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Tectonic implications of the subduction of the Kyushu-Palau Ridge beneath the Kyushu,southwest Japan

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Acta Oceanologica Sinica 2021年第3期40卷 70-83页

作者： Chenglong Xia yanpeng zheng Baohua Liu Qingfeng Hua Long Ma Xianfeng Li Qiuhong Xie College of Marine Geosciences Ocean University of ChinaQingdao 266100China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan 430074China National Deep Sea Center Qingdao 266237China Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China

The Kyushu-Palau Ridge(KPR),a remnant arc on the Philippine Sea Plate(PSP),is subducting beneath the Kyushu,southwest *** by the subducting KPR,the Kyushu subduction zone corresponding to the KPR is significantly different from Shikoku subduction zone in terms of gravity anomalies,seismicity,the stress state,and the subducting slab *** negative free-air and Bouguer gravity anomalies are observed in a prolonged area of KPR,southeast of the Miyazaki Plain,indicating that this is where KPR overlaps the overriding *** gravity anomaly in this area is much lower than that in other areas where the inferred KPR extends,suggesting that the subduction of the buoyant KPR may cause the lower mantle density to *** earthquakes have occurred in Hyuga-nada region where the KPR subducts than in Shikoku forearc and other areas in the Kyushu forearc,indicating that the subduction of the KPR enhances the local coupling between the subducting and overriding *** centroid moment tensor(CMT)mechanism of earthquakes shows that stress is concentrated in the accumulated crust beneath the Kyushu forearc corresponding to the KPR,and the shallow thrusting events in the obducting plate are caused by the KPR *** buoyant KPR,with a large volume of low-density sediments,was responsible for the differences of the subduction depth and dip angle of the subducting Philippine Sea(PS)slab between northern Kyushu and *** seismic gaps and the sudden change of the dipping angle of the subducting PS slab indicate that slab tear may have occurred along the west side of the KPR beneath southwest Kyushu.A two-tear model was proposed,and the subduction of the buoyant KPR was believed to play an important role in the slab tear.

关键词： Kyushu-Palau Ridge gravity anomaly seismicity slab morphology slab tear

Assessment of structural stability in Bohai Sea area based on AHP-GDM model

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Acta Oceanologica Sinica 2013年第4期32卷 41-48页

作者： XIU Zongxiang LIU Baohua XIE Qiuhong LI Xishuang LIU Chenguang PEI Yanliang zheng yanpeng The First Institute of Oceanography State Oceanic Administration Key Laboratory of Marine Sedimentology and Environmental Geology National Deep Sea Center

The AHP-GDM model is used for the assessment of structural stability, with the Bohai Sea area as an exam- ple. In this model, the credit degree of each expert is calculated through the assessment matrix based on the similarity and diversity of vector. The comprehensive opinions of expert panel are quantitatively obtained by considering the effect ofcredit degree. According to the geological structural setting, the Bohai Sea is di- vided into twelve assessment zones of structural stability by non-uniform element method. The structural stability grade of each zone is obtained on the basis of the latest geophysical data, earthquake statistical data, and the information of fault activities, current stress field and crustal deformation. The results show that there are one relatively stable area, three relatively sub-stable areas, six relatively sub-unstable areas and two relatively unstable areas. The assessment results of non-uniform element method are very close with those of uniform grid method with size of 0.25 in longitude direction and 0.14 in latitude direction. However the workload of non-uniform element method is only 1 / 16 of the latter. Compared with traditional assessment methods of structural stability, a more objective and reliable assessment result can be obtained by combining non-uniform element method and AHP-GDM model.

关键词： AHP-GDM Mode Bohai Sea structural stability non-uniform element method

Cross-talking between autophagy and viral infection in mammalian cells

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Frontiers in Biology 2010年第6期5卷 507-515页

作者： Hongya HAN Lishu ZHANG Xinxian DAI yanpeng zheng College of Life Sciences&Bioengineering Beijing Jiaotong UniversityBeijing 100044China

Autophagy is a cellular process in degradation of long-lived proteins and organelles in the cytosol for maintaining cellular homeostasis,which has been linked to a wide range of human health and disease states,including viral *** viral infected cells exhibit a compli-cated cross-talking between autophagy and *** has been shown that autophagy interacts with both adaptive and innate *** adaptive immunity,viral antigens can be processed in autophagosomes by acidic proteases before major histocompatibility complex(MHC)class II *** innate immunity,autophagy may assist in the delivery of viral nucleic acids to endosomal TLRs and also functions as a part of the TLR-or-PKR-downstream *** was also reported to suppress the magnitude of host innate antiviral immunity in certain *** the other hand,viruses has evolved many strategies to combat or utilize the host autophagy for their own beneﬁ*** this review we discussed recent advances toward clarifying the cross-talking between autophagy and viral infection in mammalian cells.

关键词： cross-talking autophagy viral infection

Velocity structure in the South Yellow Sea basin based on first-arrival tomography of wide-angle seismic data and its geological implications

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Acta Oceanologica Sinica 2023年第2期42卷 104-119页

作者： Weina Zhao Zhiqiang Wu Fanghui Hou Xunhua Zhang Tianyao Hao Hanjoon Kim yanpeng zheng Shanshan Chen Huigang Wang Qingdao Research Institute Northwestern Polytechnical UniversityXi’an710072China Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan430074China Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing100037China Qingdao Institute of Marine Geology China Geological SurveyQingdao266071China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing100029China Marine Active Fault Research Group Korea Institute of Ocean Science and TechnologyBusan49111Republic of Korea Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao266061China School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an710072China

The South Yellow Sea basin is filled with Mesozoic-Cenozoic continental sediments overlying pre-Palaeozoic and Mesozoic-Palaeozoic marine *** multi-channel seismic data cannot describe the velocity structure of the marine residual basin in detail,leading to the lack of a deeper understanding of the distribution and lithology owing to strong energy shielding on the top interface of marine *** this study,we present seismic tomography data from ocean bottom seismographs that describe the NEE-trending velocity distributions of the *** results indicate that strong velocity variations occur at shallow crustal *** velocity bodies show good correlation with surface geological features,and multi-layer features exist in the vertical velocity framework(depth:0–10 km).The analyses of the velocity model,gravity data,magnetic data,multichannel seismic profiles,and drilling data showed that high-velocity anomalies(>6.5 km/s)of small(thickness:1–2 km)and large(thickness:>5 km)scales were caused by igneous complexes in the multi-layer structure,which were active during the *** locations of good Mesozoic and Palaeozoic marine strata are limited to the Central Uplift and the western part of the Northern Depression along the wide-angle ocean bottom seismograph *** the Indosinian movement,a strong compression existed in the Northern Depression during the extensional phase that caused the formation of folds in the middle of the survey *** study is useful for reconstructing the regional tectonic evolution and delineating the distribution of the marine residual basin in the South Yellow Sea basin.

关键词： ocean bottom seismograph South Yellow Sea basin strata velocity structure wide-angle seismic data CSDP-2

Marine Engineering Geological Exploration Information System(MEGEIS):A GIS-based Application to Marine Resources Exploitation

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Journal of Ocean University of China 2007年第3期6卷 226-230页

作者： SU Tianyun LIU Baohua ZHAI Shikui LIANG Ruicai zheng yanpeng Key Laboratory of Marine Sedimentology and Environmental Geology SOA Qingdao 266061 P. R. China First Institute of Oceanography SOA Qingdao 266061 P. R. China College of Marine Geo-science Ocean University of China Qingdao 266003 P. R. China

Based on the ArcGIS geographic information system and the ORACLE database management system,this paper reports our studies on the technology of Marine Engineering Geological Exploration Information System(MEGEIS). By analyzing system structure,designing function modules and discussing data management,this paper systematically proposes a framework of technol-ogy to integrate,manage,and analyze the seabed information comprehensively. Then,the technology is applied to the design and development of the Bohai Sea Oilfield Paradigm Area Information System. The system can not only meet the practical demands of marine resources exploration and exploitation in the Bohai Sea oilfield,but also serve as a preparatory work in theory and technology for the realization of the 'Digital Seabed'.

关键词： geographic information system (GIS) Digital Oilfield marine resources exploitation Digital Seabed Marine Engineering Geological Exploration Information System (MEGEIS)

Joint land-sea seismic survey and research on the deep structures of the Bohai Sea areas

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Acta Oceanologica Sinica 2013年第12期32卷 13-24页

作者： HAO Tianyao YOU Qingyu LIU Lihua LV Chuanchuan XU Ya LI Zhiwei ZHAO Chunlei zheng yanpeng LIU Chenguang HAN Guozhong Institute of Geology and Geophysics Chinese Academy of Sciences Wuhan Institute of Geodesy and Geophysics Chinese Academy of Sciences The First Institute of Oceanography State Oceanic Administration

This paper presents the survey and research work of two land-sea profiles in the Bohai Sea, China, carried out in 2010-2011, including the seismic sources on land and in the sea, the ocean bottom seismographs （OBS） and their recovery, the coupling of OBS and the environment noise in sea area, the data quality of OBSs, and the result of data analysis. We focused on the investigation of crustal structures revealed by the two NE／EW-trending joint land-sea profiles. In combination with the Pn-velocity distribution and gravity- magnetic inversion results in the North China Craton, we propose that the undulation of the Moho interface in the Bohai and surrounding areas is not strong, and the lithospheric thinning is mainly caused by the thinning of its mantle part. The research result indicates that obvious lateral variations of Moho depth and seismic velocity appear nearby all the large-scale faults in Bohai Sea, and there is evidence of underplating and reforming of the lower crust by mantle material in the Bohai area. However, geophysical evidence does not appear to support the ＂mantle plume＂ or ＂delamination＂ model for the North China Craton destruction. The crustal structure of the Bohai Sea revealed ＂a relatively normal crust and obviously thinned mantle lid＂, local velocity anomalies and instability phenomena in the crust. These features may represent a combined effect of North China-Yangtze collision at an early stage and the remote action of Pacific plate subduction at a late stage.

关键词： seismic survey profiles velocity anomaly crustal structure lithospheric thinning Bohai Sea

Application of Acoustic Technique to Surveying a Buried Fault in Tianjin

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Earthquake Research in China 2008年第3期22卷 304-316页

作者： Chen Yukun zheng yanpeng Gao Wuping Wang Zhisheng Earthquake Administration of Tianjin Municipality Tianjin 300201 China First Institute of Oceanography SOA Qingdao 266003 China

We carried out surveying on the shallow structure and faulted-stratum of the Haihe fault in Tianjin using acoustic surveying methods such as the single-channel seismic technique. The result shows that the method can obtain satisfactory results in wide and deep river courses. It also shows that in the Tanggu area of Tianjin, the upper fault point of Haihe fault is about 30m beneath the river bed and the corresponding latest active period is Qp^3- Qh^1 , which is consistent with the former borehole survey result. In the offshore area of the Bohai Sea, Haihe fault shows as a NWW-NEE strike dense fault zone and its upper fault point is less than 30m beneath the seabed. It shows that the active characteristics of Haihe fault in the Bohai Sea correspond to the Tanggu area.

关键词： Acoustic exploration Seismic reflection wave groups Marine strata Haihe fault

Morphology and architecture of the typical erosion-genesis submarine canyons on the East China Sea slope

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Acta Oceanologica Sinica 2009年第6期28卷 42-52页

作者： LIU Baohua ZHAO Yuexia LI Xishuang KAN Guangming PEI Yanliang zheng yanpeng First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Sedimentology and Environmental Geology of State Oceanic Administration Qingdao 266061 China

The Yithi submarine canyons, composed of four canyons less than 60 km in length, are located on the narrowest part of the East China Sea （ECS） slope. They extend from the shelf break at 160 m down to water depth of 1 500 m with an average gradient （along the canyon axis） of 3°（〈1 000 m） and 0.7°（〈1 000 m）. The sinuosity of the canyons ranges form 1.02 to 1.14 and their pathways extend radially from the shelf break to the axis of the Okinawa Trough. Structural and evolution pattern of the Yithi canyons are mainly controlled by sediment mass-movements and turbidity current and similar with that of the canyons in Ebro continental slope. The whole canyon system consists of three parts： the canyon, the channel and the fan. Slumps and slides often develop in the upper part of canyon where the water depth is less than 1 000 m, and the turbidities usually developed on the fan. The scale of turbidites becomes smaller and their inner structures become more regular towards the ends of the canyons. Canyon-fans are often associated with small angle progradational reflection. Most canyon-fans and levees were transversely cut by active normal faults with NEE- SWW trending that are coupled to the modern extension of the Okinawa Trough. According to the age of formation of canyon-fans and sediments incised by canyons, we can infer that the Yithi canyons were formed since the middle the Medio-Pleistocene.

关键词： moroholouv architecture uenesis canyon the East China Sea slope

胶束电动毛细管色谱双通道电化学检测尼群地平

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化学学报 2003年第1期61卷 89-94页

作者：郑妍鹏莫金垣赖瑢中山大学化学与化学工程学院广州510275

创建了尼群地平的胶束电动毛细管色谱双通道电化学检测的分析新方法.采用两台安培检测器并联构成双通道检测系统,采用单一碳糊工作电极,两台安培检测器的检测电位分别设为 + 0.7V和 -0.8V(***),同时对尼群地平进行氧化和还原测定,并实... 详细信息

创建了尼群地平的胶束电动毛细管色谱双通道电化学检测的分析新方法.采用两台安培检测器并联构成双通道检测系统,采用单一碳糊工作电极,两台安培检测器的检测电位分别设为 + 0.7V和 -0.8V(***),同时对尼群地平进行氧化和还原测定,并实时对数据进行采集、处理,以图形方式显示.采用NH3 NH4 Cl为背景电解质,并加入十二烷基硫酸钠(SDS)和甲醇组成运行电泳介质,应用氧化、还原双通道检测系统对尼群地平及其片剂进行了胶束电动毛细管色谱分离检测;对工作电极的选择、电极电位的选择、SDS的浓度、甲醇浓度、运行缓冲溶液种类以及工作电压和进样时间对分离检测的影响进行了研讨。

关键词：胶束电动毛细管色谱双通道电化学检测尼群地平心血管疾病药物药物分析血管扩张剂