|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | China's regional transport dominance: Density, proximity, and accessibility显示文摘Transport infrastructure plays an important role in shaping the configuration of spatial socio-economic structures and influences regional accessibility.This paper defines transport dominance from three aspects:quality,quantity,and advantage,measured by density,proximity,and accessibility indices.County is the basic unit for analysis.The results reveal:(1)Transport dominance statistically follows a partial normal distribution.A very few counties,1.4%of the total,have extremely high transport dominance which strongly supports the socio-economic development in these areas.In contrast,one eighth of all counties have poor transport dominance which impedes local socio-economic development to some extent. The remaining areas,about 70%of the counties,have median transport dominance.(2) Transport dominance is spatially unevenly distributed,with values decreasing gradually from the coastal area to the inland area.Areas in the first-highest level of transport dominance are mainly concentrated in the Yangtze River Delta,the Greater Beijing area,and the Pearl River Delta.Areas in the second-highest level are focused in Chengdu,Chongqing,and Wuhan metropolitan areas.Provincial capitals and a few other counties belong to the third-highest level. | JIN Fengjun WANG Chengjin LI Xiuwei WANG Jiao'e | 2010 | Journal of Geographical Sciences2010，20，2： | 58 |
| 2 | Intestinal barrier dysfunction in severe burn injury显示文摘Severe burn injury is often accompanied by intestinal barrier dysfunction,which is closely associated with post-burn shock,bacterial translocation,systemic inflammatory response syndrome,hypercatabolism,sepsis,multiple organ dysfunction syndrome,and other complications.The intestinal epithelium forms a physical barrier that separates the intestinal lumen from the internal milieu,in which the tight junction plays a principal role.It has been well documented that after severe burn injury,many factors such as stress,ischemia/hypoxia,proinflammatory cytokines,and endotoxins can induce intestinal barrier dysfunction via multiple signaling pathways.Recent advances have provided new insights into the mechanisms and the therapeutic strategies of intestinal epithelial barrier dysfunction associated with severe burn injury.In this review,we will describe the current knowledge of the mechanisms involved in intestinal barrier dysfunction in response to severe burn injury and the emerging therapies for treating intestinal barrier dysfunction following severe burn injury. | Wen He Yu Wang Pei Wang Fengjun Wang | 2019 | Burns & Trauma2019，7，1： | 17 |
| 3 | Evolution of regional transport dominance in China 1910-2012显示文摘Transport infrastructure plays an important role in shaping the configuration of spatial socio-economic structures and influencing regional accessibility. Although China's transport infrastructure has been experiencing a rapid development in the last 100 years, there lacks a systematic examination of the complete evolution history of China's transport development, particularly with all kinds of transport modes. This paper first aims to clarify the history of China's transportation from 1910 to 2012, and divides its evolution process into five periods(1911, 1935, 1953, 1981 and 2012) whereby each period represents the preliminary development time for each transport mode. Second, the paper calculates the transport dominance and analyses its spatial distribution in each period, with county as the basic analysis unit. Transport dominance here is defined as an integrated indicator for evaluating regional transport conditions. The results demonstrate the following:(1) areas with relative good transport dominance have expanded from scattered dots such as Tianjin, Shanghai, Guangzhou in 1911 to extensive areas with each provincial city as cores in 2012;(2) transport development is improved by advances in transportation technology. The construction of modern transport infrastructures such as seaports, airports, high-speed rails(HSRs), and freeways lead the expansion of national territorial areas with good and excellent transport dominance and the increase of the value of transport dominance over time;(3) transport dominance is spatially unevenly distributed and exhibits resemblance with the expansion of transport network, which is closely related to China's socio-economic development and policies. | HU Hao WANG Jiaoe JIN Fengjun DING Nan | 2015 | Journal of Geographical Sciences2015，25，6： | 12 |
| 4 | Severe burn injury alters intestinal microbiota composition and impairs intestinal barrier in mice显示文摘Background:The intestinal barrier integrity is crucial for maintaining intestinal homeostasis,and the mechanisms of intestinal barrier disruption induced by burn injury remain obscure.This study was aimed to investigate the changes of intestinal microbiota and barrier function in burned mice to further comprehend the mechanisms of burn-induced intestinal barrier dysfunction.Methods:Samples were from mice inflicted with 30%total body surface area(TBSA)full-thickness burns.The intestinal permeability,tight junction proteins expressions,zonula occludens-1(ZO-1)localization,inflammatory cytokines expressions,and short-chain fatty acids(SCFAs)contents were determined.The microbial community was assessed via 16S rDNA Illumina sequencing.Results:The intestinal permeability was increased after severe burn injury,peaking at 6 h post-burn,with approximately 20-folds of the control(p<0.001).The expression of tight junction proteins(ZO-1,occludin,claudin-1,and claudin-2)was significantly altered(p<0.05).The ZO-1 morphology was dramatically changed following burn injury.The fecal SCFAs’contents(acetate,propionate,butyrate,isobutyrate,and isovalerate)were noticeably declined after burn injury(p<0.05).The expressions of pro-inflammatory cytokines(interleukin(IL)-1βand IL-6)in ileal mucosa were increased,whereas the expressions of anti-inflammatory cytokines(IL-4 and IL-13)were decreased following burn injury(p<0.05).In addition,burned mice showed an alteration of intestinal microbial community,such as decreased diversity,reduced Bacteroidetes abundance,and increased Firmicutes abundance.Conclusions:The severe burn-induced intestinal barrier dysfunction is along with the alterations of microbial community. | Yanhai Feng Yalan Huang Yu Wang Pei Wang Fengjun Wang | 2019 | Burns & Trauma2019，7，1： | 11 |
| 5 | Understanding Relationship Between Accessibility and Economic Growth:A Case Study from China(1990–2010)显示文摘China′s economy and transport infrastructure have both experienced rapid development since 1978, and especially since 1990. Today, China is the second-largest economic entity in terms of GDP and has the largest high-speed rail(HSR) network and the second-largest expressway network in the world. This paper explores the relationship between accessibility and economic growth in China from 1990 to 2010. In the study, the basic research units include 333 prefecture-level cities and four municipalities. We explore a bivariate analysis framework of accessibility and economic growth, and their increase rates, to examine this relationship using long-term panel data. The results indicate that, first, accessibility and economic growth show a significant positive relationship using both cross-section and panel data, while the increase rate in accessibility and GDP indicate no significant relationship using cross-section data and a poor significant relationship using panel data. Second, the distributions of local advantage are uneven. Cities with low local advantage with respect to accessibility and GDP are mainly located in China′s eastern coastal region or the provincial capitals, while those with low local advantage in terms of their increase rates are located in the western region. Third, as China′s economic growth and transport networks have evolved, the distribution of local advantage shows little change in terms of accessibility and GDP, but a greater change in terms of their increase rates, which is largely influenced by the distribution of expressway and HSR networks. | JIAO Jingjuan WANG Jiaoe JIN Fengjun DU Chao | 2016 | Chinese Geographical Science2016，26，6： | 10 |
| 6 | FY-3 satellite Ultraviolet Total Ozone Unit显示文摘FY-3 satellites are Chinese second-generation polar orbit meteorological satellite series. Ultraviolet Total Ozone Unit (TOU) is one of the main payloads on FY-3 satellite and the first instrument for daily global coverage of total ozone monitoring in China. The main purpose of TOU is to measure the Earth backscatter ultraviolet radiation for retrieving daily global map of atmospheric ozone. TOU will provide the important parameters for environmental monitoring, climate forecasting and global climate changing research. At present, the in-orbit testing of TOU has accomplished and won a consummation, and it will be delivered to National Satellite Meteorological Center for the operational phase of the project. In this paper we introduce the instrument of TOU and its measuring principle, in general. We also analyze the recent working status of the instrument, including the sensitivity, measuring precision of solar irradiance, diffuser degradation and wavelength drift. The inversion results show that TOU can provide good global ozone maps, and a comparison with the OMI total ozone product shows that their RMS deviation is about 5%. It is indicated that the satisfied global distribution of total ozone can be obtained through TOU observational data and self-developed inversion method. | WANG YongMei WANG YingJian WANG WeiHe ZHANG ZhongMou LU JianGong FU LiPing JIANG Fang CHEN Ji WANG JiHong GUAN FengJun HUANG FuXiang ZHANG XingYing | 2010 | Chinese Science Bulletin2010，55，1： | 9 |
| 7 | CKIP-1 regulates macrophage proliferation by inhibiting TRAF6-mediated Akt activation显示文摘巨噬细胞在开发,动态平衡,织物修理和免疫起枢轴的作用。巨噬细胞增长被刺激殖民地的因素(M-CSF ) 导致了 Akt 发信号的巨噬细胞支持;然而,这个过程怎么被终止,仍然保持不清楚。这里,我们作为巨噬细胞增长的一个新奇禁止者识别酷蛋白 kinase 2-interacting protein-1 (CKIP-1 ) 。在放松巨噬细胞, CKIP-1 是在由组成地活跃的 GSK3β 的丝氨酸 342 点的 phosphorylated;, Akt 的下游的目标。这 phosphorylation 触发 CKIP-1 的 polyubiquitination 和 proteasomal 降级。在 M-CSF 刺激之上, Akt 被 CSF-1R-PI3K 激活然后使 GSK3β 失去活性;,导致 CKIP-1 和 β 的稳定; -catenin 蛋白质。β -catenin 包括 cyclin D 和 c-Myc 支持增长基因的表示。CKIP-1 与 TRAF6,为连接 K63 的 ubiquitination 要求的 ubiquitin ligase 和 Akt 的血浆膜招募交往,并且终止调停 TRAF6 的 Akt 激活。由这个工具, CKIP-1 在 M-CSF 刺激以后在迟了的阶段明确地禁止巨噬细胞增长。而且, CKIP-1 缺乏在老鼠自发地开发的 vitro 和 CKIP-1 −/− 导致增加的增长和巨噬细胞的减少的 apoptosis 巨噬细胞主导的脾大和 myeloproliferation。一起,这些数据证明 CKIP-1 由禁止调停 TRAF6 的 Akt 激活在巨噬细胞动态平衡的规定起一个关键作用。 | Luo Zhang Yiwu Wang Fengjun Xiao Shaoxia Wang Guichun Xing Yang Li Xiushan Yin Kefeng Lu Rongfei Wei Jiao Fan Yuhan Chen Tao Li Ping Xie Lin Yuan Lei Song Lanzhi Ma Lujing Ding Fuchu He Lingqiang Zhang | 2014 | Cell Research2014，24，6： | 7 |
| 8 | Transportation Development Transition in China显示文摘Scientific development is an invaluable asset to a country.Policies and development modes should be carried out based on scientific findings not only in industry,but also in transportation infrastructure construction.Building an integrated transportation system,which is in line with the national requirements of China and supports sustainable socio-economic development,is a key strategic issue related to building a moderately prosperous society and achieving realistic goals of a medium-level developed country.Based on a systematic review of the advances in China's transportation infrastructure over the last 60 years,this paper explores the main drivers of transportation development,including national policy,transportation structure,investment efficiency,and technological innovation.Analysis shows that China's comprehensive transportation infrastructure construction since 1949 can be divided into five stages initiated by these drivers,which correspond to four transition modes:policy transition,structural transition,efficiency transition,and technology transition.The transition path of China's transportation development shows that the dominant factors have changed,and the interval for each transition has shortened.With the implementation of the '12th Five-Year Plan',China's transportation infrastructure construction is showing some new characteristics and facing a new development transition.Finally,this paper analyzes the trends in transportation development in China and concludes that technological innovation will be the main driving force to increase the transportation supply and service area in the future. | JIN Fengjun DING Jinxue WANG Jiao'e LIU Dong WANG Chengjin | 2012 | Chinese Geographical Science2012，22，3： | 4 |
| 9 | Mantle Branch Structure in the South-Central Segment of the Da Hinggan Mts.,Inner Mongolia and Its Ore-controlling Role显示文摘Mantle branch structure is the third tectonic unit of multiple evolution of a mantle branch. It is not only the main mechanism of intercontinental orogeny, but also an important ore-forming and ore-control structure. Studies on geotectonic evolution, regional geological characteristics and ore-forming and ore-control structures have shown that since the Mesozoic the Da Hinggan Mts. region has entered a typical intercontinental orogenic stage, and it is closely related to mantle branch activities. The south-central segment of the Da Hinggan Mts. is a typical mantle branch structure and possesses obvious magmatic-metamorphic complexes in the core, detachment slip beds in the periphery and overlapped fault depression basins. Moreover, all of these are the principal factors leading to ore formation and ore control in the region. This paper also further explores the mechanism of mineralization in the south-central segment of the Da Hinggan, summaries the rules of mineralization, puts forward the models of mineralization and points out future ore-exploring orientation. | NIU Shuyin SUN Aiqun WANG Baode NIE Fengjun JIANG Sihong SHAO Ji'an GUO Lijun LIU Jianming | 2009 | Acta Geologica Sinica(English Edition)2009，83，6： | 4 |
| 10 | Neuroprotective effect of epigallocatechin-3-gallate on hemisection-induced spinal cord injury in rats显示文摘Epigallocatechin-3-gallate (EGCG),a naturally occurring compound in green tea,has been widely used as an antioxidant agent.In the present study,model rats with acute spinal cord injury were intraperitoneally injected with 25,50,and 100 mg/kg EGCG,and spinal cord ultrastructure,oxidative stress reaction,inflammatory factors,and apoptosis-associated gene expression were observed.Results showed that EGCG attenuated neuronal and axonal injury 24 hours post injury.It also decreased serum interleukin-1β,tumor necrosis factor-α,and intercellular adhesion molecule-1 release,and decreased apoptosis-associated gene expression.Furthermore,it increased the level of the superoxide anion (O2-),superoxide dismutase,and B-cell lymphoma/leukemia-2,and reduced malondialdehyde levels.Furthermore,it reduced the expression of the pro-apoptotic protein Bax.Noticeably,EGCG at the 100 mg/kg dosage exhibited similar effects as methylprednisolone sodium succinate,which has been frequently used for clinical acute spinal cord injury.The results demonstrated that EGCG can significantly inhibit inflammation,suppress oxidation,and reduce apoptosis in acute spinal cord injury. | Fengjun Deng Rubing Li Yingbao Yang Dan Zhou Qian Wang Jiangping Xu | 2011 | Neural Regeneration Research2011，6，6： | 4 |
| 11 | Study on the transverse structures across Taiwan Strait显示文摘The mountain ranges are almost NE- or NNE-trending in mainland and Taiwan island across the strait. But a number of correspondent transverse structures across Taiwan Strait have been identified on the basis of morphology, surface structure, deep seismic survey and gravity field etc. Moreover, it is inferred from the square or/and rectangular shape of the isoseist maps of 8 M≥6 earthquakes occurring in the western foothill plain of Taiwan that there is an apparent segmentation of the Taiwan Island along the N-S orientation. This has been verified from the GPS's results of the ground motions measured during the Chi-Chi earthquake in 1999. As a matter of fact, the transverse structures within the Taiwan Island could be correlated with more salient NW- and EW-trending structures in the mainland of Fujian than in Taiwan. The investigation of the transverse structures across Taiwan Strait is conducive to realizing the geology within the strait. Hence, the tectonic sketch map of the strait as well as mainland and island drawn in this context shows NW- and EW-trending structures for the study area. | MA Zongjin (马宗晋) WANG Chien-Ying (王乾盈) XU Jie (徐杰) NIE Fengjun (聂逢君) ZHANG Jin (张进) | 2002 | Science China Earth Sciences2002，45，12： | 4 |
| 12 | Exploring the network structure and nodal centrality of China’s air transport network: A complex network approach显示文摘 | Jiaoe Wang Huihui Mo Fahui Wang Fengjun Jin | 2010 | Journal of Transport Geography2010，，4： | 3 |
| 13 | Sand particle lift-off velocity measurements and numerical simulation of mass flux distributions in a wind tunnel显示文摘Lift-off velocity of saltating sand particles in wind-blown sand located at 1.0 mm above the sand bed surface was measured using a phase Doppler particle analyzer in a wind tunnel. The results show that the probability distribution of lift-off velocity can be expressed as a lognormal function, while that of lift-off angle follows an exponential function. The probability distribution of lift-off angle conditioned for each lift-off velocity also follows an exponential function, with a slope that becomes steeper with increasing lift-off velocity. This implies that the probability distribution of lift-off velocity is strongly dependent on the lift-off angle. However, these lift-off parameters are generally treated as an independent joint probability distribution in the literature. Numerical simulations were carried out to investigate the effects of conditional versus independent joint probability distributions on the vertical sand mass flux distribution. The simulation results derived from the conditional joint probability distribution agree much better with experimental data than those from the independent ones. Thus, it is better to describe the lift-off velocity of saltating sand particles using the conditional joint probability distribution. These results improve our understanding of saltation processes in wind-blown sand. | XIAO Fengjun DONG Zhibao GUO Liejin WANG Yueshe LI Debiao | 2017 | Journal of Arid Land2017，9，3： | 3 |
| 14 | Late Cretaceous-Cenozoic Multi-Stage Denudation at the Western Ordos Block: Constraints by the Apatite Fission Track Dating on the Langshan显示文摘The apatite fission track dating of samples from the Dabashan(i.e., the Langshan in the northeastern Alxa Block) by the laser ablation method and their thermal history modeling of AFT ages are conducted in this study. The obtained results and lines of geological evidence in the study region indicate that the Langshan has experienced complicated tectonic-thermal events during the the Late Cretaceous-Cenozoic. Firstly, it experienced a tectonic-thermal event in the Late Cretaceous(~90–70 Ma). The event had little relation with the oblique subduction of the Izanagi Plate along the eastern Eurasian Plate, but was related to the Neo-Tethys subduction and compression between the Lhasa Block and Qiangtang Block. Secondly, it underwent the dextral slip faulting in the Eocene(~50–45 Ma). The strike slip fault may develop in the same tectonic setting as sinistral slip faults in southern Mongolia and thrusts in West Qinling to the southwest Ordos Block in the same period, which is the remote far-field response to the India-Eurasia collision. Thirdly, the tectonic thermal event existed in the late Cenozoic(since ~10 Ma), thermal modeling shows that several samples began their denudation from upper region of partial annealing zone(PAZ), and the denudation may have a great relationship with the growth of Qinghai-Tibetan Plateau to the northeast. In addition, the AFT ages of Langshan indicate that the main body of the Langshan may be an upper part of fossil PAZ of the Late Cretaceous(~70 Ma). The fossil PAZ were destroyed and deformed by tectonic events repeatedly in the Cenozoic along with the denudation. | CUI Xianyue ZHAO Qihua ZHANG Jin WANG Yannan ZHANG Beihang NIE Fengjun QU Junfeng ZHAO Heng | 2018 | Acta Geologica Sinica(English Edition)2018，92，2： | 3 |
| 15 | Pattern of hair cell loss and delayed peripheral neuron degeneration in inner ear by a high-dose intratympanic gentamicin显示文摘To gain insights into the ototoxic effects of aminoglycoside antibiotics(AmAn) and delayed peripheral ganglion neuron death in the inner ear.experimental animal models were widely used with several different approaches including AmAn systemic injections,combination treatment of AmAn and diuretics,or local application of AmAn.In these approaches,systemic AmAn treatment alone usually causes incomplete damage to hair cells in the inner ear.Co-administration of diuretic and AmAn can completely destroy the cochlear hair cells,but it is impossible to damage the vestibular system.Only the approach of AmAn local application can selectively eliminate most sensory hair cells in the inner ear.Therefore,AmAn local application is more suitable for studies for complete hair cell destructions in cochlear and vestibular system and the following delayed peripheral ganglion neuron death.In current studies,guinea pigs were unilaterally treated with a high concentration of gentamicin(GM,40 nig/ml) through the tympanic membrane into the middle ear cavity.Auditory functions and vestibular functions were measured before and after GM treatment.The loss of hair cells and delayed degeneration of ganglion neurons in both cochlear and vestibular system were quantified 30 days or 60 days after treatment.The results showed that both auditory and vestibular functions were completely abolished after GM treatment.The sensory hair cells were totally missing in the cochlea,and severely destroyed in vestibular end-organs.The delayed spiral ganglion neuron death 60 days after the deafening procedure was over 50%.However,no obvious pathological changes were observed in vestibular ganglion neurons 60 days post-treatment.These results indicated that a high concentration of gentamycin delivered to the middle ear cavity can destroy most sensory hair cells in the inner ear that subsequently causes the delayed spiral ganglion neuron degeneration.This model might be useful for studies of hair cell regenerations,delayed degeneration of peripheral auditory neurons,and/or vestibular compensation.In addition,a potential problem of ABR recording for unilateral deafness and issues about vestibular compensation are also discussed. | Jintao Yu Dalian Ding Fengjun Wang Haiyan Jiang Hong Sun Richard Salvi | 2014 | Journal of Otology2014，9，3： | 2 |
| 16 | Interferon-γ and Tumor Necrosis Factor-α Synergize to Induce Intestinal Epithelial Barrier Dysfunction by Up-Regulating Myosin Light Chain Kinase Expression显示文摘 | Fengjun Wang W. Vallen Graham Yingmin Wang Edwina D. Witkowski Brad T. Schwarz Jerrold R. Turner | 2005 | The American Journal of Pathology2005，，2： | 2 |
| 17 | Enhancing sensitivity of microbial fuel cell sensors for low concentration biodegradable organic matter detection:Regulation of substrate concentration,anode area and external resistance显示文摘The relatively low sensitivity is an important reason for restricting the microbial fuel cell(MFC)sensors'application in low concentration biodegradable organic matter(BOM)detection.The startup parameters,including substrate concentration,anode area and external resistance,were regulated to enhance the sensitivity of MFC sensors.The results demonstrated that both the substrate concentration and anode area were positively correlated with the sensitivity of MFC sensors,and an external resistance of 210Ωwas found to be optimal in terms of sensitivity of MFC sensors.Optimized MFC sensors had lower detection limit(1 mg/L)and higher sensitivity(Slope value of the linear regression curve was 1.02),which effectively overcome the limitation of low concentration BOM detection.The essential reason is that optimized MFC sensors had higher coulombic efficiency,which was beneficial to improve the sensitivity of MFC sensors.The main impact of the substrate concentration and anode area was to regulate the proportion between electrogens and nonelectrogens,biomass and living cells of the anode biofilm.The external resistance mainly affected the morphology structure and the proportion of living cells of the anode.This study demonstrated an effective way to improve the sensitivity of MFC sensors for low concentration BOM detection. | Yangyang Gao Sha Wang Fengjun Yin Pin Hu Xingzu Wang Yuan Liu Hong Liu | 2021 | Journal of Environmental Sciences2021，33，3： | 2 |
| 18 | Analysis of transportation carbon emissions and its potential for reduction in China显示文摘The transportation industry is an essential sector for carbon emissions mitigation.This paper firstly used the LMDI(Logarithmic Mean Divisia Index)decomposition method to establish factors decomposition model on China's transportation carbon emission.Then,a quantitative analysis was performed to study the factors influencing China's transportation carbon emissions from 1991 to 2008,which are identified as transportation energy efficiency,transportation structure and transportation development.The results showed that:(1)The impact of transportation development on transportation carbon emissions showed pulling function.Its contribution value to carbon emissions remained at high growth since 1991 and showed an exponential growth trend.(2)The impact of transportation structure on transportation carbon emissions showed promoting function in general,but its role in promoting carbon emissions decreased year by year.And with the continuous optimization of transportation structure,the promoting effect decreased gradually and showed the inversed'U'trend.(3)The impact of transportation energy efficiency on transportation carbon emissions showed a function of inhibition before pulling.In order to predict the potential of carbon emission reduction,three scenarios were set.Analysis of the scenarios showed that if greater intensity emission reduction measures are taken,the carbon emissions will reduce by 31.01 million tons by 2015 and by 48.81 million tons by 2020. | Jinxue Ding Fengjun Jin Yuejiao Li Jiao'e Wang | 2013 | Chinese Journal of Population,Resources and Environment2013，11，1： | 2 |
| 19 | Geochemistry and geodynamic significance of the rare-earth mineralized Paleoproterozoic Longwangzhuang granite on the southern margin of the North China Craton显示文摘The Longwangzhuang granite pluton occurs on the southern margin of the North China Craton and consists mainly of biotite syenogranite with aegirine granite being locally distributed.The granites are characterized by high silicon and alkaline contents(SiO2=72.17%-76.82%,K2O+Na2O=8.28%-10.22%,K2O/Na2O>>1),AI(agpaitic index) =0.84-0.95,DI=95-97,ASI(aluminum saturation index)=0.96-1.13,and very high Fe* number(FeO*/(FeO*+Mg)=0.90-0.99),thus the granites are assigned to the metaluminous to weakly peraluminous,alkalic to calc-alkalic ferroan A-type granites.The granites are rich in large ion lithophile elements(LILE),especially high in REE concentrations(REE+Y=854×10-6-1572×10-6);whereas the enrichment of high strength field elements(Nb,Ta,Zr,Hf) is obviously less than that of LILEs,exhibiting mild depletions on trace element spider plots;and the rocks are significantly depleted in Ba,Sr,Ti,and Pb.The low εNd(t) values(-4.5--7.2) and high model ages(2.3-2.5 Ga) of the granites as well as the low εHf(t) values(-1.11--5.26) and high Hf model ages(THf1= 2.1-2.3 Ga,THf2=2.4-2.6 Ga) of zircons from the biotite syenogranite suggest that the granites were probably derived from an enriched mantle source.The zircons from the biotite syenogranite are mainly colorless transparent crystals exhibiting well-developed oscillatory zoning on the cathodoluminescence images with a LA-ICPMS zircon U-Pb age of 1602.1±6.6 Ma(MSWD=0.48).Petrochemical,trace elements,as well as Nd and Hf isotopic compositions of the rocks demonstrate that the granites were formed in a within-plate extensional tectonic regime possibly related to the breakup of the Columbia supercontinent.The granites were most likely formed through extreme fractional crystallization of alkali basaltic magma resulted from partial melting of the mantle,which was fertilized by recycling crustal rocks triggered by the delamination of lithospheric mantle and lower crust following the ~1.8 Ga collision and amalgamation of the North China Craton which is part of the Columbia supercontinent.However,contamination of neo-Archean to Paleoproterozoic crustal rocks during the ascent and emplacement of the magma could not be excluded.Being the youngest known anorogenic magmatism on the southern margin of the North China Craton related to Columbia breakup,it might represent the break off of the North China Craton from Columbia supercontinent at the end of Paleoproterozoic. | Bao, Zhiwei Wang, Qiang Du, Fengjun | 2011 | Chinese Journal Of Geochemistry2011，30，2： | 2 |
| 20 | ndustrial eco-efficiency and its spatial-temporal differentiation in China显示文摘 | Wei YANG Fengjun JIN Chengjin WANG Chen LV | 2012 | Frontiers of Environmental Science & Engineering2012，6，4： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员