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Journal of Mountain Science 2011年第2期8卷 190-199页

作者： Laurence SVIRCHEV LI Yong YAN Liang MA Bolin HE Chengying Visiting Researcher National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu Sichuan China Royal Roads University School of Peace and Conflict Management MA Disaster and Emergency Management Program Victoria B.C. Canada National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu Sichuan China H&S Consulting Vancouver B.C. Canada

This paper examines the experiences of two mountain communities- Yinchanggou and Donghekou in the Wenchuan earthquake of May 12, 2008, where Yinchanggou's tourism economy and natural park system was destroyed and Donghekou was buried by a landslide. We conducted research surveys on both the communities, interviewing survivors and local officials, and observed the destruction/reconstruction, geological, and living conditions. We suggest that protracted educational processes be put into place so that mountain communities possess a knowledge base to consider long-term disaster prevention when building the economy in the fragile and geo-hazardous conditions of the Longmenshan. The Donghekou Earthquake Ruins Park is an exemplar of turning disaster into sustainable, safe development for small mountain villages.

关键词： Wenchuan Earthquake Geo-hazards Post-disaster reconstruction Survery

Interpreting the Coseismic Uplift and Subsidence of the Longmen Shan Foreland Basin System during the Wenchuan Earthquake by a Elastic Flexural Model

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 555-566页

作者： YAN Zhaokun LI Yong SHAO Chongjian ZHOU Rongjun YAN Liang ZHAO Guohua YAN Binglei State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (CDUT) Chengdu 610059 China Sichuan Earthquake Administration Chengdu 610041 China

The coseismic surface uplift of the Longmen Shan（LMS） created an instantaneous topographic load over the western margin of the Sichuan Basin, where surface subsidence, decreasing eastward, has been measured using several methods, such as GPS, SAR and levelling. Using an elastic flexural model, we aim to interpret the coseismic surface uplift and subsidence, and constrain the effective lithospheric elastic thickness（Te） of the Sichuan Basin. Using different effective elastic thickness values for the Sichuan Basin, a series of subsidence curves were computed by the elastic flexure model equation for a broken elastic plate. The curves, produced by models using an effective elastic thickness of 30–40 km, provided the best fit to the general pattern of observed coseismic subsidence of the Sichuan Basin. However, the calculated subsidence（-40–70 cm） at the front of the LMS is evidently lower than the observed values（-100 cm）, suggesting that the effective elastic thickness therein should be lower. These results indicate that the lithospheric strength may decrease westward from the Sichuan Basin to the LMS.

关键词： flexural model Longmen Shan Wenchuan Earthquake coseismic uplift and subsidence foreland basin system

Episodic Orogeny Deduced from Coeval Sedimentary Sequences in the Foreland Basin and Its Implication for Uplift Process of Longmen Mountain,China

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Journal of Mountain Science 2013年第1期10卷 29-42页

作者： LI Yong SU De-chen ZHOU Rong-jun LI Hai-bing Alexander L.DENSMORE YAN Liang YAN Zhao-kun State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Institute of Geology Chinese Academy of Geological Science Institute of Earthquake Engineering Seismological Bureau of Sichuan Province Institute of Hazard and Risk Research and Department of Geography Durham University

Longmen Mountain located at the boundary between the Sichuan Basin and Tibetan Plateau,representing the steepest gradient of any edges of the *** endmember models of uplift process and mechanism have been proposed,including crustal thickening,crustal flow,and crustal isostatic *** we use coeval sedimentary sequences in the foreland basin to restraint uplift process and mechanism in the Longmen *** more than 10,000 m thick Late TriassicQuaternary strata filled in this foreland basin and can be divided into six megasequences that are distinguished as two distinct *** first type is the wedge-shaped megasequences which are sedimentary response of strong active thrust loading events,characterized by a high rate of subsidence and sediment accumulation,coarsening-upward succession and a dual-sourced sediment *** type includes Late Triassic,Late Jurassic to Early Cretaceous and Late Cretaceous to Paleogene *** second type is the tabular megasequences,characterized by the low rate of subsidence and sediment accumulation,finingupward succession,and a single-sourced sediment supply,which is sedimentary response of isostatic rebound and erosion *** type includes the Early to Middle Jurassic,Middle Cretaceous and Neogene to Quaternary *** on sedimentary,active tectonic,geomorphic evidence,we infer that the direction has been reversed from SSWdirected sinistral strike-slip to NNE-directed dextral strike-slip during 40-3.6 Ma,and since 3.6 Ma,the Longmen Mountain thrust belt belong to times of isostatic rebound and erosional unloading with NNEdirected dextral *** suggests that crustal isostatic rebound is a primary driver for uplift and topography of the present Longmen *** Wenchuan(Ms8.0) earthquake,which ruptured a large thrust fault with NNE-directed dextral strikeslip along the range front,is an active manifestation of this crustal isostatic rebound process with dextral st

关键词： Wedge-shaped megasequence Tabular megasequence Orogenic loading Erosional unloading Uplift process Longmen Mountain Foreland basin

Crustal Uplift in the Longmen Shan Mountains Revealed by Isostatic Gravity Anomalies along the Eastern Margin of the Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2018年第1期92卷 56-73页

作者： LI Yong YAN Zhaokun ZHOU Rongjun YAN Liang DONG Shunli SHAO Chongjian Svirchev LAURENCE State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu 610059 Sichuan China Institute of Earthquake Engineering Seismological Bureau of Sichuan Province 610041 Sichuan China

This study examines the relationship between high positive isostatic gravity anomalies （IGA）, steep topography and lower crustal extrusion at the eastern margin of the Tibetan Plateau. IGA data has revealed uplift and extrusion of lower crustal flow in the Longmen Shan Mountains （the LMS）. Firstly, The high positive IGA zone corresponds to the LMS orogenic belt. It is shown that abrupt changes in IGA correspond to zones of abrupt change of topography, crustal thickness and rock density along the LMS. Secondly, on the basis of the Airy isostasy theory, simulations and inversions of the positive IGA were conducted using three-dimensional bodies. The results indicated that the LMS lacks a mountain root, and that the top surface of the lower crust has been elevated by 11 km, leading to positive IGA, tectonic load and density load. Thirdly, according to Watts＇s flexural isostasy model, elastic deflection occurs, suggesting that the limited （i.e. narrow） tectonic and density load driven by lower crustal flow in the LMS have led to asymmetric flexural subsidence in the foreland basin and lifting of the forebulge. Finally, based on the correspondence between zones of extremely high positive IGA and the presence of the Precambrian Pengguan-Baoxing complexes in the LMS, the first appearance of erosion gravels from the complexes in the Dayi Conglomerate layer of the Chengdu Basin suggest that positive IGA and lower crustal flow in the LMS took place at 3.6 Ma or slightly earlier.

关键词： isostatic gravity anomalies crustal uplift Longmen Shan Mountains lower crustal flow,foreland basin the eastern margin of the Tibetan Plateau

Tectonic Mechanism of the Suining(Ms5.0) Earthquake,Center of Sichuan Basin,China

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Journal of Mountain Science 2013年第1期10卷 84-94页

作者： ZHOU Rong-jun LI Yong Laurence SVIRCHEV ZHANG Yong-jiu HE Deng-fa HE Yu-lin ZHAO Pei-lin WANG Zan-jun LONG Feng SU Jin-rong WANG Shi-yuan LIANG Ming-jian LIU Yu-fa KANG Chuan-chuan Earthquake Administration of Sichuan Province National Key Laboratory of Oil and Gas Reservoir Geologyand Exploitation Chengdu University of Technology Royal Roads University School of Peace and Conflict Management China University of Geoscience Earthquake Administration of Chongqing Municipality

On Jan.31 of 2010,the Suining earthquake occurred at Suining City whch is located the center of Sichuan *** is unusual for the strong earthquake to occur at the center of Sichuan Basin with a stable geotectonic environment and a low-level historical *** macro-epicenter of the earthquake is located at Moxi town of Suining city,Sichuan province,*** earthquake intensity of the epicenter area is degree VII,and the long axis of the isoseismal line trends in NE *** Suining earthquake caused the collapse or destruction of 460 family *** earthquake focal mechanism solution and records of the near-field seismographic stations showed the earthquake occurred at the reverse fault at a depth 34 *** on the waveform and focal mechanism,we consider the Suning earthquake is triggered by the reverse fault and not by the gravitational collapse or man-made explosive *** on seismic refraction profile and borehole,we consider that the earthquake is triggered by the backthrust fault of Moxi anticline rooted in detachments at a depth 3-4 ***,we infer that tectonic mechanism of the Suining(Ms5.0) Earthquake is driven by the horizontal crustal shortening and stress adjustment on a shallow detachment after the Wenchuan(Ms 8.0) earthquake.

关键词： Suining(Ms5.0) earthquake Disaster Tectonic mechanism Horizontal crustal shortening Backthrust fault Shallow detachment Sichuan Basin

The Coupling Relationship between the Uplift of Longmen Shan and the Subsidence of Foreland Basin,Sichuan,China

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Acta Geologica Sinica(English Edition) 2017年第2期91卷 379-395页

作者： LI Yong YAN Liang SHAO Chongjian WANG Zhengjiang YAN Zhaokun YU Qian ZHOU Rongjun LI Haibin State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation Ministry of Landand ResourcesCollege of Earth SciencesChengdu University of TechnologyChengdu 610059China Chengdu Center China Geological SurveyChengdu 610081China Institute of Earthquake Engineering Seismological Bureau of Sichuan ProvinceChengdu 610041China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

Depending on the analysis of the coeval sedimentary geometry and subsidence mechanism in the Longmen Shan foreland basin, three models about the coupling relationship between Longmen Shan uplift and foreland basin subsidence since the Indosinian have been proposed：（1） crustal shortening and its related wide wedge-shaped foreland basin,（2） crustal isostatic rebound and its related tabular foreland basin, and（3） lower crustal flow and its related narrow wedge-shaped foreland basin. Based on the narrow wedge-shaped foreland basin developed since 4 Ma, it is believed that the narrow crustal shortening and tectonic load driven by lower crustal flow is a primary driver for the present Longmen Shan uplift and the Wenchuan（Ms 8.0） earthquake.

关键词： coupling relationship foreland basin subsidence Longmen Shan uplift eastern margin of Tibetan Plateau Sichuan China Proto-Tethys

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汶川8.0级地震的基本特征及其研究进展

四川大学学报（工程科学版） 2009年第3期41卷 7-25页

作者：李勇黄润秋 DENSMORE Alexander L. 周荣军曹叔尤成都理工大学油气藏地质及开发工程国家重点实验室四川成都610059 成都理工大学地质灾害防治国家重点实验室四川成都610059 Inst. of Hazard and Risk Research and Dept. of Geography Durham Univ. Durham UK 四川省地震局工程地震研究院四川成都610041 四川大学水力学与山区河流动力学国家重点实验室四川成都610065

2008年5月12日在龙门山发生的汶川8.0级特大地震属于逆冲—走滑型地震。为了尽快和最好地利用汶川地震的资料,推动地震地质科学的研究。在论述了汶川地震科学研究的基本现状和研究进展的基础上,重点讨论了龙门山地震带的地质背景、活动... 详细信息

2008年5月12日在龙门山发生的汶川8.0级特大地震属于逆冲—走滑型地震。为了尽快和最好地利用汶川地震的资料,推动地震地质科学的研究。在论述了汶川地震科学研究的基本现状和研究进展的基础上,重点讨论了龙门山地震带的地质背景、活动构造、汶川地震的基本特征、地表破裂及组合样式、历史强地震复发周期、观测数据的积累与整合、构造运动学和动力学机制、地质灾害和灾后重建、龙门山地区未来地震的预测和预报等方面的内容。并建议从汶川大地震中汲取教训,整合地质学、地球物理和地球化学等多学科的综合研究,探讨汶川地震的形成过程和机制,以有效地减轻和逐步避免今后可能发生的类似的灾难。

关键词：汶川地震地表破裂历史地震活动构造地质灾害地震复发周期预测预报龙门山地震带青藏高原东缘

岷江上游水系对龙门山断裂带右旋走滑作用的响应

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山地学报 2013年第2期31卷 211-217页

作者：陈浩李勇绵阳师范学院资源环境工程学院成都理工大学油气藏地质及开发工程国家重点实验室

汶川8.0级特大地震是岷江上游流域最新一次区域构造活动,在此次地震中,岷江河道因北川-映秀断裂北西盘的右旋走滑作用而被水平错动0.8±0.2 m,岷江河道南西方向的河流阶地也被同步位错0.6±0.1 m。切过龙门山主干断裂的岷江上游干、支... 详细信息

汶川8.0级特大地震是岷江上游流域最新一次区域构造活动,在此次地震中,岷江河道因北川-映秀断裂北西盘的右旋走滑作用而被水平错动0.8±0.2 m,岷江河道南西方向的河流阶地也被同步位错0.6±0.1 m。切过龙门山主干断裂的岷江上游干、支流水系因若干次历史地震驱动的走滑作用而发生同步弯曲。根据水系水平扭错量和岷江干、支流初始形成时间计算可知,穿越岷江支流河道的汶川-茂县断裂右旋走滑速率为1～1.4 mm/a,切过岷江干流河道的北川-映秀断裂和彭县-灌县断裂右旋滑动速率分别为0.94 mm/a和0.71 mm/a。计算结果表明,龙门山各主干断裂右旋走滑作用有自北西向南东减弱的趋势。

关键词：岷江上游龙门山断裂带右旋走滑响应

岷江上游河流阶地对龙门山断裂带逆冲作用的响应

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山地学报 2014年第5期32卷 535-540页

作者：陈浩李勇绵阳师范学院资源环境工程学院成都理工大学油气藏地质及开发工程国家重点实验室

汶川地震导致的岷江阶地面垂直错动量,记录了在地震这一突变性构造活动作用下水系的瞬时变化情况。震后野外实测数据表明,切过北川-映秀断裂的岷江阶地面,因断裂北西盘的逆冲作用产生了2.7 m的累积垂直位错量。若干次历史地震驱动的逆... 详细信息

汶川地震导致的岷江阶地面垂直错动量,记录了在地震这一突变性构造活动作用下水系的瞬时变化情况。震后野外实测数据表明,切过北川-映秀断裂的岷江阶地面,因断裂北西盘的逆冲作用产生了2.7 m的累积垂直位错量。若干次历史地震驱动的逆冲作用使切过龙门山主干断裂的岷江阶地面被大尺度垂直错断,根据阶面垂直扭错量和相应测年值计算可知,汶川-茂县断裂、北川-映秀断裂、彭县-灌县断裂晚第四纪以来逆冲速率分别为0.84 mm/a、0.52 mm/a和0.24 mm/a,计算结果表明,龙门山各主干断裂逆冲作用有自北西向南东减弱的趋势。龙门山各主干断裂的差异活动不仅使被断裂切过的岷江阶地面产生不同尺度的垂直变形,而且使汶川-茂县断裂和北川-映秀断裂所夹持的后龙门山地区的抬升速率和抬升幅度,大于北川-映秀断裂和彭县-灌县断裂所夹持的前龙门山地区。

关键词：岷江上游河流阶地龙门山断裂带逆冲作用

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龙门山北段平通河流域地貌演化过程

山地学报 2012年第2期30卷 136-146页

作者：颜照坤李勇黄润秋李奋生闫亮赵国华张自力张威 Densmore A L Hilton R G 油气藏地质及开发工程国家重点实验室(成都理工大学) 地质灾害防治与地质环境保护国家重点实验室(成都理工大学) Inst.of Hazard and Risk Research and Dept.of Geography Durham Univ.Durham DH1 3LEUK

龙门山位于青藏高原东缘,是青藏高原周缘山脉中陡度变化最大的山脉,也是全球气候和构造活动最为强烈的地区之一,因此成为研究构造、气候如何影响山脉地貌演化过程这一科学问题的良好素材。在位于龙门山北段的平通河流域,汶川地震导致该... 详细信息

龙门山位于青藏高原东缘,是青藏高原周缘山脉中陡度变化最大的山脉,也是全球气候和构造活动最为强烈的地区之一,因此成为研究构造、气候如何影响山脉地貌演化过程这一科学问题的良好素材。在位于龙门山北段的平通河流域,汶川地震导致该区强烈的隆升、剥蚀作用,对研究该区地貌演化过程具有重要的启示意义。通过对平通河流域基于DEM数据的地形坡度、水系分布、河流发育程度等的分析,并综合研究区构造特征和岩性特征,获得该流域不同区域的地貌演化方向,其中两个区域的地貌演化最为剧烈:1.平通河流域位于北川-映秀断裂和彭灌断裂之间的地区,未来将发生较快的隆升,地貌向高、陡的方向演化,河流下切作用使河谷两岸形成更加陡峭的地形;2.在北川-映秀断裂上盘附近地区,在构造和气候作用下侵蚀、搬运作用强烈,山体将被快速剥蚀削低,但在河谷两岸也会形成更加陡峭的地形。

关键词：龙门山平通河流域地貌演化构造气候