石湖金矿侵入岩地质地球化学特征

石湖地区发育的侵入岩由分布在研究区西北部的麻棚岩体和遍布全区的中酸性脉岩组成,两者的岩石化学和地球化学特征较为相似,都属高钾钙碱性系列岩石,可能为一套具有成因联系的岩石系列。稀土和微量元素研究表明其岩浆形成深度较大,且岩浆在演化过程中经历了不同程度的陆壳混染,成因类型为I型花岗岩,构造环境属于火山弧花岗岩。     

湖北泗峡口微细浸染型金矿含矿岩系的岩相古地理

新发现的泗峡口微细浸染型金矿颇具找矿前去。其赋矿层位为上泥盆统南羊山组（D3n），含矿岩系具浊积岩相组合特征；其地球化学特征表明，含矿岩系的物源区介于大陆岛弧与活动陆缘之间的过渡环境，这一结论对研究本区岩相古地理和寻找同类矿床，具有重要意义。     

新疆梧桐沟铜矿床成矿特征及找矿标志探讨

梧桐沟铜矿床是新疆东南天山发现的一种新类型铜矿,矿床产于下泥盆统阿尔彼什麦布拉克组上亚组中-酸性火山岩和火山碎屑岩地层中,容矿岩石为熔结凝灰岩、凝灰质砾岩和酸性斑岩,成矿作用与构造、脉岩及蚀变密切相关.通过矿区成矿地质特征、矿石矿物特征、地球化学特征的分析研究,将其划归为陆相火山热液脉型铜矿床,并对该矿床找矿标志进行了探讨.     

印尼苏门答腊岛巴东地区埃达克质岩地球化学特征和构造环境

根据苏门答腊岛巴东地区的岩石化学分析数据与典型埃达克岩进行对比,本文讨论其地球化学特征及其大地构造环境意义。对比结果表明:该地区的埃达克质岩微量元素特征为低Sr含量(一般为3.88×10-6~83.6×10-6),低重稀土元素Y含量(≤20×10-6)和低Yb含量(≤1.9×10-6),低Sr/Y比值(1.09~18.55)。在微量元素蛛网图上有Th、Ba正异常峰和强烈的Nb、Ta、Ti等元素负异常。稀土元素La/Yb比值为1.28~35.46,在REE元素配分曲线模式图上显示LREE富集和不富集两种模式,属于C-型和O-型埃达克岩。该地区埃达克质岩的大地构造环境位于洋-陆碰撞带附近的活动大陆边缘火山弧带中,岩浆来源于俯冲板片局部熔融叠加地幔楔的局部熔融和混染(MASH)区。埃达克岩的分布区域与矽卡岩型铜-金矿、铁矿和浅成热泉型金矿成矿带分布相一致,具有重要的指示意义。     

新疆层控型铜矿特征及找矿方向

对新疆层控型铜矿类型及主要矿床、矿点特征进行了描述;对层控铜矿成矿规律,在时空上的分布规律、构造环境控矿规律以及层控铜矿的找矿方向进行了研究,指出火山-沉积层控铜矿以西伯利亚板块南缘克兰火山弧及哈萨克斯坦-准噶尔板块觉罗塔格裂陷槽;沉积型铜矿在西伯利亚板块南缘哈纳斯隆起带震旦纪含铜砂岩及塔里木板块昆中裂谷带和西缘奥依塔格-库尔良裂陷槽内。找矿方向应以塔里木周边老地块陆缘盆地、裂陷槽和阿尔泰哈纳斯隆起带。火山沉积型铜矿以东西准噶尔、阿尔泰南缘克兰火山弧、伊犁裂谷带、觉罗塔格裂陷槽等。     

印尼苏门答腊岛巴东地区埃达克质岩地球化学特征和构造环境意义

根据苏门答腊岛巴东地区的岩石化学分析数据与典型埃达克岩进行对比,本文讨论其地球化学特征及其大地构造环境意义。对比结果表明: 该地区的埃达克质岩微量元素特征为低Sr含量（一般为3.88×10-6-83.6×10-6）,低重稀土元素Y含量（≤20×10-6）和低Yb含量（≤1.9×10-6）,低Sr/Y比值（1.09-18.55）。在微量元素蛛网图上有Th、Ba正异常峰和强烈的Nb、Ta、Ti 等元素负异常。稀土元素La/Yb比值为1.28-35.46,在REE元素配分曲线模式图上显示LREE富集和不富集两种模式,属于C-型和O-型埃达克岩。该地区埃达克质岩的大地构造环境位于洋-陆碰撞带附近的活动大陆边缘火山弧带中,岩浆来源于俯冲板片局部熔融叠加地幔楔的局部熔融和混染（MASH）区。埃达克岩的分布区域与矽卡岩型铜-金矿、铁矿和浅成热泉型金矿成矿带分布相一致,具有重要的指示意义。     

内蒙古突泉县二龙屯地区中生代火山岩岩石学特征

二龙屯地区火山岩由晚侏罗世满克头鄂博期和早白垩世满克头期火山岩组成,主要岩性为安山岩、粗安岩、英安岩、流纹岩、安山质含角砾岩屑晶屑凝灰岩、英安质含角砾岩屑晶屑凝灰岩、流纹质含角砾岩屑晶屑凝灰岩等。满克头鄂博期火山岩富硅、碱,贫铁、镁、钙,属于过饱和类型火山岩、高钾火山岩。该期火山岩稀土元素含量中等,具有明显的负铕异常。梅勒图期火山岩以中性为主。Si O2含量中等,碱质含量高,钙碱性系列高钾火山岩。其稀土元素含量中等,重稀土相对亏损,并且有比较明显和不明显的负铕异常。综合满克头鄂博期火山岩与梅勒图期火山岩的地球化学特征,认为二龙屯地区晚侏罗世—早白垩世火山岩形成于活动陆缘火山弧构造环境。     

内蒙古巴彦都兰地区侵入岩地球化学特征及构造岩浆演化

巴彦都兰地区侵入岩发育,出露有闪长岩、黑云母花岗岩、钾长花岗岩、正长斑岩、石英正长岩等岩体以及石英脉、细粒花岗岩脉、闪长玢岩脉、辉长岩脉、辉绿(玢)岩脉、煌斑岩脉等脉岩。通过对不同侵入岩样品进行岩石地球化学研究,结合前人已有的锆石U-Pb同位素年龄数据,判断该区不同时代侵入岩产出于不同的大地构造环境。早二叠世侵入岩为在汇聚机制下古洋壳向西伯利亚板块东南缘弧下俯冲,诱发成熟陆缘弧下地壳熔融而形成的最早但规模较小的一次岩浆活动;晚二叠世—早三叠世区域上不仅存在洋—陆碰撞造山,而且也发生过陆—陆碰撞造山过程;中三叠世花岗岩类为两大板块碰撞闭合后,转入伸展体制下岩石圈剥离和热软流圈上涌陆壳熔融形成的;晚侏罗纪,在大规模伸展体制下,幔源底侵,地壳部分熔融,幔源分异形成的基性岩浆、陆壳物质部分熔融形成的酸性岩浆以及二者混合形成的中性岩浆沿深大断裂不同层次上侵,形成了系列基性—酸性深成—超浅成岩浆。     

新疆尼勒克县尼新塔格铁矿地质特征及成因

新疆尼勒克县尼新塔格铁矿位于阿吾拉勒铁、铜、金、铅、锌成矿带中部,通过分析该矿区成矿大地构造背景、地层、岩性、构造、岩浆岩、矿体、蚀变带特征,并结合矿区岩石学、地球化学、同位素及包裹体等研究成果,分析了该铁矿的成矿环境和控矿因素,探讨了成矿地质特征和矿床成因,结果表明:1矿床形成于陆缘火山弧中的海相火山活动中,矿体与幔源的玄武质岩浆分异演化密切相关,层控性强;2火山成岩和成矿岩浆具有同源性、同位叠加特征,次火山作用(隐爆作用)较强,矿体围岩蚀变发育,属海相火山喷流沉积型和次火山气液交代型的复合成因;3成矿流体具有岩浆水与热卤水(加热的海水)混合的特点,全岩矿化、矿石矿物粒度微细,具有多阶段成矿的规律。上述研究成果对于区内找矿勘探工作有一定的参考价值。     

耀岭河群地球化学特征及其意义

笔者通过地球化学经典国解和参数研究了耀岭河群基性火山岩的地球化学特征、构造环境、物源及岩石成因。研究表明，该基性火山岩为稳定－半稳定环境下的张性岩套，喷发物源可能是经原始地幔交代的富集型洋中脊玄武岩，具地慢热栓的特点，显示古板块分别向西南和北东方向扩张。其构造环境属继承早期陆内裂谷发展而成边缘海盆地的大陆边缘裂谷带。     

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