云南镇沅嘎里河铜矿地质特征及矿床成因浅析

嘎里河铜矿位于“三江特提斯”构造域澜沧江火山弧内,受区域构造的影响,变质作用、岩浆岩活动及构造运动较强烈,成矿条件优越,为嘎里河铜矿的形成提供了丰富的物质来源。矿床主要赋矿层位为三叠系上统小定西组第四段,含矿岩性为安山岩、安山玄武岩及蚀变安山岩,矿体呈层状、似层状及透镜状产出,在空间山受控于地层及NE向、NW向断裂构造,矿化与较强的褐铁矿化、硅化及方解石化等蚀变关系密切。本文对矿床的成矿地质特征及矿化规律进行总结,表明矿化沿水平方向变化较大而沿厚度方向上较稳定,验证了矿床同生成矿作用及后期热液改造作用的叠加,属与火山-岩浆侵入作用有关的中-低温热液型铜矿。     

江玛—赛登地区铜多金属矿点地质特征及找矿前景

藏北阿里江玛—赛登地区铜多金属矿点位于班公湖—怒江成矿带西段,通过开展矿产调查工作在该地区发现了赛登铜矿点、江玛铜金矿点、江玛南铜银矿点。为明确区内下一步找矿方向和工作重点,首先对区域成矿背景进行了系统分析;然后分别从矿体形态及产出、矿物组合、矿石结构构造、控矿因素、围岩蚀变等方面总结了矿床地质特征;最后分析了成矿机理,初步建立了矿床模型,总结了区内地层、岩体、构造、蚀变等找矿标志,并对区内找矿前景进行了探讨。研究结果表明:1去申拉组地层对区内铜多金属矿化的控制作用十分明显,其中蚀变安山岩与成矿关系密切;2赛登铜矿化体主要产出于NW—SE向顺层产出的蚀变破碎带内,江玛南铜银矿化体受火山机构控制明显;3江玛铜金矿化、金矿化主要产出于蚀变安山岩和蚀变石英闪长玢岩中;4矿区剥蚀程度较小,矿床保存尚好,寻找斑岩型-浅成低温热液型矿床前景良好,下一步工作重点是被地表安山岩覆盖的深部含矿隐爆角砾岩筒及含矿玢岩体。     

栾川县大清沟铁铜矿床地质特征及成矿模式探讨

大清沟铁铜矿位于华北地台南缘,基底为太古界太华群变质岩系,盖层为中元古界熊耳群安山岩、官道口群碳酸盐岩,区内北西西向构造发育,岩浆活动比较频繁;矿体多呈脉状、似层状、透镜状分布,矿体严格受北西西向断裂或片理化带的控制。初步建立矿床的成矿模式:原生沉积的铁质形成了太华群片麻岩含铁建造基底,局部富集成矿形成原生沉积变质铁矿床;古远古晚期岩浆热液交代,在片理化带内富集形成含铁建造—热液改造型铁矿床;中生代花岗质岩浆沿断裂上侵进入火山岩盖层形成火山沉积含铁建造—热液改造型铁矿,在绢云石英片岩带附近形成闪长岩脉的同时形成热液脉状铜矿床。     

文成县大垟培铜矿地质特征及矿床成因分析

文成大垟培铜矿处于文成火山洼地与山门火山洼地之间,北西向和北东向断裂构造发育,为成矿热液的形成运移和矿液的沉淀提供了通道和场所。矿体受深部隐伏岩体携带热量在天水作用下,以构造为通道,形成绿泥石化、绢云母化、黄铁矿化、硅化等的蚀变组合和黄铜矿化和闪锌矿化,局部矿化富集时形成了锌铜矿体。根据区域成矿规律、控矿地质条件,认为矿区深部存在与隐伏岩体有关铜矿床,具有较好的找矿前景。     

新平浑龙河铁矿成因机制及找矿标志

浑龙河铁矿是挟持于红河断裂与绿汁江断裂之间的典型“大红山式”矿床之一，被视为多岩浆旋回作用下的铁、铜矿床。为进一步查明矿床成因机制，结合区域成矿背景，以云南省新平浑龙河铁矿地质勘查成果为依据，深入剖析矿床地质特征、矿物组构特征、围岩蚀变特征，并对成矿物质基础和控矿构造特征进行总结，结果表明：①铜—铁矿带严格受地层层位及沉积旋回控制，属火山喷发沉积变质成因，铁矿带则受火山岩浆热液改造作用，属火山沉积—改造成因；②构造、变质作用及岩性岩相不同程度控制着矿化沉淀、富集，基性凝灰质片岩、钠质沉凝灰岩为成矿提供丰硕物源，后期热液沿断层上涌、运移，并于有利部位改造、富化早期形成的沉积矿（化）体；③综合岩性组合、蚀变作用特征及构造特征认为，曼岗河组地层、富钠质熔岩与辉绿辉长岩及岩浆岩发育地段成矿潜力较好，是下一步矿区深、边部地质勘查工作的重点部位。     

老挝巴乌县怀亮金矿地质地球化学特征及找矿预测

老挝巴乌县怀亮金矿区地处云南三江成矿带的南延地段,属于热液型铅锌矿、火山沉积型铜矿、斑岩型-岩浆热液型铜金矿和沉积型钾盐矿床的重要成矿带。为查明矿区铜金多金属矿的资源潜力,结合地 质、遥感、物化探及探矿施工等工作成果,探讨了怀亮金矿形成的地质背景、矿区地质特征、矿床地质及地球化学特征、成矿模式等,并圈定了3处找矿靶区,即西部找矿靶区（Ⅰ）、东部找矿靶区（Ⅱ）和南部找矿 靶区（Ⅲ）。西部找矿靶区（Ⅰ）面积约13.63 km2,发育两条断裂构造,圈定了HT1、HT2、HT4、HT5、HT6号化探综合异常,发现了怀磊沟金矿点,探槽、剥土揭露了7条金矿化体,矿化主要赋存于蚀变绢云千枚岩、 闪长岩、灰岩等浅变质岩与岩体接触边部,预测靶区金矿找矿潜力较大。东部找矿靶区（Ⅱ）面积约5.18 km2,圈定了HT3号化探综合异常,在石英破碎带中发现了2条铜矿化脉,围岩为安山岩,预测靶区具有一定的 金（铜）矿找矿潜力。南部找矿靶区（Ⅲ）面积约1.88 km2,见一条NE—SE向断裂从区内西侧经过,发现了怀卡金矿点,探槽、剥土揭露了2条金矿化体（带）,矿化主要赋存于蚀变安山岩中,预测靶区具有较好的金 矿找矿前景。推断矿区矿体的形成可能与地层岩性、岩体或断裂构造有关,矿床类型为构造蚀变—中低温热液型矿床。在上述分析的基础上,从地球化学、构造、围岩蚀变、矿物组合等角度总结了找矿标志,以期为 三江成矿带金矿找矿起到一定的启示作用。     

浙东山门地区铜矿床地质特征及找矿预测

为了解浙东山门地区铜矿床的分布规律及地质特征,并对该地区铜矿床进行找矿预测,首先系统分析了区内地质、物化遥特征,然后对产出于该地区的半岭—黄施岙一带铜矿床(山门铜矿床)的产出状态、地质特征、矿化类型、围岩蚀变、控矿因素进行了详细讨论,结果表明:1区内铜矿床成矿的同时具有浅成热液和斑岩成矿系列的某些特点,简单地以构造热液充填或典型的斑岩成矿理论指导找矿是不合理的,应以与次火山岩有关的浅成热液型铜多金属矿作为主攻对象;2矿区所见矿化大多属高位或远端的矿化,其延深部位是现阶段找矿的主要目标,而斑岩成矿则可能在更深处。在上述分析的基础上,提出了矿区"五位一体"的找矿模式,即针对NW向断裂裂隙带、次级火山机构、多期次的潜火山-侵入岩、蚀变分带特征和物化探异常等5种不同的矿化类型提出了具体的找矿思路,为区内矿产勘查工作提供参考。     

福建武平龙江亭铜矿床地质特征及找矿方向

通过对龙江亭铜矿床的成矿地质背景、矿床地质特征、矿床成因等相关研究,探讨了成矿期次阶段、成矿物质来源及成矿规律,认为该铜矿床为浅成中(低)温火山—次火山热液型矿床,其成矿作用与燕山晚期火山活动有关,具有典型的浅成中(低)温热液蚀变矿化特征,指出矿床找矿标志,预测找矿远景区。     

浙江省青田县高湖镇半寮矿区萤石矿矿床特征及找矿标志

浙江省青田县高湖镇半寮矿区萤石矿区位于青田县城北西方向,面积2.84km2。通过本次地质详查工作,基本查明了矿区受岩浆活动、火山构造和断裂构造复合作用控制成矿,分析了矿区地层、构造、岩浆岩、围岩蚀变的分布特征及其对成矿的控制作用以及萤石矿化构造蚀变带、矿石质量、矿物成分等矿床特征。根据矿区良好的控矿地质条件,总结出矿床成因及其类型属于次火山热液充填脉型矿床,4条找矿标志的总结对矿产的发现具有重大意义。     

滇西普朗矿区北矿段及外围成矿条件及找矿标志

普朗铜矿是滇西格咱岛弧著名的超大型斑岩型矿床,地处印支期义敦岛弧—中甸岛弧南缘、德格—中甸陆块东缘,总体属著名的"三江成矿带"南段。在全面分析区域地质工作成果的基础上,对区域成矿地质背景、矿区及矿床地质特征、成矿条件进行了详细分析,并总结了找矿标志。研究表明:(1)北部矿段及外围大量出露三叠系上统图姆沟组二段第二层地层,岩性以板岩、砂岩及安山岩为主,断裂构造发育;(2)受区域构造、岩浆活动的影响,北部矿段及外围岩浆岩发育,由石英二长斑岩、石英闪长玢岩及花岗闪长斑岩构成;(3)矿段内发育斑岩型铜矿体及热液脉状铅锌银多金属矿化(体),分别赋存于Ⅱ#岩体石英脉(石英二长斑岩、石英闪长玢岩)和图姆沟组构造裂隙及围岩触带内;(4)矿化(体)主要受控于岩浆岩、热液蚀变及构造"三位一体"的成岩—成矿系统;(5)矿段岩浆岩、断裂构造、围岩蚀变及物化探异常为有利的找矿标志。     

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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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.