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Lead Isotope and Rock geochemistry of Zaibian Mafic-Ultramafic Rock,Southeast Guizhou Province,china

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矿物学报 2009年第S1期29卷 70-70页

作者： LIU Yong-kun1,ZHOU Jia-xi2.HUANG Zhi-long2.WANG Jing-song1,YANG De-zhi1,3,DING wei2.CHEN Yuan-xing1,BAO Guang-ping2.1. The 102.Geological Team,Guizhou Bureau of Exploration and Development of Geology and Mineral Resources,Zunyi 563003,china 2. state key laboratory of ore deposits geochemistry,{2.,chinese academy of science,guiyang 550002,china 3. china University of Geosciences(Wuhan) ,Wuhan 430074,china)

The Zaibian mafic-ultramafic rock is located in the transitional zone of the Yangtze craton and south china fold system,where is the southwest of Jiangnan orogenic belt(Zeng et al.,2.03;Wang et al.,in press).

关键词： Pb rock Lead Isotope and Rock geochemistry of Zaibian Mafic-Ultramafic Rock,Southeast Guizhou Province,china

Advances in geochemical research on nanometer materials

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Progress in Natural science:Materials International 2006年第4期16卷 331-337页

作者： ZHU Xiaoqing and WANG Zhonggang key laboratory of {2. Deposit geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china key laboratory of {2. Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

Important advances have been made in the field of geochemistry since nanometer science and technology were introduced into the field of geoscience. The nanometer particulates have been discovered in naturally-occurring ore deposits, volcano-eruptive materials and geo-gases, and a more detailed exploration of the metallogenic mechanism of endogenic metallic ore deposits has been conducted. It is considered that some ore-forming metals may transport in the form of native particulates. Because they have very strong capabilities of adsorption, adsorption is always regarded as an important mechanism of metallogenesis under supergenic and low temperature conditions. Therefore, a new technology of ore exploration has also been developed. This paper attempts to review the new advances in geochemical research on nanometer materials, as well as its perspectivess.

关键词： nanometer geochemistry adsorption metallogenic theory prospecting method.

Metallogenic mechanisms of super-large Cu and Au deposits in the Dexing region and simulating experiments

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chinese Journal Of geochemistry 2010年第1期29卷 1-14页

作者： WU Xueyi and WANG Zijiang The state key {2. of ore Deposit geochemistry,institute of geochemistry,chinese academy of sciences,guiyang 55002.china The state key {2. of ore Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang China

Based on the results of previous studies and under the direction of the theory of "ore deposit genesis",the authors made use of high temperature and high pressure experimental facilities and conditions at the Tectono-geochemistry Research Room under the {2. key laboratory of ore Deposit geochemistry,institute of geochemistry,chinese academy of sciences,and put the focus on the multi-source of tectonically controlling ore-forming materials,the characteristics of multi-stage and multi-episode hydrothermal activities and mineralization and the characteristics of multi-genesis and multi-ore deposition so as to shed light on the metallogenic mechanisms of super-large Cu and Au *** addition simulating experiments were made on multi-stage and multi-episode tectonic activities and rock and ore deformation,multi-stage and multi-episode tectonic activities and mobilization and migration of ore-forming materials,and multi-stage and multi-episode tectonic activities and superimposition and enrichment of ore-forming *** experimental results showed that under the action of multi-stage and multi-episode tectonic stress the deformation and fragmentation of not only rocks and ores have been intensified,and but also the ore-forming materials originally disbursed in the rocks and ores have been mobilized and migrated and superimposed and *** experimental results also provided the scientific experimental data and grounds for deep-going research on the rules of metallogenesis and geneses of super-large ore deposits in the Dexing region,Jiangxi Province.

关键词：成矿机制模拟实验德兴地区金矿床超大型构造地球化学成矿物质来源国家重点实验室

ANNUAL LAMINATIONS IN THE SEDIMENTS OF HONGFENG LAKE, china

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chinese Geographical science 1996年第4期6卷 375-382页

作者： Wu Fengchang Wan Guojiang(state key {2. of Environmental geochemistry, institute of geochemistry, the chinese academy of sciences, guiyang 550002, PRC) state key {2. of Environmental geochemistry Institute of Geochemistry the Chinese Academy of Sciences Guiyang PRC

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关键词： annual laminations Hongfeng Lake carbonate geochemistry

Enhancing CO2.cycloaddition through ligand functionalization:A case study of UiO-66 metal-organic frameworks

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Mechanical behavior and failure mechanisms of rock bolts subjected to static-dynamic loads

结构化学 2024年第2期43卷 9-12页

作者： Ruowen Liang Chao Zhang guiyang Yan Fujian Province key laboratory of Featured Biochemical and Chemical Materials Ningde Normal UniversityNingde352100PR China state key {2. of Photocatalysis on Energy and Environment Fuzhou University Fuzhou350002PR China state key {2. of Photocatalysis on Energy and Environment Fuzhou University Fuzhou350002PR China

The synthesis of cyclic carbonates from CO2.and epoxides offers a remarkable 100％atomic *** literature describes the CO2.cycloaddition mechanism predominantly as an"epoxide activation"pathway[1].This process can be effectively facilitated by heterogeneous catalysts possessing Lewis acidity,potentially optimising the capture and activation of the epoxide via metal-oxygen ***-organic frameworks(MOFs)have recently garnered attention as new catalysts,credited to their structural adaptability and multifunctional ***,MOFs with exposed metal sites function as Lewis acid sites,thus enhancing the cycloaddition *** numerous researchers emphasize the pivotal role of epoxide activation in the CO2.cycloaddition process,the challenge of activating inherently stable CO2.molecules often remains *** CO2.activation can potentially reduce the energy barriers of the reaction,thereby enhancing the overall *** prior studies on MOFs'catalytic activities for CO2.cycloaddition primarily emphasise their Lewis acidity sites[2.3],with scant attention to the syn-ergistic effects between the Lewis acid and base sites.

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International Journal of Mining science and Technology 2024年第3期34卷 281-288页

作者： Hongpu Kang guiyang Yuan Linpo Si Fuqiang Gao Jinfu Lou Jinghe Yang Shuangyong Dong CCTEG Coal Mining Research InstituteBeijing 100013China state key {2. of Intelligent Coal Mining and Strata Control Beijing 100013China

This study explores the effects of dynamic and static loading on rock bolt performance a key factor in maintaining the structural safety of coal mine roadways susceptible to coal *** a housemade load frame to simulate various failure scenarios,pretension-impact-pull tests on rock bolts were conducted to scrutinize their dynamic responses under varied static load conditions and their failure traits under combined *** experimental results denote that with increased impact energy,maximum and average impact loads on rock bolts escalate significantly under pretension,initiating plastic deformation beyond a certain *** minor reductions in the yield load due to impactinduced damage,pretension aids in constraining post-impact deformation rate and fluctuation degree of rock ***,impact-induced plastic deformation causes internal microstructure dislocation,fortifying the stiffness of the rock bolt support *** magnitude of this fortification is directly related to the plastic deformation induced by the *** findings provide crucial guidance for designing rock bolt support in coal mine roadway excavation,emphasizing the necessity to consider both static and dynamic loads for improved safety and efficiency.

关键词： Rock bolt Pretension Static and dynamic load Impact

Distribution characteristics of iodine in humic acid-high underground water in Inner Mongolia and their relations to IDD disease

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chinese science Bulletin 1999年第S2期44卷 85-86页

作者： YU Xiaoying state key {2. of Environmental geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china state key {2. of Environmental geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE concentrations of iodine in humic acid-high underground water are not low, but the IDD disease isprevailing in some areas and no such disease is reported in some other areas. In order to explore the causes of disease and the factors affecting the concentrations of I in underground water, the author collected51 water samples from the Amengbayingmaodao Farm, Langshan Town, Linghe City of Bameng, ShibaTown of Wuyuan County, Qingshan Town of Wulatiehou Prefecture, and Zhijiliang Village in the suburbsof Hohhot City in the central and western part of Inner Mongolia for investigation. The analytical resultsshow that the water samples were relatively alkaline （pH=7.91 on average）. The average concentrationsof cations vary in the order of Na+>Ca2.> Mg2.>K+ while those of anions follow the decreasing

关键词： iodine humic acid distribution characteristics.

Trace elemental behavior during chemical weathering: A case study of biotite-granitic weathering profile in Longnan, Jiangxi Province, china

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chinese science Bulletin 1999年第S2期44卷 130-132页

作者： MA Yingjun and LIU Congqiang state key {2. of Environmental geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china state key {2. of Environmental geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

THE study of chemical weathering processes can provide significant insight into not only the behavior ofmigration, deposition and accumulation of REEs and other elements (e.g. Au, Fe, Al ), but also themechanism of material cycle on the surface of the earth, especially the relationship between detrital sediments and provenance. Lateritic profiles are widespread in southern china, where two kinds of valuable supergene deposit occur. One is "ion-adsorbed" REE ore deposit; the other is lateritic gold ore deposit. This study is to investigate the mobility and fractionation of major and trace elements and mineralogical variations during chemical weathering of biotite granite in Longnan, Jiangxi Province, china, andto provide significant data for a better understanding of the relationships between weathering of

关键词： chemical weathering trace elements rare earth element fractionation biotite-granite.

Distribution and affecting factors of selenium in soil in the high-Se environment of Yutangba mini-landscape

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chinese science Bulletin 1999年第S2期44卷 46-48页

作者： ZHU Jianming and ZHENG Baoshan state key {2. of Environmental geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china state key {2. of Environmental geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

SELENIUM is an indispensable trace element to human beings and normal animals but if found in excessively high dietary concentrations, it can cause poisoning. The most severe example of selenium poisoning occurred at Yutangba, a typical Se-rich area in china which is situated in the northern part of ShuangheTown about 81 km east of En’shi City of the southwestern Hubei Province and the only place in the worldwhere people suffered from selenosis. In this area selenium is present mainly in the carbonaceoussiliceous rocks and carbonaceous shales of the Upper Permian Maokou Formation 2.0 m north of the Yutangba area. Selenium concentrations in Se-rich carbonaceous siliceous rock samples collected byZheng and Song were estimated at 6 471 mg/kg and 8 390 mg/kg, respectively. However, Yang etal. once collected samples of stone coal in which the maximum Se concentration reached more

关键词： distribution affecting factors selenium soil Hubei.