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High-pressure synchrotron x-ray diffraction and Raman spectroscopic study of plumbogummite

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Chinese Physics B 2018年第1期27卷 541-546页

作者：康端巫翔袁冠黄圣轩牛菁菁高静秦善 key laboratory of Orogenic Belts and Crustal Evolution Ministry of Education School of Earth and Space SciencesPeking University state key laboratory of geological processes and mineral resources China University of Geosciences

PbA13（PO4）2（OH,H20）6, an important environmental mineral, is in-situ studied by synchrotron x-ray diffraction （XRD） and Raman scattering combined with diamond anvil cells （DACs） at pressures up to - 11.0 GPa and room temper- ature. The XRD results indicate that plumbogummite does not undergo a phase transition between 0 GPa and 10.9 GPa. Moreover, the c axis is more compressible than the a axis, revealing its anisotropic behavior. The pressure-volume data are fitted to the third-order Birch-Murnaghan equation of state to yield the plumbogummite bulk modulus K0 of 68（ I ） GPa and KU of 6.1. The [PO4]3 and [HPO4]2 Raman vibrational modes exhibit scale nearly linearly as a function of pressure. The [PO4]3 stretching modes are generally more sensitive to pressure than the bending modes. The Grfineisen parameters range from -0.07 to 1.19, with an arithmetic mean of approximately 0.39.

关键词： plumbogummite equation of state Grfineisen parameter diamond anvil cell

Relationship Between Organic Matters and Zn-Pb mineralization in the Giant Jinding Zn-Pb Deposit,SW china

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地学前缘 2009年第S1期16卷 163-163页

作者： Yongbao Gao,Chunji Xue,Jiangwei Zhang 1.Xi’an Center,china geological Survey,Xi’an 710054,china. 2.state key laboratory of geological processes and mineral resources,Faculty of Earth Sciences and resources, china University of Geosciences(beijing),beijing 100083,china

The Jinding Zn-Pb deposit,Yunnan Province, southwestern china,represents the youngest,only continental sediment-hosted giant Zn-Pb deposit in the *** kinds of organic matters,such as the kerogen,light-and heavy-oil,hydrocarbon gas, bitumen of different occurrences and maturation,have been observed in recent underground and open pit ***-gas traces and oil-and methane-in-

关键词： organic matter former oil-gas reservoir hydrogen sulfide Jinding Zn-Pb deposit SW china

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

Analysis of the ambiguity of log-constrained seismic impedance inversion

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Petroleum Science 2011年第2期8卷 151-156页

作者： Li Guofa Li Hao Ma Yanyan Xiong Jinliang state key laboratory of Petroleum resources and Prospecting China University of Petroleum (Beijing) Beijing 102249 China key laboratory of Geophysical Prospecting China National Petroleum Corporation Beijing 102249 China Dagang Oil field PetroChina Tianjin 300280 China

Although the ambiguity of seismic inversion is widely recognized in both theory and practice, so far as a concrete inversion example is concerned, there is not any objective, controllable method or any standard for how to evaluate and determine its ambiguity and reliability, especially for the high frequency components beyond the effective seismic frequency band. Taking log-constrained impedance inversion as an example, a new appraisal method is proposed on the basis of analyzing a simple geological model. Firstly, the inverted impedance model is transformed to a reflection coefficient series. Secondly, the maximum effective frequency of the real seismic data is chosen as a cutoff point and the reflection coefficient series is decomposed into two components by low-pass and high-pass filters. Thirdly, the geometrical reflection characteristics of the high-frequency components and that of the real seismic data are compared and analyzed. Then, the reliability of the inverted impedance model is appraised according to the similarity of geometrical characteristics between the high-frequency components and the real seismic data. The new method avoids some subjectivity in appraising the inverted result, and helps to enhance the reliability of reservoir prediction by impedance inversion technology.

关键词： Log-constrained impedance reflection coefficients seismic inversion ambiguity

Gold Distribution in Tellurium-Rich Pyrite and Tellurides from the Xiaoqinling Gold District,Southern Margin of the North china Craton

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矿物学报 2009年第S1期29卷 113-114页

作者： BI Shi-jian1,2,LI Jian-wei1,2,LI Zhan-ke1,2,ZHANG Su-xin1,ZHENG Shu1(1. state key laboratory of geological processes and mineral resources,china University of Geosciences,430074 Wuhan,china 2. Faculty of Earth resources,china University of Geosciences,430074 Wuhan,china)

Gold is commonly associated with arsenic in As-rich pyrite or arsenopyrite in a variety types of gold deposit,such as sediment-hosted gold deposits,epithermal Au-Ag deposits,Au-rich VMS deposits,and mesothermal lode g... 详细信息

关键词： Gold Distribution in Tellurium-Rich Pyrite and Tellurides from the Xiaoqinling Gold District,Southern Margin of the North china

Relationships between bacterial-algal proliferating and mass extinction in the Late Devonian Frasnian-Famennian transition:Enlightening from carbon isotopes and molecular fossils

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Science china Earth Sciences 2005年第10期48卷 1656-1665页

作者： GONG Yiming1,2, XU Ran1, TANG Zhongdao1, SI Yuanlan3 & LI Baohua4 1. Faculty of Earth Science and state key laboratory of geological processes and mineral resources, china University of Geosciences, Wuhan 430074, china 2. Institute of resources & Environments, Henan Polytechnic University, Jiaozuo 454003, china 3. Department of Computer Science, South-Central University for Nationalities, Wuhan 430074, china 4. laboratory of Marine Geology, Tongji University, Shanghai 200092, china Faculty of Earth Science and state key laboratory of geological processes and mineral resources china University of Geosciences Wuhan china Institute of resources & Environments Henan Polytechnic University Jiaozuo china Department of Computer Science South-Central University for Nationalities Wuhan china laboratory of Marine Geology Tongji University Shanghai china

Studies show positive shifts of inorganic and organic carbon isotope values (δ 13Ccarb and δ 13Ckerogen) from +0.43 (‰ V-PDB) to +3.54 (‰ V-PDB) and from ?29.38 (‰ V-PDB) to ?24.14 (‰ V-PDB), respectively, B* (Ba* = Ba/ (Al2O3 X 15%)) values from 0.015 to 0.144, TOC values from 0.02% to 0.21%, V/Cr values from 0.3 to 2.0, Sr/Ba values from 3.20 to 49.50 in the Late Devonian Frasnian Upper rhenana zone to the top linguiformis zone of the Yangdi sec-tion deposited in carbonate slope facies of Guilin, Guangxi, South china, which indicates that biomass, productivity, organic carbon burial and salinity increase and that oxygenation near the boundary between sediments and waters decreases from the Late Devonian Frasnian Upper rhenana zone to the top linguiformis zone. Abundance of molecular fossils increases and normal alkanes, isoprenoid hydrocarbon, terpanes and steranes are dominated from the Late Devonian Frasnian to the bottom of Famennian, which shows that the predecessors of molecular fossils of the Frasnian-Famennian (F-F) transition are dominated by marine phytoplankton, zooplankton and benthic bacteria with no photosynthesis. Therefore, it is considered that the F-F transitional mass extinction with a multistage, selection and global synchronizing was caused by bacte-rial-algal proliferating, continuing deterioration of the shallow marine ecoenvironment of the mid-dle-lower latitudes. A simple cause and effect chain can be expressed as: appearance of seed plants and multi-storied forests → enhanced chemical and biochemical weathering and pe-dogenesis → wide development of soils → increasing riverine nutrient fluxes in epicontinental sea → from superoligotrophic to eutrophic in epicontinental sea → proliferating of marine phyto-plankton and zooplankton → frequent red tide and anoxia → mass extinction of shallow marine organisms in the middle-lower latitudes. It is worth notice that the factor drawdown of atmos-pheric Pco2, climatic cooling and sea level falling c

关键词： mass extinction, bacteria-algae, carbon isotopes, molecular fossils, biodiversity, Late Devonian, Guangxi, South china.

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

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

Timing,scale and mechanism of the destruction of the North china Craton

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Timing,scale and mechanism of the destruction of the North C...