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Petrology and mineral chemistry of new ureilites found in Grove Mountains, Antarctica

Progress in Natural Science:Materials International 2008年第4期18卷 431-439页

作者： Bingkui Miaoa,b,, Yangting Linb, Guiqin Wangc, Daode Wangc, Ziyuan Ouyangd a key laboratory of geological Engineering Center of Guangxi Province, Guilin university of Technology, Guilin 541004, china b state key laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, china c key laboratory of Isotope Geochronology and Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, chinad National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, china key laboratory of geological Engineering Center of Guangxi Province Guilin University of Technology Guilin 541004 China state key laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China key laboratory of Isotope Geochronology and Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

Petrography and mineral chemistry of two new ureilites, GRV 021512 and 022931, from the Grove Mountains, Antarctica, are reported in this paper. GRV 021512 exhibits a typical ureilite texture, and consists of 48.3% olivine, 9.4% pigeonite and 38.1% carbo- naceous interstitial material and/or reduction product. GRV 022931 has a cataclastic porphyritic texture, and consists of 19.1% olivine and 14.1% pigeonite embedded in 66.3% carbonaceous interstitial material and/or reduction product. The coarse-grained olivine and pigeonite in both meteorites have homogeneous cores, and they are FeO-rich within the range of the ferroan subgroup (subgroup I) of olivine-pigeonite ureilites. All olivine grains of the meteorites show reduction zones along boundaries and cracks. Abundant diamond coexists with graphite as graphite-rich patches and veins in the carbonaceous interstitial material. Petrogenesis of both meteorites and the origin of diamond are discussed.

关键词： Meteorite Achondrite Ureilite Diamond Antarctica

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Electrochemical properties of Bismuth Doped α-MnO2 Nanorods for Supercapacitor Studies

Electrochemical properties of Bismuth Doped α-MnO2 Nanorods...

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中国颗粒学会超微颗粒专委会2011年年会暨第七届海峡两岸超微颗粒学术研讨会

作者： Yinping Xu~a,Chao Yang~(a,b,*),Lili Gao~a,Xike Tian~(a,b,*) Suxin Zhang~c,Yanxin Wang~b a Faculty of Material Science and Chemistry Engineering,china university of geosciences, wuhan 430074,P R china b School of Environmental Studies,china university of geosciences,wuhan 430074,P R china c state key laboratory of geological processes and mineral resources,china university of geosciences,wuhan,430074,P.R.china

Bismuth doped α-MnO nanorods are synthesized by a simple hydrothermal method based on the redox *** samples are characterized by X-ray diffraction(XRD),Field emission scanning electron microscopy(FE-SEM) and transmission electron microscopy(TEM).Electrochemical properties of the products are evaluated by cyclic voltammetry and galvanostatic charge-discharge *** ours work,the pure MnO nanorods exhibits a relatively low specific capacitance of 87 Fg,whereas the 1%(atomic ratio) Bi-doped MnO exhibits excellent pseudocapacitive behavior with a specific capacitance of 171 Fg and shows a better cycle *** addition,highly stable and reversible performance after 2000 charge-discharge cycles is also demonstrated.

关键词： Manganese dioxide Bismuth Doped Supercapacitor Electrochemical properties hydrothermal

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Thermal stabilization of ordered mesoporous alumina with modification of rare earth

Thermal stabilization of ordered mesoporous alumina with mod...

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中国颗粒学会超微颗粒专委会2011年年会暨第七届海峡两岸超微颗粒学术研讨会

作者： Lili Gao~a,Chao Yang~(a,b*),Yinping Xu~a,Xike Tian~(a,b*) Suxin Zhang~c,Yanxin Wang~b a Faculty of Material Science and Chemistry Engineering,china university of geosciences, wuhan 430074,PR china b School of Environmental Studies,china university of geosciences,wuhan 430074,P R china c state key laboratory of geological processes and mineral resources,china university of geosciences,wuhan,430074,P.R.china

The synthesis of organized mesoporous alumina has exploring new territory for application of this type of materials,particularly as catalysts or catalyst *** specific surface area and thermal stability are the major requirements for alumina as catalyst *** this paper,we report a facile synthesis of ordered and high thermal stability mesoporous alumina doping with La or Ce ions under hydrochloric acid *** stability improvements by rare earth(La and Ce) doping are *** our work,we find that both rare earth doping can effectively stabilize the amorphous walls of alumina *** material presents the ability to maintain the surface area and pore structure upon prolonged heating below 700℃. Further more,as the results shows the modification of La for improving the thermal stability is more effective than ***,Cl does not strongly influence the self-assembly process in the closed system.

关键词： Mesoporous materials Surfaces area rare earth

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Sorption behavior of U(VI), ^(234)U(VI) and ^(238)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in china

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Science china Earth Sciences 2005年第10期48卷 1649-1655页

作者： MIN Maozhong1,2, LUO Xingzhang3, WANG Ju4, JIN Yuanxin4 & WANG Rucheng1 1. Department of Earth Sciences, state key laboratory of mineral Deposit Research, Nanjing university, Nanjing 210093, china 2. Center of Materials Analysis, Nanjing university, Nanjing 210093, china 3. Department of Environmental Science and Engineering, Nanjing university, Nanjing 210093, china 4. Beijing Geology Institute, Nuclear Industry, Beijing 100029, china Nanjing university Nuclear Industry

The first results of sorption experiments of U(VI), 234U(VI) and 238U(VI) onto original (unpurified) fracture-filling clays from No.1 monzonitic granite intrusion, Beishan area, Gansu Province, china are reported. The monzonitic granite intrusion is a potential location for a high-level radwaste (HLW) repository in china. The present experimental results show that the maximum U(VI) sorption reached 92% at near-neutral pH and the distribution coefficient (Kd) was 1226 mL/g. A high sorption capacity of the fracture-filling clays in host rock on radioactive ele-ments is necessary for HLW deep geological disposal repository. No preferential sorption of 234U onto the clays was found. Finally, the sorption of U(VI) onto the clays was also modeled using a surface complexation model.

关键词： HLW geological disposal repository, granite, uranium, radionuclide, clay, sorption.

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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 laboratory of geological 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 geological processes 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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Thermodynamic calculation and modeling of the CH4-H2O fluid inclusions

Thermodynamic calculation and modeling of the CH4-H2O fluid ...

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中国矿物岩石地球化学学会第13届学术年会

作者： MAO Shi-de~1,DUAN Zhen-hao~2 1.state key laboratory of geological processes and mineral resources,and School of Earth Sciences and resources,china university of geosciences,Beijing,100083,china 2.key laboratory of the Earth’s Deep Interior,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029, china

This work reports in detail the application of thermodynamic models or equations of state to the CH-HO fluid inclusions.A general method is presented to calculate the compositions of the CH-HO inclusions using the volume fractions and the dissolution temperatures of CH *** calculate the homogenization pressures and isolines of the CH-HO inclusions,an improved activity-fugacity model is developed to predict the vapor-liquid phase *** phase equilibrium model can predict methane solubility in liquid phase and water content in vapor phase from 273 K to 623 K and from 1 bar to 1000 bar(up to 2000 bar for the liquid phase),within or close to experimental *** to a lot of reliable experimental phase equilibrium data,an average deviation of the water content in the vapor phase and methane solubility in the liquid phase is 4.29%and 3.63%,

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Geochemical Evidence of Gas Sources of CO_2-Rich Cold Springs from Wudalianchi,Northeast china

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Journal of Earth Science 2009年第6期20卷 959-970页

作者：毛绪美王焰新 Oleg V Chudaev 王逊 key laboratory of Biogeology and Environmental Geology of Ministry of Education China University of GeosciencesWuhan Far East geological Institute Russian Academy of Science Institute of Hydrogeology and Engineering Geology of Heilongjiang Province

CO2-rich cold springs occur near the active volcanoes at Wudalianchi （五大连池）, Northeast china. The springs are rich in CO2, with HCO3-as the predominant anion and have elevated contents of total dissolved solid （TDS）（〉1 000 mg/L）, Fe^2＋（〉20 mg/L）, Sr （〉1 mg/L）, and dissolved Si （〉20 mg/L）. The compositions of escaped and dissolved gases of the springs are similar. The δ^13C values of escaped gases and dissolved gases in mineral springs at Wudalianchi vary from -8.77‰ to -4.53‰ and -8.24‰ to -5.26‰, while δ^18O values vary from -10.68‰ to -7.65‰ and -10.30‰ to -8.84‰, respectively, indicating the same upper mantle origin of CO2 of escaped gases and dissolved gases in the springs. Carbon and oxygen isotope fractionations and water-CO2 exchange were weak in the process of groundwater flow. The 4He content exceeds 5 000×10-6 cm^3·STP/mL in escaped gases of the mineral springs, and the 3He/4He ratios of the escaped and dissolved gases vary from 2.64Ra to 3.87Ra and 1.18Ra to 3.30Ra, respectively. It can be postulated that the CO2 of mineral springs deriving from the magma chamber of the upper mantle moves upward to the surface, to increase the content of 4He in the mineral springs and decrease the ratio of 3He/4He. The helium origin of escaped gases in springs can be calculated with the MORB-crust mixing model, but that in the north spring can be better explained with the MORB-crust-air mixing model due to the effect of mixing with surface water. However, dissolved helium in springs, except the north spring, is better explained with the MORB-crust-ASW mixing model.

关键词： δ^13C δ^18O, ^3He/^4He mineral spring CO2 Wudalianchi Northeast china.

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Dalongshan A-type Granite:Petrology,mineralogy,Geochemistry and Its geological Significance

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地学前缘 2009年第S1期16卷 209-209页

作者： Wenshuai Xiang~1,Yangsong Du~2,Yi Cao~2 1.state key laboratory of geological processes and mineral resources,china university of geosciences,Beijing 100083, china. 2.china university of geosciences(Beijing),Beijing 100083,china

The Dalongshan A-type granite belongs to the Anlu (Anqing,Zongyang and Lujiang)A-type granite belt, the rocks of Dalongshan granite are mainly quartz syenite,syenite and alkaline-feldspar granite. mineralogy,petrology and geochemistry features of this granite support the argument that Anlu A-type granites and Luzong shoshonite volcanic rocks belong to the same magma evolution *** A-type granites do not represent ultrapotassic *** to Luzong volcanic rocks,the A-type granites are the end of the shoshonitic magma association.

关键词： A-type granite post-collision Dalongshan Anlu Luzong

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Ore-forming Response to Syndepositional Submarine Volcanism in Langshan-Zhaertai Mesoproterozoic SEDEX Ore Belt, Inner Mongolia, china

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Journal of Earth Science 2000年第3期19卷 108-113页

作者： Peng Runmin Zhai Yusheng Deng Jun Xiao Rongge Wang Jianping Faculty of Earth Sciences and mineral resources, china university of geosciences, Beijing 100083, china

Ore forming process of the Dongshengmiao, Huogeqi, Tanyaokou and Jiashengpan deposits in Langshan Zhaertai Mesoproterozoic SEDEX metallogenic belt is closely related to the syndepositional volcanic activities based on the following facts: (1) The Sm Nd isochron age of the basic volcanic rocks varies from 1 491 Ma to 1 824 Ma (more than or close to the model age of the lead isotope of all sulfide minerals) in these deposits, with ε (Nd, t ) =(3.48-6.40)±0.80, whose REE composition is enriched in LREE and depleted in HREE, indicating that these volcanic rocks were derived from the mantle or lower crust. (2) The REE composition of some Pb Zn Py ores is also enriched in LREE and depleted in HREE. The chondrite normalized REE patterns are similar to those of the basic volcanic rocks. (3) In the lead isotope composition diagram of Doe and Zartman, most of sphalerite, galena, pyrite, pyrrhotite and chalcopyrite are plotted on both sides of the line for the mantle or between the lines for the mantle and lower crust. (4) Cobalt content of some pyrites is much higher than their nickel content ( w (Co)/ w (Ni)= 11.91- 12.19). (5) Some volcanic blocks and debrises have been picked out from some pyrite and pyrrhotite ores. (6) All Zn Pb Cu Fe sulfide orebodies in these deposits occur in the strata overlying the metamorphic volcanic rocks in the only second ore bearing formation. The Jiashengpan deposit lacks in syndepositional volcanic rocks in the host succession, only Pb and Zn occur without Cu, but the Dongshengmiao, Tanyaokou and Huogeqi deposits with syndepositonal volcanic rocks in the host succession contain Cu, indicating the relatively high ore forming temperatures, besides Pb and Zn. The syndepositional volcanic eruption directly supplied some ore forming metals and resulted in the secular geothermal anomaly favorable for the circulation of the submarine convective hydrothermal system, and in the precipitation of deep mineralizing fluids exh

关键词： volcanic activities ore forming response SEDEX deposit Mesoproterozoic Inner Mongolia.

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Use of Spectrographic Analyses to Characterize the Unique Features of Sodic-Lithian and Cesium-Rich Platy Beryl

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地学前缘 2009年第S1期16卷 168-168页

作者： Yan Liu,Jun Deng,Liqiang Yang,Qingfei Wang state key laboratory of geological processes and mineral resources,china university of geosciences,Beijing 100083,china.

Since most beryls are characterized by prismatic configuration and originate from pegmatite and granite,platy beryl is considered especially rare. Therefore,the aims of this study are to determine the spectrographic and chemical characteristics of the platy beryl;examine the relationships between the spectrographic parameters and alkali elements and discuss the possible genesis of its platy habit based

关键词： beryl trace elements ICP vibrational spectroscopy XRD Xuebaoding Mountain

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