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。     

平泉县洼子店金矿区碾子沟矿段矿床地质特征

本文通过分析平泉县洼子店金矿区碾子沟矿段的成矿地质条件,认为Cu、Pb、Zn、Au、Ag矿化与围岩关联不明显,而与构造有密切关系,岩体内异常组合Mo、Bi、W、Mn、Hg、Au、Cu、Ag主成矿元素与Au、Cu相关性较高,激电异常峰值较明显的点异常由埋藏较浅的隐伏矿体所引起。矿化特征主要为细脉浸染状金(铜)矿化、接触带上金(银)矿化、斑岩中的浸染状金矿化以及地表风化残积型金矿化;矿体似层状,稳定;以黄铁矿为主,呈具自形-半自形-它形粒状结构、交代结构、填隙结构、碎裂结构等结构,以浸染状构造为主,有益、有害元素含量均微少。经历了早期磁铁矿-钛铁矿阶段,热液活动的黄铁矿阶段,形成以黄铜矿-方铅矿-闪锌矿为主,伴生少量辉铜矿、砷黝铜矿为主的硫化物阶段,之后形成细脉状、浸染状硫化物矿石,在压扭性构造活动期下,构造热液使岩石发生蚀变并伴有金矿形成。     

青海省然者涌－东莫扎抓成矿带成矿规律及远景分析

通过对然者涌－东莫扎抓区域构造背景的研究,分析了东莫扎抓、然者涌和阿夷则玛3个研究程度较高的矿床的矿体赋存规律,矿石结构构造和矿床成因类型。再结合资源形成地质背景和时空分布特征,划分出了拉美曲-阿夷能Cu、Pb、黄铁矿、石膏;巴纳赛-龙哇莫果Cu、Pb、Zn、Ag;东脚涌-俄弄 Cu、Pb、Zn、Au、Ag;阿阿牙赛-东莫扎抓Pb、Zn、Ag、Cu等4个成矿远景区。在该四个远景区内除了已发现的17处矿(床)点外,又新发现矿点8处,成因类型以热液型、沉积型矿(床)点为主,次为矽卡岩型和斑岩型。综合研究认为,然者涌－东莫扎抓地段具有较好的Cu、Pb、Zn多金属成矿和找矿前景。     

马山铜多金属矿地质—地球化学特征

马山矿床属中温热液裂隙充填交代矿床,矿化热液来源于晚期花岗岩侵入及火山喷溢活动.主要构造特征表现为层间挤压破碎充填和层间挤压破碎交代.近矿围岩蚀变为黑云母化、石榴石化、绿泥石化,次为硅化、绢云母化.矿区地处新华夏系莲花山断裂带,构造活动频繁,并伴随有大量的岩浆岩侵入和火山作用.矿区内及矿区外围以发现多处Cu、Pb、Zn、Sn等多金属矿床(矿点)及Cu、Pb、Zn、Sn等元素组合异常多处,该区具有良好的成矿地质构造条件,是寻找与火山沉积岩系有成因联系的铜多金属矿床远景区.     

云南个旧高峰山矿段锡多金属矿床成矿元素富集机制分析

为查清云南个旧矿区高峰山矿段锡铜多金属矿的成矿作用,以及矿体内主要赋存元素Sn、Cu、Pb、Zn、W等是否能回收利用。对高峰山矿段的典型控矿地带——花岗岩体凹陷带内坑钻所揭露矿体取样,制成薄片在显微镜下进行详细的矿物及结果观察,查明矿物的组成、共生关系、生成顺序和赋存形式。同时将全部样品进行矿石化学元素性质定量分析,分析元素及组成主要有Sn、Cu、Pb、Zn、WO₃,然后采用SPSS统计软件作R型聚类分析。研究结果显示高峰山矿段锡铜多金属矿为多期多阶段热液同位叠加成矿作用结果,且Sn、Cu、Pb、Zn、W等元素主要以独立矿物形式产出,易于解离,有利于选矿回收。为今后生产勘探过程中综合评价工作、矿石的开采方案制定和综合回收选矿流程的制定提供基础的地质资料。     

西山煤田马兰矿区8号煤及其夹矸的微量与稀土元素地球化学特征

运用X射线衍射分析(XRD)、电感耦合等离子体质谱(ICP-MS)及常规化学分析方法对马兰8号煤顶板、煤样、夹矸及黄铁矿结核中的矿物组成、微量与稀土元素及常量元素等地球化学特征进行了分析。结果表明,与美国大部分煤、中国大部分煤及华北石炭二叠纪煤对比：煤样中富集Li、Zn、Ga、Sr、Hf、U、Zr、W、Sn和REEs等元素;顶板样品中富集V、Cr、Zn、Rb、Cs、Sr、Hf、U、Zr、W、Tl、Pb、Ni和REEs等元素;夹矸中富集Li、V、Cu、Ga、Sr、Ba、Hf、Th、U、Zr、Sn、W、Pb和REEs等元素;黄铁矿结核中富集Cr、Cu、As、Se、Cd、Sb、W、Tl和Pb等元素,其中有害微量元素V、Cr、Ni、Cu、Zn、As、Se、Ba、Th、Cd、Sn、Sb、Tl和Pb主要分布在黄铁矿结核、顶板及夹矸中。稀土元素分布模式表明,煤层稀土元素主要来源于陆源碎屑,同时受海水的影响,不同分层受海水影响程度不同。稀土元素含量与灰分产率的相关性分析,以及与Al和Si等造岩元素含量的聚类分析表明,马兰8号煤层稀土元素主要赋存于黏土矿物之中。     

加拿大新布伦瑞克Heath Steele矿山中的矿石矿物学研究及影响从中回收金属和微量元素的因素

对加拿大新布伦瑞克Heath Steel选矿厂的原矿、精矿和尾矿的矿物学进行了详细的研究,以便确定主要矿石矿物的解离度和回收率,并查明微量元素的赋存状态和分布规律。1977年8月间,细磨矿石的元素平均含量(重量％):Zn4.34％,Cu1.25％,Pb1.64％,Ag90克/吨。矿石中主要微量元素为Ag、Cd、In、Co、Sb、Bi、As、Hg、Sn和Au。Ag呈固溶体状态赋存于黝铜矿—砷黝铜矿、方铅矿、As—Sb的含硫酸盐、Pb—Bi—Sb的含硫酸盐中。大约有一半的Ag被回收到Pb和Cu精矿中,其余部分损失在尾矿和Zn精矿中。由于主要的含Ag矿物也含有Sb和Bi,所以,用选矿方法回收Ag时,也将同时回收对提取冶金有害的元素。Cd、Hg和大部的In呈固溶体状态存在于闪锌矿中,从而被回收到Zn精矿中。部分In也呈一种次要的未查清的含铟矿物被回收到Cu精矿中。Co和As主要赋存于毒砂、辉砷钴矿、Co—Fe硫砷化物、黄铁矿和磁黄铁矿中,结果,这些矿物都进入尾矿。因此,在回收有价元素Co时,便会同时回收污染环境的元素As。矿石被磨至-270目粒级约占80％。在这一磨矿粒度下,单体的闪锌矿占71％,黄铜矿占66％,方铅矿占59％。在Zn、Cu和Pb精矿中,单体的闪锌矿、黄铜矿和方铅矿的回收率分别为85％、76％和80％;在Zn、Cu和Pb精矿中连生体的闪锌矿、黄铜矿和方铅矿的回收率分别为48％、5％和7％。尾矿中有些连生体的闪锌矿和黄铜矿的颗粒较大,通过细磨可使其解离。     

锡铁山北西矿区岩石地球化学特征及找矿方向

锡铁山北西铅锌矿区位于柴达木地块北缘古生代裂谷带的中基性火山-沉积岩系中,成矿和改造的地质过程与柴达木地块周边地质演化有密切关系。全区地层(Pt1dk-O3tn-D-C)总体富集Cu、Pb、Zn、Ag、Au、As、Sn、Bi、Mn,反映该区是一个Cu、Pb、Zn、Ag、Au高背景区。通过岩石地球化学测量,显示出本区Au、Ba元素贫化,As、Hg强富集,Cu、Ag富集,为高背景区。Zn、Pb、Mn、Sb略富集,Pb、As元素变化数系大,Ba、Sb、Ag变化较大,存在较强分异性,矿化活动较强烈。元素组合异常自北东依次可划分为六个组合异常,显示出该区紧邻锡铁山主矿区较好的找矿前景,远离主矿带的西部区域,成矿环境和异常显示较弱。     

辽宁高家岭多金属矿地质特征及找矿标志探讨

高家岭矿床是2011-2012年发现并勘查的以铜金银为主要有用元素的隐伏次火山热液型多金属矿,矿石类型可分为金银铜型矿石和铜银型矿石,不同类型矿石具有垂直和水平分带特征。矿床的形成受基底地层、构造、岩浆岩联合控制。蚀变火山角砾岩筒、次级断裂构造、次火山岩体是成矿有利因素;Au、Ag、Cu、Pb、Zn元素异常套合部和高磁负异常与激发极化异常套合部是成矿有利地段;碳酸盐化、硅化、绢云母化及多金属硫化物蚀变是矿（体）化赋存的主要标志。     

地球化学元素分布特征分析在找矿中的应用——以江西省遂川县金坑金矿为例

以江西遂川金坑土壤化学采样为研究对象,对研究区内土壤中十种金属元素Au、Ag、As、Sb、Cu、Pb、Zn、W、Bi、Sn的化探数据进行了分析,运用概率统计分析,剔除特高、特低含量值,形成数据正态分布,运用MAPGIS的空间分析能力,圈定十种金属元素的异常范围,得到土壤中十种金属元素分布状况及其特征.通过主成分分析,减少了综合异常圈定的影响因素.结果发现Au、Ag、Cu、Pb、Zn等地球化学异常密集分布,这些发现将对进一步勘查提供有力的支持.     

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     

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     

2014 second batch of rare earth quota released

正~~     

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     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.