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Transport network and flow mechanism of shallow ore-bearing magma in Tongling ore cluster area

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Science china Earth Sciences 2006年第4期49卷 397-407页

作者： DENG Jun1,2. WANG Qingfei1,2., HUANG Dinghua3 , WAN Li4, YANG Liqiang1,2.& GAO Bangfei1,2.1. State Key Laboratory of Geological Processes and Mineral resources, china University of Geosciences, {2. 100083, china 2. Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of ministry of Education, china University of Geo- sciences, {2. 100083, china 3. Faculty of Earth Sciences, china University of Geosciences, Wuhan 430074, china 4. School of Mathematics and information Science, Guangzhou University, Guangzhou 510405, china State Key Laboratory of Geological Processes and Mineral resources China University of Geosciences Beijing China Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of ministry of Education China University of Geosciences Beijing China Faculty of Earth Sciences China University of Geosciences Wuhan China School of Mathematics and information Science Guangzhou University Guangzhou China

Abundant studies revealed that shallow intrusions of the Yanshanian epoch resulted in the mass mineralization of the Tongling region. Various evidences showed there existed a concealed magma chamber at ?10 km depth in the middle part of this region during Yanshanian epoch, from which the ore-forming magma was generated and then transported to the superficial layer. Yet the transport network and flow mechanism of the shallow ore-bearing magma, the key problem associ- ated with ore-forming process, was relatively little focused on. Integrate analysis of structural me- chanics, statistical fractal and geological facts suggested that NE trending high-angle fold-related thrust faults and the tessellated basement ones served as the main pathways for the shallow magma’s transporting, moreover, the saddle void spaces among adjacent strata in the folds upon this fault system provided the place for magma’s emplacement. So the folds in the upper part and faults in the lower part of the upper crust constituted the fluid’s transport and emplacement network. During the deformation of geologic body with multi-layer structure, the layers in the upper part tended to fold when received the jacking stress from the lower part, while the lower one inclined to fault undergoing loads of the upper part. And the producing probability of this structure assemblage was highly in- creased in the condition, such as in the Tongling area, that the mechanic rigidity of the lower layers was stronger than that of the upper ones. For the pre-existence of fluid-conducting network, the top magma with high volatile in the magma chamber transported rapidly to the superficial layer in dyking pattern, located in the void spaces of folds, filled and reconstructed them. The sudden drop of pres- sure caused the fluid unmixing from the magma and mass ore-forming elements concentration. Pulse activity of the dyking may be the principal reason why magmatic bodies in the Tongling area were spatially-temporally con

关键词： Tongling, structural network, magma intrusion, fractal, dyke.

Lead-Zinc-Silver Metallogenic Prediction Based on Weights of Evidence Approach:A case Study in Tuotuohe Region,Qinghai,china

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地学前缘 2009年第S1期16卷 177-178页

作者： Yan Sun~(1,2.3),Xunlian Wang~3,Jianping Chen~(1,2.3),Qian Wang~(1,2.3) 1.Institute of High and New Techniques Applied to land resources,{2. University of Geosciences(beijing),beijing 100083, china. 2.beijing Key Laboratory of Development and Research for land resources information,{2. University of Geosciences (beijing),beijing 100083,{2. 3.School of Earth Sciences and resources,{2. University of Geosciences(beijing) beijing 100083,{2.

Tuotuo River region(E91°-E93°,N33°-N 35°) is located in southwest Qinghai Province,*** lies in one of the most important metallogenic belts in china—Northwest Sanjiang Metallogenic Belt,due to which Tuotuo River region can be of very high metal mineral potential not only in Qinghai Province but also *** this research,multisource data sets including geological,geochemical,geophysical, and remotely sensed images were integrated for mineral potential analysis with GIS *** the guidance of regional metallogenic features and deposit-forming geologic anomaly theories,evidential layers were obtained from these sets,which

关键词： Sanjiang metallogenic belt Tuotuo River lead-zinc-silver GIS Weights of Evidence minerogenic prediction

Dense coding scheme using superpositions of Bell-states and its NMR implementation

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Science china(Physics,Mechanics & Astronomy) 2005年第1期48卷 57-67页

作者： ZHANG Jingfu, XIE Jingyi, DENG Zhiwei & LU Zhiheng Key Laboratory for Quantum information and Measurements, Department of Physics, Tsinghua University, beijing 100084,{2. center for Quantum information, Tsinghua University, beijing 100084,{2. Department of Materials Science and Engineering, beijing Normal University, beijing 100875,{2. Testing and Analytical center, beijing Normal University, beijing 100875,{2. Department of Physics, beijing Normal University, beijing 100875,{2. Key Laboratory for Quantum information and Measurements Department of Physics Tsinghua University Beijing 100084 China center for Quantum information Tsinghua University Beijing 100084 China Department of Materials Science and Engineering Beijing 100875 China Testing and Analytical center Beijing Normal University Beijing 100875 China Department of Physics Beijing Normal University Beijing 100875 China

Dense coding using superpositions of Bell-states is proposed. The generalized Grover's algorithm is used to prepare the initial entangled states, and the reverse process of the quantum algorithm is used to determine the entangled state in the decoding measurement. Compared with the previous schemes, the superpositions of two Bell-states are exploited. Our scheme is demonstrated using a nuclear magnetic resonance (NMR)quantum computer. The corresponding manipulations are obtained. Experimental results show a good agreement between theory and experiment. We also generalize the scheme to transmit eight messages by introducing an additional two-state system.

关键词： dense coding, superpositions of Bell-states, generalized Grover's algorithm, nuclear magnetic res-onance, quantum computer.

Control of atmospheric CO_2.concentrations by 2.50: A calculation on the emission rights of different countries

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Science china Earth Sciences 2009年第10期52卷 1447-1469页

作者： DING ZhongLi1, DUAN XiaoNan2. GE QuanSheng3 & ZHANG ZhiQiang4 1 Institute of Geology and Geophysics, Chinese Academy of Sciences, beijing 10002., china 2.The General Office of Chinese Academy of Sciences, beijing 100864, china 3 Institute of Geographic Sciences and Natural resources Research, Chinese Academy of Sciences, beijing 100101, china 4 The Lanzhou Branch of the National Science Library, the Scientific information center for resources and Environment, Lanzhou 730000, china Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China The General Office of Chinese Academy of Sciences Beijing China Institute of Geographic Sciences and Natural resources Research Chinese Academy of Sciences Beijing China The Lanzhou Branch of the National Science Library the Scientific Information Center for Resources and Environment Lanzhou China

This paper is to provide quantitative data on some critical issues in anticipation of the forthcoming international negotiations in Denmark on the control of atmospheric CO2.concentrations. Instead of letting only a small number of countries dominate a few controversial dialogues about emissions reductions, a comprehensive global system must be established based on emissions allowances for different countries, to realize the long-term goal of controlling global atmospheric CO2.concentrations. That a system rooted in "cumulative emissions per capita," the best conception of the "common but differentiated responsibilities" principle affirmed by the Kyoto Protocol according to fundamental standards of fairness and justice, was demonstrated. Based on calculations of various countries' cumulative emissions per capita, estimates of their cumulative emissions from 1900 to 2.05, and their annual emissions allowances into the future (2.06―2.50), a 470 ppmv atmospheric CO2.concentration target was set. According to the following four objective indicators―total emissions allowance from 1900 to 2.50, actual emissions from 1900 to 2.05, emissions levels in 2.05, and the average growth rate of emissions from 1996 to 2.05―all countries and regions whose population was more than 300000 in 2.05 were divided into four main groups: countries with emissions deficits, countries and regions needing to reduce their gross emissions, countries and regions needing to reduce their emissions growth rates, and countries that can maintain the current emissions growth rates. Based on this proposal, most G8 countries by 2.05 had already expended their 2.50 emissions allowances. The accu-mulated financial value based on emissions has reached more than 5.5 trillion US dollars (2. dollars per ton of CO2.. Even if these countries could achieve their ambitious emissions reduction targets in the future, their per capita emissions from 2.06 to 2.50 would still be much higher than those of developing coun

关键词： international negotiations on climate change cumulative emissions per capita emission allowance

Soil erosion in china based on the 2.00 national remote sensing survey

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Journal of Geographical Sciences 2002年第4期12卷 435-442页

作者： XU Feng1,2. GUO Suoyan2. ZHANG Zengxiang1(1. Institute of Remote Sensing Applications, CAS, beijing 100101, china 2. Monitoring {2. of Soil and Water Conservation, ministry of Water resources, beijing 100053, china) Institute of Remote Sensing Applications CAS Beijing China Monitoring center of Soil and Water Conservation Ministry of Water Resources Beijing China

This paper discussed the spatial distribution of soil erosion in china at the end of the 2.th century based on the second national soil erosion survey. The result indicated soil erosion is still the prime environmental problem in china. Soil erosion mainly occurs in the western regions of china, and the slight erosion type, ion the whole, exerts the greatest impact on soil erosion pattern. The distribution of water erosion shows the impact of landforms: slight water erosion mainly in mountainous and hilly areas, and half of violent water erosion on the loess landforms. Farmland, forestland and grassland are the major land use types of slight hydraulic erosion distribution, while the serious hydraulic erosion and slight wind erosion mainly occur on grassland. Thus, the conservation of the grassland is the key to either hydraulic and wind erosion control. The huangmian soil (a major type of cultivated soil developed from loess mother material) is the one facing the most serious threat from soil erosion in chinas soil {12.. Further discussion on the soil erosion distribution still needs more research on the method and relevant data analysis.

关键词： soil erosion spatial distribution remote sensing survey china

A property-based attestation protocol for TCM

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Science china(information Sciences) 2010年第3期53卷 454-464页

作者： FENG DengGuo1,2.& QIN Yu1,2.1State Key Laboratory of information Security, Institute of Software, Chinese Academy of Science, beijing 100190,{2. 2.ational Engineering Research center of information Security, beijing 100190,{2. State Key Laboratory of information Security Institute of Software Chinese Academy of Science Beijing China National Engineering Research center of information Security Beijing China

This paper presents a property attestation protocol for the security chip TCM (trusted cryptographic module) via analyzing the problems of the current property attestation, which is built on the property attestation model with the online trust third party. In the protocol the prover utilizes the zero-knowledge proof by the attribute certificates, configuration commitment and TCM signature, and attests its configuration and status which are compliant with the declarative security property. The protocol is characterized by shorter signature length and lower computations. The security of the protocol is proved at the random oracle model. The protocol can help extend application and improve standard for security chip TCM, and it also has practical value and immediate significance.

关键词： trust computing trust cryptographic module (TCM) property attestation signature of knowl- edge configuration commitment

Volcanic Facies and Their Reservoirs Characteristics in Eastern china Basins

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地学前缘 2009年第S1期16卷 152-153页

作者： Chunshuang Jin~(1,2.,Dewu Qiao~2.Wenli Pan~3 1.Institute of Geology and Geophysics,Chinese Academy of Sciences,beijing 10002.,china. 2.Strategic Research {2. of Oil & Gas resources,ministry of land & resources,beijing 100034,china 3.Geophysical Exploration Research Institute of Huabei Oilfield Company,Renqiu 062.52.china

In these years,the Upper Jurassic andesitic volcanic reservoirs in Erlian basin,the Lower Cretaceous rhyolitic volcanic reservoirs in Songliao Basin,the Cretaceous rhyolitic,and the Paleogene basaltic and trachytic volcanic reservoirs in Bohai Bay Basin,and the basaltic volcanic reservoirs in Subei basin were *** more and more volcanic oil and gas fields being discovered and developed,the volcanic rocks demonstrate a great petroleum potential in eastern basins of *** volcanic facies were identified in these basins,including volcanic conduit facies,explosive facies,effusive facies。

关键词： volcanic rocks volcanic facies reservoirs porosity types

A three-dimensional variational ocean data assimilation system:Scheme and preliminary results

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Science china Earth Sciences 2006年第11期49卷 1212-1222页

作者： ZHU Jiang1,2. ZHOU Guangqing1, YAN Changxiang1, FU Weiwei1 & YOU Xiaobao1,3 1. International center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, beijing 10002.,{2. 2. Jiangsu Key Laboratory of Meteorological Disaster, Nanjing University of information Science and Technology, Nanjing 2.0044,{2. 3. beijing Institute of Applied Meteorology, beijing 10002.,{2. International center for Climate and Environment Sciences Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Jiangsu Key Laboratory of Meteorological Disaster Nanjing University of Information Science and Technology Nanjing China beijing Institute of Applied Meteorology Beijing China

A new 3DVAR-based Ocean Variational Analysis System (OVALS) is developed. OVALS is capable of assimilating in situ sea water temperature and salinity observations and satellite altimetry data. As a component of OVALS, a new variational scheme is proposed to assimilate the sea surface height data. This scheme considers both the vertical correlation of background errors and the nonlinear temperature-salinity relationship which is derived from the generalization of the linear balance constraints to the nonlinear in the 3DVAR. By this scheme, the model temperature and salinity fields are directly adjusted from the altimetry data. Additionally, OVALS can assimilate the temperature and salinity profiles from the ARGO floats which have been implemented in recent years and some temperature and salinity data such as from expendable bathythermograph, moored ocean buoys, etc. A 2.-year assimilation experiment is carried out by using OVALS and the Tropical Pacific circulation model. The results show that the assimilation system may effectively improve the estimations of temperature and salinity by assimilating all kinds of observations. Moreover, the root mean square errors of temperature and salinity in the upper depth less than 42. m reach 0.63℃ and 0.34 psu.

关键词： data assimilation, 3DVAR, sea surface height, ARGO floats.

The quantification of remote sensing

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Science china(Technological Sciences) 2005年第S2期48卷 1-11页

作者： GU Xingfa1,2.3,TIAN Guoliang1,2. LI Xiaowen1,2.& GUO Jianning4 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and beijing Normal University, beijing 100101,{2. 2. The center for National Spaceborne Demonstration, beijing 100101,{2. 3. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 4.{2. center for Resource Satellite Data and Application, beijing 100830,{2. State Key Laboratory of Remote Sensing Science Beijing Normal University Chinese Academy of Sciences Beijing 100101 China center for National Spaceborne Demonstration Beijing 100101 China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France china center for Resource Satellite Data and Application Beijing 100830 China

The paper firstly defined the remote sensing information quantification, analyzed the necessity of developing remote sensing quantification, figured out the application guidelines requirement, and pointed out the importance of quantification research. Then taking the remote sensing application research of CBERS-02.data quantification as the example, the paper described the whole quantification system of “remotely sensed digital signal-radiation information-field parameter inversion”. Finally the paper gave the prospect for the development trend of the quantitative remote sensing.

关键词： remote sensing information quantification CBERS-02 radiometric calibration surface parame- ter reversion.