胶东大磨曲家金矿床矿石及金矿物特征

大磨曲家金矿床为破碎带含金蚀变岩型金矿床,其矿石主要为黄铁绢英岩、黄铁绢英岩化碎裂岩、多金属矿化矿石及少量含金石英脉。矿床主要经历热液和表生2个成矿期及5个成矿阶段。主要载金矿物为黄铁矿。金矿物为自然金和银金矿,金的赋存状态为包裹体金、晶隙金、裂隙金,以裂隙金和晶隙金为主,二者占79％;金矿物粒度以中细粒为主,占69％。     

马达加斯加金矿床成因及找矿标志研究

马达加斯加金矿床类型为石英脉型,金矿化包括含金石英脉及其两侧的矿化围岩,金矿体产在NNW向剪切带和EW向断层交会处。金成矿作用主要与泛非造山运动有关。在泛非造山期,马达加斯加发生了强烈的构造岩浆活动,地壳深部含金硅铝质岩发生部分熔融形成花岗质岩浆。花岗质岩浆从岩石中萃取成矿组分,形成含矿热液流体。沿断裂上升的热液流体与地下含矿热水混合,构成岩浆水与大气降水的混合成矿流体,这些成矿流体进入构造有利空间,充填和交代围岩,形成含金石英脉。     

江西朱林西金矿床流体包裹体特征及成矿流体来源研究

朱林西金矿床是金山金矿田内第四大金矿床。该矿床成矿阶段分为4个阶段,硫化物-铁镁碳酸盐阶段为主成矿阶段。流体包裹体岩相学研究表明,含金石英脉中含有气液二相水溶液包裹体(Ⅰ型)和纯液相包裹体(Ⅱ型)2种类型。测温研究表明,成矿流体温度约为204℃~328℃,盐度为2.63%~9.97%,pH值为5.84,Eh值为0.17 V,反映矿床形成于中温、弱酸性、氧化环境。氢、氧同位素研究表明,成矿流体δD为-79.3‰~-61.9‰,δ~(18)O_(H_2O)为-0.2‰~1.0‰,成矿流体属于岩浆水和大气降水混合的产物。岩浆水与大气降水的混合促进了金的再次富集与沉淀成矿。     

新疆尉犁县胜利大道北金矿床地质特征及找矿标志

新疆尉犁县胜利大道北金矿床位于塔里木陆块之库鲁克塔格陆缘地块内。古远古代吕梁运动,区内发育大面积岩浆弧花岗岩,该酸性侵入岩携带含矿热液形成初始矿源层,晚志留-早泥盆世的区域构造、岩浆活动对初始矿化进行了叠加改造,形成了区内构造破碎带蚀变岩型金矿。矿体主要分布于断裂及断裂交汇部位的构造破碎蚀变带中。矿石自然类型主要为含金蚀变岩矿石及含金石英脉矿石。矿床工业类型为破碎带蚀变岩型金矿。矿石矿物为金,脉石矿物主要有石英、斜长石、钾长石、白云母、绢云母、萤石。岩石碎裂岩化、硅化、褐铁矿化、绢云母化是矿区最主要的蚀变类型,其中与金成矿关系密切的蚀变为碎裂岩化、绢英岩化、褐铁矿化。经研究该金矿床地质特征,认为区域侵入岩标志、矿床蚀变特征、构造及化探异常标志等可以作为矿区及区域找矿标志。     

黔东平秋金矿H-O同位素及流体包裹体对成矿流体指示意义

通过对黔东平秋金矿含金石英脉流体包裹体特征及氢氧同位素组成进行分析研究,探讨成矿流体性质及来源。研究区内石英中流体包裹体主要有含CO₂气液两相和CO₂三相包裹体,测试显示为中低温（159.5～351.8 ℃）、低盐度（质量分数为0.53%～16.71%）、低密度（0.58～0.98 g/cm³）流体。液相成分中的Na+/K+比值多＜1,显示该矿床成矿流体具有岩浆热液性质。氢氧同位素组成：δD■为-49‰～-60‰,δ18O■为7.30‰～9.00‰,在δD-δ18O图解上投点落在原始岩浆水与变质水重叠的范围。经综合分析认为该金矿的成矿流体可能主要为岩浆水混合了大量区域变质水的溶液。来自深部的含金成矿流体沿着剪切带等容矿构造上升,在剪切带及由背斜和剪切作用形成的层间裂隙中沉淀,形成了透镜状和层状石英脉金矿床。     

内蒙古达茂旗哈力齐金矿床地质和流体包裹体特征及成因类型

通过近3年的多金属普查工作,在内蒙古达茂旗哈力齐地区发现了一个石英脉型金矿床。金矿床产于下泥盆统查干合布组浅变质岩中,受乌德岩浆构造混杂带北侧断层控制,矿化类型有石英脉型和糜棱状蚀变岩型两类。矿石的组成矿物主要有石英、绢云母、黄铁矿、褐铁矿、赤铁矿、毒砂、自然金等。矿石构造主要为脉状构造,偶见晶洞构造;矿石结构为交代反应边结构、交代港湾状结构、褐铁矿残留结构及环带结构等。围岩蚀变则以硅化、绢云母化及黏土化为主。流体成矿过程包括：石英-黄铁矿早阶段、石英-黄铁矿-毒砂-自然金主成矿阶段和碳酸盐-石英细脉晚阶段。流体包裹体研究表明,成矿主期发育水溶液包裹体和纯CO2包裹体,流体密度约0.85～0.9 g/cm3,估算其捕获温度为190～370℃,捕获压力约为61～183 MPa,成矿深度约6.1～6.9 km。研究表明,哈力齐金矿床为低密度低盐度的中—低温热液型矿床,具有造山型金矿床的特征。     

内蒙古哈达门沟金矿床成因及控矿规律探讨

哈达门沟金矿床地处华北克拉通北缘阴山隆起带南缘乌拉山复背斜南翼,金矿体主要产于新太古界乌拉山群变质岩中,主要矿石类型包括含金石英脉、含金石英一钾长石脉、含金钾化蚀变岩等。成矿流体主要为中低温（160—300℃）、中低盐度（5％-15％）,气相成分以H2O和CO2为主,液相组分阴离子以Cl^-和SO2^-为主,阳离子以Na^＋、K^＋和Ca^2＋为主。矿石6Ms变化于-21．7‰～5．4‰,极差为27．1‰,说明成矿物质来源的复杂性,平均值为-10．6‰,表现出亏损重硫的特点,硫继承了太古代地层中硫的同位素特点,并混有深部含矿流体的硫。矿石铅同位素组成、单阶段模式年龄、Th／U比值、肛值变化范围较大,表现出多源特点,在铅构造模式图上,投点比较分散,表明哈达门沟矿石铅来源的复杂性。氢一氧同位素表明,成矿流体来源于岩浆水和部分变质热液,后期有天水的混入。矿石辉钼矿Re-Os同位素加权平均年龄为（386．4±2．7）Ma,等时线年龄为（386．6±6．1）Ma,金矿床主要成矿时代为早泥盆世,后期有多期热液活动叠加。矿床形成于弧一陆碰撞后的伸展构造背景。金矿脉严格受构造控制,具有等距分布,矿体在平面上和垂向上分段富集、分支复合、舒缓波状以及侧伏等现象,矿化表现为上金下钼、成矿多期多阶段等规律特点。     

甘肃岷县马坞金矿地质特征与构造控矿模式

马坞金矿床的地质特征与中川岩体地区金矿床的特征具有相似性。马坞金矿主成矿期石英脉中δD为-78‰～-98％0,δ^18OSMOW为18．0‰～20．2‰,δ^18OH2O为0．45‰—8．54‰,显示成矿流体为岩浆水、变质水和大气降水的混合水,以岩浆水和变质水为主,有少量大气降水参与;主成矿期石英脉中δ^34S为＋7．1‰～＋7．9‰,平均＋7．65‰,δ^34S变化范围较小,均一性强,显示地层硫特征,成矿物质来源于舒家坝组。F1区域性深大断裂和马坞背斜共同控制了马坞金矿的产出,F1为导矿构造,马坞背斜中层间破碎带及张性裂隙和F1派生的次级构造体系为容矿构造。马坞金矿构造控矿模式的建立对下一步的找矿工作与探矿方向具有非常重要的指导意义。     

建平烧锅营子金矿区矿化地质特征及找矿标志

着重从含金矿化类型，含金矿脉（矿体）规模、产状，矿石物质组成，矿物组合、生成顺序及成矿期次和金的品位变化规律等，对烧锅营子金矿区矿床矿化地质特征，作了较全面系统的阐述；提出了含金矿脉可划分为石英脉型、蚀变岩型、复合脉型和复脉带型等四种矿化类型；并通过对矿区成矿控制因素和矿床地质特征分析，总结出金矿带由矿区→矿床→含金矿脉→矿体→矿化富集地段的埃次找矿标志．     

江南造山带黄金洞金矿蚀变岩型金矿化形成机制研究

蚀变岩型矿石是热液型金矿床中重要的矿石类型,其形成与水岩反应密切相关。江南造山带黄金洞金矿中的蚀变岩型矿石多发育在褪色化蚀变带中,目前其形成机制尚不清楚。野外勘查、岩相学观察和TIMA分析表明,蚀变带中最主要的特征是广泛发育菱铁矿、绢云母和隐晶质石英。蚀变岩型矿石局部可见较多硫化物,与含金石英脉中的硫化物具有相似的化学成分,说明为同一期流体作用的产物。部分硫化物切穿碳酸盐矿物,说明褪色化蚀变形成于成矿前。TIMA和μ-XRF分析表明,蚀变带发生硅化和绢云母化,且Fe聚集成点状。因此,推测成矿前的水岩反应形成大量菱铁矿斑点,为成矿提供良好的化学圈闭。成矿期含金流体与菱铁矿发生化学反应,通过硫化作用促进金的沉淀,为黄金洞金矿蚀变岩型矿石的成矿机制。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.