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Genesis of excess argon in phengite and significance of ^(4.)Ar-^(39)Ar age spectra for omphacite:A case study on UHP eclogite of South Dabie Terrain,china

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Chinese Science Bulletin 2000年第15期45卷 1345-1351页

作者： wang Songshan, GE Ningjie, SANG Haiqing & QIU ji1. Institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, china 2. department of earth and space Science, university of Science and technology of china, Hefei 230026, china Correspondence should be addressed to wang Songshan Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China department of earth and space Science University of Science and Technology of China Hefei China

The Ar-Ar dating of phengite and omphacite in ultrahigh-pressure (UHP) eclogite of Bixiling and Hengchong in the South Dabie Terrain shows that the content range of excess argon is as high as (0.4.1.3)×10 8 mol· g 1. The genesis of the excess argon is discussed. The Ar-Ar age spectra of omphacite could not support the opinion that the UHP metamorphism occurred in Caledon epoch and pre-Caledon epoch.

关键词： South Dabie Terrain ultrahigh-pressure metamorphics phengite omphacite excess argon.

CONSTRUCTION OF EQUILIBRIUM P-T BUNDLES OF COMBINATION OF n+2 PHASES ON PETROGENETIC GRIDS

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Science china Chemistry 1989年第2期32卷 193-204页

作者：程伟基王基镕郭其悌 department of earth and space sciences the University of Science and Technology of China Hefei department of Mathematics the University of Science and Technology of China Hefei Institute of Geochemistry Academia Sinica Guiyang

This paper first discusses the algorithm for balancing reactions of the combination of n + 2 phases around an invariant point on a P-Tdiagram, and then emphatically develops a new algorithm for the arrangement of univariant reaction lines, using a signum matrix V·F or S·F, where V and S are diagonal matrixes of signum of △V and △S in n+2 univariant reactions respectively, and F is a signum matrix of stoichiometric coefficients of phases in reactions. Using this new algorithm greatly simplifies relative computer programs, brings out the automatic construction of equilibrium P-T curves of combination of n +2 phases, and further makes it possible to construct a whole petrogenetic grid automatically

关键词： P-T bandles of combination of n + 2 phases.

马鞍山地区不同类型绿松石稀土元素地球化学研究

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稀土 1997年第4期18卷 1-3,29页

作者：杨晓勇王奎仁刘向华中国科学技术大学地球和空间科学系

本文针对皖南马鞍山地区产出的三种主要类型的绿松石即结核状、脉状和假象绿松石进行了矿物化学、稀土元素地球化学研究，结合绿松石产出的地质背景，讨论了不同类型的绿松石矿石稀土元素富化和亏损的原因。

关键词：绿松石矿物化学稀土元素马鞍山

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安徽亳县陨石不透明矿物研究

矿物学报 1987年第2期 107-112页

作者：王奎仁中国科学技术大学地球和空间科学系合肥

毫县陨石的不透明矿物有陨硫铁、铁纹石、镍纹石、镍黄铁矿、镁铁尖晶石、自然铜、石墨、方铁矿、铬铁矿、钛铁矿、磁铁矿、张衡矿及x矿物等。本文对它们进行了反光显微镜鉴定、X射线分析、反射率测定和电子探针分析。总结了不同化学群... 详细信息

毫县陨石的不透明矿物有陨硫铁、铁纹石、镍纹石、镍黄铁矿、镁铁尖晶石、自然铜、石墨、方铁矿、铬铁矿、钛铁矿、磁铁矿、张衡矿及x矿物等。本文对它们进行了反光显微镜鉴定、X射线分析、反射率测定和电子探针分析。总结了不同化学群的球粒陨石中FeO和MgO的含量变化规律。

关键词：陨石不透明矿物安徽

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安徽亳县陨石透明矿物研究

矿物学报 1987年第3期 238-244页

作者：王奎仁王俊新中国科学技术大学地球和空间科学系中国科学技术大学地球和空间科学系合肥

本文对毫县陨石透明矿物中橄榄石、辉石、长石、石英、白云石、方解石和黑云母等作了研究。以此为据讨论了毫县陨石的化学群、岩石类型、热变质作用和冲击变质作用等等。

关键词：陨石透明矿物安徽

Characteristics of Compositional Migration in Mylonites from the Ductile Shear Zones of the Southern Tancheng-Lujiang Fault Belt, Eastern Anhui Province

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Acta Geologica Sinica(English Edition) 1998年第1期72卷 37-50页

作者： YANG Xiaoyong LUI Deliang YANG Xueming wang kuiren DAI jinxing department of earth and space sciences Advanced Centre for Earth Sciences and AstronomyUniversity of Science and Technology of Chinathe Third World Academy of SciencesHefeiAnhui 230026 Research Institute of Petroleum Exploration and Development China National Petroleum CorporationBeijing 100083

On the basis of field geology, three typical ductile shear zones in the southern part of the Tancheng-Lujiang fault belt have been chosen for a detailed study. Altogether ten samples of the tectonites have been collected for this study. The paper is focused on a comprehensive study of the tectonites in the medium-lower horizons of the ductile shear zones. The mineral compositions of the rocks are analyzed with EPMA and some typical whole-rock samples analyzed by chemical and ICP methods. Based on the comprehensive study of the characteristics of the deformation, the mineral assemblages and the changes of chemical composition of the bulk rocks, this paper presents a discussion on the relationship between the volume loss, the fluid flow and compositional changes during mylonitization of the ductile shear zones in this region. Our study shows that there are a large amount of fluids flowing through the shear zones during the process of mylonization, accompanied by the loss of rock volume and migration of elements and components. Modelling calculation results under different saturation conditions of fluids show that the maximum volume loss of the tectonites is about 60% relative to their protolith, while the fluid/rock ratio ranges from 10 to 103 in different ductile shear zones.

关键词： mylonite ductile shear zones volume loss fluid-rock interaction compositional migration Tancheng-Lujiang fault belt

Rutile U-Pb age for the ultra-high pressure eclogite from the Dabie Mountains, central china: Evidence for rapid cooling

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Chinese Science Bulletin 2002年第1期47卷 62-65页

作者： LI Qiuli LI Shuguang ZHOU hongying LI Huimin hong ji’an wang Qingchen H.J.Massonne department of earth and space Science University of Science and Technology of ChinaHefei 230026China Tianjin Institute of Geology and Mineral Resources Institule of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China Institut fur Mineraloie&Kristallechemie Universitat StuttgartAzenbergster.1870174 StuttgartGermany

The U-Pb isotope compositions of rutile, om-phacite and garnet in the eclogite from the jinheqiao area in the Southern Dabie ultrahigh-pressure metamorphic zonewere analyzed. The consistent high precision U-Pb age (218± 1.2) Ma of rutile in eclogite from the Dabie Mountains was obtained by two ways of isochron and common Pb correction based on the composition of omphacite. This proves that the omphacite in eclogite has a U/Pb ratio (μ = 2.8) low enough to be used for common Pb correction in the analyses of rutile. Under the rapid cooling condition (4.℃/Ma) the closure temperature for U-Pb diffusion in rutile is about 4.0℃. Thus, this U-Pb age of rutile proves that 218 Ma should be the cooling age of eclogite at 4.0℃ instead of the peak meta-morphic age.

关键词： U-Pb dating of rutile eclogite Dabie Mountains.

Searching for exoplanets with HEPS:*** probability of earth-like planets in multiple systems

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Research in Astronomy and Astrophysics 2019年第1期19卷 35-46页

作者： Zhou-Yi Yu Hui-Gen Liu ji-Lin Zhou Dong-hong Wu Ming Yang Songhu wang Hui Zhang Zi Zhu jia-Cheng Liu School of Astronomy and space Science Key Laboratory of Modern Astronomy and Astrophysics in Ministry of EducationNanjing University department of Astronomy Yale University

The astrometry method has great advantages in searching for exoplanets in the habitable zone around solar-like stars. However, the presence of multiple planets may cause a problem with degeneracy when trying to compute accurate planet parameters from observation data and reduce detectability. The degeneracy problem is extremely critical, especially in a space mission which has limited observation time and cadence. In this series of papers, we study the detectability of habitable earth-mass planets in different types of multi-planet systems, aiming to find the most favorable targets for the potential space mission–Habitable ExoPlanet Survey(HEPS). In the first paper, we present an algorithm to find planets in the habitable zone around solar-like stars using astrometry. We find the detectability can be well described by planets' signal-to-noise ratio(SNR) and a defined parameter S = M2/(T1-T2)2, where M2 and T2are the mass and period of the second planet, respectively. T1 is the period of the planet in the habitable zone. The parameter S represents the influence of planetary architectures. We fit the detectability as a function of both the SNR of the planet in the habitable zone and the parameter S. An earth-like planet in a habitable zone is harder to detect(with detectability PHP< 80%) in a system with a hot Jupiter or warm Jupiter(within2 AU), in which the parameter S is large. These results can be used in target selections and to determine the priority of target stars for HEPS, especially when we select and rank nearby planet hosts with a single planet.

关键词： astrometry stars:planetary systems planets and satellites:detection methods:numerical

Long radial coherence of electron temperature fluctuations in non-local transport in HL-2A plasmas

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Chinese Physics B 2024年第2期33卷 413-420页

作者：石中兵方凯锐李景春邹晓岚卢兆旸闻杰王占辉丁玄同陈伟杨曾辰蒋敏季小全佟瑞海李永高施陪万钟武律许敏 Southwestern Institute of Physics Chengdu 610041China department of earth and space sciences Southern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Nuclear and Radiation Safety College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China CEA IRFMSaint-Paul-lez-Durance 13108France

The dynamics of long-wavelength(kθ<1.4.cm^(-1)),broadband(20 kHz–200 kHz)electron temperature fluctuations(Te/Te)of plasmas in gas-puff experiments are observed for the first time in HL-2A *** a relatively low densi... 详细信息

The dynamics of long-wavelength(kθ4.cm^(-1)),broadband(20 kHz–200 kHz)electron temperature fluctuations(Te/Te)of plasmas in gas-puff experiments are observed for the first time in HL-2A *** a relatively low density(ne(0)■0.91×10^(19)m^(-3)–1.20×10^(19)m^(-3))scenario,after gas-puffing the core temperature increases and the edge temperature *** the contrary,temperature fluctuation drops at the core and increases at the *** show the non-local emergence is accompanied with a long radial coherent length of turbulent *** in a higher density(ne(0)?1.83×10^(19)m^(-3)–2.02×10^(19)m^(-3))scenario,the phenomena are not ***,compelling evidence indicates that E×B shear serves as a substantial contributor to this extensive radial *** finding offers a direct explanatory link to the intriguing core-heating phenomenon witnessed within the realm of non-local transport.

关键词： nuclear fusion non-local transport tokamak gas-puffing