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Mineral Geochemistry of Apatite in the Jiama PorphyrySkarn Deposit,Tibet and its Geological Significance

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 399-415页

作者： YANG Yang TANG Juxing ZHANG Zebin TANG Pan XIE Fuwei ran Fengqin YANG Zongyao YANG Huaichao BAI Yun SUN Miao QI Jing School of Earth Sciences Chengdu University of TechnologyChengdu 610059China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing 100037China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China The Key Laboratory of the Ministry of Education on Solid Waste Treatment and Recycling School of Environment and ResourceSouthwest University of Science and TechnologyMianyangSichuan 621010China Chengdu Surveying Geotechnical Research Institute Co. Ltd.of MCCChengdu 610023China Sichuan Tianfu Mining Investment Co. Ltd.Chengdu 610055China Sichuan Institute of Comprehensive Geological Survey Chengdu 610081China

The Jiama deposit,a significant porphyry-skarn-type copper polymetallic deposit located within the Gangdese metallogenic belt in Tibet,China,exemplifies a typical porphyry metallogenic ***,the mineral chemistry of its accessory minerals remains under-examined,posing challenges for resource assessment and ore.*** electron microprobe analysis and LA-ICP-MS analysis,this study investigated the geochemical characteristics of apatite in ore.bearing granite and monzogranite porphyries,as well as granodiorite,quartz diorite,and dark diorite porphyries in the *** also delved into the diagenetic and metallogenic information from these geochemical *** findings include:(1)The SiO_(2) content,rare earth element(REE)contents,and REE partition coefficients of apatite indicate that the dark diorite porphyry possibly does not share a cogenetic magma source with the other four types of porphyries;(2)the volatile F and Cl contents in apatite,along with their ratio,indicate the Jiama deposit,formed in a collisional setting,demonstrates lower Cl/F ratios in apatite than the same type of deposits formed in a subduction environment;(3)compared to non-ore.bearing rock bodies in other deposits formed in a collisional setting,apatite in the Jiama deposit exhibits lower Ce and Ga *** might indicate that rock bodies in the Jiama deposit have higher oxygen ***,the marginal variation in oxygen fugacity between ore.bearing and non-ore.bearing rock bodies within the deposit suggests oxygen fugacity may not serve as the decisive factor in the ore.hosting potential of rock bodies in the Jiama deposit.

关键词： apatite metallogenesis mineral geochemistry porphyry Jiama Tibet

中国式现代化视角下中国铁矿石类大宗商品对外贸易定价权研究

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价格月刊 2024年第6期 11-18页

作者：云乐鑫潘信然青岛理工大学商学院山东青岛266520 波士顿大学大都会学院马萨诸塞波士顿02215

改革开放以来中国经济发展迅速,逐渐步入工业化中后期阶段,对各类大宗商品的需求与日俱增。在国际市场,中国作为全球大宗商品重要的贸易国与消费国,缺乏对大宗商品定价权的影响力,受大宗商品国际价格波动影响较大,在国际大宗商品贸易中... 详细信息

改革开放以来中国经济发展迅速,逐渐步入工业化中后期阶段,对各类大宗商品的需求与日俱增。在国际市场,中国作为全球大宗商品重要的贸易国与消费国,缺乏对大宗商品定价权的影响力,受大宗商品国际价格波动影响较大,在国际大宗商品贸易中较为被动。基于国际铁矿石贸易市场的基本现状,以铁矿石为切入点,分析了当前中国在国际大宗商品的定价权,根据国内大宗商品进口贸易情况,探讨了在国际贸易中中国大宗商品定价权缺失的原因,并提出了相关对策建议。

关键词：大宗商品铁矿石贸易定价权对外贸易

Reductive leaching of manganese from low-grade pyrolusite ore.in sulfuric acid using pyrolysis-pretreated sawdust as a reductant

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International Journal of Minerals,Metallurgy and Materials 2016年第3期23卷 241-246页

作者： Ya-li Feng Shi-yuan Zhang Hao-ran Li School of Civil and Environmental Engineering University of Science and Technology Beijing National Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences

Manganese （Mn） leaching and recovery from low-grade pyrolusite ore.were studied using sulfiaric acid （H2SO4） as a leachant and pyrolysis-pretreated sawdust as a reductant. The effects of the dosage of pyrolysis-pretreated sawdust to pyrolusite ore. the concentration of sulfuric acid, the liquid/solid ratio, the leaching temperature, and the leaching time on manganese and iron leaching efficiencies were inves- tigated. Analysis of manganese and iron leaching efficiencies revealed that a high manganese leaching efficiency was achieved with low iron extraction. The optimal leaching efficiency was determined to be 20wt% pyrolysis-pretreated sawdust and 3.0 mol/L H2SO4 using a liq- uid/solid ratio of 6.0 mL/g for 90min at 90℃. Other low-grade pyrolusite ore. were tested, and the results showed that they responded well with manganese leaching efficiencies greater than 98%.

关键词： manganese ore.treatment pyrolusite sawdust pyrolysis leaching manganese

The dark side of technological advances in analysis of microbial ecosystems

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Journal of Animal Science and Biotechnology 2019年第3期10卷 579-589页

作者： Mick Bailey Amy Thomas ore.Francis Christopher Stokes Hauke Smidt Bristol Veterinary School University of BristolLangford HouseLangfordBristol BS40 5DUUK Laboratory of Microbiology Wageningen University&ResearchNL-6708 WageningenWENetherlands

Recent technological advances mean that samples from animal experiments may be analysed more.cheaply,more.easily and with a much greater return of data than *** groups are frequently faced with a choice of continuing to use established technology in which they may have made a significant investment of time and resources,and have significant amounts of reference data,or switching to new technology where reference data may be *** from cost,the choice needs to be based on a comparison between the increase in data available from future experiments by switching and the value of comparison with reference data from historical experiments analysed with earlier *** approach to this problem is to ensure that sufficient quantity and variety of samples are taken from each experiment and appropriately store. to allow re-establishment of a sufficiently large reference set and to avoid the need to repeat animal *** establishment of ‘biobanks' of experimental material will require funding for infrastructure,consistent storage of metadata and,importantly,horizon-scanning to ensure that samples are taken appropriately for techniques which will become accessible in *** biobanks are a recognised resource in human medicine,where the value of samples increases as more.analysis is carried out and added to the metadata.

关键词： Biobanking Experimental design Horizon-scanning Microbiome Replacement Reduction Refinement Technological advances

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1988年1月17—18日风暴波的模拟

河口与海岸工程 1990年第1期 43-48页

作者： ore.,WG 虞开森

陕西省宁强县潘家坝地区金矿成矿地质条件分析

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世界有色金属 2024年第5期 100-102页

作者：党超冉中国冶金地质总局西北局六队陕西汉中723000

潘家坝地区位于可可西里-巴颜喀拉中生代造山带-摩天岭地块-碧口构造楔与龙门山-阳平关早古生代裂谷的交接部位,属摩天岭加里东褶皱带文县—勉县褶皱束西段,区内褶皱、断裂及节理十分发育,且工作区地层主要为碧口岩群二亚群中基性火山岩... 详细信息

潘家坝地区位于可可西里-巴颜喀拉中生代造山带-摩天岭地块-碧口构造楔与龙门山-阳平关早古生代裂谷的交接部位,属摩天岭加里东褶皱带文县—勉县褶皱束西段,区内褶皱、断裂及节理十分发育,且工作区地层主要为碧口岩群二亚群中基性火山岩组(Pt_(2-3)bk^(2)),该地层中Au等元素丰度高于地壳的1.3~3.2倍,同时岩体侵入活动,为成矿流体形成、迁移提供热源,故有良好的成矿条件。

关键词：潘家坝地区成矿条件

维普期刊数据库博看期刊

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陶瓷过滤机膜污染影响机制研究现状及展望

现代化工 2024年第S1期44卷 47-51,58页

作者：程燃薛锦刘海田蒙奎贵州大学化学与化工学院贵州贵阳550025 瓮福(集团)有限责任公司中低品位磷矿及其伴生资源高效利用国家重点实验室贵州福泉550599

陶瓷过滤机是利用无机陶瓷膜机械强度高、耐腐蚀、易于再生等特点而制备的真空过滤设备,广泛应用于金属、非金属等矿产资源的分离提纯。在其运行过程中,膜污染问题是限制其能效的关键因素。对陶瓷过滤机膜污染控制相关研究进行了综述,... 详细信息

陶瓷过滤机是利用无机陶瓷膜机械强度高、耐腐蚀、易于再生等特点而制备的真空过滤设备,广泛应用于金属、非金属等矿产资源的分离提纯。在其运行过程中,膜污染问题是限制其能效的关键因素。对陶瓷过滤机膜污染控制相关研究进行了综述,重点概述了进料液特性、膜特性及运行条件等对陶瓷膜过滤过程中膜污染的影响,并对膜污染控制策略提出了建议。

关键词：陶瓷过滤机陶瓷膜膜污染

Evolution of the upper earth crust in the southwest area of Yangtze terrain and its influence on the formation of Carlin-type Au ore.deposits

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Chinese Science Bulletin 1999年第S2期44卷 220-221页

作者： CHEN Xiaozhong and LI Chaoyang Open Laboratory Laboratory of ore.Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Open Laboratory Laboratory of ore.Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

1 Outline of the Yangtze terrain THE northwestern area of Sichuan and the joined area of Yunnan, Guizhou and Guangxi are the two majorfields where lots of Carlin-type Au ore.deposits are located. Both of them belong to the western area ofYangtze terrain. The evolution of Yangtze terrain affected profoundly the geological evolution in these areas. Many epithermal ore.deposits, such as Carlin-type gold, lead, zinc, mercury, stibium and arsenic,occur in the these areas, due to the evolution of crust in Yangtze terrain. The foundation of Yangtze terrain shows a structure of three stories, mainly composed of the Proterozoic clastic rocks and carbonic rocks that were involved in low-middle grade metamorphose. The meaningof the Yangtze terrain changed according to several geological times, which can be said that the activity ofYangtze terrain changed in the past. The Yangtze terrain undertook several processes of landmass hyper-

关键词： Yangtze terrain extending basin Carlin-type Au ore deposit.

Safe mining practices under wide spans in underground non-caving mines——Case studies

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International Journal of Mining Science and Technology 2019年第4期29卷 535-540页

作者： J.J.ran Kinross Gold Corporation

Mining under wide span is of concern as it increases the probability of back caving causing personnel injury and equipment damage in underground mines in open stoping and underhand drift-and-fill *** restricting personnel access to well supported lateral development is commonly practiced,it is not always possible to implement this requirement due to various factors such as ore.loss control,drilling equipment limitations,availability of remote operating capacity and consideration of *** with rules implemented to limit personnel entry into openings with wide spans,the hazards of equipment damage and back caving still *** the years,different practices have been reported and adopted to minimize risks associated with exposure to large spans in various underground *** from these practices are beneficial to current and future mines with challenges of safe extraction of thick deposits in a non-caving *** paper briefly summarizes practices in mining wide ore.odies using the open stoping method without personnel access and underhand mining using the drift-andfill method with personnel exposure in the industry and presents cases from Kinross mines where the hanging pillar design was tested,and stope backs were naturally and artificially supported for extraction under wide spans using the open stoping method.

关键词： Mine safety Wide span Back stability Underhand mining Hanging pillar