检索结果-南通市图书馆

Intermingled fates of the South China Sea and Philippine Sea plate

在线全文

学校读者我要写书评

暂无评论

National Science Review 2019年第5期6卷 886-890页

作者： minghui zhao Jean-Claude Sibuet Jonny Wu Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of Sciences Innovation Academy of South China Sea Ecology and Environmental Engineering Chinese Academy of Sciences Department of Earth and Atmospheric Sciences University of Houston

Recent studies have shown the extent and nature of the South China Sea (SCS) at the end of spreading by unfolding (*** restoring) the Manila slab,which is the subducted part of the SCS,and by identifying the nature of... 详细信息

关键词： SCS domain Intermingled fates of the South China Sea and Philippine Sea plate China

Connotation and Determinants of Web Collective Intelligence

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science and Information 2022年第6期10卷 633-644页

作者： Lingling ZHANG Hanbin TANG minghui zhao School of Economics and Management University of Chinese Academy of SciencesBeijing 100190China MOE Social Science Laboratory of Digital Economic Forecasts and Policy Simulation at UCAS Beijing 100190China

With continuous development of network technology, users in network community are promoted to interact deeply, and remarkable web collective intelligence emerges in the process. As a relatively new concept, the connotation of web collective intelligence is preliminarily explored in this paper, where the network community is taken as the environment, expert users as the subject, and web comments as the carrier. Meanwhile, taking Wikipedia as an example, by means of questionnaire survey and structural equation model, a more systematic index system is constructed from the perspective of user characteristics to explore determinants of web collective intelligence quality, and potential influence of user attributes on user behavior.

关键词： web collective intelligence connotation determinants

Fault-controlled regional magmatism and mineral deposition in central Cathaysia——Evidence from ambient noise tomography

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2022年第9期65卷 1715-1735页

作者： Lingmin CAO Huaiyu YUAN Liang zhao minghui zhao Haibo HUANG Tianyao HAO Xuelin QIU Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyInnovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou 510301China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511438China ARC Centre of Excellence for Core to Crust Fluid Systems Department of Earth and Environmental SciencesMacquarie UniversityNorth RydeNSW 2109Australia Centre for Exploration Targeting University of Western AustraliaCrawley PerthWA 6009Australia State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100029China Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Submarine Geosciences Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China

Guangdong Province in the central Cathaysian Block has two world-class metallogenic belts, namely, the Nanling and Southeastern Coastal Metallogenic Belts(NLMB and SCMB), which are spatially coincide with the major regional Ganjiang and Zhenghe-Dapu Fault Zones(GJFZ and ZDFZ). However, what roles the faults played in mineral deposition and magmatism is unclear. Using ambient noise tomography, we obtain a 3-D whole-crust shear wave velocity model. By combining available regional geophysical models, we characterize the architecture of the regional shallow lithosphere and infer its possible tectonic connection to magmatic sources, pathways and surface deposition. The results show that the study area is loosely divided by the two major faults, the GJFZ and ZDFZ, into distinct velocity domains. In the north high Vand low V/Vcrust in the NLMB imply crustal remelting, which leads to the general felsic composition. In the coastal area, the lower crustal high Vanomaly is attributed to upwelling melts associated with Cretaceous magmatic activity. Between mineral belts, a swath of crustal lowvelocity zones extend into the uppermost mantle, manifesting partial melting related to upwelling magmas that may hint at a deep origin of magma from subcrustal lithosphere and likely feed surface mineral deposits through major faults. Secondary NW-trending faults coincide with low velocities and facilitated magmatic migration. A correlation between coastward extension of low velocities and younging of the Jurassic and Cretaceous magmatism is suggestive of a combined effect of slab rollback and a change in the direction of the Paleo-Pacific subduction system. We speculate a regional fault-control model in the central Cathaysian Block for the spatial-temporal evolution of regional deformation and magmatism during the middle Mesozoic.

关键词： Ambient noise tomography Crustal Vs structure Ganjiang Fault Zone Zhenghe-Dapu Fault Zone Mesozoic magmatism

Seismic phases from the Moho and its implication on the ultraslow spreading ridge

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2013年第12期32卷 75-86页

作者： ZHANG Jiazheng zhao minghui QIU Xuelin LI Jiabiao RUAN Aiguo Key Laboratory of Marginal Sea Geology of Chinese Academy of Sciences South China Sea Institute of OceanologyChinese Academy of Sciences University of Academy of Sciences The Second Institute of Oceanography State Oceanic Administration

The Moho interface provides critical evidence for crustal thickness and the mode of oceanic crust accretion. The seismic Moho interface has not been identified yet at the magma-rich segments （46°-52°E） of the ultra- slow spreading Southwestern Indian Ridge （SWIR）. This paper firstly deduces the characteristics and do- mains of seismic phases based on a theoretical oceanic crust model. Then, topographic correction is carried out for the OBS record sections along Profile Y3Y4 using the latest OBS data acquired from the detailed 3D seismic survey at the SWIR in 2010. Seismic phases are identified and analyzed, especially for the reflected and refracted seismic phases from the Moho. A 2D crustal model is finally established using the ray tracing and travel-time simulation method. The presence of reflected seismic phases at Segment 28 shows that the crustal rocks have been separated from the mantle by cooling and the Moho interface has already formed at zero age. The 2D seismic velocity structure across the axis of Segment 28 indicates that detachment faults play a key role during the processes of asymmetric oceanic crust accretion.

关键词： Moho interface seismic phases ultra-slow spreading ridge 2D crustal structure SouthwesternIndian Ridge (SWIR)

Characteristics of PmP phases from earthquakes and their role in crustal tomography:An active volcanic area example,northeastern Japan

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2011年第5期54卷 640-646页

作者： XIA ShaoHong QIU XueLin XU HuiLong zhao minghui SHI XiaoBin Chinese Academy of Sciences Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

Later earthquake-sourced PmP phases have the potential to significantly improve ray coverage and resolution of crustal tomography methods,as their trajectories are quite different from those of shallower P *** paper analyzes the characteristics of later PmP arrival times from earthquakes with different focal *** results show that PmP arrival time differences from earthquakes at a range of focal depths are gradually lowered with increasing *** found that where the first recorded P-wave phase was the intra-crustal refraction phase(Pg),the differences in arrival time between Pg and PmP phases decreased with increasing focal depth at an offset of less than 120 *** the first P-wave phase is the upper mantle refraction phase(Pn),the difference in arrival times between Pn and PmP phases became larger with an increase in focal depth at an offset of more than 150 km.A total of 394 PmP phases and 3356 first P phases were picked from seismograms in the active volcanic area of northeastern Japan,according to the characteristics of calculated arrival times,amplitudes and particle *** were used to investigate the role of PmP phases in crustal tomography beneath an active volcanic *** of the detailed resolution analysis show that the addition of PmP data can improve significantly the resolution of the lower crustal structure in tomographic *** the PmP data were included in the tomographic inversion,the path of upwelling magma,along which a series of low-frequency microearthquakes is clearly distributed,was better *** results suggest that the PmP phase has an important role in detailed crustal tomography.

关键词： PmP phase crustal structure tomography earthquake active volcanoes

The South China Sea is not a mini-Atlantic: plate-edge rifting vs intra-plate rifting

在线全文

学校读者我要写书评

暂无评论

National Science Review 2019年第5期6卷 902-913页

作者： Pinxian Wang Chi-Yue Huang Jian Lin Zhimin Jian Zhen Sun minghui zhao State Key Laboratory of Marine Geology Tongji University Department of Earth Sciences Cheng Kung University Department of Geology and Geophysics Woods Hole Oceanographic Institution Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences

The South China Sea, as ‘a non-volcanic passive margin basin’ in the Pacific, has often been considered as a small-scale analogue of the *** recent ocean drilling in the northern South China Sea margin found, however, that the Iberian model of non-volcanic rifted margin from the Atlantic does not apply to the South China *** this paper, we review a variety of rifted basins and propose to discriminate two types of rifting basins: plate-edge type such as the South China Sea and intra-plate type like the *** not only differ from each other in structure, formation process, lifespan and geographic size, but also occur at different stages of the Wilson *** intra-plate rifting occurred in the Mesozoic and gave rise to large oceans, whereas the plate-edge rifting took place mainly in the mid-Cenozoic, with three-quarters of the basins concentrated in the Western *** a member of the Western Pacific system of marginal seas, the South China Sea should be studied not in isolation on its origin and evolution, but in a systematic context to include also its neighboring counterparts.

关键词： rifting marginal basin passive margin South China Sea Western Pacific subduction

Western fault zone of South China Sea and its physical simulation evidences

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2006年第3期25卷 58-67页

作者： SUN Longtao SUN Zhen ZHAN Wenhuan SUN Zongxun zhao minghui XIA Shaohong Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The western fault zone of the South China Sea is a strike-slip fault system and consists of four typical strike-slip faults. It is the western border of the South China Sea. The formation of the system is due to the extrusion of Indo - China Peninsula caused by the collision of India with Tibet and the spreading of the South China Sea in Cenozoic. There are five episodes of tectonic movement along this fault zone, which plays an important role in the Cenozoic evolution of the South China Sea. By the physical modeling experiments, it can be seen the strike-slip fault undergoes the sinistral and dextral movement due to the relative movement velocity change between the South China Sea block and the Indo - China block. The fault zone controls the evolution of the pull basins locating in the west of the South China Sea.

关键词： western margin of South China Sea fault zone physical modeling experiments

Characteristics of the crustal structure and hypocentral tectonics in the epicentral area of Nan＇ao earthquake （M7.5）, the northeastern South China Sea

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2006年第B12期51卷 95-106页

作者： XU Huilong QIU Xuelin zhao minghui SUN Jinlong ZHU Junjiang Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Faculty of Earth Resources China University of Ge osciences Wuhan 430074 China

1918 Nan’ao earthquake (M7.5) occurred in the northeast coastal areas of Guangdong Province. With the seismogeological survey of the epicentral area and history materials analyses, the earthquake epicenter was estimated to locate in the intersection part of the Binhai fault zone (Littoral) and Huanggangshui fault, which strikes NEE and NW, respectively. The activities of the NEE-striking thrust fault and NW-striking extensional fault that were attributed to 1918 Nan’ao earthquake occurred in the Dongshan Island of the epicentral area; they reflected the focal stress field with compression in NW-SE direction and extension in NE-SW direction. The isoseismal contour of seismic intensity X shows a shape of ‘X’ composed of two mutually overlapping ellipses with two axes striking NEE and NW, respectively, and such shape implies that the occurrence of this earthquake is controlled by a pair of conjugate seismotectonic faults constituted by the NEE-striking Binhai fault zone and the NW-striking Huanggangshui fault. The Binhai fault zone is a dominant seismogenic structure, and the NW-striking Huanggangshui fault is the subdominant one. The onshoreoffshore deep seismic profile that crossed the epicentral area and was perpendicular to the strike of the Binhai fault zone was obtained. According to the analyses of the seismic data, the Binhai fault zone is defined as a low velocity zone with SE dip-slip in thecrustal structure section. The Binhai fault zone is a boundary fault between the South China subplate and South China Sea subplate. The crust structure on the northwest side of Binhai fault zone is a normal continental crust with a thickness of 30 km, and the one on the southeast side of the fault zone is a thinning continental crust with a thickness of 25―28 km. The Binhai fault zone is an important seismogenic fault and also is an earthquake-controlling fault. The intersection part between the Binhai fault zone and the low velocity zone of upper crust is advantageous to

关键词：南海东北部 1918年南澳地震滨海断裂带地壳结构震源构造震中区

Prevalence and treatment of hypertension in China： impacts of 2017 American College of Cardiology/American Heart Association High Blood Pressure Guideline

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2018年第8期63卷 488-493页

作者： Chao Yang Jinwei Wang Bixia Gao Yan Zhang Fang Wang Luxia Zhang minghui zhao Yong Huo Renal Division Department of Medicine Peking University First Hospital Peking University Institute of Nephrology Beijing 100034 China Department of Cardiology Peking University First Hospital Beijing 100034 China Center for Data Science in Health and Medicine Peking University Beijing 100191 China Peking-Tsinghua Center for Life Sciences Beijing 100191 China

The definition, recommended treatment thresholds and targets of hypertension have been updated in the recent 2017 American College of Cardiology/American Heart Association(ACC/AHA) Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults. However,the impacts of this guideline on Chinese population are currently unknown. In this study, we aim to provide updated data in China using criteria from the updated guideline. A multistage, stratified sampling method was used to obtain a representative sample of 50,171 adults aged 18 years and *** was defined as an average systolic blood pressure !130 mm Hg, or an average diastolic blood pressure !80 mm Hg, or self-reported use of antihypertensive medications in past 2 weeks. The weighted prevalence of hypertension was 60.1%(95% confidence interval [CI] 59.3%–61.0%). The treatment rate and recommended treatment rate were 16.8%(95% CI 16.1%–17.6%) and 53.7%(95% CI52.6%–54.9%), respectively; the gap was more prominent among men and participants from rural ***, the adoption of the 2017 ACC/AHA guideline will lead to a substantial increase in both prevalence and number of patients needing treatment in China. The applicability of this guideline should be carefully evaluated based on evidence from Chinese population.

关键词： Guideline Hypertension Prevalence Treatment rate