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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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A Spectral Index for Estimating Soil Salinity in the Yellow River Delta Region of china Using EO-1 Hyperion Data

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Pedosphere 2010年第3期20卷 378-388页

作者： WENG Yong-Ling GONG Peng ZHU Zhi-Liang Department of Surveying and Mapping Engineering College of Transportation Southeast University Nanjing 210096(China) state key laboratory of Remote Sensing Science Institute of Remote Sensing Applications of the Chinese Academy ofSciences and Beijing Normal University Beijing 100101 (China) Department of Environment Science Policy and Management University of California Berkeley CA 94720 (USA) EROS Data Center U.S. Geological Survey Sioux Falls SD 57198 (USA)

Soil salinization is one of the most common land degradation processes. In this study, spectral measurements of saline soil samples collected from the Yellow River Delta region of china were conducted in laboratory and hyperspectral data were acquired from an EO-1 Hyperion sensor to quantitatively map soil salinity in the region. A soil salinity spectral index (SSI) was constructed from continuum-removed reflectance (CR-reflectance) at 2052 and 2203 nm, to analyze the spectral absorption features of the salt-affected soils. There existed a strong correlation (r = 0.91) between the SSI and soil salt content (SSC). Then, a model for estimation of SSC with SSI was established using univariate regression and validation of the model yielded a root mean square error (RMSE) of 0.986 and an R2 of 0.873. The model was applied to a Hyperion reflectance image on a pixel-by-pixel basis and the resulting quantitative salinity map was validated successfully with RMSE = 1.921 and R2 = 0.627. These suggested that the satellite hyperspectral data had the potential for predicting SSC in a large area.

关键词： hyperspectral reflectance soil salt content spectral absorption features

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New paleomagnetic results from the Yangzhuang Formation of the Jixian System, North china, and tectonic implications

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Science Bulletin 2005年第14期 77-83页

作者： WU Huaichun1, ZHANG Shihong1, LI Zheng-Xiang2, LI Haiyan1 & DONG Jin1 1. state key laboratory of geological processes and mineral resources & key laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, china university of Geosci- ences, beijing 100083, china 2. Tectonics Special Research Centre, School of Earth and Geographical Sciences, The university of Western Australia, Crawley, WA 6009, Australia

A paleomagnetic study was carried out on the Yangzhuang Formation （1350 Ma） of the Jixian System in the North china Block （NCB）. Detailed stepwise thermal demagnetization isolated two components. The soft compo- nent （component A） was interpreted as a remagnetization in the recent geomagnetic field. The hard component （compo- nent B） with higher unblocking-temperatures was carried by hematite. Its site-mean direction is D/I = 77.6°/-24.3° （κ = 5.4, α95 = 18.3°, N = 15 sites） before, and D/I = 72.2°/11.5° （κ = 24.6, α95 = 7.9°） after tilt correction. It passes a fold test （Mesozoic folding） at 99% confidence level and reversal test at 95% confidence level. The corresponding pole locates at 17.3°N, 214.5°E （dp = 4.1°, dm = 8.0°）. A best fit of paleo- magnetic poles from the NCB, Baltica, Siberia and the ap- parent polar wander path for Laurentia suggests a long-lived connection between these paleo-continents between1800 and 1350 Ma.

关键词： North china Block Yangzhuang Formation paleomag- netism Mesoproterozoic Rodinia Columbia.

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On the Unusual Holocene Carbonate Sediment in Lake Nam Co,Central Tibet

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Journal of Mountain Science 2009年第4期6卷 346-353页

作者： LI Minghui KANG Shichang ZHU Liping WANG Feiyue WANG Junbo YI Chaolu FANG Xiaomin XIE Manping key laboratory of Tibetan Environment Changes and Land Surface processes Institute of Tibetan Plateau Research CAS Beijing 100085 China state key laboratory of Cryospheric Science CAS Lanzhou 730000 China Department of Environment and Geography and Department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada

In lacustrine sediments,aragonite is a widespread mineral,whereas monohydrocalcite is a rare carbonate mineral. In the cold and high-attitude Xizang (Tibetan) Plateau,where aragonite has been commonly found in lacustrine sediments,there is no aragonite,but low-Mg calcite,monohydrocalcite and trace dolomite. The lake receives solutes primarily from surface runoffs and remains fairly constant water chemistry for a long time. The total CaCO3 percentage in sediments could be controlled by evaporation and inflow of detrital materials. The absence of aragonite is unusual when compared to other lacustrine sediments from the Tibetan Plateau. This could be due to low Ca/Mg ratio,low salinity,low Mg and Ca concentration. Monohydrocalcite might precipitate from the lake water mediated by biological activities. Low-Mg calcite originated from minor ostracoda shell and the precipitation of lake water with biological activities.

关键词： Carbonate minerals Lacustrine sediments Environment change Nam Co Tibet

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Geochemistry of the Middle Dovenian Picritic Rocks of the South Margin of Altay Orogenic Belt: Implications for the Tectonic Setting and Petrogenesis

Geochemistry of the Middle Dovenian Picritic Rocks of the So...

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火山作用与地球层圈演化——全国第四次火山学术研讨会

作者： Zhao Li~1 Zhang Zhaochong~(1,2) Yan Shenghao~3 Chen Bailin~4 Zhou Gang~5 HeYongkang~5 Chai Fengmei~2 He Lixin~5 1. state key laboratory of geological processes and mineral resources, china university of geosciences, beijing 100083 2. Institute of Geology, Chinese Academy of geological Sciences, beijing 100037 3. Institute of mineral resources, Chinese Academy of geological Sciences, beijing 100037 4. Institute of Geomechanics, Chinese Academy of geological Sciences, beijing 100081 5. No. 4 geological Party, Xinjiang Bureau of Geology and resources, Aertai, Xinjiang

＜正＞ The Altay orogenic belt, Xinjiang Uygur Autonomous Region in NW china, represents one of the important sites of juvenile crustal growth during the Phanerozoic time. However, some important issues, e.g., tectonic evolution and petrogenesis, still remain controversial. Two layers of the picritic rocks in the south margin of the Altay orogenic belt, were discovered in the lower part of marine volcanic-sedimentary

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Silurian granulite-facies metamorphism,and coeval magmatism and crustal growth in the Tongbai orogen,central china

Silurian granulite-facies metamorphism,and coeval magmatism ...

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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： WANG Hao~1,WU Yuan-bao~(1,2),GAO Shan~1,ZHANG Hong-fei~1, LIU Xiao-chi~1,GONG Hu-jun~2,PENG Min~3,WANG Jing~4,YUAN Hong-lin~2 1.state key laboratory of geological processes and mineral resources,Faculty of Earth Sciences,china university of geosciences, Wuhan 430074,china 2.state key laboratory of Continental Dynamics,Department of Geology,Northwest university,Xi’an 710069,china 3.Institute of Geophysical and Geochemical Exploration CAGS,Langfang 065000,china 4.Anhui Institute of Geology,Hefei 230001,china

It is intriguing whether the formation of granulite in an orogenic belt is related to magmatism and crustal *** Tongbai orogen is one of the particular areas in the Qinling-Tongbai-Dabie-Sulu orogen that contains both granulites and associated arc magmatic rocks,and thus is an optimal place to address this ***,the formation age and genesis of the granulites and their relations to the magmatic rocks have not yet been well *** situ LA(MC)-ICPMS U-Pb dating,and trace element and Lu-Hf isotope analyses were undertaken on zircon grains from gneiss,granulite,gabbro and granodiorite *** zircons in three granulite samples and a gneiss sample have core-rim *** cores have oval or rounded shapes,oscillatory zones,high Th/U ratios and variable U-Pb ages,suggesting a detrital *** youngest group of the detrital zircons yields a weighted mean pb/U age of(450-±5) Ma,which is interpreted as the maximum depositional age of their protoliths.A major age cluster is ca.450～490 Ma,corresponding to prolonged arc magmatism in the northern Tongbai and Qinling *** group of ages range from 660 to 950 Ma,implying that the Qinling Group

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Filamentous cyanobacteria fossils and their significance in the Permian-Triassic boundary section at Laolongdong,Chongqing

Filamentous cyanobacteria fossils and their significance in ...

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中国科学院地质与地球物理研究所2008学术年会

作者： JIANG HongXia,WU YaSheng~+ & CAI ChunFang key laboratory of mineral resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,beijing 100029,china

The microbial communities blooming immediately after the end-Permian mass extinction represent abnormally extreme environments,and vary in different *** this study,filamentous cyanobacterial biota was found in the strata after the extinction in the famous Permian-Triassic boundary section at Laolongdong,Chongqing,southwest *** thin sections,the filamentous cyanobacterial fossils are below 1 mm in length,and generally taper to one end,with the widest diameter up to 0.08 *** of them are curved,indicating that they are soft in *** walls are composed of cryptocrystalline to microcrystalline *** filaments have round cross section,and are internally filled with micrites and fine sparry calcites,which indicate that the filaments are originally *** are randomly distributed in the rocks,but in some places,they tend to be distributed in radial *** filamentous organisms are morphologically similar to Rivularia of Rivulariaceae,Cyanobacteria Phylum,but with calcified sheaths,and are tentatively regarded as an indeterminate new species in Rivularia:Rivularia *** are photosynthetic autotrophic,and can survive in dysoxic *** blooming of this organism and the absence of other organisms may indicate that the environment was oxygendeficient and shallow,since this photosynthetic autotrophic organism needed to live within photic zone.

关键词： microbial fossil end-Permian Permian-Triassic boundary cyanobacteria Rivularia

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In situ U-Pb dating of xenotime by laser ablation(LA)-ICP-MS

In situ U-Pb dating of xenotime by laser ablation(LA)-ICP-MS

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： LIU ZhiChao~(1,2),WU FuYuan~(1*),GUO ChunLi~3,ZHAO ZiFu~4,YANG JinHui~1 & SUN JinFeng~(1,2) 1 state key laboratory of Litho spheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,beijing 100029,china 2 Graduate university of Chinese Academy of Sciences,beijing 100049,china 3 Institute of mineral Deposits,Chinese Academy of geological Sciences,beijing 100037,china 4 School of Earth and Space Sciences,university of Science and Technology of china,Hefei 230026,china

Xenotime is an ideal mineral for U-Th-Pb isotopic dating because of its relatively high U and Th contents,but typically low concentration of common *** characteristics,and the fact that it is widespread throughout various types of rocks,suggest that the U-Th-Pb dating of xenotime has broad *** of U-Pb dating on xenotime by ion microprobe(such as SHPJMP) have increased in recent years,whereas studies by laser ablation(LA)-ICP-MS are still *** this study,we developed a technique for U-Pb dating of xenotime using the 193 nm ArF laser-ablation system and Agilent 7500a *** evaluate the reliability of our method,a xenotime standard,BS-1,was analyzed and calibrated against another xenotime standard,*** weighted mean Pb/U ages of 510.1±5.2 Ma(2a,n = 21),509.8±4.3 Ma(2 a,n = 21) and 510.0±4.6 Ma(2a,n = 21) were obtained using beam diameters of 16,24 and 32μm,*** ages are identical to those determined by ID-TTMS method(weighted mean Pb/U age of 508.8±1.4 Ma),which supports the reliability of our LA-ICP-MS *** also analyzed xenotimes in leucogranites from South Tibet and granites from Xihuashan in southern china,and obtained accurate and precise ***,we observed systematic differences in Pb/U fractionation among xenotime,monazite and *** matrix-effect resulted in either under-correction or over-correction of fractionation,and thus led to inaccurate ***,a matrix -matched material is required for U-Pb dating of xenotime by LA-ICP-MS.

关键词： xenotime laser ablation(LA)-ICP-MS U-Pb dating

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Overpressuring mechanisms in the Yinggehai Basin,South china Sea

Overpressuring mechanisms in the Yinggehai Basin,South China...

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中国科学院地质与地球物理研究所2003学术年会

作者： XIAORONG LUO～key laboratory of mineral resources,Institute of Geology and Geophysics, Chinese Academy of Sciences,beijing,100029, china WEILIANG DONG～china Offshore Oil Nanhai West Company,Zhanjiang,Guangdong, 524057,china JIHAI YANG～china Offshore Oil Nanhai West Company,Zhanjiang,Guangdong,524057, china WAN YANG～Department of Geology,Wichita state university,Wichita,Kansas,67260

Yinggehai Basin is an elongate Cenozoic rift basin on the northwestern margin of the South china Sea continental *** thick (～17 km) basin fill is characterized by high geothermal gradient and high *** associated with nonequilibrium compaction mainly occurs at depths more than 2800 m at the basin center and more than 4000 m at the basin margin because the shallow-buried Neogene and Quaternary strata lack effective seals. This regional overpressure distribution,however,is disrupted at basin center where high overpressure occurs in permeable formations at a depth as shallow as 1400 m on top of a series of deep-seated faults and *** studied the processes and mechanisms of overpressuring via numerical modeling that couples basin filling, sediment compaction,and thermal and pressure fields to approach the origin of the shallow high *** results indicated that an increase of fluid volume due to natural-gas generation by organic cracking is not large enough to generate the overpressure because of the limited amount of organic *** shallow overpressure has probably been generated *** open faults have served as vertical hydraulic conduits and channeled the deep high pressure into shallow permeable formations.

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Accurate Thermodynamic Model for the Calculation of H2S Solubility in Pure Water and Brines

Accurate Thermodynamic Model for the Calculation of H2S Solu...

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中国科学院地质与地球物理研究所2007学术年会

作者： Zhenhao Duan,~(*,+) Rui Sun,~+ Rong Liu,~(++) and Chen Zhu~§state key laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,beijing,100029,china,Faculty of Earth Sciences,china university of geosciences,Wuhan, 430074,china,and Department of geological Sciences,Indiana university,Bloomington,Indiana 47401

A thermodynamic model calculating the solubility of hydrogen sulfide(HS) in pure water and in aqueous NaCl solutions(0-6 M,273-500 K,0-200 bar) is *** model is based on a specific particle interaction theory for the liquid phase and a highly accurate equation of state for the vapor *** this specific interaction approach,this model is able to predict HS solubility in other systems,such as HS-HO -NaSO,HS-HO-CaCl,HS-HO-KCl,and HS-seawater,without fitting experimental data from these *** of the model predictions with experimental data indicates that the model is within or close to experimental uncertainty,which is about 7%in HS *** model is programmed and can be downloaded from the website:***/*** calculation is also made available on the website:***/*** HS solubility model can be used together with numerical speciation-solubility modeling codes such as PHREEQC to calculate sulfide mineral solubility in HS saturated *** example calculation for galena solubility is given.

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