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Element geochemistry and cleaning potential of the No. 11 coal seam from Antaibao mining district

Science china Earth Sciences 2005年第12期48卷 2142-2154页

作者： WANG Wenfeng1, QIN Yong1, SONG Dangyu2, SANG Shuxun1, JIANG Bo1, ZHU Yanming1 & FU Xuehai1 1. College of resources & geosciences, china {3. of Mining and Technology, Xuzhou 221008, china 2. state key laboratory of Coal Combustion, Huazhong {3. of Science and Technology, wuhan 4.3}074. china 1. College of resources & geosciences China University of Mining and Technology 221008 Xuzhou China 2. state key laboratory of Coal Combustion Huazhong University of Science and Technology 430074 Wuhan China

Based on the analyses of sulfur and 4. other elements in 8 channel samples of the No. 11 coal seam from Antaibao surface mine, Shanxi, china and 4.samples from the coal preparation plant of this mine, the distribution of the elements in the seam profile, their geo-chemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied. The conclusions are drawn as follows. The coal-forming environment was probably invaded by sea water during the post-stage of peatification, which results in the fact that the contents of As, Fe, S, etc. associated closely with sea water tend to increase toward the top of the seam, and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof. These elements studied are dominantly associated with kaolinite, pyrite, illite, montmorillonite, etc., of which the As, Pb, Mn, Cs, Co, Ni, etc. are mainly associated with sulfides, the Mo, V, Nb, Hf, REEs, Ta etc. mainly with kaolintie, the Mg, Al etc. mainly with epigenetic montmorillonite, and the Rb, Cr, Ba, Cu, K, Hg, etc. mainly with epigenetic illite. The physical coal cleaning is not only effective in the removal of ash and sulfur, but also in reducing the concentra-tion of most major and trace elements. The elements Be, U, Sb, W, Br, Se, P, etc. are largely or partly organically bound showing a relatively low removability, while the removability of the other elements studied is more than 20%, of which the Mg, Mn, Hg, Fe, As, K, Al, Cs, and Cr associ-ated mostly with the coarser or epigenetic minerals show a higher removability than that of ash. The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes.

关键词： Antaibao mining district, No.11 coal seam, element geochemistry, cleaning.

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Water Security Problem in North china: Research and Perspective

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Pedosphere 2005年第5期15卷 563-575页

作者： XIA Jun LIU Meng-Yu JIA Shao-Feng key laboratory of Water Cycle ＆Related Land Surface processes Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 （China） state key laboratory of Water {3. ＆ Hydropower Engineering Sciences Wuhan University Wuhan 430072（China） Center for Agricultural resources Research Institute of Genetic and Developmental Biology Chinese Academy of Sciences Shijiazhuang 050021 （China）

This paper addresses the emergence of water security problems in North china with the aim of highlighting key waterresources management and water security issues for the long-term development of North china. Three key problemsrelated to water resources and security issues in North china in the 21st century are addressed, namely 1) the watercycle under environmental change, 2) agricultural water saving, and 3. water security. Development of internationalresearch related to these issues is also reviewed. The research plan developed recently by the Chinese Academy of Sciences(CAS) is discussed and suggestions on research and development of water resources science in North china are *** to focus on experimental catchments and dedicated research stations, a detailed knowledge of the water cycle onNorth china farmland has been compiled. A range of techniques that include isotope tracers has been used to acquirehydrologic data. Much research has been devoted to developing distributed hydrological models at different scales. In thewell irrigation district, five different water saving irrigation regimes have been investigated, and these regimes have hadwidespread application, and reduced water use 60-150 mm while they increased water use efficiency (WUE) by 20%-3.%.Furthermore, preventing water pollution is the most essential step to ensure North china’s water security.

关键词： environmental change North china water cycle water resources water security

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Constraints of authigenic carbonates on trace elements (Sr,Mg) of lacustrine ostracod shells in paleoenviron-ment reconstruction and its mechanism

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Science china Earth Sciences 2008年第5期51卷 654-664页

作者： HU Guang1,2, JIN ZhangDong1 & ZHANG Fei3.1 state key laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, {3. 2 Graduate university of the Chinese Academy of Sciences, Beijing 10004., {3. 3.College of resources and Environmental Science, Nanjing Agricultural university, Nanjing 210095, {3. state key laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China Graduate university of the Chinese Academy of Sciences Beijing 100049 China College of resources and Env

Molar ratios of Mg/Ca and Sr/Ca were measured in two species of ostracod shells preserved in the upper core (15–55 m) of the Hequing Basin in Yunnan Province, southwest china. By correlating the molar ratios between Mg/Ca and Sr/Ca and comparing them with Sr concentrations of the sediments, we suggested that: (1) the molar Mg/Ca and Sr/Ca ratio variations in respective ostracod primo reflected the changes in its ambient water composition and ecology; (2) the molar Sr/Ca ratios responded better to the salinity change linearly than Mg/Ca without aragonite precipitation in the system, and otherwise there was no linear relation between them; and (3. the molar Sr/Ca ratios were mainly controlled by salinity and authigenic carbonate precipitation, whereas the molar Mg/Ca ratios were related to both salinity and temperature. In fact, the rate of ostracod growth owing to temperature controls the fluctuation of Mg/Ca in shells. Here, more attentions should be paid to the constraint of authigenic mineral precipitation processes on the trace elements in ostracod shells and to the correlation between these trace elements in biogenic carbonates and compositions of the sediments in systems and in future in vitro experiments.

关键词： ostracod shell molar Sr/Ca ratio molar Mg/Ca ratio environmental response Heqing Basin

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The Cretaceous tectonic event in the Qiangtang Basin and its implications for hydrocarbon accumulation

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Petroleum Science 2010年第4期7卷 466-471页

作者： Li Yalin Wang Chengshan Li Yongtie Ma Chao Wang Licheng Peng Shaonan state key laboratory of {3. {4. and mineral resources Research Center for Tibetan Plateau Geology China University of Geosciences Beijing 100083 China Petroleum Exploration and Development Research Institute PetroChina Beijing 100083 China

The tectonic event during Cretaceous and its relationship with hydrocarbon accumulation in the Qiangtang Basin is discussed based on zircon U-Pb dating and the study of deformation, thermochronology and hydrocarbon formation. LA-ICPMS zircon U-Pb dating indicates that the tectonic event took place during the Early-Late Cretaceous （125-75Ma）. The event not only established the framework and the styles of structural traps in the basin, but also led to the cessation of the first hydrocarbon formation and the destruction of previous oil pools. The light crude oil in the basin was formed during the second hydrocarbon formation stage in the Cenozoic, and ancient structural traps formed during the Cretaceous event are promising targets for oil and gas exploration.

关键词： Qinghai-Tibet plateau Qiangtang Basin tectonic event Cretaceous hydrocarbon accumulation

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Analysis of stability of coal pillars with multi-coal seam strip mining

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中国有色金属学会会刊：英文版 2011年第S3期21卷 549-555页

作者： ZHANG Li-ya, DENG Ka-zhong, ZHU Chuan-guang, XING Zheng-quan Jiangsu key laboratory of resources and Environmental Information Engineering, {3. {4. of Mining and Technology, Xuzhou 221116, {3. Jiangsu key laboratory of resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China

Strip mining is one of the efficient measures to control surface subsidence and mining damage. However, the researches on the laws of the geological mining factors to upper and lower pillar's stability are still deficient in multi-coal seam strip mining at present. Based on the three dimension fast Lagrangian analysis of continua (short for FLAC3.) numerical simulation software, the laws of the stress increasing coefficient on the coal pillar and its stability were systematically studied for different depths, different mining widths, different interlayer spacings, different mining thicknesses, different properties of interstratified rock and the spacial relations of the upper and lower pillars in vertical alignment in multi-coal seam strip mining. The function relation between the stress increasing coefficient of upper and lower pillars with the mining depth, mining widths, interlayer spacing, mining thickness, property of interstratified rock and the spatial relationship were obtained.

关键词： multi-coal seam strip mining FLAC3. numerical simulation stability of coal pillar

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Sr-Nd-Pb isotopes of the Early Paleozoic maficultramafic dykes and basalts from South Qinling belt and their implications for mantle composition

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Science china Earth Sciences 2007年第9期50卷 1293-1301页

作者： ZHANG ChengLi1,2, GAO Shan1, 2, YUAN HongLin1, ZHANG GuoWei1, YAN YunXiang1, LUO JingLan1 & LUO JinHai1 1 state key laboratory of Continental Dynamics, Department of Geology, Northwest {3., Xi’an 710069, {4. 2 state key laboratory of geological Progresses and mineral resources, {4. {3. of {13., {14. 4.3}074. {4. state key laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China state key laboratory of {3. Progresses and {4. resources China University of Geosciences Wuhan 430074 China state key laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China

Late Early Paleozoic mafic-ultramafic dykes and volcanic rocks from the South Qinling belt are char- acterized by εNd( t ) = +3.28― +5.02, (87Sr/86Sr)i= 0.703.1― 0.70555, (206Pb/204.b)i = 17.256― 18.993. (207Pb/204.b)i= 15.505―15.64., (208Pb/204.b)i=3..125―3..968, ?8/4.21.18―774.4.0} ?7/4.8.11―18.82. These charac- teristics suggest that they derived from a Middle Neoproterozoic mantle with isotopic compositions of mixed HIMU, EMII and minor EMI components. We interpret that these rocks were melting products of depleted mantle modified by subducted ancient oceanic crust and continental margin sediments along the northern margin of Yangtze block during Early Neoproterozoic.

关键词： mafic dykes Sr-Nd-Pb isotope mantle source South Qinling belt

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Statistical Prediction of Endogenetic Gold Deposit in East Junggar,Xinjiang

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Journal of Earth Science 1995年第2期14卷 84-91页

作者： Hu Wangliang Lu RuiyingDepartment of Mathematical Geology , china university of geosciences , Beijing 100083.Gao Huaizhong Zhang WangshengInstitute of Geology and {3. resources of Xinjiang , china university of geosciences , wuhan 4.3}074

The system of mineral deposit statistical prediction methods , based on the similarity - analogy theory , searching anomaly theory and the theory of ore - controlling by quantitative assemblage of metallotects , can be summarized into the following aspects : (1) concluding main ore - controlling conditions and ore - hunting indicators from typical deposits; (2)establishing geological concept model of deposits ; (3.selecting geological variable and dividing study units and granting specific value for each variable; (4. by the use of geological and mathematical geology method , building predication model , delineating prospective area for exploration and estimating the total resources; (5) evaluating the prospecting work . It is good practice to use this system for metallogenic prognosis and regional prospecting of gold deposit in East Junggar , Xinjiang and has achieved great success . As a result , we discovered the Kubusu gold mineralized belt . delineated prospective area - estimated total resources of gold in the belt and found out Kubusu gold deposit .

关键词： gold deposit metallogenic prognosis mathematical geology East Junggar ,Xinjiang .

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Effects of fluvial processes and human activities on stream macro-invertebrates

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International Journal of Sediment Research 2011年第4期26卷 416-430页

作者： Xue-hua DUAN,Zhao-Yin WANG,and Meng-zhen XU 1 Ph.D.,state key laboratory of Hydroscience and Engineering,Tsinghua {3.,Beijing 100084.{4. Jiangyin Water Conservancy and Farm Machinery Bureau,Jiangyin 214.3. {4., 2 Prof,state key laboratory of Hydroscience and Engineering,Tsinghua {3.,Beijing 100084.{4., 3.Doctoral candidate,state key laboratory of Hydroscience and Engineering,Tsinghua {3.,Beijing 100084.{4., [a] Ph.D. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Jiangyin Water Conservancy and Farm Machinery Bureau Jiangyin 214431 China Tel: 86-*** (M) [b] Prof. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China [c] Doctoral candidate State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China

Benthic macro-invertebrates are vital components of river *** effects of fluvial processes and human activities on the distribution of macro-invertebrates were studied through field investigations and ***-one sampling sites on 3. rivers in china were selected to investigate the structures of macro-invertebrate *** rivers,according to their fluvial conditions,are classified as streams with a stable channel bed,degrading channel bed,aggrading channel bed,and intensive bed load *** structures of macro-invertebrate fauna for the four types of rivers are very *** rivers have a large number of individuals,abundant fauna, and high biodiversity;while the density and taxa richness for degrading rivers are small,and those for aggrading rivers are much less;whereas the ecology of rivers with intensive bed load motion are the *** paper proposes that streambed stability is the primary influential factor shaping the structure of benthic macro-invertebrate *** pollution can obviously result in the decrease of biodiversity,in the simplification of macro-invertebrate structures,and in the distortion of functional feeding group *** a river with high total nitrogen content,the relative abundance of collector-gatherers is high,and that of collector-filterers,scrapers,shredders,and predators are ***,shredders,and predators disappear in severely polluted *** isolation of aquatic habitat results in a distinct decrease of individual numbers and taxa *** result demonstrates that the connectivity of aquatic habitat significantly affects macro-invertebrate assemblages.A practical method to calculate a Habitat Suitability Index(HSI) is proposed,integrating the effects of the primary physical(including biotic and abiotic) and chemical *** biodiversity and taxa richness increase non-linearly with HSI.

关键词： Macro-invertebrate Streambed stability Substratum Isolation Habitat suitability Water pollution

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An accurately delineated Permian-Triassic Boundary in continental successions

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Science china Earth Sciences 2007年第9期50卷 1281-1292页

作者： YIN HongFu1, YANG FengQing2, YU JianXin2, PENG YuanQiao1, WANG ShangYan3.& ZHANG SuXin1 1 laboratory of Biological and Environmental Geology, china university of {3., wuhan 4.0}074. china 2 state key laboratory of geological Process and mineral resources, china university of {3., wuhan 4.0}074. china 3.geological Survey of Guizhou Province, Guiyang 550011, china 1. laboratory of Biological and Environmental Geology China University of Geosciences Wuhan 430074 China 2. state key laboratory of {3. Process and {4. resources China University of Geosciences Wuhan 430074 China 3. geological Survey of Guizhou Province Guiyang 550011 China

The Permian-Triassic Boundary Stratigraphic Set (PTBST), characteristic of the GSSP section of Meishan and widespread in marine Permian-Triassic Boundary (PTB) sequences of South china, is used to trace and recognize the PTB in a continental sequence at Chahe (Beds 66f―68c). Diversified Permian plant fossils extended to the PTBST, and a few relicts survived above that level. Sporomorphs are dominated by fern spores of Permian nature below the PTBST, above which they are replaced by gymnosperm pollen of Triassic aspect. In the nearby Zhejue Section, the continental PTBST is charac- terized by the fungal 'spike' recorded in many places throughout the world. The boundary claybeds (66f and 68a,c) of the PTBST are composed of mixed illite-montmorillonite layers analogous with those at Meishan. They contain volcanogenic minerals such as β quartz and zircon. U/Pb dating of the upper claybed gives ages of 24..5 and 252.6 Ma for Beds 68a and 68c respectively, averaging 250 Ma. In con- trast to the situation in Xinjiang and South Africa, the sediment sequence of the Permian-Triassic tran- sition in the Chahe section (Beds 56―80) become finer upward. Shallowing and coarsening upward is not, therefore, characteristic of the Permian-Triassic transition everywhere. The occurrence of relicts of the Gigantopteris Flora in the Kayitou Fm. indicates that, unlike most marine biota, relicts of this pa- leophytic flora survived into the earliest Triassic. It is concluded that Bed 67 at Chahe corresponds to Bed 27 at Meishan, and that the PTB should be put within the 60-cm-thick Bed 67b④, now put at its base tentatively. This is the most accurate correlation of the PTB in continental facies with that in the marine GSSP.

关键词： Permian-Triassic Boundary, terrestrial sequence, U-Pb age, Chahe section, accuracy

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Introduction to thematic section on hydrodynamic studies of mineralization

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Geoscience Frontiers 2011年第3期2卷 421-422页

作者： Guoxiang Chi Department of Geology,university of Regina, Regina,Saskatchewan,Canada Chunji Xue state key {3. of {4. processes and mineral resources,china university of geosciences, Xueyuan Road 29,Beijing 100083.china Department of Geology University of Regina Regina Saskatchewan Canada state key laboratory of {3. {4. and mineral resources China University of Geosciences Xueyuan Road 29 Beijing 100083 China

1. IntroductionMost metallic mineral deposits formed from hydrothermal fluids, and the mineralization processes include both chemical （e.g., fluid-rock and fluid-fluid interactions） and physical （e.g., fluid flow）... 详细信息

关键词： mineral deposits studies fluid flow chemical processes physical current status understanding interactions knowledge attention research special Zhang topic study Adams four case Cox Chi

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