHI PiLong,
付碧宏
,王萍,孔屏,郑国东,王刚,时丕龙

岩石学报 , 2008,
Abstract: Intensive coseismic surface deformation was produced by the 12 May 2008 Wenchuan Ms 8.0 earthquake along the pre-existing NE-trending Yingxiu-Beichuan and the Guanxian-Anxian faults, in the Longmen Shan fault zone. The post-earthquake geological investigation shows that the most of surface ruptures occurred along the carbonaceous argillite, shale and coal-bearing layers, which are low-frictional layers to form slip interface within the fault zone. We found that fresh fault gouges with a thickness of 1~2 cm occurred along the co-seismic surface rupture zone, which suggests that the coseismic slip concentrated in a narrow slip zone of thickness ranging from 0.5~2 cm although the coseismic vertical and horizontal dislocations are larger than 6 meters. These fresh fault gouges within co-seismic slip zone are resulted from both thermal pressurization and frictional melting during rapid faulting movement at the shallow crust level.
STUDY ON GRAVITY CHANGE AROUND WENCHUAN Ms8.0 EARTHQUAKE RECORDED IN JI-LU-YU JUNCTION AREA
汶川8.0级地震前后冀鲁豫地区重力场变化研究

Xie Ruyi,Li Qinglin,Qin jianzeng,Zhang Ruiming,Xu Shunqiang,Feng Jianlin,
谢汝一
,李清林,秦建增,张瑞敏,徐顺强,冯建林

大地测量与地球动力学 , 2009,
Abstract: 利用冀鲁豫交界地区多期流动重力资料,研究了该区重力场在汶川8.0特大地震前后的动态变化,研究结果表明:在该强震孕震阶段,随着地震的临近,重力场在一定范围内出现了区域性的负值异常,最大值为43×10-8 s-2 ,震后整体恢复上升.
CHARACTER OF COSEISMIC VERTICAL DISPLACEMENT NEAR BEICHUAN DURING WENCHUAN Ms 8.0 EARTHQUAKE
汶川Ms8.0地震北川附近同震垂直位移特征

Dong Yunhong,Chen Changyun,
董运洪
,陈长云

大地测量与地球动力学 , 2009,
Abstract: After the Wenchuan Ms 8.0 earthquake,the First and Second Crust Monitoring and Application Centers of China Earthquake Administrator measured two first order leveling lines from Pingwu to Beichuan to Mianzhu,which is of 201.8 km,and from Guixi to Jiangyou,which is of 35.6 km,respectively.By processing and analyzing the leveling data before and after the earthquake,we calculated the coseismic vertical displacement and obtained some results as follows.1)The coseismic vertical displacement in Qingchuan fault n...
GRAVITY VARIATION AT JUNCTURE AMONG SICHUAN AND GANSU AND SHAANXI PROVINCE AFTER WENCHUANS Ms8.0 EARTHQUAKE
汶川8.0级地震后川甘陕交界地区的重力变化

Liang Weifeng,Zhu Yiqing,Liu Lian,Guo Shusong,Jiang Fengyun,
梁伟锋
,祝意青,刘练,郭树松,蒋锋云

大地测量与地球动力学 , 2009,
Abstract: 汶川8.0级大震后的2008年9—12月,川甘陕交界地区重力观测显示:四川青川县的沙洲-陕西宁强的青木川甘肃文县的碧口之间重力变化明显,重力变化达70×10-8ms-2,宁强康县间为重力变化高梯度带。望褒线重力变化活跃,靠近断裂重力变化剧烈。
Relationships between surface ruptures and lithologic characteristics of the Wenchuan Ms 8.0 earthquake
汶川8.0级地震地表破裂带与岩性关系

WANG Ping,FU Bi-Hong,ZHANG Bin,KONG Ping,WANG Gang,
王萍

地球物理学报 , 2009,
Abstract: Two co-seismic surface rupture zones, 230 km and 70 km long, are produced by the 2008 Wenchuan Ms 8.0 earthquake along the pre-existing Yingxiu-Beichuan fault and the Guanxian-Anxian fault, respectively, in the Longmen Shan fault zone. The post-earthquake geological study shows that the exposed fault planes accompanying with co-seismic scarps usually occurred along the coal seams and carbonaceous shales. In this paper we present the observed results of fault scarps and the slip surface in some typical locations along the co-seismic rupture zones. Comparing with the 1:50000 regional geological map, it shows that the distribution of the major section (the southwest part) of the Yingxiu-Beichuan co-seismic rupture zone and the Guanxian-Anxian co-seismic rupture zone are corresponding with the exposed area of the Upper Triassic Xujiahe coal-bearing strata in the Longmen Shan region. The Upper Triassic Xujiahe coal seam and the Middle-Lower Triassic and Silurian, Cambrian shales in the Longmen Shan region are the flexible rock layers, which are easy to slide and form detachment surface or detritus within the fault zone. The co-seismic rupture zone produced by the May 12 Wenchuan Ms 8.0 great earthquake resulted from a B-type sliding along the flexible rock layers in the shallow crust level.
Surface deformation in the Chengdu plain area produced by the Wenchuan MS8.0 earthquake of 12 May 2008, Sichuan, China
成都平原内汶川MS8.0级地震的地表变形

YANG Xiao-Ping,LI An,LIU Bao-Jin,FENG Shao-Ying,CHEN Xian-Cheng,SHI Jin-Hu,KOU Kun-Peng,GUO Xin-Jing,
杨晓平
,李安,刘保金,酆少英,陈献程,石金虎,寇昆朋,郭新景

地球物理学报 , 2009,
Abstract: The 12 May 2008 Wenchuan MS8.0 earthquake occurred on the Longmen Shan (Mountains) thrust-nappe structure zone in the eastern margin of the Tibetan plateau. It has produced 240 km long and 72 km long rupture zones on the surface along the Yingxiu-Beichuan fault and Guanxian-Jiangyou fault, respectively, which are branches of the Longmen Shan fault system. Besides, our field investigation found that this shock has also caused a weak rupture zone on the ground nearby the Shigu town, Shifang city that lies in the western Chengdu plain east to the epicenter. This rupture zone and the other two ruptures in the Longmen Shan mountainous area aforementioned constitute a northwest-dipping imbricate structure. It is about 7.5 km long, trends in 30°, manifested by a series of directed deformation phenomenon such as damages of buildings, channel dislocations, ground folds, erupted sand and earth fissures on the surface. Observations in the exploratory trenches indicate that there is a fold uplift of 0.2 m in the youngest strata (including the surface) produced by the Wenchuan MS8.0 event, and a fold uplift of 0.4 m in the clay bottom in the trench, presumably resulted from a paleoearthquake of similar size to the Wenchuan shock in 2008. Seismic exploration to shallow subsurface demonstrates that in the place of the Chengdu plain with the found seismic rupture zone exists active faults of the late Pleistocene as well as active folds of the Quaternary.
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