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Intricate Fault Systems in Longmenshan Structural Belt's Northern End: Exploring Structural Evolution and Seismic Rupture Behavior in the Eastern Tibetan Plateau

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Journal of Earth Science 2024年

作者： Hanyu Huang renqi lu Dengfa He Jinliang Gao Weikang Zhang Lingyu Kang State Key Laboratory of Earthquake Dynamics， Institute of Geology China Earthquake Administration State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Institute of Sedimentary Geology， Chengdu University of Technology College of Energy Resources， China University of Geosciences PetroChina Research Institute of Petroleum Exploration and Development

The Longmenshan Structural Belt on the eastern edge of the Tibetan Plateau experienced the impactful Mw 7.9 2008 Wenchuan earthquake， causing a 350 km surface rupture. Traditional models attribute this to the Beichuan and Pengguan faults， but our research reveals a complex fault system at the northern end， with inconsistencies in surface rupture， aftershock distribution， and focal mechanisms. We integrates shallow geology， active source seismic reflection， and magnetotelluric profiling to establish a deep structural model for the northern end of the Longmenshan Structural Belt. This area exhibits dominant reverse thrust nappe tectonics， and analyzing the tectonic evolution history provides insights into deformation propagation from the orogenic belt toward the Sichuan Basin. Focal mechanism analysis and relocated aftershock data reveals two distinct types of seismogenic structures in the northern end of the Longmenshan Structural Belt. In the middle to northern segments， the reverse fault type is attributed to reactivated pre-existing faults. Conversely， at the northern end， the strike-slip fault type originates from high-angle co-seismic rupture cutting through pre-existing reverse faults. This study enhances our understanding of fault complexity and seismic mechanisms in the northeastern Longmenshan Structural Belt， providing new insights into regional tectonics.

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3-D geologic architecture of Xiong＇an New Area： Constraints from seismic reflection data

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Science China Earth Sciences 2018年第8期61卷 1007-1022页

作者： Dengfa HE Shuaiqiang SHAN Yuying ZHANG renqi lu Ruifeng ZHANG Yongqian CUI School of Energy Resources China University of Geosciences Beijing 100083 China Institute of Geology China Earthquake Administration Beijing 100029 China PetroChina Huabei Oilfield Company Renqiu 062552 China

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.

关键词： Geologic architecture Tectono-stratigraphic sequence Fault system Crustal stability Xiong'an New Area

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The Seismogenic Structure of the 2010 Suining Ms 5.0 Earthquake and its Geometry,Kinematics and Dynamics Analysis

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Acta Geologica Sinica(English Edition) 2011年第6期85卷 1277-1285页

作者： lu renqi HE Dengfa JOHN Suppe MA Yongsheng GUAN Shuwei SUN Yanpeng GAO Jinwei Institute of Oil and Gas School of Earth and Space Sciences Peking University Beijing 100871 China College of Energy Resources China University ofGeosciences Beijing 100083 China The Department ofGeosciences TaiWan University. TaiPei 13-318 China Oil fieldExploration Production Department SINOPEC Beijing 100728 China Research Institute of Petroleum and Development of China Beijing 100083 China

In January 2010, the Suining Ms5.0 earthquake occurred in central Sichuan Basin, with the epicenter in Moxi-Longnvsi structural belt and a focal depth of 10 km. Based on structural interpretations of seismic profiles in this area, we recognized a regional detachment fault located at a depth of 9-10 km in the Presinian basement of the Suining area, transferring its slipping from NW to SE orientation. This detachment fault slipped from NW to SE, and underwent several shears and bends, which caused the basement to be rolled in and the overlaying strata fold deformation. It formed a fault-bend fold in the Moxi area with an approximate slip of 4 km. Correspondingly, the formation of the Moxi anticline is related to the detachment fault. With the earthquake＇s epicenter on the ramp of the detachment fault, there is a new point of view that the Suining earthquake was caused by re-activation of this basement detachment fault. Since the Late Jurassic period, under the influence of regional tectonic stress, the detachment fault transfered its slip from the Longmen Mountains （LMS） thrust belt to the hinterland of the Sichuan Basin, and finally to the piedmont zone of southwest Huayingshan （HYS）, which indicates that HYS might be the final front area of the LMS thrust belt.

关键词： Suining Ms5.0 earthquake Seismic interpretation Detachment fault Moxi anticline Longmen Mountains Sichuan Basin

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Tectonic and geological setting of the earthquake hazards in the Changning shale gas development zone, Sichuan Basin, SW China

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Petroleum Exploration and Development 2019年第5期46卷 1051-1064页

作者： HE Dengfa lu renqi HUANG Hanyu WANG Xiaoshan JIANG Hua ZHANG Weikang China University of Geosciences Beijing 100083China Institute of Geology China Earthquake AdministrationBeijing 100045China Hebei Earthquake Agency Shijiazhuang 050021China Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China

Hydraulic fracturing is a key technology in shale gas extraction,whether hydraulic fracturing induces earthquakes has become a hot topic in the public and the focus of scholars’*** urgency of shale gas mining and the catastrophic nature of earthquakes highlight the urgent need to study this *** Changning anticline at the southern margin of the Sichuan Basin is a key area for shale gas *** this as an example,this paper applies the velocity model of the study area to reposition the M5.7 magnitude earthquake on December 16,2018 and the M5.3 magnitude earthquake on January 03,2019 and their aftershock sequence in this *** shale gas exploration drilling and reflection seismic data to carry out structural analysis,and recovering the tectonic geological setting of earthquake occurrence by restoring the formation process of the Changning anticline,to further explore the seismic *** results show that the Changning anticline is a large basement fault-bend fold,and the displacement of the fault forming the anticline is 18 km,and the Changning anticline absorbs 33%of the fault *** Silurian Longmaxi Formation of the Changning anticline experienced larger-parallel shearing along underlying basement faults,forming a micro-fracture *** footwall ramp of the basement fault is reactivated at present,earthquakes in this area mostly occur along the footwall ramp of the basement fault and above and below *** anticlinal and synclinal hinge zones are also the earthquake concentration areas,but the earthquake magnitude decreases upwards along the kink-band,and small earthquakes below M2.0 occur in the Silurian Longmaxi *** far,the earthquake in the Changning anticline mainly occurred in the southern limb of the anticline,which is a natural earthquake formed along the footwall ramp of the basement *** earthquakes in the Changning area are possible related to the geo-tectonic setting for the southeast outward compre

关键词： earthquake hazards shale gas exploration shale gas production hydraulic fracturing fluid overpressure structural deformation Changning anticline Sichuan Basin

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High-resolution velocity structure and seismogenic potential of strong earthquakes in the Bamei-Kangding segment of the Xianshuihe fault zone

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中国科学:地球科学英文版 2023年第9期66卷 1960-1978页

作者： Yan ZHAO Junlun LI Jian XU Huajian YAO Gaohua ZHU Hongfeng YANG Jinyu ZHANG renqi lu Laboratory of Seismology and Physics of the Earth’s Interior School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology Hefei 230026China Key Laboratory of Marine Geology and Environment CASQingdao 266071China Earth System Science Programme Faculty of ScienceThe Chinese University of Hong KongHong Kong 999077China State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China

On September 5,2022,a strong MS6.8 earthquake struck the luding area in the Kangding-Moxi segment of the Xianshuihe fault zone,which is the northern boundary of the Sichuan-Yunnan rhombic block,causing considerable *** Bamei-Kangding segment of the Xianshuihe fault zone,which is located only tens of kilometers away from the luding earthquake,has hosted frequent moderate to strong earthquakes in history and is a dangerous earthquake-prone ***,it is critical to investigate the regional seismogenic environment for strong earthquakes and to evaluate the impact of the luding earthquake in this *** this purpose,we deployed a dense seismic array comprising over 200 short-period nodes in this region from July to August,2022 and acquired seismic ambient noise for over 30 *** the collected data,we conducted surface wave tomography and obtained a high-resolution 3-D shear wave velocity model for the regional shallow crust down to 8 km in *** key findings include:(1)the Bamei-Kangding segment of the Xianshuihe fault zone exhibits widespread stripped lowvelocity anomalies,suggesting shear movements at a relatively high temperature of the Xianshuihe fault zone;the Zheduoshan granitic pluton situated between the Zheduotang and southern Selaha faults shows a distinct low-velocity anomaly,which may be attributed to the localized high-temperature anomaly resulted by a deep magmatic heat source and the recent rapid uplift of the Zheduoshan area;(2)a ten-kilometer-wide high velocity body found below 4 km in depth near the Zhonggu area in the Bamei segment coincides with the seismic gap of moderate to strong earthquakes in this region,suggesting that the high velocity body may act as a seismic barrier;(3)the heterogeneity of the velocity structure along the Bamei-Kangding segment of the Xianshuihe fault zone corresponds to the regional changes in temperature,which reveals the reason for the spatially varying seismogenic potential in this segment;e

关键词： Xianshuihe fault zone Bamei-Kangding segment luding earthquake Dense-array ambient noise tomography Seismogenic environment for moderate to strong earthquakes

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An NGO Providing Services to Your Need——China Machinery Industry Federation

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China's Foreign Trade 2006年第8期 19-20页

作者： Madame lu renqi Vice President CMIF

Since 1979, along with the imple mentation of economic reform and opening policy, China has attained miraculous high-speed development. In the recent twenty-some years, the Chinese Non-Government Organizations (NGOs) have shot up like bamboo shoots after the spring rain. They are playing a more and more important role in promoting economic and

关键词：中国机械工业联合会行业组织职能成员贸易

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鄂尔多斯盆地伊盟隆起上古生界天然气成藏条件

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石油勘探与开发 2011年第1期38卷 30-39页

作者：王明健何登发包洪平鲁人齐桂宝玲中国地质大学(北京)能源学院海相储集层演化与油气富集机理教育部重点实验室中国石油长庆油田勘探开发研究院

利用含油气系统的概念与方法研究伊盟隆起上古生界天然气成藏要素及成藏作用,总结其成藏模式。伊盟隆起上古生界天然气主要来自隆起南部及乌审旗地区的太原组和山西组烃源岩;山西组和下石盒子组冲积扇相辫状水道砂体、河流相河道砂坝砂... 详细信息

利用含油气系统的概念与方法研究伊盟隆起上古生界天然气成藏要素及成藏作用,总结其成藏模式。伊盟隆起上古生界天然气主要来自隆起南部及乌审旗地区的太原组和山西组烃源岩;山西组和下石盒子组冲积扇相辫状水道砂体、河流相河道砂坝砂体及三角洲平原亚相分流河道砂体为最有利储集层;上石盒子组和石千峰组厚层泥岩构成区域性盖层,另有众多局部盖层;生、储、盖层具有良好的组合关系,形成自生自储式(隆起南部)和下生上储式(隆起南部、北部)生储盖组合。天然气主要通过优势输导砂体、不整合面、断层和裂缝组成的输导体系向北部运移;隆起北部地区以局部构造圈闭、远源成藏为主,而南部地区以岩性圈闭、近源成藏为主。

关键词：伊盟隆起上古生界成藏地质要素运移圈闭成藏模式

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Assessment of strong earthquake risk in the Chinese mainland from 2021 to 2030

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Earthquake Research Advances 2023年第1期3卷 81-91页

作者： Zhigang Shao Yanqiang Wu Lingyun Ji Faqi Diao Fuqiang Shi Yujiang Li Feng Long Hui Zhang Wuxing Wang Wenxin Wei Peng Wang Xiaoxia Liu Qi Liu Zhengyang Pan Xiaofei Yin Yue Liu Wei Feng Zhenyu Zou Jia Cheng renqi lu Yueren Xu Xi Li Institute of Earthquake Forecasting China Earthquake AdministrationKey Laboratory of Earthquake ForecastingBeijing100036China The First Monitoring and Application Center China Earthquake AdministrationTianjin300180China The Second Monitoring and Application Center China Earthquake AdministrationXi'an710054China China University of Geosciences(Wuhan) Wuhan430074China Shaanxi Earthquake Agency Xi'an710068China National Institute of Natural Hazards Beijing100085China Sichuan Earthquake Administration Chengdu610044China Gansu Earthquake Agency Lanzhou730000China Institute of Geology China Earthquake AdministrationBeijing100029China Yunnan University Kunming650091China

The long-term earthquake prediction from 2021 to 2030 is carried out by researching the active tectonic block boundary zones in the Chinese *** on the strong earthquake recurrence model,the cumulative probability of each target fault in the next 10 years is given by the recurrence period and elapsed time of each fault,which are adopted from relevant studies such as seismological geology,geodesy,and historical earthquake *** on the long-term predictions of large earthquakes throughout the world,this paper proposes a comprehensive judgment scheme based on the fault segments with the seismic gap,motion strongly locked,sparse small-moderate earthquakes,and apparent Coulomb stress *** paper presents a comprehensive analysis of the relative risk for strong earthquakes that may occur in the coming 10 years on the major faults in the active tectonic block boundary zones in the Chinese *** present loading rate of each fault is first constrained by geodetic observations;the cumulative displacement of each fault is then estimated by the elapsed time since the most recent strong earthquake.

关键词： Long-term earthquake prediction Chinese mainland Active tectonic block

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渤海湾盆地临清坳陷东部边界断裂——兰聊断层几何学、形成演化与成因机制

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地质科学 2011年第3期46卷 775-786页

作者：王明健何登发李文涛鲁人齐桂宝玲中国地质大学能源学院北京100083 胜利油田地质科学研究院山东东营257015

充分利用钻井、测井、分层和地震资料,并结合区域地质背景和前人研究成果对临清坳陷东部地区地震资料进行了详细解释,以此为基础对临清坳陷东部边界—兰聊断层的几何学特征、形成演化及其形成的动力学背景进行了深入分析。研究认为:兰... 详细信息

充分利用钻井、测井、分层和地震资料,并结合区域地质背景和前人研究成果对临清坳陷东部地区地震资料进行了详细解释,以此为基础对临清坳陷东部边界—兰聊断层的几何学特征、形成演化及其形成的动力学背景进行了深入分析。研究认为:兰聊断层为—上陡下缓的铲式正断层,在基底发生滑脱;兰聊断层具有多期活动的特征,不同构造阶段断层性质不同;兰聊断层活动具有分段性,南段从J_3—K_1开始活动,而北段则是从Ek-Es_4开始活动;兰聊断层的形成演化主要受华北板块与其周围板块的相互运动所控制,其中伊泽奈岐板块和太平洋板块向欧亚板块俯冲运动导致岩石圈发生拆沉作用,并引起地幔上涌,由此所产生的水平拉张应力场是控制兰聊断层形成演化的根本原因。

关键词：临清坳陷东部兰聊断层演化成因机制

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渤海湾盆地廊固凹陷杨税务潜山带地质结构与构造演化

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地质科学 2023年第1期58卷 226-239页

作者：刘冠伸何登发鲁人齐张煜颖单帅强中国地震局地质研究所北京100029 中国地质大学(北京)能源学院北京100083 中国石化勘探分公司成都610041 中国石化石油勘探开发研究院无锡石油地质研究所江苏无锡214126

杨税务潜山带位于渤海湾盆地廊固凹陷东部的河西务构造带内,整体呈NE向展布,由3个平行斜列的潜山组成,属于典型的断块掀斜型潜山,经历多次构造运动的改造作用,地质结构复杂。目前对杨税务潜山带形成演化过程研究程度较低,因而厘定杨税... 详细信息

杨税务潜山带位于渤海湾盆地廊固凹陷东部的河西务构造带内,整体呈NE向展布,由3个平行斜列的潜山组成,属于典型的断块掀斜型潜山,经历多次构造运动的改造作用,地质结构复杂。目前对杨税务潜山带形成演化过程研究程度较低,因而厘定杨税务潜山带的构造演化阶段有助于分析构造对油气运移、储层改造以及油气成藏的控制作用,为后续进一步明确有利勘探方向奠定基础。本次研究通过研究区内的钻井和地震资料,对杨税务潜山带的断层发育、构造层的划分进行了详细研究;运用平衡剖面技术揭示了杨税务潜山带的构造演化过程。结果表明,研究区共发育6套构造层,即:基底构造层、中—新元古界构造层、下古生界构造层、石炭—二叠系构造层、古近系构造层和新近系—第四系构造层。构造演化分析结果表明:印支期,在SN向挤压应力的作用下,杨税务地区形成了近EW向的古隆起;燕山运动中,古隆起发生旋转并抬升遭受剥蚀;在喜马拉雅期发生构造反转,大兴断层的强烈活动使廊固凹陷进入断陷阶段,随着河西务断层的发育,古隆起被分割为杨税务潜山和泗村店潜山两部分,位于下盘的杨税务潜山被拉断成如今3个潜山平行斜列的潜山带。本次对杨税务潜山带地质结构、构造演化以及构造的控藏作用的研究,为后续类似隐蔽型潜山油气藏研究提供了案例与参考。

关键词：地质结构构造层构造演化杨税务潜山带冀中凹陷

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