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The Thermal History of the Huangmeijian Granite Intrusion in Anhui and Its Relation to Mineralization: Isotopic Evidence

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Acta Geologica Sinica(English Edition) 1996年第2期70卷 168-180页

作者： Zheng Yongfei Fu bin and Gong bing department of earth and {4. sciences, University of science and technology of china, hefei 2.002. liu Xinzhu department of earth and space sciences University of Science and Technology of China Hefei 230026

Whole-rock Rb-Sr, zircon U-Pb and hornblende, biotite and K-feldspar K-Ar ages areused to reconstruct the cooling history of the Huangmeijian intrusion in the Anqing-Lujiangquartz-syenite belt in Anhui. Oxygen isotope geothermometry of mineral pairs demonstrates thatdiffusion is a dominant factor controlling the closure of isotopic systems. Assuming the coolingof the intrusion is synchronous with a dicrease in local geothermal gradients, an emplacementdepth of about 8 km and the magma crystallization temperature of 800±50℃ are estimated. TheHuangmeijian intrusion experienced a rapid cooling process and uplifted after its emplacementand crystallization at 133 Ma B.P. with a cooling rate of 34.5℃/Ma and an uplifting rate of 0.35mm/a. The intrusion was rising until it rested at a depth of 3km at a temperature of 300±50℃about 14.Ma later. Then the intrusion was in slow cooling and uplifting with a cooling rate of4.4./Ma and an uplifting rate of 0.04.mm/a. U-Pb dating of pitchblende is done for the hydrothermal uranium deposit formed in thecontact zone of the Huangmeijian intrusion. The result shows that the mineralization age is closeto the closing time of the K-Ar system in biotite. The fluid inclusion thermometry indicates thatthe mineralization temperature is in agreement with the closure temperature of the biotite K-Arsystem. This suggests a close relationship between the slow cooling of the intrusion and thehydrothermal uranium mineralization process.

关键词： quartz syenite isotopic age oxygen isotope cooling history mineralization rate control

lithium Isotope Analytical Methods and Implications for Rare-Metal Mineralization in Granite-Pegmatite Systems: An Overview

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Journal of earth science 2024年

作者： Xiang-Ying Ye bin li Dong-Bo Tan Ke-Cheng liu Zhi-Yong Zhu Hafiz Muhammad Siddique Yi-lin Xiao Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Ministry of Education)， School of Geosciences and Info-physics， Central South University CAS Key Laboratory of Geospace Environment and department of Plasma Physics and Fusion Engineering， University of science and technology of{4. Institute of Geology， Chinese Academy of Geological sciences CAS Key Laboratory of Crust-Mantle Materials and Environments， School of earth and space sciences， University of science and {4. of china Chinese Academy of sciences Center of Excellence in Comparative Planetology

The origin of highly-fractionated granite-pegmatite systems and their associated rare metal mineralization has been widely studied， but there is still ongoing debate. Prevailing hypotheses suggest that pegmatite formation and the associated rare metal mineralization are closely related to aqueous fluid processes. lithium (li) isotope analysis has been widely applied to trace granite-pegmatite evolution. This is because lithium is widely present in various minerals (e.g.， mica， tourmaline) that record the melt and fluid compositions， and lithium isotopes are sensitive to magmatic-hydrothermal processes. We briefly review the methodology of li isotope analyses， the mechanisms of li isotopic fractionation， and， in particular， li isotope fractionation in granite-pegmatite system based on li isotope data we have collected and the latest developments in li isotope geochemistry. With the development of analytical {14.， high-precision measurement of the li content and isotopic compositions have facilitated a series of scientific breakthroughs in understanding the magmatic-hydrothermal evolution of rare-element ore deposits. li isotope analysis on bulk mineral separates show ability to trace various hydrothermal processes (e.g. exotic or exsolved fluids). In situ li isotope analysis methods has been enhanced by the development of new， homogeneous mineral reference materials. In situ SIMS and LA-MC-ICP-MS li isotope measurements on minerals (e.g.， tourmaline) will likely become more important in studying the fluid–rock interactions in magmatic， metamorphic， and hydrothermal processes， as well as on pegmatite petrogenesis and rare-metal mineralization.

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U-PB ZIRCON AGES OF TIANZHUSHAN GRANITES IN THE EASTERN DABIE OROGEN AND THEIR GEOLOGICAL IMPliCATIONS

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Scientia Geologica Sinica 1998年第4期 521-525页

作者： Ge Ningjie(department of earth and space sciences, University of science and technology of china, hefei, 2.002.)Wu Weiping (Anhui institute of Geological science)liu bin (department of earth and space sciences, University of science and technology of Chin

The precise U-Ph zircon dating of Tianzhushan granites indicates. the emplacement age of the intrusion is127 Ma. It is one part of the Large-scale magmatic emplacement in the extension environment after thecollision betWeen Yangtze Block (YB) and North china Block (NCB), and is belonged to the granitesformed after collision orogens. This large-scale tectonic magma event not only caused the emplacement ofgranitic intrusion and led to intense metamorphism and deformation of the rocks in Dabie area, but alsoplayed a very important role for the Dabie ultrahigh pressure (UHP) metamorphic rocks ultimatelyreturning to the each surface.

关键词： Pb U-PB ZIRCON AGES OF TIANZHUSHAN GRANITES IN THE EASTERN DABIE OROGEN AND THEIR GEOLOGICAL IMPliCATIONS wang

Pn Tomographic Velocity and Anisotropy beneath Western china and the Surrounding Region

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Pn Tomographic Velocity and Anisotropy beneath Western China...

First results of the low energy ion spectrometer onboard a Chinese geosynchronous satellite

中国地球物理学会第二十七届年会

作者： L(u|¨)Yan~(1,3*) Ni Sidao~(2,1) liu bin~1 sun Youshun~3 1.School of earth and {4. sciences,University of science and technology of china,hefei,2.002.,china 2.Key Laboratory of Dynamical Geodesy,Institute of Geodesy and Geophysics,Wuhan,4.0077,china 3.department of earth,Atmospheric and Planetary sciences,Massachusetts Institute of technology, Cambridge,Massachusetts 02139,USA

＜正＞Western china and the adjacent region include china’s Tarim Basin,the Tibetan Plateau,the Sichuan-Yunnan region,and Afghanistan,India,Myanmar,and other neighboring *** tectonics of the area is currently controlled by the collision and continuing convergence of the Indian Plate and the Eurasian *** northward movement of the Indian Plate has been widely accepted as the driving force for growth of the Tibetan plateau;however,the mechanism of subduction is still unclear and requires further *** the uppermost mantle, changes in composition,temperature,pressure and water volatile content contribute to Pn velocity ***

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来源： cnki会议评论

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science china(Technological sciences) 2023年第5期66卷 1378-1384页

作者： SHAN Xu MIAO bin CAO Zhe sun ZhenYu li YiRen liu Kai GUO XingYu QU SanBiao SU ZhenPeng SHEN ChengLong PAN ZongHao li Xin HAO XinJun YANG XiaoPing TIAN Chao JIANG Yu liu Shubin AN Qi CHEN XiangJun wang YuMing hefei National Research Center for Physical sciences at the Microscale Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei230026China CAS Key Laboratory of Geospace Environment School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei230026China State Key Laboratory of Particle Detection and Electronics(IHEP-USTC) Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei230026China Shandong Institute of space Electronic technology Yantai264003China State Key Laboratory of Astronautic Dynamics Xi’an Satellite Control CenterXi’an710043China CAS Center for Excellence in Comparative Planetology University of Science and Technology of ChinaHefei230026China

A Chinese geosynchronous satellite was launched on June 23,*** carried a plasma detection package to monitor the space environment around the *** we report the inflight performance of a low energy ion spectrometer(LEIS),one of the primary instruments in the plasma detection package,and its initial observations in *** from the state-of-the-art design of a top-hat electrostatic analyzer cooperated with angular scanning deflectors,three-dimensional measurement of ions in space with a large field of view of 360°×90°and a wide energy range from 50 eV to 25 keV per charge has been *** differential energy flux spectra of ions around the orbit have shown clear signatures of surface charging and storm/substorm ion *** occurrence of surface charging could be caused by the lack of photoemission at the {4.'s eclipse(near the midnight)or the storm energetic electron injection at the dawn *** present results demonstrated a good performance of the LEIS payload in flight for monitoring the space ion environment around the *** situ measurements of the LEIS payload provide us an opportunity to understand the magnetospheric ion dynamics and forecast the associate space weather impacts.

关键词： low energy ion spectrometer geosynchronous orbit inflight measurement differential energy flux surface charging storm/substorm

A fundamental theorem for eco-environmental surface modelling and its applications

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science china earth sciences 2020年第8期63卷 1092-1112页

作者： Tianxiang YUE Na ZHAO Yu liu Yifu wang bin ZHANG Zhengping DU Zemeng FAN Wenjiao shi Chuanfa CHEN Mingwei ZHAO Dunjiang SONG shihai wang Yinjun SONG Changqing YAN Qiquan li Xiaofang sun lili ZHANG Yongzhong TIAN Wei wang Ying’an wang Shengnan MA Hongsheng HUANG Yimin LU Qing wang Chenliang wang Yuzhu wang Ming LU Wei ZHOU Yi liu Xiaozhe YIN Zong wang Zhengyi BAO Miaomiao ZHAO Yapeng ZHAO Yimeng JIAO Ufra NASEER bin FAN Saibo li Yang YANG John PWILSON State Key L aboratory of Resources and Environment Information System Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China College of Geomatics Shandong University of Science and TechnologyQingdao 266590China College of Forestry Beijing Forestry UniversityBeijing 100083China School of Land and Resources China West Normal UniversityNanchong 637002China College of Geographical Information and Tourism Chuzhou UniversityChuzhou 239000China Institutes of science and Development Chinese Academy of SciencesBeijing 100190China department of Information Engineering Shandong University of Science and TechnologyTai'an 271019China College of Resources Sichuan Agricultural UniversityChengdu 611130China College of Geography and Tourism Qufu Normal UniversityRizhao 276828China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100101China School of Geographical science Southwest UniversityChongqing 400715China National Disaster Reduction Center of china Ministry of Emergency ManagementBeijing 100721China department for Population Data China Population and Development Research CenterBeijing 100081China department for Industrial Standard China Standardization AdministrationBeijing 100088China The Academy of Digital china Fuzhou UniversityFuzhou 350002China National Institute of Environmental Health Chinese Center for Disease Control and PreventionBeijing 100021China School of Information Engineering China University of GeoscienceBeijing 100083China Qian Xuesen Laboratory of space technology Beijing 100094China College of Architecture and Urban Planning Chongqing Jiaotong UniversityChongqing 400074China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing

We propose a fundamental theorem for eco-environmental surface modelling(FTEEM) in order to apply it into the fields of ecology and environmental science more easily after the fundamental theorem for earth’s surface system modeling(FTESM). The Beijing-Tianjin-Hebei(BTH) region is taken as a case area to conduct empirical studies of algorithms for spatial upscaling, spatial downscaling, spatial interpolation, data fusion and model-data assimilation, which are based on high accuracy surface modelling(HASM), corresponding with corollaries of FTEEM. The case studies demonstrate how eco-environmental surface modelling is substantially improved when both extrinsic and intrinsic information are used along with an appropriate method of HASM. Compared with classic algorithms, the HASM-based algorithm for spatial upscaling reduced the root-meansquare error of the BTH elevation surface by 9 m. The HASM-based algorithm for spatial downscaling reduced the relative error of future scenarios of annual mean temperature by 16%. The HASM-based algorithm for spatial interpolation reduced the relative error of change trend of annual mean precipitation by 0.2%. The HASM-based algorithm for data fusion reduced the relative error of change trend of annual mean temperature by 70%. The HASM-based algorithm for model-data assimilation reduced the relative error of carbon stocks by 4.%. We propose five theoretical challenges and three application problems of HASM that need to be addressed to improve FTEEM.

关键词： HASM FTEEM Spatial upscaling Spatial downscaling Spatial interpolation Data fusion Model-data assimilation Model coupling

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孔隙流体饱和砂岩的衰减与频率的相关性

石油地球物理勘探 1998年第1期33卷 66-70,77页

作者：席道瑛刘斌谢端刘卫易良坤张斌中国科学技术大学地球和空间科学系

为了研究砂岩的应力弛豫衰减随温度和频率的变化规律，笔者在0．1～10HZ的频率范围内进行了饱和砂岩强迫共振试验。实验结果证明：降低温度与增加频率是等效的；砂岩振动的衰减峰随饱和流体的黏滞系数的增加向高温方向移动；黏滞系数和... 详细信息

为了研究砂岩的应力弛豫衰减随温度和频率的变化规律，笔者在0．1～10HZ的频率范围内进行了饱和砂岩强迫共振试验。实验结果证明：降低温度与增加频率是等效的；砂岩振动的衰减峰随饱和流体的黏滞系数的增加向高温方向移动；黏滞系数和频率对砂岩振动的衰减的影响起相同的作用；随着孔隙率的增大，砂岩振动的衰减也增大。

关键词：孔隙率流体饱和砂岩衰减频率频散油气勘探

Zircon U-Pb age of the Shacun gabbro body, Yuexi, Dabie orogen and its geological implications

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Chinese science Bulletin 2000年第1期45卷 74-79页

作者： GE Ningjie HOU Zhenhui li Huimin CHEN Jiangfeng liu bin RUAN Jun QIN liping department of earth and space sciences University of Science and Technology of ChinaHefei 230026China Tianjing Institute of Geology and Mineral Resources CAGSTianjin 300170China Economic Plan Committee of Anhui Province Hefei 230001China

The single grain zircon U-Pb age of the Shacun mafic-ultramafic intrusion, Yuexi, North Dabie is (128.1 ±2.0) *** date indicates that the intrusion was implaced at Yanshanian when most Mesozoic granitoids were intruded. It was not the syn-collisional intrusion related to the subduction of the Yangtze Block and ultrahigh-pressure metamorphism at Indosinian.

关键词： gabbro single grain zircon U-Pb chronology Dabie Mountains.

A statistical study of the likelihood of a super geomagnetic storm occurring in a mild solar cycle

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earth and Planetary Physics 2018年第2期2卷 112-119页

作者： bin Zhuang YuMing wang ChengLong Shen Rui liu CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical Observatory School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical science and technology Hefei 230026China

The activities of geomagnetic storms are generally controlled by solar activities. The current solar cycle(SC) 24.is found to be mild; compared to SCs 19–23, the storm occurrence and size derived by averaging the occurrence number and D_(st) around the solar maximum are reduced by about 50–82% and 36–61%, respectively. We estimate separately, for SC 19 to 24. the repeat intervals between geomagnetic storms of specific D_(st), based on fits of power-law and log-normal distributions to the storm data for each SC. Repeat intervals between super geomagnetic storms with D_(st)≤–250 nT are found to be 0.36–2.95 year(s) for SCs 19–23, but about 20 years based on the data for SC 24. We also estimate the repeat intervals between coronal mass ejections(CMEs) of specific speed(V_(CME)) since CMEs are known to be the main drivers of intense storms and the related statistics may provide information about the potential occurrence of super geomagnetic storms from the location of the sun. Our analysis finds that a CME with V_(CME)≥1860 km/s may occur once per 3 and 5 months in SC 23 and 24. respectively. Based on a V_(CME)-D_(st) relationship, such a fast CME may cause a storm with D_(st)=–250 nT if arriving at the earth. By comparing the observed geomagnetic storms to storms expected to be caused by CMEs, we derive the probability of CME caused storms, which is dependent on V_(CME). For a CME faster than 1860 km/s, the probability of a CME caused storm with D_(st)≤–250 nT is about 1/5 for SC 23 or 1/25 for SC 24. All of the above results suggest that the likelihood of the occurrence of super geomagnetic storms is significantly reduced in a mild SC.

关键词： solar cycle super geomagnetic storm repeat interval