初论中国北方的海相碎屑岩碳酸盐岩建造磷块岩—石膏沉积成矿系列

海相碎屑岩碳酸盐岩建造是指形成于古大陆板块边缘滨、浅海环境中的一套由碎屑岩、白云质泥岩、白云岩及少量石灰岩组成的岩石组合。由海洋沉积作用、生物沉积作用和蒸发沉积作用形成的磷块岩、石膏和硬石膏矿床成矿系列赋存其中。它以中国北方古大陆板块边缘下寒武统沉积含矿建造最为特征。本文分析了含矿建造和成矿系列的基本特征，初步探讨了含矿建造和成矿系列的形成条件、成矿作用过程，建立了成矿系列的形成模式。     

我国东北地区早寒武世含膏岩系特征及岩相古地理

东北早寒武世赋存石膏和硬石膏地层为馒头组与碱厂组,石膏岩系主要由石灰岩、白云岩、(硬)石膏岩、砖红色白云质泥岩等组成。早、中寒武世陆缘海分布在辽宁东部与吉林南部,形成滨海堆积碳酸盐岩碎屑岩建造石膏、硬石膏矿床。     

中国的非金属矿床含矿建造

非金属矿床含矿建造是在特定构造环境中,由岩浆侵入和喷出、沉积、风化残留、变质而堆积的具有成因上相关和有联系的特征岩类和特殊的非金属矿含矿性的岩石的共生组合。一定的非金属矿种和它们的一定的成因类型矿床常常赋存在一定的含矿建造中。研究非金属矿床的含矿建造可以更好地了解非金属矿床的形成、分布和出现各矿种之间共生伴生组合关系(成矿系列)的内在规律以指导资源勘查工作。根据已掌握的中国资料可以划分出36种非金属矿床含矿建造。     

乌兹别克斯坦撒马尔罕州昆古尔套矿区石膏矿地质特征及成因分析

乌兹别克斯坦昆古尔套矿区石膏矿分布于泽拉夫尚河流域的山间盆地中,矿床赋存于古近系含石膏、白云岩地层中。本文主要对石膏矿床的区域成矿地质背景、矿区地质特征、矿床地质特征等进行了研究,在此基础上分析了石膏矿成因,对今后在乌兹别克斯坦地区相似地质背景下寻找同类型石膏矿床具有指导意义。     

宁夏石膏矿成矿地质特征与成矿规律分析

石膏矿为宁夏的优势矿种,查明石膏矿产地29处。石膏矿床类型有海相蒸发沉积型矿床和陆相蒸发沉积型矿床两类,矿石类型以块状石膏和泥质石膏为主,早石炭世和渐新世为主要成矿期,主要分布于中卫市、同心县及盐池县等地区。根据对现有矿床(点)成矿地质规律的研究,在宁夏成矿区带的基础上,明确了与石膏资源相关的6个Ⅳ级成矿亚区(带)和3个Ⅴ级矿集区,总结了石膏矿时空分布规律,厘定出3个与石膏相关的矿床成矿系列。提升了石膏矿成矿规律研究的程度,为宁夏石膏矿资源的潜力评价预测工作提供了理论依据。     

中国非金属矿床概要(上)

中国目前已开发利用的非金属矿床按矿物学和岩石学分类原则统计共有115种。这些非金属矿种共有84种矿床成因类型，赋存在47种含矿建造中。中国非金属矿床的共生伴生规律明显，已知有31个成矿系列。所有这些非金属矿床都按一定规律形成和分布；这种时空分布规律与地壳演化有极强的依附关系。中国非金属矿床形成和分布的总体规律可概括为五个方面。就目前掌握的情况看，中国非金属矿床成矿规律的研究，尚有四个方面有待进一步深入探索。     

武平岩前矿区自云岩矿和水泥用灰岩矿地质特征

本文主要阐述了岩前矿区白云岩矿和水泥用灰岩矿矿床的组合形式及矿体产出层序、形态、产状、矿石质量、类型、物质组分和化学成分,对在华东、华南地区寻找白云岩+石灰岩矿床组合具有指导意义.     

河南袁家庄石膏矿矿床地质特征及成因

河南省汝州市袁家庄石膏矿床所属大地构造位置为豫中地区华北地台南缘,矿床赋存于下寒武统朱砂洞组一段含石膏白云岩地层中。本文对该石膏矿床的区域成矿地质背景、矿床地质特征、石膏矿层特征、矿体与矿石等特征进行了系统研究,在此基础上总结了河南省早寒武世石膏矿床成因为海相蒸发泻湖相碳酸盐岩硫酸盐岩沉积型石膏矿床,并归纳了该类石膏矿床的直接和间接找矿标志,对今后在华北地区相似地质背景下寻找同类型石膏矿床具有重要指导意义。     

吉林省非金属矿床成矿系列划分初探

成矿系列指在一定的地质环境中,由统一的成矿作用形成多种矿床(两种矿床以上),在时间、空间、成因上有密切联系的多种矿床类型的总和。它是一个多因素的动态的自然成矿系统,是重大地质事件形成的历史产物。本文在系统归纳、整理和研究吉林省非金属矿含矿建造的基础上,探究非金属矿共生、伴生规律的特定组合,初步划分了吉林省非金属矿成矿系列,以期对非金属矿床规律研究和找矿工作起一定指导和借鉴作用。     

鄂西成矿带成矿地质特征及演化

鄂西成矿带经历了基底、盖层的形成及多期构造—岩浆活动等多阶段演化过程,多样化的成矿地质作用形成了不同的矿床类型。以成矿系列理论为指导,从元古代、早古生代、晚古生代和中生代4个成矿阶段,总结了成矿带内成矿地质演化特征及其与矿床的时空分布、成因组合,划分了11个成矿系列、16个成矿亚系列,建立了19个矿床式。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586