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High-resolution crustal velocity structure in the Shanxi rift zone and its tectonic implications

Science China Earth Sciences 2021年第5期64卷 728-743页

作者： Liting DOU Huajian YAO Lihua FANG song LUO meiqin song Xiaomei YAN Cheng CHENG Shanxi Earthquake Administration Taiyuan 030021China 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 ChinaMengcheng 233500China CAS Center for Excellence in Comparative Planetology University of Science and Technology of ChinaHefei 230026China Institute of Geophysics China Earthquake AdministrationBeijing 100081China

The Shanxi rift zone,located in the Trans-North China Orogen(TNCO)of the North China Craton(NCC),is wellknown for hosting large intraplate earthquakes in continental *** TNCO is a suture zone formed by the amalgamation of the eastern and the western blocks of the *** its formation,it was reactived and deformed by later tectonic activities,which result in complex lithospheric ***,the detailed crustal structure of the Shanxi rift zone is critical for understanding the tectonics and seismogenic mechanism in this area,which will shed new lights on the formation and dynamic evolution of the *** this study,we applied ambient noise tomography based on 18 months continuous records from 108 seismic stations located in Shanxi and its surroundings,in order to constrain its detailed crustal *** measured 4437 Rayleigh wave phase velocity dispersion curves in the period of 5–45 s from the cross-correlation ***,a surface wave direct inversion algorithm based on surface-wave ray tracing was used to resolve a 3-D S-wave velocity model in the upper 60 km with lateral resolution of~50–80 *** tomographic images show that the sedimentary thickness of the Taiyuan Basin is less than 5 *** depth of 0–10 km,we observe a good correlation between the imaged structural variations with geological and topographic features at the *** example,the center of rift shows low-velocity anomalies and the uplifting areas on both sides are characterized by high velocity *** western and eastern boundaries of the slow materials coincide with the faults that control the *** slow material extends from the shallow surface to depth of about 15 km but it getting smaller in shape at deeper *** the Taiyuan Basin,Linfen Basin,and Yuncheng Basin in the central and southern parts,the structure is dominant by slow materials in the upper crust but changes to strong high-velocity anomalies in the lower crust and the uppermost mantle at

关键词： Shanxi rift zone Ambient noise tomography S-wave velocity structure Magmatic underplating Earthquake distribution

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Determination of the crustal structure and seismicity of the Linfen rift with S-wave velocity mapping

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Frontiers of Earth Science 2020年第3期14卷 647-659页

作者： Zigen Wei Risheng Chu meiqin song Xiaolin Yang Shanshan Wu Feng Bao State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China Earthquake Administration of Shanxi Province Taiyuan030021China Shaanxi Earthquake Agency Xi’an710068China Shanghai Earthquake Agency Shanghai200062China

The Linfen rift is a Cenozoic extensional rift with significant seismicity and seismic *** of this rift shed light on deep dynamic processes and seismogenic mechanisms relevant to crustal structure and seismic *** first conducted a joint inversion of receiver functions and surface wave dispersion on waveform data collected from 27 broadband seismic stations to image the crustal S-wave velocity in the Linfen rift and its *** then relocated the source parameters for 10 earthquake events with depths>20 km and studied the relationship between crustal S-wave velocity and *** results show that low-velocity zones of different scales exist in the middle-lower crust,and that the depth of the seismogenic layer gradually increases from^25 km in the south to^34 km in the north,roughly corresponding to the bottom of the low-velocity *** found that most of the relocated earthquakes occurred in the low-velocity zone at depths of 18 km to 34 km,with the deepest at 32 *** of the greatest historic earthquakes,Linfen(Ms 7.75)in 1695 and Hongtong(Ms 8.0)in 1303,occurred at the bottom of the high-velocity zone at depths of 12 km to 18 *** results,combined with previous studies,suggest that the upwelling mantle material below the rift did not remarkably affect the velocity structure from the bottom of the seismogenic layer down to the uppermost mantle nor heat the *** is likely that neither crustal-scale faults nor mantle earthquakes exist in the Linfen rift.

关键词： Linfen rift joint inversion S-wave velocity seismogenic layer deep crustal earthquake

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Electrodeposition in organic system and properties of NiO electrochromic films

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Science China(Technological Sciences) 2012年第6期55卷 1545-1550页

作者： SU Ge song meiqin SUN WuZhu CAO LiXin LIU Wei MA DeWen CHEN Na ZHAO LiLi WANG Jing LIU XiaoYun Institute of Material Science and Engineering Ocean University of China Qingdao 266100 China

By electrodeposition in organic system,NiO films with reversible electrochromic property were ***-doped tin oxide glass slices were used as substrates,*** voltammetry and ultraviolet-visible transmission spectroscopy were adopted to study the electrochromic properties of the *** resolution transmission electron microscopy(HRTEM) was employed to analyze the composition and structure of the *** is found that the films are composed of fine NiO crystal grains of a few nanometers in diameter,endowing them with large visible light transmittance variation,rapid switch rate(*** response time) between the bleached and colored *** cycling durability reached 6000 cycles.

关键词： NiO film electrodeposition in organic system electrochromic properties

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Preliminary analysis on the source properties and seismogenic structure of the 2017 M_s7.0 Jiuzhaigou earthquake

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Science China Earth Sciences 2018年第3期61卷 339-352页

作者： Zujun XIE Yong ZHENG Huajian YAO Lihua FANG Yong ZHANG Chengli LIU Maomao WANG Bin SHAN Huiping ZHANG Junjie REN Lingyun JI meiqin song Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and Geomatics China University of Geosciences State Key Laboratory of Geodesy and Earth's Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences Laboratory of Seismology and Physics of Earth's Interior School of Earth and Space Sciences University of Science and Technology of China Institute of Geophysics China Earthquake Administration School of Earth and Space Sciences Peking University College of Oceanography Hohai University State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake Administration Key Laboratory of Crustal Dynamics Institute of Crustal DynamicsChina Earthquake Administration Second Crust Monitoring and Application Center China Earthquake Administration National Scientific Field Observatory of Continental Rift Dynamics in Taiyuan Shanxi Seismic Bureau

At GMT time 13：19, August 8, 2017, an M1.0 earthquake struck the Jiuzhaigou region in Sichuan Province, China, causing severe damages and casualties. To investigate the source properties, seismogenic structures, and seismic hazards, we systematically analyzed the tectonic environment, crustal velocity structure in the source region, source parameters and rupture process, Coulomb failure stress changes, and 3-D features of the rupture plane of the Jiuzhaigou earthquake. Our results indicate the following：（1） The Jiuzhaigou earthquake occurred on an unmarked fault belonging to the transition zone of the east Kunlun fault system and is located northwest of the Huya fault. （2） Both the mainshock and aftershock rupture zones are located in a region where crustal seismic velocity changes dramatically. Southeast to the source region, shear wave velocity at the middle to lower crust is significantly low, but it rapidly increases northeastward and lies close to the background velocity across the rupture fault. （3） The aftershock zone is narrow and distributes along the northwest-southeast trend, and most aftershocks occur within a depth range of 5-20 km. （4） The focal mechanism of the Jiuzhaigou earthquake indicates a left-lateral strike-slip fault, with strike, dip, and rake angles of 152~, 74~ and 8~, respectively. The hypocenter depth measures 20 km, whereas the centroid depth is about 6 kin. The co-seismic rupture mainly concentrates at depths of 3-13 km, with a moment magnitude （Mw） of 6.5. （5） The co-seismic rupture also strengthens the Coulomb failure stress at the two ends of the rupture fault and the east segment of the Tazang fault. Aftershocks relocation results together with geological surveys indicate that the causative fault is a near vertical fault with notable spatial variations： dip angle varies within 660-89~ from northwest to southeast and the average dip angle measures -84~. The results of this work are of fundamental importance for further studies on th

关键词： Jiuzhaigou earthquake Velocity structure Source parameters Seismogenic structure Seismic hazard

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Did the MS 7.0 Lushan earthquake dynamically trigger earthquakes in the Datong volcanic region(Shanxi Province)?

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Earthquake Science 2013年第3期26卷 229-239页

作者： meiqin song Yong Zheng Rui Fu Xiangjun Liang Xia Wang Li Li Bin Li National Scientific Field Observatory of Continental Rift Dynamics in Taiyuan Shanxi Seismic Bureau State Key Laboratory of Geodesy and Dynamics Institute of Geodesy and GeophysicsChinese Academy of Sciences Graduate School Chinese Academy of Sciences

Immediately following the Ms7.0 Lushan earthquake on April 20, 2013, using high-pass and low- pass filtering on the digital seismic stations in the Shanxi Province, located about 870-1,452 km from the earthquake epicenter, we detected some earthquakes at a time corre- sponding to the first arrival of surface waves in high-pass filtering waveform. The earthquakes were especially noticed at stations in Youyu （YUY）, Shanzizao （SZZ）, Shanghuangzhuang （SHZ）, and Zhenchuan （ZCH）, which are located in a volcanic region in the Shanxi Province,but they were not listed in the Shanxi seismic observation report. These earthquakes occurred 4-50 rain after the passage of the maximum amplitude Rayleigh wave, and the periods of the surface waves were mainly between 15 and 20 s following. The Coulomb stresses caused by the Ray- leigh waves that acted on the four stations was about 0.001 MPa, which is a little lower than the threshold value of dynamic triggering, therefore, we may conclude that the Datong volcanic region is more sensitive to the Coulomb stress change. To verify, if the similar phenomena are widespread, we used the same filtering to observecontrastively continuous waveform data before, and 5 h after, the Ms7.0 Lushan earthquake and Ms9.0 Tohoku earthquake in 2011. The results show that the similar phenomena occur before the earthquakes, but the seis- micity rates after the earthquakes are remarkably increased. Since these weak earthquakes are quite small, it is hard to get clear phase arrival time from three or more stations to locate them. In addition, the travel time differences between P waves and S waves （S-P） are all less than 4 s, that means the events should occur in 34 km around the stations in the volcanic region. The stress of initial dynamic triggering of the Ms9.0 Tohoku earthquake was about 0.09 MPa, which is much higher than the threshold value of dynamic triggering stress. The earthquakes after the Ms9.0 Tohoku earthquake are related to dynamic triggeri

关键词： Datong volcanic region Triggeredseismicity The 2013 Lushan earthquake

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大同窗地震活动频次和应变能特征

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中国地震 2017年第2期33卷 328-337页

作者：王霞宋美琴山西省地震局太原市晋祠路二段69号030021

通过对大同地震活动窗自开启以来(1989年10月~2016年10月)的地震频次和应变能进行统计分析,发现大同窗的月频次衰减拟合结果呈现分段交替活动特征,可分为3个活跃时段和2个背景活动时段。当处在活跃时段时,山西和张渤这2个地震活动带的... 详细信息

通过对大同地震活动窗自开启以来(1989年10月~2016年10月)的地震频次和应变能进行统计分析,发现大同窗的月频次衰减拟合结果呈现分段交替活动特征,可分为3个活跃时段和2个背景活动时段。当处在活跃时段时,山西和张渤这2个地震活动带的地震密集发生,但在正常背景活动时,2个地震带发生的地震则较少。应变能统计结果表明,鄂尔多斯块体周缘强震对大同窗的地震活动有较直接的影响,显示出强震的震级越大、与大同窗的距离越近,则大同窗出现应变能异常就越早、幅度也越大;另外,大同窗受青藏块体强震的影响较强,而受西太平洋板块俯冲的影响较弱;大同窗应变能在周边块体强震后的反应,可能与其所处的地质构造环境有关,因此对应力场的变化较敏感。

关键词：大同窗月频次应变能

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城市污水处理厂升级改造工程设计与运行效果

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海洋湖沼通报 2015年第1期 134-140页

作者：刘如玲宋美芹青岛市团岛污水处理厂山东青岛266002 青岛思普润水处理有限公司山东青岛266000

为保护海洋环境,改善胶州湾的水污染现状,根据青岛市政府的要求对污水处理厂进行升级改造。主体生化工艺采用A2/O+移动床生物膜(MBBR)工艺,通过投加SPR-1生物填料,将好氧段改造为生物膜—活性污泥复合工艺。同时新建混凝、沉淀、过滤等... 详细信息

为保护海洋环境,改善胶州湾的水污染现状,根据青岛市政府的要求对污水处理厂进行升级改造。主体生化工艺采用A2/O+移动床生物膜(MBBR)工艺,通过投加SPR-1生物填料,将好氧段改造为生物膜—活性污泥复合工艺。同时新建混凝、沉淀、过滤等深度处理设施。运行四年来,效果良好,抗冲击负荷能力强,可同时强化脱氮除磷,主要水质指标均稳定达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准。实践证明,该工艺可大幅减少工程量,具有运行管理简便、处理效率稳定等特点,较好地解决了市政污水厂升级改造中的难题,可为其他污水厂的升级改造提供借鉴。同时,污染物年减排量明显提高,团岛海域水质环境质量将得到进一步改善。

关键词：污水处理升级改造移动床生物膜脱氮除磷运行效果海水水质改善

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导乐陪伴联合导乐分娩镇痛仪在阴道分娩初产妇中的应用效果

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妇儿健康导刊 2024年第4期3卷 177-180页

作者：宋美勤山东省菏泽市第六人民医院产房山东菏泽274000

目的探讨导乐陪伴联合导乐分娩镇痛仪在阴道分娩初产妇中的应用效果。方法选取2022年8月至2023年6月于菏泽市第六人民医院行阴道分娩的112例初产妇作为研究对象,采用随机数字表法分为对照组和试验组,每组各56例。对照组采用常规助产护... 详细信息

目的探讨导乐陪伴联合导乐分娩镇痛仪在阴道分娩初产妇中的应用效果。方法选取2022年8月至2023年6月于菏泽市第六人民医院行阴道分娩的112例初产妇作为研究对象,采用随机数字表法分为对照组和试验组,每组各56例。对照组采用常规助产护理,试验组在对照组基础上采用导乐陪伴联合导乐分娩镇痛仪助产,比较两组第一与第二产程、疼痛情况、阴道分娩成功率与护理满意度。结果试验组第一与第二产程均短于对照组(P <0.05);试验组活跃期、潜伏期的视觉模拟评分法评分均低于对照组(P <0.05);试验组阴道分娩成功率与护理满意率均高于对照组(P<0.05)。结论导乐陪伴联合导乐分娩镇痛仪可有效缩短阴道分娩初产妇产程,缓解分娩疼痛,提高阴道分娩成功率与护理满意度。

关键词：导乐陪伴导乐分娩镇痛仪阴道分娩初产妇

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山西原平M_L4.7地震矩张量反演

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太原理工大学学报 2019年第5期50卷 598-605页

作者：李斌李自红宋美琴关鹏虎太原理工大学矿业工程学院太原030024 太原理工大学地震与地质灾害防治研究所太原030024 山西省地震局太原030021

利用山西区域地震台网数字波形资料,在对地震重新定位的基础上,对2016年4月7日山西原平M L4.7地震进行了矩张量反演计算与参数的稳定性评价,获得了此次地震的最佳双力偶解;并将反演结果与不同台站垂向分量的P波极性在震源球上的分布位置... 详细信息

利用山西区域地震台网数字波形资料,在对地震重新定位的基础上,对2016年4月7日山西原平M L4.7地震进行了矩张量反演计算与参数的稳定性评价,获得了此次地震的最佳双力偶解;并将反演结果与不同台站垂向分量的P波极性在震源球上的分布位置,以及利用Snoke方法和CAP方法得到的震源机制解进行对比,验证了参数的合理性与可靠性。结果显示:最佳双力偶解的节面Ⅰ参数为走向143°,倾向63°,滑动角-66°;节面Ⅱ走向278°,倾向36°,滑动角-128°;震源机制类型属于正断兼有右旋走滑分量,最佳震源深度11~14 km.主压应力P轴方位角94°,倾角64°;主张应力T轴方位角216°,倾角15°;标量地震矩M 0=2.492 64×10^15 N·m,矩震级结果为M W=4.2,与M S震级基本一致。

关键词：震源机制解矩张量反演地震定位山西地震带山西原平

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纳米空心氧化铝负载的钴钼烟气脱硫催化剂的研究

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广东化工 2010年第5期37卷 84-85页

作者：宋美芹青岛科技大学化工学院山东青岛266042

文章主要研究了纳米空心氧化铝及其负载的钴钼脱硫催化剂的制备及其性能。文章的空心氧化铝通过葡萄糖交联碳球绿色模板法制得,研究了不同条件的制备方法对其性能的影响,钴钼催化剂通过超声浸渍法制得,其载体及催化剂微观形貌通过SEM测... 详细信息

文章主要研究了纳米空心氧化铝及其负载的钴钼脱硫催化剂的制备及其性能。文章的空心氧化铝通过葡萄糖交联碳球绿色模板法制得,研究了不同条件的制备方法对其性能的影响,钴钼催化剂通过超声浸渍法制得,其载体及催化剂微观形貌通过SEM测定。对其负载的钴钼催化剂通过XRD进行了表征,特殊的氧化铝负载的钴钼催化剂在脱硫过程中与二氧化硫有着较好的接触面积,有利于脱硫过程的进行。

关键词：脱硫空心球钴钼催化剂

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