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| 1 | The gravity field and crustal thickness of Venus显示文摘The gravity and topography of Venus obtained from observations of the Magellan mission, as well as the gravity and topography from our numerical mantle convection model, are discussed in this paper. We used the hypothesis that the geoid of degrees 2–40 is produced by sublithospheric mantle density anomalies that are associated with dynamical process within the mantle. We obtained the model dynamical admittance(the geoid topography ratio based on a convection model) by a numerical simulation of the Venusian mantle convection, and used it to correct the dynamical effect in the calculation of crustal thickness. After deducting the dynamical effect, the thickness of the Venusian crust is presented. The results show that the gravity and topography are strongly correlated with the Venusian mantle convection and the Venusian crust has a significant influence on the topography. The Venusian crustal thickness varies from 28 to 70 km. Ishtar Terra, and Ovda Regio and Thetis Regio in western Aphrodite Terra have the highest crustal thickness(larger than 50 km). The high topography of these areas is thought to be supported by crustal compensation and our results are consistent with the hypothesis that these areas are remnants of ancient continents. The crustal thickness in the Beta, Themis, Dione, Eistla, Bell, and Lada regiones is thin and shows less correlation with the topography, especially in the Atla and Imdr regiones in the eastern part of Aphrodite Terra. This is consistent with the hypothesis that these highlands are mainly supported by mantle plumes. Compared with the crustal thickness calculated with the dynamical effect, our results are more consistent with the crust evolution and internal dynamical process of Venus. | WEI DaiYun YANG An HUANG JinShui | 2014 | Science China Earth Sciences2014，57，9： | 4 |
| 2 | In situ stress state and seismic hazard in the Dayi seismic gap of the Longmenshan thrust belt显示文摘In the Longmenshan thrust belt,the Dayi seismic gap,an area with few earthquakes,is located between the ruptures of the 2008 Wenchuan Earthquake and the 2013 Lushan Earthquake,with a length of approximately 40–60 km.To date,however,the extent of the seismic hazard of the Dayi seismic gap and whether this gap is under high stress are still hotly debated.To further evaluate the seismic hazard of the Dayi seismic gap with regard to stress,two boreholes(1,000 and 500 m deep)were arranged to carry out hydraulic fracturing in situ stress measurement on either side of the Shuangshi-Dachuan fault zone.This zone has a high seismic hazard and the capacity to undergo surface rupture.Through the analogy of this new data with stability analysis using Byerlee’s Law and existing stress measurement data collected before strong earthquakes,the results show that the area surrounding the Shuangshi-Dachuan fault zone in the Dayi seismic gap(Dachuan Town)is in a state of high in situ stress,and has the conditions necessary for friction slip,with the potential hazard of moderate to strong earthquakes.Our results are the first to reveal the in situ stress profile at a depth of 1,000 m in the Dayi seismic gap,and provide new data for comprehensive evaluation of the seismic hazard in this seismic gap,which is of great significance to explore the mechanism of earthquake occurrence and to help mitigate future disaster. | Bing LI Furen XIE Jinshui HUANG Xiwei XU Qiliang GUO Guangwei ZHANG Junshan XU Jianxin WANG Dawei JIANG Jian WANG Lifeng DING | 2022 | Science China Earth Sciences2022，65，7： | 3 |
| 3 | Estimating organic carbon storage in temperate wetland profiles in Northeast China显示文摘 | Wen-Ju Zhang He-Ai Xiao Cheng-Li Tong Yi-Rong Su Wan-sheng Xiang Dao-You Huang J. Keith Syers Jinshui Wu | 2008 | Geoderma2008，，1： | 2 |
| 4 | Numerical studies of the effects of phase transitions on Venusian mantle convection显示文摘This paper presents a study on the effects of phase transitions on the mantle convection of Venus in a three-dimensional(3D)spherical shell domain.Our model includes strong depth-and temperature-dependent viscosity and exothermic phase change from olivine to spinel as well as endothermic phase change from spinel to perovskite.From extensive numerical simulations of the effects of Rayleigh number(Ra),and the Clapeyron slopes and depths of phase changes,we found the following:(1)The endothermic phase change prevents mass flow through the interface.Increasing the absolute value of the Clapeyron slopes decreases radial mass flux and normalized radial mass flux at the endothermic phase boundary,and decreases the number of mantle plumes.In other words,mass flow through the phase boundary decreases.The inhibition influence of phase changes increases,as do convective wavelengths.(2)Increasing Ra also increases the convective wavelength and decreases the number of mantle plumes,but it has less influence on the mass exchange.As Ra increases,the convective vigor increases along with the radial mass flux and the mass flow through the phase boundary;however,the normalized mass flux through the phase boundary varies little with Ra,which is different from the conclusion that increasing Ra will greatly increase the inhibition of mass flow through the phase boundary based on two-dimensional(2D)modeling.(3)Increasing the depth of endothermic phase change will slightly decrease the number of mantle plumes,but has little effect on the mass flow through the phase boundary.Consistent with previous studies,our results show that the phase change from spinel to perovskite could inhibit the mass flow through the phase boundary,but they also show that the buildup of hot materials under the endothermic phase boundary in the 3D model could not be so large as to cause strong episodic overturns of mantle materials,which is quite different from previous 2D studies.Our results suggest that it is difficult for phase changes to cause significant magmatism on Venus;in other words,phase changes may not be the primary cause of catastrophic resurfacing on Venus. | YANG An WENG HuiHui HUANG JinShui | 2015 | Science China Earth Sciences2015，58，10： | 2 |
| 5 | Dynamics in microbial im-mobilization and transformations of phosphorus in highly weathered sub-tropical soil following organic amendments显示文摘 | Wu Jinshui Huang Min Xiao Heai | 2007 | Plant and Soil2007，290，12： | 1 |
| 6 | A compact, portable pulse forming line显示文摘 | Xia Liansheng Zhang Huang Shi Jinshui | 2008 | Rev Sci Instrum2008，79，08： | 1 |
| 7 | Modified method for estimating the organic carbon density of discontinuous soils in peak-karst regions in southwest China显示文摘 | Hua Zheng Yirong Su Xunyang He Lening Hu Jinshui Wu Daoyou Huang Lei Li Cixian Zhao | 2012 | Environmental Earth Sciences2012，，6： | 1 |
| 8 | Preparation andcharacterization of a novel microcapsule-type latent curing agentfor epoxy resin显示文摘 | Xing Suli Yang Jinshui Huang Yalin | 2015 | Mater Design2015，85，： | 1 |
| 9 | A compact, portable pulse forming line显示文摘 | Xia Liansheng Zhang Huang Shi Jinshui | 2008 | Review of Science Instrument2008，79，08： | 1 |
| 10 | Dynamics in microbial immobilization and transformations of phosphorus in highly weathered subtropical soil following organic amendments显示文摘 | Jinshui Wu Min Huang He-Ai Xiao Yi-Rong Su Cheng-Li Tong Dao-You Huang J. Keith Syers | 2007 | Plant and Soil (-)2007，，1： | 1 |
| 11 | A compact,portable pulse forming line显示文摘 | XIA Liansheng ZHANG Huang SHI Jinshui | 2008 | Review of Scientific Instruments2008，79，08： | 1 |
| 12 | Molecular cloning and characterization of rice 6-phosphogluconate dehydrogenase gene that is up-regulated by salt stressa显示文摘 | Ji Huang Hongsheng Zhang Jianfei Wang Jinshui Yang | 2003 | Molecular Biology Reports2003，，4： | 1 |
| 13 | A compact,portable pulse forming line显示文摘 | Xia Liansheng Zhang Huang Shi Jinshui | | 0，，： | 1 |
| 14 | Molecular cloning and characterization of rice 6-phosphogluconate dehydrogenase gene that is up-regulated by salt stressa显示文摘 | Ji Huang Hongsheng Zhang Jianfei Wang Jinshui Yang | 2003 | Molecular Biology Reports2003，，4： | 1 |
| 15 | A compact,portable pulse forming line显示文摘 | Xia Liansheng Zhang Huang Shi Jinshui | 2008 | Rev of Sci Instr2008，79，08： | 1 |
| 16 | Agro-C: A biogeophysical model for simulating the carbon budget of agroecosystems显示文摘 | Yao Huang Yongqiang Yu Wen Zhang Wenjuan Sun Shiliang Liu Jun Jiang Jinshui Wu Wantai Yu Yu Wang Zhaofang Yang | 2008 | Agricultural and Forest Meteorology2008，，1： | 1 |
| 17 | Three-dimensional numerical simulation on the coseismic deformation of the 2008 M_S8.0 Wenchuan earthquake in China显示文摘Based on the finite element numerical algorithm,the coseismic displacements of the Wenchuan MS8.0 earthquake are calculated with the rupture slip vectors derived by Ji and Hayes as well as Nishimura and Yaji.Except in a narrow strip around the rupture zone,the coseismic displacements are consistent with those from GPS observation and InSAR interpretation.Numerical results show that rupture slip vectors and elastic properties have profound influences on the surface coseismic deformation.Results from models with different elastic parameters indicate that:①in homogeneous elastic medium,the surface displacements are weakly dependent on Poisson's ratio and independent of the elastic modulus;②in horizontally homogeneous medium with a weak zone at its middle,the thickness of the weak zone plays a significant role on calculating the surface displacements;③in horizontally and vertically heterogeneous medium,the surface displacements depend on both Poisson's ratio and elastic modulus.Calculations of coseismic deformation should take account of the spatial variation of the elastic properties.The misfit of the numerical results with that from the GPS observations in the narrow strip around the rupture zone suggests that a much more complicated rupture model of the Wenchuan earthquake needs to be established in future study. | Feng Li Jinshui Huang | 2010 | Earthquake Science2010，23，2： | 1 |
| 18 | Dynamic changes of gravity fields before and after the 2008 Wenchuan earthquake(Ms8.0)显示文摘The pattern evolution and dynamic mechanism of the dynamic changes of regional gravity fields occurring before and after the Wenchuan Ms8.0 earthquake are analyzed,based on five epochs of 1998-2007 mobile gravity data from the middle-south section of the north-south seismic belt,and two epochs of field research data collected after the 2008 Wenchuan earthquake in combination with GPS data,leveling observations,and geotectonic environment data.The regional dynamic gravity changes demonstrate the effects of the eastward flow of solid matter in the Qinghai-Tibetan plateau and the preparation of the 2008 Wenchuan earthquake(2-10 yr).The two most meaningful gravity indicators of the Wenchuan earthquake preparation are the positive(increasing) gravity changes occurring over many years in the southwest epicenter and the largescale gradient zone of gravity variation,with the cumulative difference between the two sides of the gradient zone of gravity exceeding 200 μGal.The positive gravity changes may facilitate a constant energy accumulation and the gradient belt may support seismic shear breakage.Overall,the gravity changes associated with the earthquake preparation indicate a pattern of accelerating increase-decelerating increase-earthquake occurrence.The Songpan-Ganzi block generally displays a negative gravity change,providing evidence for a local upwarping of the deep crust-mantle and an interior expansion of the deep crust attributable to high temperatures.The viewpoint is consistent with the dilatant mechanism for earthquake preparation. | Shen Chongyang Li Hui Sun Wenke Huang Jinshui Sun Shaoan Xuan Songbai Tan Hongbo Liu Shaoming | 2012 | Geodesy and Geodynamics2012，3，3： | 1 |
| 19 | Influences of across-strike heterogeneous viscosity on the earthquake cycle in a three-dimensional strike-slip fault model显示文摘Geodetic observations have shown that there exist large differences in the viscosity of the deep lithosphere across many large strike-slip faults.Heterogeneity in lithospheric viscosity structure can influence the efficiency of stress transfer and thus may have a significant effect on the earthquake cycle.Until now,how the lateral viscosity variation across strike-slip faults affects the earthquake cycles is still not well understood.Here,we investigate the effects of across-strike viscosity variation on long-term earthquake behaviors with a three-dimensional strike-slip fault model.Our model is a quasi-static model which is controlled by the slip-weakening friction law and powerlaw rheology.By comparing with the reference case,we find that low viscosity on one side of the fault results in a smaller rupture area but with a higher Coulomb stress drop on the ruptured fault region.In addition,low viscosity also leads to a small Coulomb stress accumulation rate.These combined effects increase the earthquake recurrence interval by approximately 10%and the earthquake moments by about 30%when the low viscosity is related to a geothermal gradient of 30 K/km.In addition,across-strike viscosity variation causes asymmetric interseismic ground surface deformation rate.As the viscosity contrast increases,the difference in the interseismic ground surface deformation rate between the two sides of the fault gradually increases,although the asymmetric feature is not pronounced.This asymmetry of interseismic ground deformation rate across a strike-slip fault is supposed to result in asymmetric coseismic deformation if the long-term plate motion velocity is invariant.As a result,this kind of asymmetry of interseismic deformation may influence the evaluation of potential earthquake hazards along large strike-slip faults with lateral viscosity contrast. | Peng Zhai Feng Li Jinshui Huang | 2023 | Earthquake Research Advances2023，3，3： | 0 |
| 20 | Influences of the heterogeneity of viscoelastic medium on postseismic deformation of the 2008 M_(W) 7.9 Wenchuan earthquake显示文摘The study of postseismic deformation is important for constraining the viscoelastic properties of the Earth and inverting the post-earthquake process.The levelling survey revealed that the area near Bei-chuan elevated 5.3 cm about two years after the M_(W) 7.9 Wenchuan earthquake(05/12/2008),during which the area underwent significant downward movement.The GPS horizontal displacements showed a non-monotonic variation after the Wenchuan earthquake.In this study,a 3-D viscoelastic finite element model is employed to simulate the coseismic and postseismic deformation of the Wenchuan earthquake.The numerical simulations show that the lateral heterogeneity across the Longmenshan fault plays an important role in the postseismic displacements.The results reveal that the coseismic defor-mation is not sensitive to the horizontal heterogeneity,but the postseismic deformation is sensitive to it.The postseismic deformation of the horizontally heterogeneous model is generally consistent with the observations of all geodetic surveys,such as GPS,InSAR and levelling,but not for the horizontally homogenous model.We also find that the non-monotonous variation of the postseismic deformation of the Wenchuan earthquake could be explained by a viscoelastic relaxation model with lateral heterogeneous medium across the Longmenshan fault. | Feng Li Peng Zhai Jinshui Huang Hongbo Tan | 2022 | Geodesy and Geodynamics2022，13，1： | 0 |
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