紫金山铜金矿黄铁矿环带结构特征

主要通过对紫金山铜金矿成矿期环带状黄铁矿的特征研究,来探讨成矿期地质环境及成矿作用。利用电子探针对不同深度矿化带中具环带结构黄铁矿的内核和环带中的微区进行化学成分分析,发现环带黄铁矿属于亏铁富硫型。Ni-Co(-As)图解显示环带状黄铁矿为火山—热液成因;环带是主要载金部位,金以纳米级自然金颗粒形式存在。结合本矿矿区地质、矿相学、岩石地球化学特征,认为本矿成矿期环带黄铁矿的形成与本区燕山晚期的火山—岩浆侵入活动密切相关,体现紫金山铜金矿的成矿流体是燕山晚期富含Cu、Au、Pb、Zn等成矿元素的火山热液叠加在燕山早期具有W、Sn、Mo、Bi等矿化的紫金山复式花岗岩岩体上。     

云南普朗斑岩铜矿床矿石矿物特征及成矿期期次研究

为进一步查明普朗铜矿矿床成因,通过收集、分析普朗铜矿区最新的勘探资料和生产资料,对矿床地质特征、矿石矿物特征等进行系统研究。结果表明:硫化矿中金属矿物主要为黄铜矿、黄铁矿、磁黄铁矿及方铅矿,脉石矿物主要为石英、长石、绢云母,造岩矿物为角闪石、黑云母、斜长石。矿床严格受控于岩浆岩、构造和围岩蚀变,自岩体中心往外发育强钾化硅化带(工业铜矿带)→绢英岩化带(铜矿化带)→青磐岩化带(基本无矿化)。结合矿床地质特征、矿物共生组合及矿物穿插交代关系等,将矿床划分为岩浆晚期、热液硫化物期和表生期,其中热液硫化物期为主要成矿期,矿床总体属次火山—热液斑岩型铜矿床,外围北部铅锌矿体、东矿段大脉状铜矿体为与次火山作用相关的热液型矿床。     

印度尼西亚Ciemas浅成低温热液型金矿矿物学特征分析

为了弄清Ciemas金矿矿床成矿地质条件,针对矿石矿物组合、元素分布特征、流体包裹体等问题,进行了矿物学、电子探针及矿物包裹体综合研究。研究表明：矿石矿物组合包括自然金、黄铁矿、毒砂、黄铜矿、锑铅银矿、方铅矿和磁黄铁矿等,蚀变作用主要为硅化、绢云母化、黄铁矿化、绿帘石、泥化等;金与黄铁矿、毒砂关系密切,黄铁矿Fe、S都亏损,相对更亏损Fe,钴镍比值平均13.25,Co含量远大于Ni;矿床主成矿期温度240～320℃,成矿初始深度0.33～1.73 km,氢、氧同位素特征显示成矿流体主要来源于原生岩浆水和极少量的大气降水。矿床矿石具有典型的低温热液矿物组合特征,矿床可能受角闪石英斑岩建造叠加所致,矿床成矿条件符合浅成低温热液金矿床一般特征。     

小干沟金矿地质特征及控矿因素分析

通过对小干沟金矿区地质特征、构造条件、岩浆活动、围岩蚀变、化探异常和金矿化富集特征等进行综合分析,认为该矿床金的主要矿源层为基性火山岩,金矿的富集与热液叠加改造关系密切,控矿因素包括玄武岩、印支期小干沟碱性花岗岩、断层及层间破碎带。综合以上地质特征与控矿因素,初步判定该矿床的成因类型为中低温热液构造蚀变岩型金矿床。     

云南德钦羊拉路农铜矿床矿石矿物特征及成因

路农铜矿床是位于羊拉矿区中部的典型铜矿床之一。通过分析该矿床地质特征及不同矿(化)体特征,并利用镜下鉴定及电子探针等方法,系统研究了矿床内矿石矿物特征及矿床成因,结果表明:1矿床内矿石类型多样,主要为矽卡岩型矿石,矿石主要金属硫化物为黄铜矿、磁黄铁矿、黄铁矿及磁铁矿,矿石构造主要为块状构造、浸染状构造和脉状-网脉状构造,矿石结构主要为自形—半自形粒状结构、交代充填结构及包含结构;2矿床成矿阶段可划分为矽卡岩期、石英-硫化物期及表生期,显示出斑岩-矽卡岩型矿床的典型特征,后期构造热液叠加成矿作用显著。上述分析成果对于区内铜矿床找矿工作有一定的参考价值。     

河南小秦岭金矿床主要载金矿物标型研究

河南小秦岭金矿为石英脉型金矿床,成因类型为岩浆期后热液型。矿石中主要矿物为石英,其次为金属硫化物;金矿物主要为自然金,其次为银金矿和含银自然金、碲金矿,碲金银矿微量。自然金为包体金和裂隙金及粒间金,粒度以中细粒为主,其成色普遍偏高。黄铁矿以中细粒半自形五角十二面体及其聚形含金最高。其中元素含量统计特征规律不明显。热电系数具明显指示作用。石英的晶体特征、元素含量具指示意义。其热发光,红外光谱为矿床评价重要标志。      

紫金山铜金矿床XI号铜矿带流体包裹体研究

紫金山铜金矿床XI号铜矿带位于矿床的深部,是探讨矿床深部是否有斑岩型矿床找矿潜力的理想区段。在资料收集、详细岩矿鉴定的基础上,对XI号铜矿带主成矿阶段与铜蓝、蓝辉铜矿等密切共生的石英开展了流体包裹体的岩相学观察、显微测温和激光拉曼光谱分析。结果表明,XI号铜矿带主要发育液相、气相、CO2和含子矿物多相包裹体;均一温度集中于200~260°C和300~360°C,盐度介于0.35%~33.40% NaCl eqv;包裹体成分主要为H2O、CO2、NaCl、CO2-3,成矿流体属于NaCl-H2O-CO2体系。综合分析发现,XI号铜矿带成矿流体同时具有高硫化型浅成低温热液矿床和斑岩型矿床的特征。因而判断XI号铜矿带为高硫化型浅成低温热液矿床和斑岩型矿床的叠加部位,紫金山铜金矿床为高硫化型浅成低温热液—斑岩型铜金矿床,在其深部有寻找斑岩型矿床的广阔前景。     

紫金山铜金矿床Ⅺ号铜矿带流体包裹体研究

紫金山铜金矿床Ⅺ号铜矿带位于矿床的深部,是探讨矿床深部是否有斑岩型矿床找矿潜力的理想区段。在资料收集、详细岩矿鉴定的基础上,对Ⅺ号铜矿带主成矿阶段与铜蓝、蓝辉铜矿等密切共生的石英开展了流体包裹体的岩相学观察、显微测温和激光拉曼光谱分析。结果表明,Ⅺ号铜矿带主要发育液相、气相、CO_2和含子矿物多相包裹体;均一温度集中于200~260℃和300~360℃,盐度介于0.35%~33.40%NaCl eqv;包裹体成分主要为H_2O、CO_2、NaCl、CO_3~(2-),成矿流体属于NaCl-H_2O-CO_2体系。综合分析发现,Ⅺ号铜矿带成矿流体同时具有高硫化型浅成低温热液矿床和斑岩型矿床的特征。因而判断Ⅺ号铜矿带为高硫化型浅成低温热液矿床和斑岩型矿床的叠加部位,紫金山铜金矿床为高硫化型浅成低温热液—斑岩型铜金矿床,在其深部有寻找斑岩型矿床的广阔前景。     

新疆塔什库尔干县卡拉吉里干皮斯岭铜矿地质特征与矿床成因探讨

详细描述库尔干县卡拉吉里干皮斯岭铜矿地质特征,矿床围岩热液蚀变明显,主要有硅化、碳酸盐化、和黄铁矿化。故工区内成矿类型推断为热液型。从矿床地质特征、矿石物质成分、矿体的赋存地层、侵入岩岩体性质等方面探讨矿床成因,矿石类型属氧化矿。     

湖北省团风县金鸡坳金矿区矿床地质特征及找矿前景分析

团风县金鸡坳金矿区位于湖北省大崎山穹窿南西缘,矿体严格受断裂构造控制,垂向上具有金银矿化向金银多金属矿化转变的特征。矿区储矿构造主要为北西向和近东西向脆性断裂,且其不同方向次级断裂构造的交汇部位为矿化富集有利部位。矿区金成矿事件与燕山期构造—岩浆热液活动关系密切,矿床成因类型为中低温岩浆热液型金矿床。地表及深部地质、地球化学异常显示,祝家冲矿段具有较好的找矿潜力,深部可能存在工业矿体。     

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