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Geochronology,Geochemistry,Fluid Inclusion and C,O Isotope Compositions of Calcite Veins in the Paleogene of the Jiangling Basin,South China:Implications for Fluid Evolution and Brine Potash Mineralization

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Acta Geologica Sinica(English Edition) 2023年第2期97卷 513-525页

作者： YU Xiaocan WANG Chunlian LIU Chenglin WANG Jiuyi shen lijian MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China School of Earth Resources China University of GeosciencesWuhan 430074China

Deep-seated potassium-rich brines were identified in the Jiangling Basin,South *** magmatichydrothermal sources have been proposed,the relationship between brine-type potash mineralization and volcanism remains *** this study,U-Pb geochronology,geochemistry,fluid inclusion and C-O isotopic compositions of hydrothermal vein minerals in the Jiangling Basin are *** ablation U-Pb dating of calcite veins indicates that the ages are slightly younger than the formation age of the Balingshan *** inclusions in hydrothermal minerals show medium–low homogenization temperatures(160–220℃)and low salinities(0.14 to 4.9 wt%NaCl eqv.)and densities(0.882–0.944 g/cm^(3)).The liquid compositions of fluid inclusions in calcite veins from sedimentary strata have higher contents of potassium,compared with those from *** coupled negativeδ^(13)CPDB(-10.3‰to-8.0‰)and positiveδ^(18)OSMOW(17.4‰to 20.7‰)values imply that calcite precipitation resulted from CO_(2)degassing of the basaltic magmatic fluids,as indicated by the gas composition of these inclusions in hydrothermal *** earth element patterns indicate that water-rock interaction between hydrothermal fluids and sedimentary wall rocks contributed to the calcite precipitation in sedimentary *** is proposed that high-temperature water-rock interaction between magmatic fluids and sedimentary strata resulted in the potassium enrichment in fluids,interpreted as one of the sources of potassium-rich brines in the Jiangling Basin.

关键词： rare earth element patterns calcite U-Pb geochronology C-O isotopes hydrothermal fluids water-rock interactions

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A Cretaceous Desert-Playa Sedimentary System Controlled the Potash Formation in the Simao Basin

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 1143-1144页

作者： WU Chihua LIU Chenglin shen lijian WANG Jiuyi ZHANG Hua School of Marine Sciences Sun Yat-sen University Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological Sciences

Objective The Simao Basin in Yunnan Province has developed Cretaceous evaporite-bearing clastic deposits, including the Mangang and Mengyejing Formations which were originally interpreted as fluvial and lacustrine deposits. The Mangang Fm. composed of well-rounded quartz sandstones, were commonly considered as the bottom part of the Mengyejing salt series. Dttring last decades,

关键词： A Cretaceous Desert-Playa Sedimentary System Controlled the Potash Formation in the Simao Basin is for as were that of

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The Late Cretaceous source-to-sink system at the eastern margin of the Tibetan Plateau:Insights from the provenance of the Lanping Basin

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Geoscience Frontiers 2021年第3期12卷 279-295页

作者： Licheng Wang lijian shen Chenglin Liu Ke Chen Lin Ding Chengshan Wang CAS Center for Excellence in Tibetan Plateau Earth Sciences Key Laboratory of Continental Collision and Plateau UpliftInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Yunnan Geological Survey Kunming 650051China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China

The surface uplift of the Tibetan Plateau(TP)and its geomorphology evolution has triggered aridification of Asia's interior and drainage development at the eastern margin of the ***,how the pre-Cenozoic early growth histories of the TP impact the drainage system and climate is poorly *** Late Mesozoic Lacustrine evaporite-bearing basins on the eastern margin of the TP record significant information on the uplift of the source terranes,source-to-sink system development and climate *** this study,we presented detrital zircon U-Pb ages from the Upper Cretaceous Yunlong Formation in the Lanping Basin,as well as Hf isotopic,petrographic,direct statistical,and multidimensional scaling analyses,and use them to characterize the provenance and reconstruct the drainage *** of the samples have five major age peaks at 200-290 Ma,400-490 Ma,750-1000 Ma,1750-1950 Ma,and 2400-2600 Ma with mostly negativeε_(Hf)(t)values(81%).We infer the sediments are primarily derived from recycled sediments of the Songpan-Garze terrane,and partly from the Sichuan Basin and the Southern Qiangtang terrane,as well as the exposed magmatic rocks of the Yidun Arc and SongpanGarze *** provenance features of the contemporaneous sediments from the Sichuan,Xichang,Chuxiong,and Simao basins indicate a complex hierarchical drainage pattern on the eastern margin of the TP during the Late *** hierarchical drainage system exhibits a complete gradational cycle of lake-basin types from overfilled freshwater Sichuan Basin through balanced fill saline Xichang Basin and underfilled hypersaline Chuxiong,Lanping,Simao,and Khorat Plateau basins from proximal to *** early growth of the TP primarily controlled the drainage and lake-basin evolution by not only causing the uplift and exhumation of the source areas and providing large amounts of clastic material to the proximal sub-drainage areas but also intensifying the aridity and deposition of evaporites.

关键词： Detrital Zircons Drainage Late Cretaceous Source-to-sink Lacustrine Basin Tibetan Plateau

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Degree of Brine Evaporation and Origin of the Mengyejing Potash Deposit：Evidence from Fluid Inclusions in Halite

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 175-185页

作者： shen lijian LIU Chenglin WANG Licheng HU Yufei HU Mingyue FENG Yuexing MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China National Research Center for Geoanalysis Beijing 100037 China Radiogenic Isotope Facility School of Earth Sciences the University of Queensland Brisbane 4072 QLDAustralia

The Mengyejing potash deposit is located in the southern port of the Simao Basin, Yunnan Province, and is hosted in mid-Cretaceous strata. The chemical compositions of fluid inclusions in halite crystals, collected from the level-610 adit in the deposit, were analysed by laser ablation inductively coupled plasma mass spectrometry（LA-ICP-MS）. The results show that the brine is of the Na-K-Mg-Ca-Cl type and has K concentrations that are distinctly higher than those of Mg and Ca, unlike normal brines associated with Cretaceous halite. The high K concentrations indicate that the degree of evaporation of the ancient Mengyejing saline lake was very high, reaching the sylvite deposition stage but rarely reaching the carnallite deposition stage. The trajectory of the H and O isotopic compositions of the brines in the halite-hosted fluid inclusions corresponds to intense evaporation, indicating that the net evaporation exceeded the net inflow of brines. These brine compositions in halite-hosted fluid inclusions were likely formed by the dissolution of previously deposited K-bearing minerals by fresh continental and/or seawater, forming a type of modified seawater, with deep hydrothermal fluids potentially supplying additional potassium. The basin likely experienced multiple seawater incursion, dissolution and redeposition events in a high-temperature environment with high evaporation rates.

关键词： Cretaceous halite fluid inclusions H and O isotopic compositions brine chemical compositions Mengyejing potash deposit Yunnan Province

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卤水型锂资源勘查开发综合评价指标体系构建与应用

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资源与产业 2024年第4期26卷 118-132页

作者：王楠赵艳军刘成林沈立建贺荟文中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 自然资源实物地质资料中心河北廊坊065201 中国地质大学(武汉)资源学院湖北武汉430074 中国地质大学(北京)地球科学与资源学院北京100083

基于指标选择的系统性、可得性、易操作性原则,从影响卤水型锂矿床的地质条件、开采条件、社会经济条件和环境约束条件4个方面优选“成矿地质条件”“卤水Mg/Li比值”等19项具有代表性的评价指标,首次构建了一套卤水型锂资源勘查开发综... 详细信息

基于指标选择的系统性、可得性、易操作性原则,从影响卤水型锂矿床的地质条件、开采条件、社会经济条件和环境约束条件4个方面优选“成矿地质条件”“卤水Mg/Li比值”等19项具有代表性的评价指标,首次构建了一套卤水型锂资源勘查开发综合评价指标体系,可为同类型矿床勘查开发综合评价提供一定的思路和借鉴。运用层次分析法确定指标权重,结合初步确定的各指标参考评价标准,对西藏扎布耶盐湖等5个典型卤水型锂矿床的勘查开发条件进行综合评价,认为影响卤水型锂资源勘查开发的首要因素是地质条件,反映在矿区卤水型锂资源的地质特征、水化学特征和资源禀赋等方面,次要因素是环境约束条件和社会经济条件。柴达木盆地一里坪盐湖的卤水型锂资源勘查开发优势度得分最高,为87.69,其次依次为:察尔汗盐湖别勒滩矿段,得分87.50;西藏扎布耶盐湖,得分85.02;江汉盆地江陵凹陷,得分73.53;马海盐湖,得分56.96。评价结果反映了当前经济社会形势下卤水型锂矿床勘查开发利用的实际情况,可作为卤水型锂资源勘查、投资开发和国民经济发展规划等工作的重要依据,同时验证了评价模型的可操作性和评价方法的可行性。

关键词：卤水型锂资源战略性矿产环境约束层次分析法

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Laser ablation mechanism and performance of glass fiber-reinforced phenolic composites:An experimental study and dual-scale modelling

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Chinese Journal of Aeronautics 2024年第8期37卷 470-485页

作者： Ran BI Pengfei shen Longyu ZHU Zhengzheng MA Chuyang LUO Yongfeng LI lijian PAN Shanghai Key Laboratory of Lightweight Composite Donghua UniversityShanghai 201620China Shanghai High Performance Fibers and Composites Center(Province-Ministry Joint) Center for Civil Aviation CompositesDonghua UniversityShanghai 201620China AVIC Composite Corporation Ltd Beijing 101300China

Both experimental and simulation approaches were employed to investigate the laser ablation mechanism and performances of Glass Fiber Reinforced Phenolic Composites(GFRP).During the ablation process,the difference in thermal conductivities of the glass fibers and the resin matrix as well as their discrepant physical and chemical reactions form a conical ablation *** formation of a residual carbon layer effectively mitigates the ablation rate in the thickness direction.A higher power density results in a faster ablation rate,while a longer irradiation time leads to a larger ablation pit *** account for the variation in thermal conductivity between the fiber and resin,a macro-mesoscale model was developed to differentiate the matrix from the fiber *** element analysis revealed that laser irradiation leads to phenolic decomposition,glass fiber melting vaporization,and residual carbon skeleton *** dual-scale model exhibits precise prediction capabilities concerning the laser ablation process of GFRP,and its accuracy is confirmed through the comparison of simulation and experimental results for the GFRP laser ablation *** model provides a feasible method for performance evaluation and lifetime prediction of GFRP subjected to continuous wave laser irradiation.

关键词： Polymer-matrix composites Continuous-wave laser Microstructural analysis Ablation mechanism Finite element method

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The Formation Model for Marine Potash Deposits within China's Small Continental Blocks

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 225-226页

作者： LIU Chenglin WANG Licheng ZHAO Yanjun CAO Yangtong JIAO Pengcheng shen lijian ZHANG Hua MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral Resources Chinese Academy of Geological Sciences

Chinese geologists have always been expecting to find out a large scale of potash deposits in marine basins,but only one small-middle scale industrial solid potash deposit had been found at Mengyejing in Langping-Sima... 详细信息

关键词： Continental Blocks Marine tectonic strata Ordovician basement thick Tertiary rhythm

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显生宙全球海水化学成分演化及其对蒸发岩沉积的约束

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岩石学报 2018年第6期34卷 1819-1834页

作者：沈立建刘成林中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室北京100037 昆士兰大学地球科学学院放射性同位素实验室

通过搜集显生宙以来不同地质时期内海相碳酸盐岩鲕粒及胶结物矿物成分、钾盐矿床矿物种类及组合特征、蒸发岩盆地中石盐流体包裹体成分,并利用这些资料与人工海水模拟实验得到的石盐中Br分配特征的对比,得出海水成分在5.5亿年以来的显... 详细信息

通过搜集显生宙以来不同地质时期内海相碳酸盐岩鲕粒及胶结物矿物成分、钾盐矿床矿物种类及组合特征、蒸发岩盆地中石盐流体包裹体成分,并利用这些资料与人工海水模拟实验得到的石盐中Br分配特征的对比,得出海水成分在5.5亿年以来的显生宙期间,经历了五个阶段:其中晚元古代至寒武纪早期、二叠纪早期至中生代早期、新生代早期至现今,这些时期的原始海水组成特征系数m(SO_4^(2-))+m(HCO_3^-)/2>m(Ca^(2+)),为Na-Mg-K-SO_4-Cl型海水,此期间沉积的钾盐矿床的钾镁盐矿物主要为钾盐镁矾、无水钾镁矾、杂卤石、硫酸镁石等含MgSO_4矿物,海相鲕粒和碳酸盐胶结物矿物成分为文石;而寒武纪早期至石炭纪、中生代早期至新生代早期,原始海水组成特征系数m(Ca^(2+))>m(SO_4^(2-))+m(HCO_3^-)/2<,为Na-Mg-KCa-Cl型海水,此期间沉积的钾镁盐矿物主要为光卤石和钾石盐,甚至含有溢晶石,海相鲕粒和碳酸盐胶结物矿物成分为方解石。根据石盐流体包裹体成分计算得出:显生宙期间,海水K+含量大部分时间变化幅度较小,为9.3～11.5mmol/kg H_2O(除了石炭纪和晚元古代),平均为10.55mmol/kg H_2O。Mg^(2+)含量在早寒武世≥67mmol/kg H_2O、晚志留世至中泥盆世31～41mmol/kg H_2O、晚古生代≥48mmol/kg H22O、晚白垩世34mmol/kg H_2O和现代55.1mmol/kg H_2O。Ca^+含量在晚元古代至古生代早期≤11mmol/kg H_2O、古生代早期至石炭纪22～35mmol/kg H_2O、石炭纪至中生代早期≤17mmol/kg H_2O、中生代早期至新生代早期19～39mmol/kg H_2O及新生代早期至今7～21mmol/kg H_2O。SO_4^(2-)含量在晚元古代至古生代早期≥23mmol/kg H_2O、古生代早期至石炭纪5～17mmol/kg H_2O、石炭纪至中生代早期13～22mmol/kg H_2O、中生代早期至新生代早期5～19mmol/kg H_2O及新生代早期至今12～29.2mmol/kg H_2O。海水Ca^(2+)与SO_4^(2-)含量的相对变化是控制海相钾盐矿床钾镁盐矿物类型的基本因素。同时,利用以上数据计算得到的显生宙各时期海水[m(Mg^(2+))+m(SO_4^(2-))]/[m(K^+)+m(Ca^(2+))]的变化与各时期海相蒸发岩系石盐层底部的Br含量变化具有同步性,进一步验证了显生宙期间海水成分是不断变化的,是约束海相蒸发岩钾盐矿物类型的主要因素。海水成分变化的控制因素为洋中脊热液和陆地水,其中洋中脊热液起主要作用,而控制这些因素变化的根本原因为板块构造运动。

关键词：显生宙海水成分流体包裹体海相钾盐矿床海相碳酸盐微量元素板块运动

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服务于应用型人才培养的校内开放性实训基地建设策略

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职业技术教育 2016年第2期37卷 53-56页

作者：沈利剑绵阳职业技术学院

校内开放性实训基地建设不仅是应用型人才培养的重要保障,也是创新办学体制机制和人才培养模式、深化教育教学改革的重要抓手。校内开放性实训基地建设包括运行机制建设、硬件条件建设、师资队伍建设和企业文化建设,在建设过程中,针对... 详细信息

校内开放性实训基地建设不仅是应用型人才培养的重要保障,也是创新办学体制机制和人才培养模式、深化教育教学改革的重要抓手。校内开放性实训基地建设包括运行机制建设、硬件条件建设、师资队伍建设和企业文化建设,在建设过程中,针对生产与教学的矛盾、实训运行成本偏高、整体管理难度较大等问题,应遵循教学为本、机制优先、专业差异性和选择性开放的原则。

关键词：应用型人才职业教育校企合作开放性实训基地

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ON CLASSIFICATION OF MEROMORPHIC FUNCTIONS BY THE ZEROS OF THEIR DERIVATIVE

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Science in China,Ser.A 1983年第8期 825-834页

作者：沈力健 Department of Mathematics California Institute of Technology U S A

The real meromorphic function tan z has the property that it has only simple real poles and real zeros, its first derivative has no zeros, and its second derivative has only real zeros. Our result says that it is esse... 详细信息

关键词： show ON CLASSIFICATION OF MEROMORPHIC FUNCTIONS BY THE ZEROS OF THEIR DERIVATIVE real

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