作者：
Zou, Bin;Wilson, J. Gaines;Zhan, F. Benjamin;Zeng, Yongnian
期刊：
Journal of environmental monitoring : JEM,2009年11(3):475-490 ISSN：1464-0325
通讯作者：
Zou, B
作者机构：
[Zhan, F. Benjamin; Zou, Bin] Texas State Univ, Texas Ctr Geog Informat Sci, Dept Geog, San Marcos, TX 78666 USA.;[Zhan, F. Benjamin] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.;[Zou, Bin; Zeng, Yongnian] Cent S Univ, Sch Infophys & Geomat Engn, Changsha 410086, Hunan, Peoples R China.;[Wilson, J. Gaines] Univ Texas Brownsville, Dept Chem & Environm Sci, Brownsville, TX 78520 USA.
通讯机构：
[Zou, Bin] Cent S Univ, Sch Infophys & Geomat Engn, Changsha 410086, Hunan, Peoples R China.
摘要：
The assessment of personal exposure to air pollution is a critical component of epidemiological studies associating air pollution and health effects. This paper critically reviewed 157 studies over 29 years that utilized one of five categories of exposure methods (proximity, air dispersion, hybrid, human inhalation, and biomarkers). Proximity models were found to be a questionable technique as they assume that closer proximity equates to greater exposure. Inhalation models and biomarker estimates were the most effective in assessing personal exposure, but are often cost prohibitive for large study populations. This review suggests that: (i) factors such as uncertainty, validity, data availability, and transferability related to exposure assessment methods should be considered when selecting a model; and (ii) although an entirely discreet new class of approach is not necessary, significant progress could be made through the development of a 'hybrid' model utilizing the strengths of several existing methods. Future work should systematically evaluate the performance of hybrid models compared to other individual exposure assessment methods utilizing geospatial information technologies (e.g. geographic information systems (GIS) and remote sensing (RS)) to more robustly refine estimates of ambient exposure and quantify the linkages and differences between outdoor, indoor and personal exposure estimates.
作者：
Zhao, Chongbin;Hobbs, B. E.;Hornby, P.;Ord, A.;Peng, Shenglin;Liu, Liangming
期刊：
International Journal for Numerical and Analytical Methods in Geomechanics,2008年32(9):1107-1130 ISSN：0363-9061
通讯作者：
Zhao, CB
作者机构：
[Ord, A.; Hobbs, B. E.; Hornby, P.; Zhao, Chongbin] CSIRO Division of Exploration and Mining, P.O. Box 1130, Bentley, WA 6102, Australia;[Peng, Shenglin; Zhao, Chongbin; Liu, Liangming] Computational Geosciences Research Centre, Central South University, Changsha 410083, China
通讯机构：
[Zhao, Chongbin] Cent S Univ, Computat Geosci Res Ctr, Changsha 410083, Peoples R China.
关键词：
(I ,J) conditions - Analytical solutions - Bench-mark problems - Chemical - Chemical species - Coupled systems - Darcy velocities - Engineering fields - equilibrium concentrations - Finite difference (FD) - Finite element (FE) - Fluid-saturated porous medium - Front propagation - Fundamental mechanisms - Governing equations - In order - instability problems - Linear velocities - molar density - Morphological instabilities - Numerical examples - Numerical procedures - Pore fluid pressure - Porous rocks - Species transport
作者机构：
[Geng, Jianzhen; Hao, Shuang; Li, Huimin] Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China;[Peng, Jiantang; Zhang, Dongliang] School of Geoscience and Info-physics, Central South University, Changsha 410083, China;[Yuan, Shunda; Peng, Jiantang; Zhang, Dongliang] State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, CAS, Guiyang 550002, China;[Yuan, Shunda] MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China;[Yuan, Shunda] State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
通讯机构：
[Yuan, Shunda] CAGS, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China.
关键词：
Age constraints - Cassiterite - Confidence levels - Hunan province - Hunan province , China - ID-TIMS - In-situ - Isochron age - LA-MC-ICP-MS - South China - U-Pb ages - U-Pb dating - U-Pb geochronology - Weighted mean
作者机构：
[Changsheng Cai] Department of Surveying and Geo-informatics, Central South University, Changsha, 410083, China;[Yang Gao] Department of Geomatics Engineering, University of Calgary, Calgary, T2N 1N4, Canada;[Yang Gao] School of Geomatics, Liaoning Technical University, Fuxin, 123000, China
摘要：
A combination of GPS and GLONASS observations can offer improved reliability, availability and accuracy for precise point positioning (PPP). We present and analyze a combined GPS/GLONASS PPP model, including both functional and stochastic components. Numerical comparison and analysis are conducted with respect to PPP based on only GPS or GLONASS observations to demonstrate the benefits of the combined GPS/GLONASS PPP. The observation residuals are analyzed for more appropriate stochastic modeling for observations from different navigation systems. An analysis is also made using different precise orbit and clock products. The performance of the combined GPS/GLONASS PPP is assessed using both static and kinematic data. The results indicate that the convergence time can be significantly reduced with the addition of GLONASS data. The positioning accuracy, however, is not significantly improved by adding GLONASS data if there is a sufficient number of GPS satellites with good geometry.
期刊：
GEOCHIMICA ET COSMOCHIMICA ACTA,1991年55(10):2911-2920 ISSN：0016-7037
通讯作者：
GAO, GQ
作者机构：
[GAO, GQ; LAND, LS] CENT S UNIV TECHNOL,DEPT GEOL,CHANGSA 410012,PEOPLES R CHINA.;[GAO, GQ] UNIV TEXAS,DEPT GEOL SCI,AUSTIN,TX 78713, USA.
通讯机构：
[GAO, GQ] UNIV TEXAS,DEPT GEOL SCI,AUSTIN,TX 78713, USA.
摘要：
Isotopic analyses of 227 limestone samples from the Cambro-Ordovician Arbuckle Group, Oklahoma, document slow secular changes in the chemistry of the limestones. From late Cambrian to early Ordovician, the delta-O-18 values of the limestones increase from -10 parts per thousand to -7 parts per thousand (PDB); delta-C-13 values decrease from 0 parts per thousand to -2 parts per thousand (PDB); and Sr-87/Sr-86 ratios decrease from 0.7091 to 0.7088. The light delta-O-18 values suggest that all Arbuckle limestones underwent diagenetic alteration, probably caused by meteoric water recharged during the development of the overlying, pre-middle Ordovician unconformity. The gradual delta-O-18 increase from late Cambrian to early Ordovician reflects reduced O-18 depletion with decreasing burial temperature during alteration, although the presence of additional primary secular delta-O-18 variation cannot be ruled out. The delta-C-13 and Sr-87/Sr-86 variations, in accord with delta-C-13 and Sr-87/Sr-86 variations in the literature, represent primary secular variations. The variations indicate that the delta-C-13 value and Sr-87/Sr-86 ratio of early Paleozoic surface seawater decreased from late Cambrian to early Ordovician. The delta-C-13 variation during this time period seems to correlate with sea-level variation. Specifically, during sea-level fall, an increase in the rate of oxidation of organic matter caused C-13 depletion of inorganic bicarbonate in seawater. As a result, early Ordovician carbonates, probably deposited during the regression stage of the latest Precambrian to latest early Ordovician cycle, became C-13 depleted, relative to late Cambrian carbonates. The decrease of seawater Sr-87/Sr-86 ratio from late Cambrian to early Ordovician may have resulted from decreased riverine Sr input caused by decreased rate of continental weathering.
期刊：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,2013年10(3):495-499 ISSN：1545-598X
通讯作者：
Qi, SX
作者机构：
[Ma, Jie; Qi, Shengxiang; Tian, Jinwen; Yang, Changcai] Institute for Pattern Recognition and Artificial Intelligence, Huazhong University of Science and Technology, Wuhan, 430074, China;[Tao, Chao] School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China
期刊：
Journal of Power Sources,2013年234:197-200 ISSN：0378-7753
通讯作者：
Chen, QQ
作者机构：
[Zhang, Tingting; Chen, Quanqi; Qiao, Xiaochang] School of Chemistry, Xiangtan University, Xiangtan 411105, China;[Chen, Quanqi; Yang, Jianwen] College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China;[Li, Diquan] School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
作者机构：
[Ding, X. L.; Zhang, L.] Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Kowloon, Hong Kong, Peoples R China.;[Li, Z. W.; Sun, Q.; Hu, J.; Zhu, J. J.] Cent S Univ, Sch Geosci & Infophys, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Li, Z. W.] Cent S Univ, Sch Geosci & Infophys, Changsha 410083, Hunan, Peoples R China.
摘要：
One-dimensional measurement along the Line-Of-Sight (LOS) direction has greatly limited the capability of InSAR technique in the investigation of surface displacements and their dynamics. In recent years, great efforts have been made to resolve complete three-dimensional (3-D) displacements from InSAR measurements. This contribution is intended to provide a systematic review of the progress achieved in this field. Based on an analysis of the InSAR LOS measurements, we first cover two commonly used techniques, i.e., Offset-Tracking and multi-aperture InSAR (MAI), with which the surface displacement in the azimuth direction can be measured together with the LOS displacement. Several methods for mapping 3-D displacements using InSAR measurements are subsequently presented and categorized into three groups: (i) combination of multi-pass LOS and azimuth measurements; (ii) integration of InSAR and GPS data; and (iii) prior information assisted approaches. The strengths and weaknesses of each method are analyzed to show the applicability of each method to specific 3-D displacement mapping cases, in hope to provide a useful guidance in choosing a suitable approach accordingly. Finally, suggestions for resolving the challenging issues and outlook of future research are given. (c) 2014 Elsevier B.V. All rights reserved.
作者：
Feng, GuangCai;Hetland, Eric A.;Ding, XiaoLi;Li, ZhiWei;Zhang, Lei
期刊：
Geophysical Research Letters,2010年37(1):- ISSN：0094-8276
通讯作者：
Feng, GC
作者机构：
[Zhang, Lei; Feng, GuangCai; Ding, XiaoLi] Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Kowloon, Hong Kong;[Hetland, Eric A.] Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109, United States;[Li, ZhiWei] Department of Geomatics, Central South University, Changsha 410083, China
通讯机构：
[Feng, GuangCai] Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Kowloon, Hong Kong, Peoples R China.
摘要：
We infer co-seismic fault slip during the 2008 M-w 7.9 Wenchuan earthquake from interferometric synthetic aperture radar (InSAR) and GPS observations of ground deformation. We use ALOS/PALSAR data from ascending orbits on six tracks, and we do not use data that are strongly affected by ionospheric perturbations. We use a fault model composed of three planar fault segments of the Beichuan fault, and one planar segment representing the parallel Pengguan fault. Maximum thrust-slip is up to 6.7 m near the surface, and occurs in two locations, near Yingxiu in the south and Beichuan in the center of the rupture. Maximum strike-slip is over 4 m, and occurs near Pingtong and Nanba along the northern end of the rupture. We find that the ratio of coseismic thrust-to strike-slip on the Beichuan fault decreases from 1.5 to 0.7 from the SW to the NE. Citation: Feng, G., E. A. Hetland, X. Ding, Z. Li, and L. Zhang (2010), Coseismic fault slip of the 2008 Mw 7.9 Wenchuan earthquake estimated from InSAR and GPS measurements, Geophys. Res. Lett., 37, L01302, doi:10.1029/2009GL041213.
期刊：
JOURNAL OF SEDIMENTARY PETROLOGY,1991年61(2):161-173 ISSN：0022-4472
通讯作者：
GAO, GQ
作者机构：
[GAO, GQ; LAND, LS] CENT S UNIV TECHNOL,DEPT GEOL,CHANGSHA 410012,PEOPLES R CHINA.;[GAO, GQ] UNIV TEXAS,DEPT GEOL SCI,AUSTIN,TX 78713, USA.
通讯机构：
[GAO, GQ] UNIV TEXAS,DEPT GEOL SCI,AUSTIN,TX 78713, USA.
摘要：
Dolomite in the Early Ordovician Cool Creek Formation of the Arbuckle Group, Slick Hills, SW Oklahoma, occurs as massive bodies in sabkha-like sequences. Petrographically, the dolomite displays euhedral to anhedral (and xenotopic), fine- to coarse-crystalline textures. Chemically, it is characterized by nearly stoichiometric composition (Ca1.01Mg0.99[CO3]2) and low delta-O-18 values (-7.6 to -9.9 parts per thousand, PDB), and has a large range of Sr-87/Sr-86 ratios (0.70843 to 0.70894) relative to associated limestone (0.70879 to 0.70897) and coeval Early Ordovician seawater. The Sr-87/Sr-86 ratios of most (65%) dolomite samples fall in the Sr-87/Sr-86 range of coeval seawater. The distribution of Cool Creek dolomite in sabkha-like sequences, coupled with dominant Sr-87/Sr-86 ratios similar to coeval seawater, suggests that the dolomite probably formed initially in a marine environment during early diagenesis. The low delta-O-18 values of the dolomite, however, indicate considerable burial modification. Correlations between texture and geochemistry, as well as among various parameters (Sr, Fe, delta-O-18, and Sr-87/Sr-86), demonstrate that dolomite samples with increased modification are characterized by coarser textures, lower Sr and higher Fe concentrations, and lower delta-O-18 values and Sr-87/Sr-86 ratios. These correlations, along with geochemical comparison with associated limestone, not only suggest that the dolomite was modified by fluids depleted in O-18, but also indicate that the lower Sr-87/Sr-86 ratios of many (35%) dolomite samples relative to Early Ordovician seawater resulted from diagenetic modification. On this basis, we conclude that 1) modification of the dolomite by basin-derived brines can be ruled out, 2) modification by younger seawater, seawater-meteoric mixtures, and fluids derived from early compaction of younger shales is possible, but 3) the dolomite seems most likely to have undergone long-lasting modification by meteoric water which gained low Sr-87/Sr-86 ratios by infiltrating younger carbonates, probably during emergence of the carbonate platform coincident with regional Paleozoic unconformities.
期刊：
International Journal for Numerical and Analytical Methods in Geomechanics,2010年34(17):1767-1796 ISSN：0363-9061
通讯作者：
Zhao, C.(chongbin.zhao@iinet.net.au)
作者机构：
[Ord, A.; Hobbs, B. E.] CSIRO Division of Exploration and Mining, P. O. Box 1130, Bentley, WA 6102, Australia;[Ord, A.; Hobbs, B. E.] School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;[Zhao, Chongbin] Computational Geosciences Research Centre, Central South University, Changsha 410083, China;Computational Geosciences Research Centre, Central South University, Changsha 410083, People's Republic of China
通讯机构：
[Zhao, Chongbin] Cent S Univ, Computat Geosci Res Ctr, Changsha 410083, Peoples R China.
关键词：
nonaqueous phase liquid;residual saturation;NAPL dissolution;front instability;reactive mass transport;porous media
摘要：
This paper deals with the theoretical aspects of nonaqueous phase liquid (NAPL)-dissolution-induced instability in two-dimensional fluid-saturated porous media including solute dispersion effects. After some weaknesses associated with the previous work are analyzed and overcome, a comprehensive dimensionless number, known as the Zhao number, is proposed to represent the main driving force and three controlling mechanisms of an NAPL-dissolution system that has a finite domain. The linear stability analysis is carried out to derive the critical value of the comprehensive dimensionless number of the NAPL-dissolution system in a limit case as the ratio of the equilibrium concentration to the density of the NAPL approaches zero. As a result, a theoretical criterion that can be used to assess the instability of planar NAPL-dissolution fronts in two-dimensional fluid-saturated porous media of finite domains has been established. Not only can the present theoretical results be used for the theoretical understanding of the effect of solute dispersion on the instability of an NAPL-dissolution front in the fluid-saturated porous medium of either a finite domain or an infinite domain, but also they can be used as benchmark solutions for verifying numerical methods employed to simulate detailed morphological evolution processes of NAPL-dissolution fronts in two-dimensional fluid-saturated porous media. Copyright (C) 2009 John Wiley & Sons, Ltd.
期刊：
EARTH AND PLANETARY SCIENCE LETTERS,2012年349:186-197 ISSN：0012-821X
通讯作者：
Sun, Y
作者机构：
[Chen, Youlin] Array Information Technology, Greenbelt, MD, United States;[Sun, Ya; Liu, Jianxin] School of Geosciences and Info-Physics, Central South University, Changsha, China;[Sun, Ya; Liu, Huafeng; Niu, Fenglin] Department of Earth Science, Rice University, Houston, TX, United States
通讯机构：
[Sun, Ya] Cent S Univ, Sch Geosci & Infophys, Changsha, Hunan, Peoples R China.
摘要：
We analyze a large amount of receiver function data recorded by regional seismic networks of the China Earthquake Administration to estimate crustal structure and deformation beneath the southeast margin of the Tibetan plateau and its surrounding areas. We develop a comprehensive analysis method that facilitates robust extraction of azimuthal seismic anisotropy from receiver function data. The method includes an estimate of fast polarization direction and splitting time by a joint analysis of radial and transverse receiver function data, and an evaluation of measurement reliability by statistical and harmonic analysis. We find significant seismic anisotropy with a splitting time of 0.5-0.9 s beneath the SE margin of the Tibetan plateau. Both the splitting time and fast polarization direction are comparable to those estimated from SKS/SKKS data, suggesting that crustal anisotropy is the main cause of shear wave splitting of the SKS/SKKS wave. This also suggests that deformation in the upper mantle is either weak or predominantly vertical, and is obviously different from the one in the crust. A vertical flow in the upper mantle, combined with the observation of a thin lithosphere beneath the study area, leads to the inference that part of the mantle lithosphere may have been removed and is descending into deep mantle. Stations located in the surrounding areas, on the other hand, exhibit very little to no crustal anisotropy. The estimated Moho depth and Vp/Vs ratio also show a distinct difference between the SE Tibetan plateau and the surrounding regions. Stations on the Tibetan plateau have a Vp/Vs ratio of similar to 1.79, which is substantially higher than those measured at the Yunnan-Guizhou (Yungui) plateau (similar to 1.69). Our observations here are consistent with the scenario that the SE Tibet has been built by lower crustal flow. They also suggest that the mantle lithosphere beneath the margin may have been mechanically decoupled from the upper crust. (C) 2012 Elsevier B.V. All rights reserved.
作者机构：
[Qian Zhao, Yu; Hong Wang, Xiao] School of Geosciences and Info-physics, Central South University, Changsha, Hunan 410083, China;[Shih, Frank Y.] College of Computing Sciences, New Jersey Institute of Technology, Newark, NJ 07102, United States;[Fang Wang, Xiao] Ecole Centrale de Lyon, ICJ, UMR5205, F-69134, France
通讯机构：
[Zhao, Yu Qian] Cent S Univ, Sch Geosci & Infophys, Changsha 410083, Hunan, Peoples R China.
摘要：
The usefulness of gravity-based spatial access models is limited because of the uncertainty introduced by the range of values of the impedance coefficient. To solve this problem, this paper proposes the concept of spatial access ratio (SPAR) derived from the enhanced 2-step floating catchment area (E2SFCA) method - a recent extension of the gravity model - to assess potential spatial access. First, a sensitivity assessment is conducted to verify the effectiveness of SPAR and its advantages in overcoming the uncertainty problem. Then, the E2SFCA method and the shortest travel time method are employed to measure potential spatial access to colorectal cancer (CRC) prevention and treatment services in Texas based on data at the census tract level. The socio-demographic and geographic distributions of potential spatial access to CRC services are also examined. The sensitivity assessment reveals substantial fluctuations in the values of the spatial access index calculated directly by the E2SFCA method under different values of the impedance coefficient. However, the values of SPAR remain stable under different values of the coefficient. A comparative analysis indicates that potential spatial access to primary care physicians (PCPs), CRC screening facilities, and oncologists varied among different racial/ethnic and socioeconomic population groups as well as in different geographic regions in Texas. Non-Hispanic blacks, Asians, and people in affluent areas had a geographical advantage in accessing CRC services than other groups. The urban/rural difference was more obvious and serious than those of different racial/ethnic groups and groups with different socio-economic statuses, as metropolitan residents had more than three times the potential spatial access than isolated rural residents. (C) 2011 Elsevier Ltd. All rights reserved.
作者机构：
[Wang, Lifeng; Tan, Liwen] 2 Mental Health Institute, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China;[Tang, Yan; Cao, Fang] Biomedical Engineering Laboratory, School of Geosciences and Info-Physics, Central South University, Changsha, Hunan, 410083, China
通讯机构：
[Tang, Yan] Biomedical Engineering Laboratory, School of Geosciences and Info-Physics, Central South University, Changsha, Hunan, 410083, Peoples Republic of China.
期刊：
Journal of Geochemical Exploration,2010年106(1-3):146-155 ISSN：0375-6742
通讯作者：
Liu, L
作者机构：
[Zhao, Chongbin; Liu, Liangming; Zhao, Yilai] Computational Geosciences Research Centre, Central South University, Changsha 410083, China
通讯机构：
[Liu, Liangming] Cent S Univ, Computat Geosci Res Ctr, Changsha 410083, Hunan, Peoples R China.
会议名称：
6th International GEOFLUIDS Conference on Recent Advances Research on Fluids in Geological Processes
会议时间：
APR 15-18, 2009
会议地点：
Univ Adelaide, Sch Earth & Environm Sci, Adelaide, AUSTRALIA
会议主办单位：
[Liu, Liangming;Zhao, Yilai;Zhao, Chongbin] Cent S Univ, Computat Geosci Res Ctr, Changsha 410083, Hunan, Peoples R China.
关键词：
Computational modeling - Contact zone - Copper ore - Coupled geodynamics - Deep ore exploration - Exploration targets - Geodynamic process - Geological investigation - Geological setting - Mining district - Ore bodies
摘要：
The Tongling-Anqing copper district is an important mature copper skarn mining district in China. To better understand the localization of ore and thus facilitate deep ore exploration, computational modeling is used to investigate the coupled geodynamic processes during the syntectonic cooling of the ore-related intrusion, based on geological investigations of the Tongshan and Anqing deposits. The occurrence of brecciated diorite and skarn clasts in the ore and the sharp zigzag boundary of the ore body indicate that the copper ores were deposited after skarn formation and that they were located in some tensional spaces that are unevenly distributed along the contact zone between the felsic intrusion and sedimentary carbonates. The computational modeling results show that all of the skarn ore bodies are located in dilation zones close to the intrusion's contact, demonstrating the control of the dilation zones on the location of the skarn ore bodies, as a consequence of the coupling of geodynamic processes during the syntectonic cooling of the related intrusions. This recognition is helpful for selecting exploration targets in similar geological settings. Indeed, drilling into a deep dilation zone along the contact has resulted in the discovery of significant ore-body in the depth of the Tongshan mine, as the computational modeling predicted. (C) 2010 Elsevier B.V. All rights reserved.
作者机构：
[Brugger, Joel] Division of Minerals, South Australian Museum, North Terrace, Adelaide SA 5000, Australia;[Schacht, Ulrike] CO2CRC, Australian School of Petroleum, The University of Adelaide, Adelaide SA 5005, Australia;[Schmidt Mumm, Andreas; Brugger, Joel] Centre for Tectonics, Resources and Exploration, The University of Adelaide, Adelaide SA 5005, Australia;[Zhao, Chongbin] Computational Geosciences Research Centre, Central South University, China
通讯机构：
[Mumm, Andreas Schmidt] Univ Adelaide, Ctr Tecton Resources & Explorat, Adelaide, SA 5005, Australia.
会议名称：
6th International GEOFLUIDS Conference on Recent Advances Research on Fluids in Geological Processes
会议时间：
APR 15-18, 2009
会议地点：
Univ Adelaide, Sch Earth & Environm Sci, Adelaide, AUSTRALIA
会议主办单位：
[Mumm, Andreas Schmidt;Brugger, Joel] Univ Adelaide, Ctr Tecton Resources & Explorat, Adelaide, SA 5005, Australia.^[Brugger, Joel] S Australian Museum, Div Minerals, Adelaide, SA 5000, Australia.^[Zhao, Chongbin] Cent S Univ, Computat Geosci Res Ctr, Changsha, Hunan, Peoples R China.^[Schacht, Ulrike] Univ Adelaide, CO2CRC, Australian Sch Petr, Adelaide, SA 5005, Australia.
摘要：
The research of fluids in the earth's crust is greatly benefiting from methodological (analytical) and experimental advances and the rapid development of increasingly powerful numerical modelling systems. New experimental data continuously refine the accuracy of numerical models aiming to quantitatively reconstruct geological processes. Geological modelling programs have moved on from linear or 2-dimensional approaches to integrating 3 or 4D geology with geothermal aspects, fluids flow and reactive transport processes into complex, quantitative scenarios. These combinations of refinement of the data base and advances in computational capacities are the stepping stones for the development of the predictive quality of mineralising models and hydrocarbon migration and accumulation, access to geothermal energy and the sequestration of CO2. This special issue presents a selection of contributions on "Fluids in Geological Processes" following the VIth GEOFLUIDS meeting in Adelaide in 2009, emphasizing on recent developments in the different research trends in this field. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
期刊：
Journal of hazardous materials,2011年190(1-3):980-985 ISSN：0304-3894
通讯作者：
Chai, L.-Y.(liyuan.chai@yahoo.com)
作者机构：
[Huang, Shun-hong] Hunan Research Institute of Nonferrous Metals, 410015, Changsha, Hunan, China;[Zheng, Yu; Wang, Zhen-xing; Yang, Zhi-hui; Chai, Li-yuan; Huang, Shun-hong] Institute of Environmental Science and Engineering, School of Metallurgical Science and Engineering, Central South University, 410083, Changsha, Hunan, China;[Chen, Jian-qun] School of Geosciences and Info-physics, Central South University, 410083. Changsha, Hunan, China
通讯机构：
[Chai, Li-yuan] Cent S Univ, Sch Met Sci & Engn, Inst Environm Sci & Engn, S Lu Shan Rd 932, Changsha 410083, Hunan, Peoples R China.
关键词：
Chinese cabbage - Cr content - Cultivated soils - Dermal contacts - Food intake - Human exposures - Human health risk assessment - Human health risks - Indirect exposure assessment - Industrial sites - Maximum permissible concentration - Plant tissues - Residential site - Site-specific - Water soluble Cr (VI)
摘要：
Previous studies often neglected the direct exposure to soil heavy metals in human health risk assessment. The purpose of this study was to assess the environmental impact and site-specific health risks of chromium (Cr) by both direct and indirect exposure assessment method. Results suggested that total Cr was shown a substantial buildup with a significant increase in the industrial and cultivated soils (averaged 1910 and 986 mg kg(-1), respectively). The Cr contents of vegetables exceeded the maximum permissible concentration by more than four times in every case. Human exposure to Cr was mainly due to dietary food intake in farming locations and due to soil ingestion in both industrial and residential sites. Soil ingestion was the main contributor pathway for direct exposure, followed by inhalation, and then dermal contact. The highest risks of vegetable ingestion were associated with consumption of Chinese cabbage. The results also indicated that plant tissues are able to convert the potentially toxic Cr (VI) species into the non-toxic Cr (III) species. The analyses of human health risks indicated that an important portion of the population is at risk, especially in the industrial site. (C) 2011 Elsevier B.V. All rights reserved.
作者机构：
[Xia, Pengfei; Cai, Changsheng; Dai, Wujiao] Department of Surveying and Geo-informatics, Central South University, 932 Lushan South Road, Changsha, 410083, China;[Liu, Zhizhao] Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, China
通讯机构：
[Liu, Zhizhao] Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Kowloon, Hong Kong, Peoples R China.
关键词：
GPS;Cycle slip;Melbourne-Wubbena linear combination;Forward and backward moving window averaging;Second-order;Time-difference phase ionospheric residual
