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Seismotectonics of the 26 November 2005 Jiujiang-Ruichang,Jiangxi,Ms 5.7 Earthquake

Acta Geologica Sinica(English Edition) 2012年第2期86卷 497-509页

作者： HAN Zhujun LUFushui JI Fengju zeng xinfu An Yanfen Key Laboratory of Active Tectonics and Volcano Institute of GeologyChina Earthquake AdministrationBeijing 100029China Earthquake Administration Bureau of Jiangxi Province Nanchang 330039China

The 26 November 2005 Jiujiang-Ruichang, Jiangxi, Ms 5.7 earthquake occurred in a seismotectonic setting of moderate earthquake. The northwest-trending Xiangfan-Guangji fault （XFG） does not enter into the epicenter vicinity, but the northeast-trending Ruichang-Wuning fault （RWF） as a regional fault extends to the epicenter nearby, appearing as the Ruichang basin and its marginal faults. Tilting of the Ruichang Basin （RCB） in the Quaternary was controlled by the RCB southeast- marginal, buried fault （RSMBF）. Shallow geophysical survey reveals that the RSMBF caused an offset of the reflection layers. Drill hole columnar section demonstrates that there are about 10-12 m displacement in the lower section of the middle-Pleistocene Series along the RSMBF, but no disruption is found in the upper section of the middle-Pleistocene Series. The RSMBF not only has activity in the Quaternary, but also coincides with the nodal plane I from the focal mechanism of the Jiujiang- Ruichang Ms 5.7 earthquake. This evidence, including aftershock distribution and isoseismic lines, strongly suggests that the RSMBF might be the seismogenic tectonics. The RWF is discontinuous at the surface, and consists of three en echelon Quaternary basins, which are the Ruichang, Fanzhen and Wuning basins. Three moderate earthquakes, the Fanzhen ML 4.9 earthquake, the Yejiapu ML 4.1 earthquake and the Jiujiang-Ruichang Ms 5.7 earthquake, have happened in the basins since 1995. The seismogenic tectonics of the Jiujiang-Ruichang Ms 5.7 earthquake is not isolated, but may be controlled by the RWF at depth, the slip of which causes the accumulation of energy for earthquake occurrence.

关键词： Jiujiang-Ruichang Ms 5.7 earthquake buried fault Ruichang basin seismo-tectonics

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Rayleigh wave phase velocities of South China block and its adjacent areas

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Science China Earth Sciences 2016年第11期59卷 2165-2178页

作者： L Jian XIE ZuJun ZHENG Yong ZHA XiaoHui HU Rui zeng xinfu Earthquake Administration of Jiangxi Province Nanchang 330039 China State Key Laboratory of Geodesy and Earth's Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China

Using records of continuous seismic waveforms from 609 broadband seismic stations in the South China Block and its adjacent areas in 2010–2012, empirical Green's functions of surface waves were obtained from cross-correlation functions of ambient noise data between these stations. High quality phase velocity dispersion curves of Rayleigh waves were obtained using time-frequency analysis. These interstation dispersion curves were then inverted to build Rayleigh wave phase velocity maps at periods of 6–50 s. The results of phase velocity maps indicate that phase velocities at 6–10 s periods are correlated with the geological features in the upper crust. Major basins and small-scale grabens and basins display slow velocity anomalies; while most of the orogenic belts and the fold belts display high velocity anomalies. With the gravity gradient zone along Taihang Mountain to Wuling Mountain as the boundary for the phase velocity maps at period of 20–30 s, the western area mainly displays low velocity anomalies, while the eastern side shows high velocity anomalies. Phase velocities in the eastern South China Block south to the Qinling-Dabie orogenic belt is higher than that in the eastern North China Block to the north, which is possibly due to the differences of tectonic mechanisms between the North China Craton and the South China Block. The phase velocities at periods of40–50 s are possibly related to the lateral variations of the velocity structure in the lower crust and upper mantle: The low-velocity anomalies in the eastern part of the Tibetan Plateau are caused by the thick crust; while the Sichuan Basin and the southern part of the Ordos Basin display distinct high-velocity anomalies, reflecting the stable features of the lithosphere in these blocks. The lateral variation pattern of phase velocities in the southern part of the South China Block is not consistent with the surface trace of the block boundary in the eastern Yunnan Province and its vicinities. The pha

关键词： South China block Ambient noise Phase velocity tomography Crust and upper mantle

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Effects of dietary supplementation of probiotic,Clostridium butyricum,on growth performance,immune response,intestinal barrier function,and digestive enzyme activity in broiler chickens challenged with Escherichia coli K88

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Journal of Animal Science and Biotechnology 2016年第1期7卷 107-115页

作者： Ling Zhang Lingling Zhang Xiu'an Zhan xinfu zeng Lin Zhou Guangtian Cao An'guo Chen Caimei Yang College of Animal Science Zhejiang UniversityHangzhou 310058China College of Animal Science and Technology Zhejiang A&F University88 North Huancheng RoadLin'anZhejiang 311300China Zhejiang Huijia Biological Technology Ltd. Anji 313307China

Background： Colibacillosis caused by enterotoxigenic Escherichia coil （E. coil} results in economic losses in the poultry industry. Antibiotics are usually used to control colibacillosis, however, E. coli has varying degrees of resistance to different antibiotics. Therefore the use of probiotics is becoming accepted as an alternative to antibiotics. In this study, we evaluated the effects of Clostfidium butyricum （C. butyficum） on growth performance, immune response, intestinal barrier function, and digestive enzyme activity in broiler chickens challenged with Eschefichia coli （E. coil） K88. Methods： The chickens were randomly divided into four treatment groups for 28 days. Negative control treatment （NC） consisted of birds fed a basal diet without E. coil K88 challenge and positive control treatment （PC） consisted of birds fed a basal diet and challenged with E. coil K88. C. buO/ricum probiotic treatment （CB） consisted of birds fed a diet containing 2 x 107 cfu C. buO/ricum/kg of diet and challenged with E. coil K88. Colistin sulfate antibiotic treatment （CS） consisted of birds fed a diet containing 20 mg colistin sulfate/kg of diet and challenged with E. coil K88. Results： The body weight （BW） and average day gain （ADG） in the broilers of CB group were higher （P 〈 0.05） than the broilers in the PC group overall except the ADG in the 14-21 d post-challenge. The birds in CB treatment had higher （P 〈 0.05） concentration of tumor necrosis factor-a （TNF-a） at 3 and 7 d post-challenge, and higher （P 〈 0.05） concentration of interleukin-4 （IL-4） at 14 d post-challenge than those in the PC treatment group. The concentration of serum endotoxin in CB birds was lower （P 〈 0.05） at 21 d post-challenge, and the concentrations of serum diamine oxidase in CB birds were lower （P 〈 0.05） at 14 and 21 d post-challenge than in PC birds. Birds in CB treatment group had higher （P 〈 0.05） jejunum villi height than those in PC, NC, or CS treatment at 7, 14, and 21 d post-challenge. In c

关键词： Broiler chickens Clostridium butyricum Digestive enzyme activity Escherichia coli K88 Growth performance Immune response Intestinal barrier

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Discussion on the Precise Relocation and Seismo-Tectonics of the Jiujiang-Ruichang Earthquake

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Earthquake Research in China 2008年第1期22卷 42-51页

作者： Tu Jian Ni Sidao Shen Xiaoqi Gao Jianhua zeng xinfu University of Science and Technology of China Hefei 230026 China Earthquake Administration of Jiangxi Province Nanchang 330039 China Earthquake Administration of Anhui Province Hefei 230026 China

Based on relocating the Jiujiang-Ruichang earthquake sequence which occurred on November 26, 2005 in Jiangxi Province with the double-difference （DD） algorithm and master event technique, the paper discusses the focal mechanism of the main shock （MsS.7） and the probable seismo-tectonics. The precise relocation results indicate that the average horizontal error is 0.31kin in a EW direction and 0.40kin in a NS direction, and the average depth error is 0.48kin. The focal depths vary from 8kin to 14kin, with the predominant distribution at 10kin - 12kin. The epicenter of the main shock is relocated to be 29.69^oN, 115.74^oE and the focal depth is about ***. Combining the predominant distribution of the earthquake sequence, the focal mechanism of the main shock and the tectonic conditions of N-E- and NW-strike faults growth in the seismic region, we infer that the main shock of the earthquake sequence was caused by a NW striking buried fault in the Rnichang basin. The nature of seismic faults needs to be further explored.

关键词： Jiujiang-Ruichang earthquake Double-difference earthquake location algorithm Master event technique Focal mechanism solution Seismo-tectonics

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Shear-wave Splitting of Aftershocks of the M_S 5.7 Jiujiang-Ruichang Earthquake

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Earthquake Research in China 2013年第1期27卷 67-76页

作者： Tang Lanrong Shi Yutao zeng xinfu Zheng Bin Zhao Bo Lv Jian Earthquake Administration of Jiangxi Province Institute of Earthquake Science China Earthquake Administration

Shear wave splitting is studied based on the digital waveforms of three seismic stations DJS, SZD and WUJ, which were set up after the Jiujiang-Ruichang MS5.7 earthquake of November 26, 2005 around the epicenter area. The result shows that the time delays of slow shear waves of the DJS station, which is not far from the epicenter and where the distribution of faults is complex near the station, are relatively larger and the polarization directions of fast shear waves are not concentrated; the predominant polarization direction of fast shear waves of WUJ station, with single fault distributed nearby, has a difference of 35° to the strike of the fault and is inconsistent with the direction of regional principal compressive stress. The predominant polarization direction of fast shear waves of SZD station with no faults nearby is in accordance with regional principal compressive stress. There is no obvious regular relationshipship between the delay time and the focal depth.

关键词： Jiujiang-Ruichang earthquake Shear wave splitting Regional principal compressive stress Anisotropy

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寻乌及邻区震源机制和视应力特征

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大地测量与地球动力学 2020年第8期40卷 778-782,789页

作者：汤兰荣曾新福罗丽黎斌吕坚江西省地震局南昌市330096

利用寻乌及邻区2009年以来的地震波形资料,采用Snoke方法反演19次M L2.5以上地震的震源机制,计算89次M L1.5以上地震的视应力。结果显示,寻乌及邻区的走滑型地震占绝对优势,震源机制解P轴优势方向分布在310°~320°和110°~130°之间,... 详细信息

利用寻乌及邻区2009年以来的地震波形资料,采用Snoke方法反演19次M L2.5以上地震的震源机制,计算89次M L1.5以上地震的视应力。结果显示,寻乌及邻区的走滑型地震占绝对优势,震源机制解P轴优势方向分布在310°~320°和110°~130°之间,倾角绝大多数在40°以内,与该区以NWW-SEE向水平挤压为特征的构造应力场吻合;寻乌震群集中区内8次M L2.5以上地震的震源机制结果一致性较好。寻乌及邻区视应力与震级呈正相关,2017-11-06寻乌M L3.8震群前的差视应力值出现高值波动。

关键词：寻乌及邻区 Snoke方法震源机制解视应力

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赣江断裂第四纪活动性初步研究

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华南地震 2018年第3期38卷 25-30页

作者：曾新福汤兰荣江西省地震局南昌330039

赣江断裂带是江西省境内一条重要的区域性大断裂。断裂涉及九江、南昌和吉安等江西重要经济区,因此充分研究该断裂活动性对认识断裂沿线分布的历史地震的发震构造及规划断裂沿线城市的经济建设有科学意义。大致以丰城为界,赣江断裂北段... 详细信息

赣江断裂带是江西省境内一条重要的区域性大断裂。断裂涉及九江、南昌和吉安等江西重要经济区,因此充分研究该断裂活动性对认识断裂沿线分布的历史地震的发震构造及规划断裂沿线城市的经济建设有科学意义。大致以丰城为界,赣江断裂北段(丰城—湖口段)和南段(吉水—丰城段)走向有明显的变化,北段走向NNE,南段走向NE,断层南北两段地震活动性略有不同,北段沿线记录地震多于南段。针对断层隐伏区采用了浅层地震勘探法和跨断层综合地质剖面法相结合的研究方法、对断层出露区采用断层剖面出露点观察调查法。综合研究结果表明:赣江断裂南、北两段的最新活动性时代一致,均为中更新世。

关键词：赣江断裂北段(丰城—湖口段) 南段(吉水—丰城段) 断裂活动性

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瞬变电磁法在煤矿采空区及富水性探测中的应用

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华南地震 2021年第4期41卷 102-106页

作者：梁帅曾新福江西省地震局南昌330039

瞬变电磁法作为地球物理勘查的重要手段之一,利用对电阻的异常灵敏反应,将采集到的数据分析处理、绘制出视电阻率测深剖面、视电阻率解释顺层切片,可直观地对煤系地层的采空区展布、含水层及其富水性、断层的富、导水性进行评价,可有效... 详细信息

瞬变电磁法作为地球物理勘查的重要手段之一,利用对电阻的异常灵敏反应,将采集到的数据分析处理、绘制出视电阻率测深剖面、视电阻率解释顺层切片,可直观地对煤系地层的采空区展布、含水层及其富水性、断层的富、导水性进行评价,可有效避免矿井开采过程中带来的地质危害及资源浪费。

关键词：瞬变电磁法视电阻率采空区

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益生菌通过肠-脑轴调控动物骨代谢的研究进展

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中国畜牧杂志 2021年第9期57卷 22-27页

作者：余洋曾新福乐敏杨彩梅浙江农林大学动物科技学院·动物医学院浙江省畜禽绿色生态健康养殖应用技术研究重点实验室动物健康互联网检测技术浙江省工程实验室浙江临安311300 浙江惠嘉生物科技股份有限公司浙江安吉313300 浙江大学动物科学学院浙江杭州310058

近来,国内外研究发现肠道微生物与骨代谢密切相关,基于微生物-肠-脑轴研究益生菌对机体骨代谢的研究逐渐成为热点。本文基于肠-脑轴影响机体骨骼代谢,对益生菌通过调节肠道菌群结构产生神经递质、调节细胞免疫因子等影响代谢进行总结梳... 详细信息

近来,国内外研究发现肠道微生物与骨代谢密切相关,基于微生物-肠-脑轴研究益生菌对机体骨代谢的研究逐渐成为热点。本文基于肠-脑轴影响机体骨骼代谢,对益生菌通过调节肠道菌群结构产生神经递质、调节细胞免疫因子等影响代谢进行总结梳理,为相关骨骼疾病研究提供理论支撑,为动物生产提供参考。

关键词：益生菌肠道菌群肠-脑轴动物骨代谢

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九江-瑞昌地震震源机制和应力场特征

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大地测量与地球动力学 2018年第8期38卷 791-795,827页

作者：汤兰荣吕坚曾新福杨雅琼曾文敬段莉莉江西省地震局南昌市洪都北大道865号330039 河北省地震局石家庄市槐中路262号050021 哈尔滨市防震减灾技术中心哈尔滨市友谊西路5888号150021

利用九江-瑞昌5.7级地震后震区地震波形资料,采用Snoke发展的基于P波、SV波、SH波初动和振幅比联合计算震源机制解的方法(FOCMEC),分两个时段反演得到176个ML≥1.0地震的震源机制解。结果显示,MS5.7主震发震断层是在近EW向的区域应力场... 详细信息

利用九江-瑞昌5.7级地震后震区地震波形资料,采用Snoke发展的基于P波、SV波、SH波初动和振幅比联合计算震源机制解的方法(FOCMEC),分两个时段反演得到176个ML≥1.0地震的震源机制解。结果显示,MS5.7主震发震断层是在近EW向的区域应力场挤压作用下产生的带有逆断性质的左旋走滑断层,余震也以走滑型运动为主,NW向洋鸡山-武山-通江岭隐伏断裂为主震的发震构造。地震节面走向主要集中在NEE和NWW两个方向,与余震分布优势方向、震区构造大体一致。两个时段的震源机制解P轴优势方向均为近EW向,与主震P轴方向接近,也与江西北部地区的构造应力场分布特征相一致。应力场反演结果与震源机制参数统计结果整体一致,表现为近EW向挤压和近NS向拉张作用。

关键词：九江-瑞昌地震 Snoke方法震源机制解区域应力场

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