太行山石湖金矿成矿流体成分特征与演化过程

成矿流体的研究是矿床成因研究的一个非常重要的方面。本文通过石湖金矿流体包裹体的激光拉曼分析和包裹体群体分析,气相成分中发现了大量的含CO2 包裹体,可能产生碳-水反应使其在主成矿期成矿;液相成分显示了成矿流体为以岩浆热液为主同时含有大气降水的混合流体,成矿过程主体为还原环境,后期也有O2的参与使环境转换为半封闭环境甚至是开放环境,而金在成矿流体中主要以硫氢络合物的形式迁移,氯络合物次之。     

云南都龙锡锌多金属矿床成矿流体特征及矿床成因

云南都龙锡锌多金属超大型矿床是我国重要的锡矿资源基地，伴生铅、银、铜、铁、铟和镉等组分。针对该矿床的成矿作用与成因机制问题，以矿床脉石矿物为研究对象，开展了流体包裹体的离子色谱和气相色谱分析，查明了石英、方解石、萤石中流体包裹体的气相和液相成分。结果表明，石英流体包裹体气相成分以CO2和H2O为主，其次为N2，方解石流体包裹体气相成分以CO2、H2O和N2为主，含有少量H2；流体包裹体液相成分相对富Na+、Ca2+、Cl-，F-含量相对较少。流体中的氮气可能来源于有机质和花岗岩中含钾硅酸盐矿物的分解，CO2等气相成分可能参与成矿作用；成矿流体为富 Cl-、贫F-的弱酸性、还原性溶液，可与金属矿物阳离子结合形成络合物，有助于金属的迁移；矿床形成可能主要经历了两个阶段，早中期阶段的水-岩反应，中晚期阶段的天水混入和矿物沉淀，成矿晚期矿床受岩浆热液叠加改造。     

西藏波龙铜矿区成矿流体来源示踪

波龙铜矿床是西藏地质五队近年来在青藏高原中部发现的最大的斑岩型矿床。为了查明波龙铜矿区成矿流体来源,对采自矿区的黄铁矿及石英流体包裹体样品进行了He、Ar同位素与气相成分测试。测试结果显示黄铁矿流体包裹体3 He/4 He分别为3.03和8.51,40 Ar/36 Ar为214.94和284.23,表明成矿流体可能来源于壳幔混源;石英包裹体气相成分以H2O为主,次为CO2,还有少量的N2、CH4、C2H6、H2S及Ar气体,部分样品中还含有O2成分,表明成矿流体中混有高氧逸度组分;结合矿区石英包裹体H-O同位素显示成矿流体以岩浆源为主、并混有大气成分分析,波龙铜矿区成矿流体应属壳幔混源,早期成矿流体以深源为主,晚期随着流体的演化有部分大气降水的加入。具高氧逸度特征的怒江洋壳俯冲板片携带大量成矿物质俯冲进入羌塘-三江复合板片南缘深部,熔融交代上覆地幔楔,发生壳幔混合,形成初始岩浆,在上升过程中混染下地壳物质,并受到深循环大气降水的影响最终侵位到上部地壳形成波龙铜矿床。     

四川拉拉铜矿流体包裹体拉曼光谱特征及其地质意义

本文通过对拉拉铜矿流体包裹体拉曼光谱分析，发现拉拉铜矿流体包裹体类型具有多样性，既有单相纯气相或纯液相、富气相、富液相、含子晶多相包裹体存在，也有流体-熔体包裹体存在。流体包裹体气相成分中，不限于以往发现的以CO₂为主的包裹体成分，也有以N₂、CH₄或者三者混合为主。流体包裹体子矿物中不仅限于卤化物子晶，还发现了方解石及赤铁矿子晶。总之，拉拉铜矿流体包裹体拉曼光谱特征显示拉拉铜矿成矿流体具有多期次、来源复杂的特点。     

多不杂铜矿床包裹体气液相成分分析

对多不杂铜矿床矿物包裹体进行气液相成分分析,研究表明：包裹体气相成分以H₂O和CO₂为主,代表了一种氧化环境;液相成分主要为Cl^-和Na⁺,流体中含有大量的石盐子晶,说明其具有高盐度的特点;热液期各阶段流体呈弱酸性,随着成矿过程的进行,氧逸度、二氧化碳逸度和硫逸度在逐步降低,pH值和Eh值在逐步升高;成矿作用主要发生在高温、高盐度、浅成、弱酸性以及氧化环境中。     

云南博卡金矿床流体包裹体特征及其意义

云南博卡金矿床位于川滇黔成矿带,矿体受到脆-韧性剪切带的次级断裂控制,根据矿物组合及不同矿物组合矿脉的穿切关系,可将成矿过程分为石英-绢云母-黄铁矿阶段(Ⅰ)、石英-黄铁矿阶段(Ⅱ)、石英-多金属硫化物阶段(Ⅲ)。通过分析该矿床流体包裹体的岩相学特征,发现博卡金矿床流体包裹体以气液相为主,包裹体显微测温数据表明包裹体的均一温度为112~201℃,包裹体盐度为2.24%~7.17%,密度为0.83~0.98 g/cm3。包裹体激光拉曼分析与群体包裹体分析显示,包裹体气相成分主要为CO_2、H_2O,少量CH_4等烃类。研究表明:博卡金矿床的成矿流体具有富含CO_2、低盐度、低密度、低温度的特征,该矿成矿流体为一种混合流体,为变质热液与大气降水的混合热液。     

河南栗子沟金矿流体包裹体及同位素地球化学研究

通过对河南嵩县栗子沟构造蚀变岩型金矿矿石中石英包裹体类型,包裹体气、液相成分分析,表明其成矿流体富为含H2O、C2O和CH4及C2H2等挥发分的Na+-K+-Ca2+-SO42--NO-3-Cl-体系;对包裹体氢氧同位素分析,则显示其成矿流体为岩浆热液与地层水的混合源.综合认为栗子沟金矿的成矿可分为三个阶段,成矿与中低温热液有关.     

云南九顶山斑岩铜钼矿流体包裹体特征及地质意义

对云南九顶山斑岩铜钼矿含矿石英脉中的石英流体包裹体分析表明,九顶山铜钼矿成矿流体属于Na Cl-H2O型,均一温度集中在260~320℃,盐度集中在6.50%~10.60%,成矿流体为中低温、中等盐度性质。流体包裹体压力及深度分析显示,成矿流体主要在浅成低压环境下形成,流体演化过程中压力逐渐释放,深度逐渐降低。     

甘肃文县阳山金矿床成矿流体特征

甘肃文县的阳山金矿床是武警黄金部队近年来在陕甘川交界地带发现的一个产于泥盆系浅变质岩系的特大型金矿床,勘查后求得储量已达227 t之巨。流体包裹体的系统分析结果表明:①镜下石英和方解石中流体包裹体类型丰富多样。据室温状态下流体包裹体的相态、加热状态下流体包裹体的性状及产出特征,鉴别出两种成因类型及九种物理状态类型;②流体包裹体显微测温结果显示本区的均一温度在105~310℃之间,主要集中在260~310℃、220~240℃、150~190℃等三个区间,成矿流体组份体系接近于NaC l-H2O-CO2体系,成矿流体密度估计在0.35~10.2 g/cm3之间,成矿压力估计在400×105Pa~800×105Pa之间,流体包裹体盐度ω(NaC l)估计在2.5%~10.4%之间;③从流体包裹体成分分析获得的pH值在6.91~7.1之间,还原参数CH4 CO H2/CO2的摩尔数比值在0.009~0.050之间,具有浅成中偏碱性和弱还原环境成矿特点;④石英中流体包裹体的δD(-SMOW)值在-92.4‰~-62.9‰之间,1δ8O石英(-SMOW)值在-3.09‰~ 0.41‰之间,1δ8OH2O(-SMOW)值在-12.13‰~-8.48‰之间。综合分析认为该矿床成矿流体性质复杂,具有多源特征,成矿可能主要与中低温热液作用有关。     

随县岩子河铅锌矿流体包裹体特征及其地质意义

随县岩子河铅锌矿赋存于桐柏杂岩的片麻状花岗岩中,成矿过程经历了5个阶段;流体包裹体主要有气液相包裹体、含有子矿物多相包裹体、含CO_2三相包裹体、纯气相包裹体和纯液相包裹体5类;包裹体的演化分为5个阶段,从早阶段到晚阶段,温度—盐度逐步降低,1-3阶段主要为气液相包裹体、含有子矿物多相包裹体,为CO_2-H_2O-NaCl±CaCl_2体系,4-5阶段主要为气液相包裹体,为H_2O-NaCl体系;成矿流体来源于岩浆流体,晚期混有大气降水,流体沸腾是成矿的重要因素,大气降水的渗入是成矿的另一重要因素,成矿作用主要与2-3阶段流体沸腾和4阶段大气降水的渗入相关联,与大陆碰撞体制的浆控高温热液矿床特征一致,具斑岩型矿床的特征。     

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.     

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.     

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     

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     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

铜熔炼中锍品位对杂质元素分配行为的影响

借助于多相、多成分系统中平衡计算的手段，开发出微量元素砷、锑、铋及伴生元素铅、锌等在铜熔炼中分配行为的计算机模型。利用该模型对铜熔炼过程进行计算机模拟，分析了冰铜品位对砷、锑、铋、铅和锌等杂质元素的分压、活度系数及它们在冰铜、炉渣和气相中分配率的影响，并讨论其热力学分析结果对生产实践的指导意义。     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,