紫金山铜金矿斑铜矿矿物学特征

紫金山铜金矿具有上金下铜的分布特征,金矿床赋存于潜水面之上的氧化带中,铜矿床赋存于潜水面之下的还原带中。铜矿石中有大量的斑铜矿。通过反光显微镜矿相学观察、电子探针、粉晶衍射等手段,分析本区斑铜矿的矿物学特征,并结合硫同位素特征,阐明本矿的成矿特征。研究结果显示,紫金山存在细脉状及它形粒状两种不同赋存状态的斑铜矿。电子探针结果显示,斑铜矿富硫贫铜,且不同赋存状态斑铜矿的主量元素随离火山机构的远近有一定的变化规律。铜硫化物δ34S范围为-5.9‰~3.5‰,具地幔硫特征。结合紫金山铜金矿的区域地质特征、矿床地质特点,从而提出本区斑铜矿具有原生的特征,对本区铜金矿的成因具有重要的指示意义。     

紫金山金矿露采铜矿石赋存形态及成因初探

紫金山金铜矿是具"上金下铜"的特大型金铜共生矿床.金矿和铜矿之间存在20～50 m的无矿带或贫矿带,但随着金矿露采的不断推进,露采场东北部金铜矿联合露采金矿境界外、铜矿境界内原地质勘探报告认为的无矿区域不断揭露出低品位金矿体和少量高品位铜矿体.对铜矿体空间分布、形态特征和矿物组成进行初步分析及成因探讨,表明区内铜矿石主要分布在氧化淋滤亚带和次生富集亚带交汇部位的北东侧.     

紫金山金铜矿的金矿体矿岩变化规律研究

紫金山金铜矿为金铜多金属矿床,矿体在空间分布上呈上金下铜的垂直分布,金矿产于600m以上的氧化带中,铜矿产于600m以下的原生带中。矿山经过生产进一步勘探,以及工艺技术不断进步,扩大生产规模,经济有效地利用低品位金矿资源。紫金山金矿已经成为我国采选规模最大、入选品位最低、矿石成本最少、基建投资最省的大型黄金企业,黄金全国单产第一。应用地质理论指导矿床勘查和评价,这是紫金山金矿资源利用取得重大突破的关键环节。矿石储量在实际生产中是保持动态的,随着生产能力的逐年增长,现场生产线的逐渐推进,矿岩界线以及矿岩储量基数也会适时变化。本文对金矿体矿岩变化规律作初步探讨,以飨读者。     

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。     

赞比亚ICHIMPE铜钴矿矿床特征及成因

赞比亚ICHIMPE铜钴矿是赞比亚—刚果(金)铜矿带上的一个典型铜钴矿床,矿体赋存于下罗安组含矿建造中。在总结前人研究成果的基础上,论述了矿床的地质背景、含矿建造特征及矿床地质特征,并初步探讨了矿床成因及成矿规律,以期对本区的进一步探矿及评价起到促进作用。     

福建紫金山铜金矿床铜矿体中As元素分布规律及其在配矿中的应用研究

通过光学显微镜、电子探针和手持式X射线荧光光谱分析仪(p-XRF)等方法对紫金山铜金矿床的铜矿体中As元素的赋存状态和分布特征进行了研究。结果表明,矿石中As元素主要赋存于含As的铜矿物,且与其他铜矿物共生,极少以单独相产出;少量As元素以类质同象赋存于蓝辉铜矿、铜蓝、黄铜矿和黄铁矿等矿物中;As元素在选矿过程中难以单独选别,造成铜精矿中As含量普遍超标。为了降低铜精矿中As元素含量,采用手持式X射线荧光光谱分析仪对钻孔副样进行分析,建立As/Cu比值的三维模型,划分矿石类型,进行科学配矿,有效减少浮选精矿中的As元素含量,提高经济效益。研究成果可为同类型矿山的配矿提供参考。     

紫金山铜金矿黄铁矿碎裂结构特征及其地质意义

紫金山铜金矿黄铁矿的碎裂结构具有三种赋存状态,主要运用电子探针(EPMA)对其进行微区分析,进而探讨碎裂结构黄铁矿的特征及其地质意义。通过研究得出以下主要结论:1)本矿碎裂结构黄铁矿的三种赋存状态:破碎程度一般,颗粒较大;破碎程度大,颗粒细小;碎裂结构与粒状结构黄铁矿共生。黄铁矿的破碎程度越大,颗粒越细小,含金性越大,且黄铁矿中金的赋存状态为纳米级颗粒金;2)碎裂结构黄铁矿是亏铁富硫型的,从浅部到深部,亏铁程度与富硫程度逐渐减弱,黄铁矿的Co-Ni图解,说明其是火山—热液成因,其形成与早期隐爆作用有关;3)碎裂结构黄铁矿的主要微量元素有Cu、Co、Ni、Pb、Zn、Au、Ag、As、Sb、Se、W、Sn等,从浅部到深部,碎裂结构黄铁矿的微量元素Sn含量明显增加;元素W、Au、Zn、Ag、Pb都有逐渐降低的趋势;Ni含量也逐渐降低,但是靠近铜矿体,其含量有所增加;越接近铜矿体,Cu与S的含量增加,而Fe的含量降低,体现了紫金山铜金矿床的成矿流体是火山热液(形成于燕山晚期,富含Cu、Au、Pb、Zn等成矿元素)与紫金山复式花岗岩岩体(形成于燕山早期,具有W、Sn、Mo、Bi等矿化特征)的叠加。     

紫金山铜金矿床深部Ⅺ号铜矿带矿石学特征系统研究

紫金山铜金矿床是我国东南沿海著名的高硫化型浅成低温热液矿床。通过对近几年紫金山铜金矿床深部发现的Ⅺ号铜矿带的铜矿石样品进行采样,利用显微镜观察、电子探针分析等方法,对铜矿石结构构造、矿物种类及矿物成分等进行了较深入和系统的研究。Ⅺ号铜矿带的主要金属矿物有黄铁矿、Cu-S体系矿物、硫砷铜矿,次要金属矿物有黄铜矿、斑铜矿、似黄锡矿、硫铋铜矿等,是一套高硫化型铜矿物组合,主要非金属矿物为石英、明矾石、地开石、绢云母。矿石结构以固溶体分离结构、交代残余结构、它形—自形粒状结构和包含结构为主。矿石构造主要为浸染状、脉状、网脉状、团块状和条带状构造,具典型的热液交代矿石特征。斜方蓝辉铜矿和久辉铜矿为形成温度低于63℃的矿物,因而推断Ⅺ号铜矿带属于紫金山高硫化低温热液型矿床的尾部,下部可能存在其他成因类型的矿床。     

四川九龙县江浪铜矿田矿床地质特征、控矿因素及找矿方向

江浪铜矿田位于扬子地台西缘江浪变质核杂岩穹隆构造中。至今已发现里伍、黑牛洞等中、小型铜矿床7处,为扬子地台西缘地区铜矿集中产出区之一。对江浪铜矿田矿床的地质特征、矿石矿物组成、控矿因素等的研究结果表明,江浪铜矿田的铜矿床受江浪变质核杂岩穹隆构造中的多层次韧性剪切滑脱带控制,铜矿化、矿体主要赋存在韧性剪切滑脱带中。该区成矿条件优越,具有形成大型、超大型铜矿床的条件,找矿潜力巨大。铜矿体主要呈脉状、透镜状和似层状,矿床为中高温热液型铜矿床。本文在详细研究矿床地质特征、控矿因素、成矿过程与矿床成因的基础上,提出了矿田和区域找矿方向,为本区找矿有新的突破提供了新的思路。     

河南栾川山湾金矿地质特征及找矿远景

河南栾川县山湾金矿矿体产于北北西向构造矿化带内,通过地表、坑道与钻探等探矿工程的控制,大致查明了矿体地质特征、含矿性及矿体的规模、形态、产状及赋存规律、矿石类型和结构、构造等特征,总结了金矿赋存特征及矿床成因,同时指出了本区的探矿方向,扩大向深部和外围空间的找矿,本区具有形成大型金矿的潜力。     

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

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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.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.