检索结果-南通市图书馆

Chronological and geochemical studies of granite and enclave in Baimashan pluton, Hunan, South china

在线全文

学校读者我要写书评

暂无评论

Science china Earth Sciences 2007年第11期50卷 1606-1627页

作者： CHEN WeiFeng1, CHEN PeiRong1, HUANG HongYe2, DING Xing1,3 & SUN Tao1 1 State Key Laboratory of Mineral Deposit research, Department of Earth Sciences, Nanjing University, Nanjing 210093, china 2 research institute no.230, cnnc, changsha 410011, china 3 Guangzhou institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, china 1. State Key Laboratory of Mineral Deposit research Department of Earth Sciences Nanjing University Nanjing 210093 China 2. research institute no.230 CNNC Changsha 410011 China 3. Guangzhou institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

Zircon LA-ICP-MS U-Pb dating reveals that the Baimashan Pluton is composed mainly of late Indosinian (204.5±2.8 Ma-209.2±3.8 Ma) biotite granodiorites/monzonitic granites (LIGs) and early Yanshanian (176.7±1.7 Ma) two-micas monzonitic granites (EYGs), and the coeval (203.2±4.5 Ma-205.1±3.9 Ma) mafic microgranular enclaves (MMEs) are generally found in the former. In addition, the ages of cores within zircons from LIGs and MMEs ranging from 221.4±4.0 Ma to 226.5±4.1Ma provide evidence of multistage magma intrusion during Indosinian in the study area. Measured 3010±20.6 Ma of inherited zircon age suggests that there may be recycling Archaean curstal material in existence in this area. LIGs and EYGs share some similar geochemical features: subalkaline and peraluminous granites, enrichment of Th, U, K, Ta, Zr, Hf and LREE but depletion of Ba, Nb, P, Ti and Eu, low εNd(t) values but high (87Sr/86Sr)i ratios, and old T2DM (ca. 1.9-2.0 Ga). The behaviors of incompatible elements and REE are mainly dominated by fractional crystallization of plagioclase, K-feldspar, ilmenite and apatite, but that of Sr isotope mainly controlled by EC-AFC. They are crust-sourced and derived from partial melting of paleo-Proterozoic metagreywackes and related to biotite dehydration melting. LIGs are formed in post-collisional tectonic setting as crustal local extension and thinning during late Indosinian. But EYGs may be evolved products of congeneric granitic magma with LIGs formed in late Indoinian, which were emplaced again when crust underwent extensive thinning and extension in post-orogenic tectonic setting during Yanshanian in SC after undergoing EC-AFC. MMEs should be cognate enclaves and derived from liquid immiscibility of host magma.

关键词： granite,mafic microgranular enclave,zircon LA-ICP-MS dating,lithogenesis,EC-AFC

Top 10 Influential Events in carbon neutrality and climate change response for 2023

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2024年第1期18卷 1-3页

作者： research institute of Carbon Neutrality of Shanghai Jiao Tong University research institute of Carbon Neutrality Shanghai Jiao Tong UniversityShanghai 200240China

In 2023, the global community intensified its efforts towards achieving carbon neutrality and addressing climate change, witnessing several impactful events. research institute of Carbon Neutrality, Shanghai Jiao Tong University compiled the Top 10 Events (in chronological order) in the field of global carbon neutrality and climate change response for 2023, to share with readers these significant moments that document the ongoing ambition and collective efforts of human society.

关键词： neutral collective intensified

中国政治经济学年度发展报告（2023）（下）

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

政治经济学评论 2024年第3期 90+207-208页

作者： Center for Studies of Contemporary Political Economy,research institute for 21st-Century Marxism,Nankai University·University of Chinese Academy of Social Science Center for Teaching and research on Capital,Renmin University of china National institute of Socialist Political Economy with Chinese Characteristics,Renmin University of china 南开大学·中国社会科学院大学21世纪马克思主义研究院当代政治经济学研究中心中国人民大学《资本论》教学与研究中心中国人民大学全国中国特色社会主义政治经济学研究中心

编者按2023年，高质量发展扎实推进，新质生产力加快形成，我国经济总体回升向好，圆满实现发展主要预期目标。为针对性地破解经济恢复发展中的难题，聚焦推进中国式现代化进程中的重点、难点问题，中国政治经济学界开展系统深入研究，...

编者按2023年，高质量发展扎实推进，新质生产力加快形成，我国经济总体回升向好，圆满实现发展主要预期目标。为针对性地破解经济恢复发展中的难题，聚焦推进中国式现代化进程中的重点、难点问题，中国政治经济学界开展系统深入研究，取得系列代表性成果。为准确刻画学界研究进展和轨迹，推动中国经济学理论体系的构建和完善，本刊精选议题如期奉上《中国政治经济学年度发展报告（2023）》。自2010年起，本刊连续十四年发布《中国政治经济学年度发展报告》，“年度发展报告”专栏已成为本刊标志性特色栏目。2023年报告聚焦12个专题，分为（上）（下）两篇，其中专题1—6于报告（上）篇刊登，专题7—12由报告（下）篇刊登。2023年报告（下）选题如下：

关键词：

METALLOGENIC REGULARITIES OF LARGE CONCEALED AND BLIND URANIUM DEPOSITS AND METALLOGENIC PROGNOSIS BY SYNTHETIC INFORMATION IN GRANITIC EXOCONTACT ZONES──Taking Eastern Hunan and Adjacent Areas as Examples

同方期刊数据库人大复印报刊资料评论

在线全文

学校读者我要写书评

暂无评论

Geotectonica et Metallogenia 1998年第Z1期22卷 77-89页

作者： Fang Shiyi(research institute 230, Zhongnan Geological Bureau, cnnc, changsha 410011)

Under the guide of advanced theories of geosciences, new technology and methods of prospecting, integrating sedimentation, magmatic emplacement, metamorphism and deformation with mineralization by means of intersectional subjects, the author has revealed that the geodynamic setting of formation of uranium deposits of granitic exocontact zone type in eastern Hunan and neighbouring areas has a specia1 stretching strike-slip structure, a special thermal rock series,a special texture and composition of the crust and mantle, elaborated the macroscopic and microscopic features of stretching decollement faults in the Mingyuefeng area, and summed up the metallogenic regularities of typical uranium deposits, factors for a genetic mode1 and the criteria for prospecting by synthetic information, on the basis of which he has made prognosis of concealed and blind uranium deposits.

关键词： Continental decollement structure model for prospecting by synthetic information concealed and blind uranium deposits eastern Hunan and neighbouring areas

An Overview of Mineral Processing in china

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2001年第2期20卷 69-73页

作者： Quanyuan Chen, Jingshen Zhang, Dianzuo Whng (changsha research institute of Mining and Metallurgy, changsha 410012, china General research institute for Nonferrous Metals, Beijing 100088, china) changsha Res Inst Min & Met Changsha 410012 Peoples R China Gen Res Inst NonFerrous Met Beijing 100088 Peoples R China

The latest progress in mineral processing in china is described. It is also pointed out that the existing technology can not meet the needs of economic development. The combined challenges of poor resources, economical benefits and environmental pollution issues require further research to upgrade the separation efficiency economically. The methods of mineral processing should play a more important part in waste treatment such as wastewater treatment, the remediation of contaminated soil and the recycling of wastes. Biomineral technology will be utilised in the near future.

关键词： mineral processing biomineral technology comminution ore waste treatment

北京城市副中心0701街区D#地块住房百年住宅示范项目

在线全文

学校读者我要写书评

暂无评论

建筑实践 2024年第3期 96-103页

作者： china institute of Building Standard Design & research Co., Ltd. 中国建筑标准设计研究院有限公司

北京城市副中心是规划建设疏解北京非首都功能、推动京津冀协同发展的历史性工程。项目对于落实首都城市战略定位、建设国际—流的和谐宜居之都,对于建设以首都为核心的世界级城市群,都具有十分重大而深远的意义。项目规划设计打破传统...

北京城市副中心是规划建设疏解北京非首都功能、推动京津冀协同发展的历史性工程。项目对于落实首都城市战略定位、建设国际—流的和谐宜居之都,对于建设以首都为核心的世界级城市群,都具有十分重大而深远的意义。项目规划设计打破传统封闭社区规划模式,以小街区密路网、开放式社区的设计骨架,用半围合式住宅,院落内外高差处理等设计手法打造和谐、有序而具有活力的多元示范住区。

关键词：

Abnormal gradient microstructure in Cr_3C_2 based cemented carbide

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Central South University of Technology 2001年第4期8卷 224-227页

作者： ZHANG Li 1,CHEN Shu 2 (1. Powder Metallurgy Factory, Central South University, changsha 410083, china 2. changsha research institute of Mining and Metallurgy, changsha 410012, china) 1. Powder Metallurgy Factory Central South University 410083 Changsha China 2. changsha research institute of Mining and Metallurgy 410012 Changsha China

With OLYMPUS PMG3 metallograph, an abnormal three-layer gradient structure, i. e. coarse grain zone, binder enrichment zone and normal structure zone from surface to inner, was observed in Cr3C2 based cemented carbide. In the binder enrichment zone, three different shapes of anomalous coarse carbides were observed. It is shown that the transverse rupture strength can be raised remarkably, up 20.7%from the alloy with abnormal gradient structure by removing the abnormal gradient structure. The results suggested that the abnormal gradient structure in the surface, especially the anomalous coarse carbides in the binder enrichment zone is the main reason for the lower strength

关键词： Cr3C2 based cermet cemented carbide gradient structure microstructure

FRACTURE TECTONOGEOCHEMISTRY AND URANIUM MINERALIZATION──Taking the uranium deposit 3110 as an example

在线全文

学校读者我要写书评

暂无评论

Geotectonica et Metallogenia 1998年第Z2期22卷 160-166页

作者： Fang Shiyi(institute 230, Zhongnan Geologic Bureau, cnnc, changsha 410011)

A preliminary study on macroscopic geological structure, microscopic structure of brittle-duc-tile de formation, tectonogeochemistry and zoning regularity of uranium deposits under high shear-ing stress is made in many uranium deposits. Tectonodynamic metallogeny of uranium by strongshear stress is also discussed. It points out that characteristics of uranium deposits should be paidgreat attention in expIoration and prospecting.

关键词： Fracture tectonogeochemistry tectonodynamic metallogeny uranium metallogeny

眉山天府新区人民医院一期（西南医科大学附属天府医院）

在线全文

学校读者我要写书评

暂无评论

建筑实践 2024年第5期 134-141页

作者： china Southwest Architectural Design and research institute Co., Ltd. 中国建筑西南设计研究院有限公司

西南医科大学附属天府医院位于四川省天府新区眉山片区,南临环天府新区快速路,东靠益州大道南延线。项目统—规划、整体设计、分期实施,采用“近期850床综合医疗+远期独立专科医学中心”的模式。总图布局设计以院感管控为线索,按照各楼...

西南医科大学附属天府医院位于四川省天府新区眉山片区,南临环天府新区快速路,东靠益州大道南延线。项目统—规划、整体设计、分期实施,采用“近期850床综合医疗+远期独立专科医学中心”的模式。总图布局设计以院感管控为线索,按照各楼栋功能的洁污关系布置后勛区、科研办公区、主要医疗区、传染病区及污物区。

关键词：