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Textures and melt-crystal-gas interactions in granites

Geoscience Frontiers 2015年第5期6卷 635-663页

作者： jean-louis Vigneresse GeoRessources UMR 7339Universite de Lorraine

Felsic intrusions present ubiquitous *** result from the differential interactions between the magma components(crystal,melt,gas phase) while it flows or when the flow is perturbed by a new magma *** most obvious structure consists in fabrics caused by the interactions of rotating grains in a flowing viscous *** magma inputs through dikes affect the buk massif flow,considered as global within each mineral facies.A review of the deformation and flow types developing in a magma chamber identifis the patterns that could be *** determines their controlling parameters and summarizes the tools for their ***,a brief review of the theology of a complex multiphase magma identifies and suggests interactions between the different *** specific responses each component presents lead to instability *** particular,the change in vorticity orientation,associated with the switch between monoclinic to triclinic flow is a cause of many *** are preferentially *** include fabric development,shear zones and flow *** depend of the underlying rheology of interacting ***,enclaves,schlieren and ladder dikes result from the interactions between the magma components and changing boundary ***,pegmatites,unidirectional solidification textures and miarolitic cavities result from the interaction of the melt with a gaseous *** illustrations examine what is relevant to the bulk flow,local structures or boundary *** each case a field observation illustrates the *** discussion reformulates instability observations,suggesting new trails for ther description and interpretation in terms of local departure to a bulk flow.A brief look at larger structures and at their evolution tries to relate these instabilities on a broader *** helical structures of the Ricany pluton,Czech Republic and by the multiple granitic intrusions of Dolbe

关键词： Granitic magma Instabilities Triclinic flow Struct

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Addressing ore formation and exploration

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Geoscience Frontiers 2019年第4期10卷 1613-1622页

作者： jean-louis Vigneresse GéoRessources UMR 7339Université de Lorraine

Common base and noble metals represent an important economic factor in the actual industrial *** instance the world resources for copper are actually estimated for about the next 30 years *** situation requires rethinking the way major ore deposits form,leading to new guides for *** present paper briefly examines the processes leading to ore formation,in relation with granitic or granodioritic *** identifies the importance of metal enrichment during the magmatic *** the magma chamber that forms porphyry intrusions,metals may incorporate to first formed crystals,becoming inert;concentrate into the residual melt of a mush;or segregate by diffusion into the exsolved magmatic volatile phase(MVP)into which they are transported and precipitated.A competition results between elements partitioning and ***,a specific Peclet number for each metal(Cu,Au,Ag,Mo,W,Sn,and REE)controls the ratio between the diffusive and the advective *** diffusivity in the melt shows differential behavior relative to a threshold of about10 13 m2/*** with slower diffusivity values(***)will not ***,fast diffusive metals(Au,Ag,Cu)may rapidly incorporate the MVP,provided an adequate component(halogens or S)is attractive for *** chemistry of the MVP escaping the magma induces different alteration *** relative content in F,Cl or S,attested by the composition of biotites and apatites,links with the preferential content of metals in o re deposits,representing a valuable tool for *** the model is replaced in a set of coupled mechanical-chemical instabilities,within a three phase material.

关键词： Porphyry ore deposits Metals concentration processes Exploration Alteration pattern

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Phase coexistence properties of liquid mercury:a simulation study

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Rare Metals 2006年第5期25卷 567-571页

作者： jean-louis Bretonnet jean-Marc Bomont Laboratoire de Physique des Milieux Denses Université Paul Verlaine1bd F.D.Arago57078 MetzCedex 3France

The thermophysical properties of expanded liquid mercury have been investigated along the liquid-vapor coexistence curve by using Monte Carlo and Molecular Dynamic simulations. For the purpose, an empirical state dependent interatomic potential for the region of dense metallic liquid is used, while the state dependence is not necessary near the cliffcal point. In order to test the validity of this potential, we determine the surface layering and the sound velocity, two properties very sensitive to the choice of the potential. Our results are in quite good agreement with other theoretical results and to the experimental data available in the literature.

关键词： mercury simulation phase coexistence liquid state

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碳-环氧片材增强铝试件的疲劳响应

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钢结构(中英文) 2008年第10期 82-82页

作者： Marie-Laetitia Pastor Xavier Balandraud Michel Grédiac jean-louis robert

对各种类型的铝试件进行疲劳试验以研究组合片材对破损和未破损铝试件的增强效果,探讨加工过程和试件尺寸对疲劳性能的影响。对破损和未破损试件进行修补,比较了其疲劳强度与普通铝S-N曲线上相对应的值。研究显示:黏合剂的抗剪强度对试... 详细信息

对各种类型的铝试件进行疲劳试验以研究组合片材对破损和未破损铝试件的增强效果,探讨加工过程和试件尺寸对疲劳性能的影响。对破损和未破损试件进行修补,比较了其疲劳强度与普通铝S-N曲线上相对应的值。研究显示:黏合剂的抗剪强度对试件的疲劳性能影响很大,尤其在最高荷载水平时。通过准静态试验和相应的数学模型可以获得黏合剂抗剪强度。当黏合剂最大剪应力与抗剪强度近似相等时,可观察到疲劳荷载下试件的早期破坏,很显然后者对修复结构疲劳响应有很大的影响。

关键词：铝复合片材疲劳寿命增强横向剪应力

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Homogenization of Hyperbolic Damped Stochastic Wave Equations

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Acta Mathematica Sinica,English Series 2018年第2期34卷 233-254页

作者： Aurelien FOUETIO jean louis WOUKENG Department of Mathematics and Computer Science University of Dschang P.O. Box 67 Dschang Cameroon Interdisciplinary Center for Scientific Computing ( IWR) University of Heidelberg Im Neuenheimer Feld 205 69120 Heidelberg Germany

For a family of linear hyperbolic damped stochastic wave equations with rapidly oscillating coefficients, we establish the homogenization result by using the sigma-convergence method. This is achieved under an abstrac... 详细信息

关键词： Algebras with mean value stochastic hyperbolic partial differential equations Wiener process sigma-convergence

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MULTISCALE HOMOGENIZATION OF NONLINEAR HYPERBOLIC EQUATIONS WITH SEVERAL TIME SCALES

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Acta Mathematica Scientia 2011年第3期31卷 843-856页

作者： jean louis Woukeng David Dongo Department of Mathematics and Computer Science Faculty of Science University of Dschang

We study the multiscale homogenization of a nonlinear hyperbolic equation in a periodic *** obtain an accurate homogenization *** also show that as the nonlinear term depends on the microscopic time variable,the global homogenized problem thus obtained is a system consisting of two hyperbolic *** is also shown that in spite of the presence of several time scales,the global homogenized problem is not a reiterated one.

关键词： hyperbolic multiscale nonlinear

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云母的命名

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矿物岩石地球化学通报 1999年第3期18卷 3-12页

作者： Milan Rieder,Giancarlo Cavazzini,Yurii S.D’yakonov, Viktor A.Frank Kamenetskii,Glauco Gottardi,Stephen Guggenheim,Pavel V.Koval′, Georg Muller,Ana M.R.Neiva,Edward W.Radoslovich,jean louis robert, Francesco P.Sassi,Hiroshi Takeda,Zdenek Weiss,Davi Department of Geochemistry Mineralogy and Mineral Resources Charles University A lbertov 6 12843 Praha 2 Gzech Republic.

定义云母为层状硅酸盐。其结构单元由两个相向排列的四面体片（Ｔｓ）和夹于其间的一个八面体片（Ｏｓ）组成。这些片构成一个单元层，层与层之间被非水化层间阳离子（Ｉ）分开，其顺序是：非水化阳离子层、四面体片、八面体片、四面体... 详细信息

定义云母为层状硅酸盐。其结构单元由两个相向排列的四面体片（Ｔｓ）和夹于其间的一个八面体片（Ｏｓ）组成。这些片构成一个单元层，层与层之间被非水化层间阳离子（Ｉ）分开，其顺序是：非水化阳离子层、四面体片、八面体片、四面体片、非水化阳离子层、四面体片、八面...

关键词：分类命名云母

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Multiscale Analysis of Semilinear Damped Stochastic Wave Equations

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Acta Mathematica Sinica,English Series 2023年第7期39卷 1305-1331页

作者： Aurelien FOUETIO Gabriel NGUETSENG jean louis WOUKENG Department of Mathematics Higher Teacher Training CollegeUniversity of NgaoundereP.O.Box 652BertouaCameroon Department of Mathematics University of Yaounde IP.O.Box 812YaoundeCameroon Department of Mathematics and Computer Science University of DschangP.O.Box 67DschangCameroon

In this paper we proceed with the multiscale analysis of semilinear damped stochastic wave motions. The analysis is made by combining the well-known sigma convergence method with its stochastic counterpart, associated to some compactness results such as the Prokhorov and Skorokhod theorems. We derive the equivalent model, which is of the same type as the micro-model. One of the novelties of the work is that the corrector problem is solved in the classical sense of distributions,thereby allowing numerical computations of the homogenized coefficients.

关键词： Hyperbolic stochastic equations Wiener Process sigma convergence tightness of probability measures

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The Séchilienne (France) Landslide:a Non-typical Progressive Failure Implying Major Risks

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Journal of Mountain Science 2011年第2期8卷 117-123页

作者： jean-louis DURVILLE Christophe BONNARD Pierre POTHERAT Conseil général de l'environnement et du développement durable Paris France Independent expert PBBG SA Lausanne Switzerland Centred'études techniques de l'équipement Lyon France

The National Road RN 91 has been threatened for about twenty-five years by a huge landslide, located 25 km south-east to the town of Grenoble (France). If several million cubic meters of rock fall down, the debris will dam the valley. Then the failure of the dam by overtopping and rapid erosion might result in a catastrophic flood and dramatic consequences for human life, environment and economy throughout the valley. The paper presents the hazard assessment based on geological and hydrological surveys, including small scale hydraulic tests, as well as the risk evaluation that has been performed. The risk management relies first upon a high level monitoring and an emergency plan; various mitigation strategies have been considered.

关键词： Landslide Progressive failure Séchilienne France

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H2/CO/air premixed and partially premixed flame structure at different pressures based on reaction limit analysis

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Science Bulletin 2018年第19期63卷 1260-1266页

作者： Zaigang Liu Wenjun Kong jean-louis Consalvi Wenhu Han Key Laboratory of Light-Duty Gas-Turbine Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of Engineering Sciences. University of Chinese Academy of Sciences Beijing 100049 China IUSTI UMR 7343 Aix-Marseille Universite CNRS Marseille 13453 France

Premixed and partially premixed flames (PPFs) of H2/CO/air syngas are studied numerically to investigate the effect of pressure on syngas PPF structure. Chemical characteristics of the syngas flame at different pressures are investigated based on reaction limit analysis using a one-dimensional configuration. The results show that CO affects the syngas reaction limits through both physical effects that consist mainly in dilution and chemical effects that are related to both R23 (CO+OH=CO2+H) and HCO pathway. In particular, the HCO pathway weakens the flame at low pressures due to the chain-terminating effect of R25 (HCO+O2=CO+HO2) and R26 (HCO+H=CO+H2), and enhances the flame at high pressures because of the contribution of R25 to the HO2chain-branching process. These CO chemical characteristics are also observed in the premixed zone of 50%H2+50%CO syngas PPFs whereas only R23 is important in the non-premixed zone.

关键词： Syngas Partially premixed flame Pressure effect Reaction limit Flame structure

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