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Geochronology,Geochemistry and Sr-Nd-Pb Isotopic Study of the Wulong Flower-Like Glomerophyric Diorite Porphyry(Central China):Implications for Tectonic Evolution of Eastern Qinling

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Journal of Earth Science 2018年第5期29卷 1203-1218页

作者： Yuxiang Zhu Lianxun Wang Changqian Ma Chao Zhang Ke Wang School of Earth Sciences China University of GeosciencesWuhan 430074China institut für mineralogie Leibniz Universitat HannoverCallinstr.330167 HannoverGermany

The Wulong diorite porphyry displays a very unusual flower-like glomerophyric texture and is thus well-known as a gemstone type of ＂Luoyang peony stone＂ for non-geologists. Hereby, we present a comprehensive study in terms of petrography, zircon U-Pb geochronology, geochemistry and Sr-Nd-Pb isotope. The rock exposed as small-scale dykes in the field, intruding in the Archean migmatized biotite- plagioclase genesis at the southern margin of the North China Craton. It exhibits typical porphyrite texture with plagioclase and amphibole as dominant and subdominant phenocrysts, respectively. The diorite porphyry rocks contain 51 wt.%-59 wt.% SiO2, belonging to medium-K calc-alkaline rock series. They are characterized by enrichment of large ion lithophile elements （LILEs, e.g., Ba） and depletion of high field-strength elements （HFSEs, e.g., Nb, Ta, Zr and Hf）, resembling island arc magmatic rocks. They show high initial Sr isotopic ratios （0.710 7-0.715 8）, low eNd（t） values （-9.9 to -13.3） and variable initial Pb isotopic ratios （206pb/204Pb vary from 17.3 to 19.3）, similar to the coeval intermediate and mafic magmatic rocks of adjacent region. These geochemical features indicate that the Wulong diorite porphyry is likely to originate from an enriched mantle with contamination of crustal materials. Zircon U-Pb dating results reveal a magma crystallization age of 480-A3 Ma, consistent with the summit of the magmatic events of the Qinling orogenic belt and reflecting the northernmost Paleozoic magmatic activity of the belt. This may indicate the influence of northward subduction of Paleotethyan oceanic slab can extend a distance of ca. 200 km to the north and reach Luoyang-Songshan region in the East Qinling Orogen.

关键词： Early Paleozoic North China Craton geochronology diorite porphyry Wuloug flowerlike glomerophyric texture.

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Determination of surface structure and the depth profile of silica glass by infrared spectroscopy

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光学精密工程 2005年第4期13卷 413-420页

作者： C. Z. Tan Laboratory of Solid State Microstructure and Department of Materials Science and Engineering Nanjing University 210093 Nanjing China Institut für Mineralogie Freie Universitt Berlin 14195 Berlin Germany

The surface structure and properties are different from those of the bulk, depending on the substrate materials and deposition condition, and playing an important role in precise optical components. The conventional spectroscopic methods to monitor the surface structure are restricted only in several layers of molecules. It is known that the penetration depth of the incident light increases with its wavelength and decreases with the angle of incidence. Thus infrared spectroscopy provides a powerful means for determination of surface structure and the depth profile up to micrometers. By recording the reflection spectra at different angles of incidence, the surface structure and its depth profile can be monitored successively. further, the incident field has the subcomponents parallel and perpendicular to the surface, which excite the transverse and longitudinal optic modes, respectively. Change of the polarization direction of the incident light provides a practical function to study anisotropic property of the surface and the interaction between the transverse and longitudinal optic modes. In this work, infrared spectrophotometer was applied to investigate the depth profile in microstructure of silica glass. Combining with the glass fiber system, this technique can be used for in-situ control of the deposition process. In comparing with ellipsometry, this method reveals both structural and constitutional information.

关键词：硅石光谱红外线表面结构光学材料

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Chinese Annals of Mathematics,Series B 2002年第2期23卷 165-180页

作者： A.BENSOUSSAN J.FREHSE UniversityParis Institut fur Angewandte Mathematik Dauphineand CNES(CentreNationald’Etudes Spatiales)2PlaceMauriceQuentin75001Pari

The objective of this paper is to consider the theory of regularity of systems of partial differential equations with Neumann boundary conditions. It complements previous works of the authors for the Dirichlet case. This type of problem is motivated by stochastic differential games. The Neumann case corresponds to stochastic differential equations with reflection on boundary of the domain.

关键词： Regularity theory Neumann boundary conditions Dirichlet problem

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Crystal morphology of sucrose influenced by rotation axes parallel to growth planes

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Chinese Science Bulletin 2000年第16期45卷 1468-1471页

作者： C.Silber H.Follner institut Für mineralogie und Mineralische Rohstoffe der Technischen Universitat Clausthal Adolph-Roemer-Str.2AD-38678 Clausthal-ZellerfeldDeutschlandInstitut Für Mineralogie und Mineralische Rohstoffe der Technischen Universitat ClausthalAdolph-Roemer-Str.2AD-38678 Clausthal-ZellerfeldDeutschland

Three different types of growth forms of sucrose (P21) were found by calculating with the Fourier transform method of crystal morphology. The observed central distances of the (100) and (001) faces are smaller than those calculated. It will be shown that the two-fold screw axis, which runs parallel to these faces, influences the rate of growth. The effectiveness of these symmetry elements is relative to the rotation angle around the face normal.

关键词： sucrose crystal growth mechanism symmetry dependent growth Fourier transform method of morphology.

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Regulation of neural stem/progenitor cell functions by P2X and P2Y receptors

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Neural Regeneration Research 2017年第3期12卷 395-396页

作者： Peter Illes Patrizia Rubini Rudolf-Boehm-institut fur Pharmakologie und Toxikologie Universitat LeipzigLeipzigGermany

Neural stem/progenitor cells：Radial glial cells constitute multipotent cells in the ventricular zone,lining the wall of the lateral ventricle of the embryonic *** have the capacity to give rise to cells belonging to ... 详细信息

关键词： NSCs cell Regulation of neural stem/progenitor cell functions by P2X and P2Y receptors stem

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Modeling of Long-Range Intra- and Inter-Species Charged Particle Collisions for PIC Simulations

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Communications in Computational Physics 2010年第5期7卷 877-903页

作者： D.D’Andrea C.-D.Munz R.Schneider Forschungszentrum Karlsruhe-in der Helmholtz-Gemeinschaft Institut fur Kern-und EnergietechnikPF 3640D-76021 KarlsruheGermany institut fur Aerodynamik und Gasdynamik Universitat StuttgartPfaffenwaldring 21D-70550 StuttgartGermany Forschungszentrum Karlsruhe-in der Helmholtz-Gemeinschaft Institut fur Hochleistungsimpuls und MikrowellentechnikPF 3640D-76021 KarlsruheGermany

In this paper we present the modelling of elastic intra-species electron-electron and inter-species electron-ion scattering in a plasma on the basis of the FokkerPlanck collision *** into account the equivalence of this operator with a stochastic differential equation,we propose a Particle-in-Cell based approach for the numerical solution of the Fokker-Planck collision *** we will see,the introduced numerical concept allows the simulation of the collisional relaxation process in a fully self-consistent fashion.

关键词： Coulomb collisions in plasmas collisional relaxation Fokker-Planck equation stochastic differential equation particle-in-cell method

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Design and redesign journey of a drug for transthyretin amyloidosis

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Neural Regeneration Research 2025年第4期20卷 1096-1097页

作者： Francisca Pinheiro Salvador Ventura institut de Biotecnologia i Biomedicina Departament de Bioquímica i Biologia MolecularUniversitat Autònoma de BarcelonaBellaterraSpain

The misfolding and subsequent aggregation of proteins into amyloid fibrils underlie the onset of a variety of human disorders collectively known as ***(TTR)is one of the>30 amyloidogenic proteins identified to date and is associated with a group of highly debilitating and life-threatening disorders called TTR amyloidosis(ATTR).ATTR comprises senile systemic amyloidosis,which is linked to wild-type(WT)TTR aggregation,and hereditary ATTR,a dominantly inherited disorder caused by the deposition of one of over 130 TTR genetic *** systemic amyloidosis is a prevalent age-related amyloidosis,affecting up to 25%of the population over 80 years of age,and is characterized by the build-up of TTR fibrils in the *** hereditary ATTR,the clinical presentation is highly heterogeneous,primarily affecting the peripheral nervous system(familial amyloid polyneuropathy-FAP)or the heart(familial amyloid cardiomyopathy).In rare cases,aggregation develops in the central nervous system,giving rise to a phenotype known as familial leptomeningeal amyloidosis(Carroll et al.,2022).

关键词： amyloid aggregation senile

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Growth-induced Stacking Faults of ZnO Nanorods Probed by Spatial Resolved Cathodoluminescence

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Chinese Physics Letters 2012年第7期29卷 261-264页

作者： XIE Yong JIE Wan-Qi WANG Tao WIEDENMANN Michael NEUSCHL Benjamin MADEL Manfred WANG Ya-Bin FENEBERG Martin THONKE Klaus State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072 institut fur Quantenmaterie/Gruppe Halbleiterphysik Universitat Ulm89069 UlmGermany institut fur Experimentelle Physik Otto-von-Guericke-Universitat Magdeburg39106 MagdeburgGermany

Low density ZnO nanorods are grown by modified chemical vapor deposition on silicon substrates using gold as a *** use high resolution photoiuminescence spectroscopy to gain the optical properties of these nanorods in large *** as-grown samples show sharp near-band-gap luminescence with a full width at half maximum of bound exciton peaks at about 300μeV,and the ratio of ultraviolet/yellow luminescence larger than *** spatial and spectral resolved scanning electron microscope-cathodoluminescence is performed to excite the ZnO nanorods in single rods or different positions of single rods with the vapour-solid grovth *** bottom of the nanorod has a 3.31-eV luminescence,which indicates that basal plane stacking faults are related to the defects that are created at the first stage of growth due to the misfit between ZnO and Si.

关键词： vapour Spatial ultraviolet

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Identification of greigite in lake sediments and its magnetic significance

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Science China Earth Sciences 2002年第1期45卷 81-87页

作者：胡守云 E.Appel V.Hoffmann W.Schmahl Nanjing institute of Geography & Limnology Chinese Academy of Sciences Nanjing China institut für Geologie und Paläontologie Universität Tübingen Germany institut für mineralogie Ruhr-Universtität Bochum Germany

Detailed rock magnetic investigations and mineralogical analysis were conducted on lacustrine sediments recovered from Zoigê Basin, eastern Tibetan Plateau. Greigite, with fine and homogenous grain size, is found as a main magnetic carrier, which is suspected to be of biochemical origin. In contrast to some reports, greigite within the sediments is not oxidized even after exposure to air for a few years, which could be due to the fact that greigite is sealed by silicate.

关键词： greigite lacustrine sediments rock magnetism X-ray diffraction SEM

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Thermodynamic and rate variational formulation of models for inhomogeneous gradient materials with microstructure and application to phase field modeling

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Acta Mechanica Sinica 2015年第2期31卷 162-172页

作者： Svyatoslav Gladkov Bob Svendsen Material Mechanics RWTH Aachen Aachen Germany Microstructure Physics and Alloy Design Max-Planck-Institut fur Eisenforschung DusseldorfGermany

In this work,thermodynamic models for the energetics and kinetics of inhomogeneous gradient materials with microstructure are formulated in the context of continuum thermodynamics and material *** simplicity,attention is restricted to isothermal *** materials of interest here are characterized by（1） first- and secondorder gradients of the deformation field and（2） a kinematic microstructure field and its gradient（e.g.,in the sense of director,micromorphic or Cosserat microstructure）.Material inhomogeneity takes the form of multiple phases and chemical constituents,modeled here with the help of corresponding phase *** requirements together with the dissipation principle result in the reduced model field and constitutive *** cases of these include the wellknown Cahn-Hilliard and Ginzburg-Landau *** the last part of the work,initial boundary value problems for this class of materials are formulated with the help of rate variational methods.

关键词： Continuum thermodynamics Material inhomogeneity Conservative Non-conservative phase fields

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