灵寿县北营西沟银铅锌多金属矿区银的赋存状态

北营西沟银铅锌多金属矿床中银，主要以硫化物形式存在，主要有银锑黝铜矿、硫铜银矿、辉银矿等，自然银很少。银矿物呈它形粒状同脉石矿物及其它金属矿物镶嵌在一起或呈显微、超显微及胶状包嵌在方铅矿、闪锌矿和黄铜矿等矿物中，其中与方铅矿的关系更为密切。本文通过研究银的赋存状态，为选矿方法实验提供依据。     

东天山维权银铜矿床中钴矿化发现及成因意义

新疆东天山地区是中国重要的钴成矿带之一,在多个与基性-超基性岩有关的铜镍硫化物矿床和磁海铁矿床中伴生有中小型钴矿资源。最近,笔者在研究东天山维权矽卡岩型银铜矿床物质组分的过程中,通过显微镜观察、电子探针扫描和成分分析发现了独立钴矿物辉砷钴矿,不仅代表了东天山含钴矿床的新类型,而且具有综合利用的前景。文章对维权矿床中铜银钴矿石类型、矿石中辉砷钴矿和其他主要金属矿物的赋存状态进行了研究,划分出铜矿石、铁铜矿石、含银铜钴矿石、银矿石、含钴铁铜矿石和铅银铜矿石6种矿石类型,认为它们可能是铁铜、钴、银3期成矿作用叠加的产物,钴成矿作用为独立的一期中高温热液成矿作用,含钴铁铜矿石是钴成矿作用叠加在铁铜成矿作用之上形成,而含银钴铜矿石是银成矿作用叠加在钴成矿作用之上形成。     

皖西南安庆月山铜(钼)矿床中金的赋存状态研究

应用光学显微镜、化学分析、电子探针和质子探针(PIXE)等多种分析研究方法,系统地研究了安庆月山铜(钼)矿区铜牛井矿床不同类型的铜矿石中金的赋存状态。研究结果表明,矿石中金呈显微自然金存在,它们分别是含银自然金、银金矿和纯金存在于石英脉型铜矿石、含铜方解石脉以及闪长岩型铜矿石中;主要载金矿物是黄铜矿、黄铁矿等矿物。研究结果为该矿区矿石中伴生金的综合利用提供了科学依据,同时也为同类矿床中金的赋存状态研究提供了新的方法。     

银的赋存特征研究

银的赋存特征研究表明，银主要以伴，共生形式存在于有色金属矿床中，银主要呈独立矿物产业，少量呈离子吸附银，类质同象银或非晶态银产生；银矿物的粒度与嵌布特征与矿床成因有密切关系，铅，锌，铜的硫化物是银的主要载体矿物，银在矿石中的分配银矿化强度，银矿物粒度，嵌布特征和矿化组织类型的制约。     

广东梅县玉水铜多金属矿田矿床矿物学特征

着重研究梅县玉水铜多金属矿体中矿石的产出特征,黄铜矿、斑铜矿、辉铜矿、锌黔铜矿、锌砷黔铜矿、硫铜银矿、新发现的矿物硫铜铜矿等矿石矿物的矿物学特征和银的赋存状态。     

西藏甲玛铜多金属矿富银矿体地质特征、银赋存状态及富集机理研究

位于西藏墨竹工卡县的甲玛铜多金属矿床是冈底斯中东段近年来新发现的超大型矿床,已探明伴生银资源量大于6000t.根据产出特征可将甲玛矿区的银矿体分为矽卡型与大理岩型两种.通过矿相学、电子显微探针研究发现银均以不可见银和可见银两种形式存在.不可见银以晶格银的形式赋存于铜矿物中;其次以次显微包体银的形式赋存于方铅矿中.可见银...     

云南官房铜矿床矿石矿物特征及银的赋存状态

通过显微镜鉴定、电子探针(EPMA)及扫描电镜能谱分析(SEM/EDS)等方法,首次对官房铜矿的矿物组合和银的赋存状态进行了研究。初步查明,矿石矿物为中-低温热液成因,并受火山机构及断裂构造的控制;银矿物主要为碲银矿和辉银矿。矿石中银与铜呈明显正相关关系,而方铅矿中不含银。银主要以类质同象的形式赋存于含铜矿物或黄铁矿中;银的独立矿物含量低,且多呈包裹体的形式存在于黄铜矿、斑铜矿及黄铁矿中,或以微细粒状赋存于矿物颗粒间和斑铜矿的表面。     

喀勒隆多金属矿银矿物特征及利用方向

四川省甘孜州喀勒隆银铅锌矿床,有工业价值的矿脉多达11条,共伴生元素多。通过电子探针、化学分析、显微镜鉴定及野外观察等方法,对银矿物物理性质、化学成分及银的赋存状态进行了研究。初步查明含银矿物主要有银黝铜矿、锑银矿、深红银矿、辉银锑铅矿。银主要存在于方铅矿、银黝铜矿中。了解其特征,为银矿物的利用提供了指导依据。     

某砂岩铜矿中的银、硒矿物

砂岩铜矿是铜的重要工业矿床类型之一.矿石中除铜外,尚含有可供综合利用的多种组分.去年,我们对我国西南某地砂、砾岩铜矿中银的赋存状态进行了考查.初步工作表明:砾岩铜矿中,银大部分呈分散状态分布于含铜矿物     

梭梭井银铅矿床银的赋存状态及其与回收率的关系

该矿床中银品位可达数千g/t.工业矿物为方铅矿、黄铜矿、银黝铜矿、螺状硫银矿—辉银矿、硫铜银矿等.本文在研究银的赋存状态、粒度和分布特征的基础上,探讨了银回收的有效途径.     

银矿与萤石的时空关系

银矿床，特别是大型-超大型银矿床多分布于萤石矿密集区，一些银成矿带与萤石成矿带基本一致。银矿中一般共生或伴生萤石化，萤石矿中多含有很高的Ag，甚至形成银-萤石矿床。银矿化的时代通常与萤石矿化时代相似或接近，说明一些银矿床与萤石有着密切的时空关系和成因联系。因而萤石可以成为寻找银矿的重要标志之一。     

冲绳海槽中部Jade热液区热液沉积物中Ag的富集成矿作用

冲绳海槽Jade热液活动区热液沉积物主要以块状硫化物和硫酸盐矿物为主。与其它热液活动区相比,本区的热液沉积物以富含Pb和Ag等元素为特征。电子探针和中子活化的分析结果表明,在块状硫化物矿石中,Ag主要以分散态富集在粗粒硫化物和细粒硫化物集合体中,在热液活动的早期和晚期均有Ag的富集。在以硬石膏为主的块状矿石中,Ag主要在细粒硫化物集合体中富集,其富集成矿的时间为热液活动的中后期,富集成矿温度在150℃以上。在重晶石为主的块状矿石中,Ag主要以颗粒状自然银的形式在热液活动后期富集成矿,其成矿温度低于160℃。     

四平山门银矿矿床成因的同位素地球化学证据

文章运用同位素地球化学方法对四平山门银矿成矿作用与区域岩浆活动的关系进行了探讨.对矿石矿物、含矿岩体、矿区地层的铅、硫、氢、氧同位素进行了测定,矿石的Pb-Pb等时线年龄173Ma,与矿区内花岗闪长岩体形成时代的末期接近;矿石矿物、含矿岩体及矿区地层中铅同位素组成对比表明,铅同位素主要与矿区内花岗闪长岩有密切关系.同时硫、氢、氧研究为山门银矿的矿床成因模式提供了准确的同位素证据.     

The Milluachaqui epithermal silver district of northern Peru

The mines in the Milluachaqui district, located near Salpo in the northern part of Peru, show a vertically zoned, epithermal silver-gold mineralization. Colonial production was obtained from oxidized, high-grade ores, consisting mostly of native silver and cerargyrite. More modern development exposed, from the top of ore shoots to their base, the "bonanza" ores (the pyrargyrite-polybasite-acanthite zone), silver-copper ores (the tetrahedrite zone), silver-lead ores (the galena-sphalerite zone), and the basal zone ores (the sphalerite zone). The ratio of gold to silver in the "bonanza" ores was about 1 to 100, by weight. Interpretation of mineralogical textures and the composition of minerals in the sulfide zone suggests that supergene movement and enrichment of silver at Milluachaqui was not a significant factor. Silver tended to be fixed in place during weathering as the chloride and native mineral. The "bonanza" ores are interpreted to be hypogene sulfide accumulations. These findings contrast to hypotheses proposed for some epithermal districts in the U.S. which assume supergene activity to have been significant in the accumulation of high grade, near-surface silver ores.     

黄沙坪铅锌矿床中银矿化组合特征

研究黄沙坪铅锌矿床中银矿化组合表明：与３０１花岗斑岩和３０４花斑岩岩体有关铅（锌）－银－锡－锑矿化组合，银矿化伴随铅矿化出现，其微量元素富Ｓｎ、Ｓｂ、Ａｇ，低Ｂｉ、Ｔｅ、Ｍｏ、Ｗｏ、Ｗ为特征；银矿物组合以硫银锡矿－银黄锡矿－深红银矿－螺状硫银矿－硫锑铜银矿组合为特征，与石英斑岩有关的铜（钼）－银－碲矿化组合，铜矿石以高Ｔｅ、Ｂｉ、Ｍｏ和Ｗ，低Ｓｂ为特征，银矿物组合以碲银矿－六方碲银矿－粒碲银组合和硫银铋矿－块辉铋铅银矿－碲银矿组合为特征     

Mineral and geochemical compositions,regularities of distribution,and specific formation of ore mineralization of the Rogovik gold-silver deposit (northeastern Russia)

New data on the mineral composition and the first data on the geochemical composition of ores of the Rogovik gold-silver deposit (Omsukchan ore district, northeastern Russia) have been obtained. Study of the regularities of the spatial distribution of ore mineralization shows that the deposit ores formed in two stages. Epithermal Au-Ag ores of typical poor mineral and elemental compositions were generated at the early volcanic stage. The major minerals are low-fineness native gold, electrum, acanthite, silver sulfosalts, kustelite, and pyrite. The typomorphic elemental composition of ores is as follows: Au, Ag, Sb, As, Se, and Hg. The content of S is low, mostly < 1%. Silver ores of more complex mineral and elemental compositions were produced under the impact of granitoid intrusion at the late volcanoplutonic stage. The major minerals are high-Hg kustelite and native silver, silver sulfosalts and selenides, fahlore, pyrite, chalcopyrite, galena, and sphalerite. The typomorphic elemental composition of ores is as follows: Ag, As, Sb, Se, Hg, Pb, Zn, Cu, and B. The content of S is much higher than 1%. The ores also have elevated contents of Mo, Ge, F, and LREE (La, Ce, and Nd). At the volcanoplutonic stage, polychronous Au-Ag ores formed at the sites of the coexistence of silver and epithermal gold-silver mineralization. Their specific feature is a multicomponent composition and a strong variability in chemical composition (both qualitative and quantitative). Along with the above minerals, the ores contain high-Hg gold, hessite, argyrodite, canfieldite, orthite, fluorapatite, and arsenopyrite. At the sites with strongly rejuvenated rocks, the ores are strongly enriched in Au, Ag, Hg, Cu, Pb, Zn, Ge, Se, La, Ce, Nd, S, and F and also contain Te and Bi. The hypothesis is put forward that the late silver ores belong to the Ag-complex-metal association widespread in the Omsukchan ore district. A close relationship between the ores of different types and their zonal spatial distribution have been established. In the central part of the Rogovik deposit, epithermal Au-Ag ores are widespread in the upper horizons, Ag ores are localized in the middle horizons, and rejuvenated polyassociation Au-Ag ores occur at the sites (mostly deep-seated) with ore-bearing structures of different ages.     

Genetic Aspects of the Noble-Metal Mineralization at the Poperechnoe Deposit,Lesser Khingan,Russia

Bodies of cryptovolcanic rocks (fluidolites) play a significant role in the structure of the Poperechnoe ferromanganese deposit, Lesser Khingan, Russia. Fe-Mn ores in association with fluidolites are localized in ancient carbonate rocks. PGM, gold, and silver minerals up to tenths of a millimeter in size are established in the rocks and ores of the deposit. Characteristic admixtures in the platinum are iron (9-11%), with less common copper, iridium, and osmium. An intergrowth of isoferroplatinum polycrystal with forsterite is observed. There are also individual grains of Os-Ir-Ru-Rh intermetallides. The gold grains (up to 93% Au) are characterized by dendritic and clumpy morphology, frequently showing faceting elements. The grains are frequently rounded and sometimes have an almost perfect spherical shape. Native silver is distributed among the dolomites, as well as in the dolomitic fragments from the fluidolites. Ubiquitous admixtures in the silver are copper, iron, and more rarely zinc; single grains contain admixtures of molybdenum, nickel, gold, and palladium. PGM and high-fineness gold are related to the fluidolites, which are the only magmatic rocks in the studied range of the deposit. Silver, its minerals, low-fineness gold, and sulfides are confined to the rocks and ores subjected to the regional dolomitization, low-temperature hydrothermal reworking, and silicification. Samples contain up to 11.3 g/t platinum, 2.35 g/t gold, 296.2 g/t silver, which allows us to consider the studied object as economically promising for noble metals.     

中国有色金属伴生银矿床中若干银矿物的初步研究

有色金属矿床伴生银是一种十分普遍的现象,在中国则构成为银资源的主体,在各种类型的伴生银矿床中,银主要作用独立银矿物产出,并形成种类繁多的银矿物。中国主要有色金属伴生银太床中已初步发现银矿物５０多种。本文对其中若干种国内首次发现或 少见的银矿物的产出特征作了简要的介绍。     

从周边国家银矿床地质特征探讨中国银矿找矿前景

中国周边国家银(含银)矿床主要分布于原苏联、蒙古、日本、朝鲜、菲律宾、缅甸、印尼等国家。有5种类型银(含银)矿床可与中国相应地区银(含银)矿床进行类比,即①陆边缘带陆相火山岩型(金-)银(-多金属)矿床;②火山(-次火山)热液型含银黄铁矿型铜或多金属矿床;③斑岩型银或含银金-铜(铅-锌-锡)矿床;④变质热液交代型金-银矿床(穆龙套型)或银-铅-锌矿床;⑤矽卡岩型含银磁铁矿或多金属矿床。并提出我国相应地区银矿找矿前景。