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1.
桃园金矿成因比较复杂，岩矿测试和电镜扫描研究表明，金矿矿物组合可划分为金－石英－细粒黄铁矿－毒矿型，金－石英－银－多金属硫化物型；金－石英－自形黄铁矿３种类型，通过对矿石的矿物组分和化学成分，以及金，银的赋存状态研究，认为桃园金矿的矿石属于金矿矿物极细，而矿物组成比较复杂的矿石类型。 相似文献
2.
陆丰黄铁矿床的原生矿石中普遍含金，含量０．３ｇ／ｔ以上者产于－１００ｍ标高以上。金在矿石中的赋存状态以次显微金为主。利用浮选－氰化浸出工艺回收这些伴生金是可行的。应特别重视浅部矿石的综合利用。 相似文献
3.
紫木凼金矿床载金矿物及金的赋存状态 总被引：2，自引：0，他引：2
紫木凼金矿床主要载金矿物为含砷黄铁矿和毒砂,氧化矿石中,金呈显微粒状自然金－显微金嵌布于褐铁矿,石英水云母,方解石的颗粒间或孔隙中,原生矿石中,金主要呈次显微粒自然金－次显微金包裹体,其次是类质同像形式赋存在含砷黄铁矿和毒砂矿物中。 相似文献
4.
以杰尔图拉克矿化特征为例研究了阿穆尔河流域碳酸盐岩中金的成矿作用,并将碳酸盐围岩和矿石与美国内华达州卡林金矿床进行了地球化学和岩石化学的比较分析。查明了含有粘土－水云母（Ｋ、Ａｌ）组分及多种成矿元素的白云岩的矿化富集趋势。矿体为条带状或角砾状白云岩,它具有脉状金－金金属、透镜状金－磁铁矿－磁黄铁矿及浸染状金－黄铁矿－毒砂等矿化。矿化在碳酸盐岩层剖面中占据一定的层位。矿石特征是金以不同粒度的、成色高 相似文献
5.
在对美国卡林硫化物金床和俄罗斯五月金矿床详细研究的基础上,指出两个含金－硫化物金矿床都与低温金－银,锑－汞和汞矿床共生。矿石中的金主要是细分散金并在针状砷黄铁矿中的形成亚微细包体。分析两个矿床的矿石成分,不难看出在含金量和造岩地元素上也有一系列相似之处,从有机碳含量到含矿交代岩中钾,钠状态都如此,从外表看,它们都必于沉积或者热液－沉积成矿。在储量方面,细分散型矿石的含金矿床往往是大型或越大型矿床, 相似文献
6.
秦岭造山带热水沉积矿石建造特征及意义 总被引：2，自引：0，他引：2
根据矿石建造分析原理和秦岭造山带泥盆纪热水沉积盆地特征,将秦岭造山带多金属热水沉积矿石建造划分为秦岭微板块陆缘复合盆地金或金多金属矿石建造和秦岭微板块内裂陷－坳陷盆地铅锌金多金属矿石建造,并据各二级矿石建造内产划分出次级矿石建造。从秦岭造山带大地构造演化角度论述了矿石建造形成的地 相似文献
7.
泡沫塑料吸附磺——四氯化碳萃取光度法间接测定矿石中的金 总被引：2，自引：0，他引：2
本文利用泡沫塑料吸附富集金，灰化塑料后，采用Ｉ２－ＣＣｌ４萃取光度法测定矿石中的金，取得了较为满意的结果。 相似文献
8.
9.
新疆阿希金矿I号矿床矿石特征及其成因意义 总被引：2，自引：0，他引：2
通过对阿希金矿Ⅰ号矿床的矿石物质组分研究，划分了矿石类型和矿石结构构造。查明了矿石的化学组分和矿物组成，详细研究了金矿物和主要载金矿物的矿物特征和标型特征。根据矿物共生组合及成因特征，结合石英包裹体测温和氢氧同位素研究，认为阿希金矿Ⅰ号矿床为以低温为主的中－低温火山热液型金矿床。 相似文献
10.
鹿儿坝金矿床成质特征与找矿标志 总被引：1，自引：0，他引：1
鹿儿坝金矿床产行西秦岭中三叠统浊积岩建造的浅变质岩中的ＮＷＷ向断裂破碎带及两侧硅化蚀变带内,矿石的金矿物由自然金和银金矿组成,以粒间金为主,次为裂隙金和包裹金,矿石分为破碎角砾岩型和碎屑岩型。金矿与围岩硅化,黄铁矿化蚀变关系密切,具有消长关系,微量元素显示Ａｕ－Ａｓ－Ｓｂ－Ｈｇ－Ｂｉ低温矿物元素组合,表明鹿儿坝金矿为 温热液型金矿床,同时指出了沉积相,构造破碎带,硅化黄铁矿化蚀变等找矿标志。 相似文献
11.
S. Jaireth 《Australian Journal of Earth Sciences》2013,60(3):181-189
This paper presents the results of thermodynamic calculations on the solubility of gold and silver in low‐temperature, moderately saline, oxygen‐saturated fluids. Based on the solubilities of gold and silver it is argued that the quantity of gold transported by the fluids depends on the concentration of silver in the primary ores. In ores where the silver/gold ratio is high (1 to > 10), the fluids become saturated in silver and can not dissolve geologically significant concentrations of gold. In ores where the silver/gold ratio is low (< 1), the fluids remain undersaturated with respect to silver and are able to dissolve geologically realistic concentrations of gold and silver. The oxidized fluids start depositing gold and silver as they move downwards and are reduced by the Fe+2‐bearing minerals of the primary ores. The occurrence of gold in lateritic profiles can be explained by a prolonged process of interaction between the fluid and primary ores, during which gold and silver precipitate and redissolve selectively at the gradually advancing oxidation‐reduction interface. 相似文献
12.
本文介绍了堆浸提金原理和在实验室进行金矿石堆浸可行性研究的方法.以我国辽宁猫岭金矿、四川茶铺子金矿和福建紫金山金矿为研究对象,研究了矿石粒度、氰化钠溶液浓度、浸出时间等因素对金浸出率的影响,从而确定堆浸提金最佳工艺条件.通过对上述三类矿石性质及堆浸性能的比较,认为矿石的物质组成和金的嵌布特性对金的浸出率影响较大. 相似文献
13.
贵州省兴义市雄武地区金矿主要为卡林型,其次为红土型,矿床受断裂构造控制,矿石为中等含硫微细浸染状氧化矿石。目前浅部矿石已基本采完,深部矿石品位较低(0.8~1.8 g/t),因此有效提高低品位矿石浸出率和金回收率至关重要。研究表明,筑堆时矿石粒度和喷淋时氰化钠浓度是堆浸生产中的重要影响因素。矿石粒度大,金浸出率低;氰化钠浓度大,则成本增加。根据矿石物质成分和工艺特征研究,得到矿石冶炼时的最佳工艺条件:筑堆时矿石粒度为15~25 mm,氰化钠浓度为0.05%~0.08%。该研究有效提高了矿石浸出率,降低了运营成本,为金矿石堆浸实际生产提供了理论和实验依据。 相似文献
14.
安徽铜陵某铁帽型金-铁矿床金的赋存状态研究 总被引：3，自引：0，他引：3
对某铁帽型金-铁矿床金的赋存状态进行了研究,分析了矿石的化学组成和矿物组成,通过溶解度和物相分析,区分矿物金和分散金,测定了金矿物的成分、粒度和嵌布关系,进行了金的平衡配分,指出了金的回收方向。 相似文献
15.
Mineralogy of the Boroo Gold Deposit in the North Khentei Gold Belt,Central Northern Mongolia 
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下载免费PDF全文 Mineral assemblages and chemical compositions of ore minerals from the Boroo gold deposit in the North Khentei gold belt of Mongolia were studied to characterize the gold mineralization, and to clarify crystallization processes of the ore minerals. The gold deposit consists of low‐grade disseminated and stockwork ores in granite, metasedimentary rocks and diorite dikes. Moderate to high‐grade auriferous quartz vein ores are present in the above lithological units. The ore grades of the former range from about 1 to 3 g/t, and those of the latter from 5 to 10 g/t, or more than 10 g/t Au. The main sulfide minerals in the ores are pyrite and arsenopyrite, both of which are divisible into two different stages (pyrite‐I and pyrite‐II; arsenopyrite‐I and arsenopyrite‐II). Sphalerite, galena, chalcopyrite, and tetrahedrite are minor associated minerals, with trace amounts of bournonite, boulangerite, geerite, alloclasite, native gold, and electrum. The ore minerals in the both types of ores are variable in distribution, abundance and grain size. Four modes of gold occurrence are recognized: (i) “invisible” gold in pyrite and arsenopyrite in the disseminated and stockwork ores, and in auriferous quartz vein ores; (ii) microscopic native gold, 3 to 100 µm in diameter, that occurs as fine grains or as an interstitial phase in sulfides in the disseminated and stockwork ores, and in auriferous quartz vein ores; (iii) visible native gold, up to 1 cm in diameter, in the auriferous quartz vein ores; and (iv) electrum in the auriferous quartz vein ores. The gold mineralization of the disseminated and stockwork ores consists of four stages characterized by the mineral assemblages of: (i) pyrite‐I + arsenopyrite‐I; (ii) pyrite‐II + arsenopyrite‐II; (iii) sphalerite + galena + chalcopyrite + tetrahedrite + bournonite + boulangerite + alloclasite + native gold; and (iv) native gold. In the auriferous quartz vein ores, five mineralization stages are defined by the following mineral assemblages: (i) pyrite‐I; (ii) pyrite‐II + arsenopyrite; (iii) sphalerite + galena + chalcopyrite; (iv) Ag‐rich tetrahedrite‐tennantite + bournonite + geerite + native gold; and (v) electrum. The As–Au relations in pyrite‐II and arsenopyrite suggest that gold detected as invisible gold is mostly attributed to Au+1 in those minerals. By applying the arsenopyrite geothermometer to arsenopyrite‐II in the disseminated and stockwork ores, crystallization temperature and logfs2 are estimated to be 365 to 300 °C and –7.5 to –10.1, respectively. 相似文献
16.
This study of the behavior of trace and rare earth elements in ores from the Natalka gold deposit allows us to draw several conclusions. It is suggested that ore formation is related to the regional metamorphism of the host terrigenous carbonaceous rocks, which could be the major source for trace and rare earth elements. Minor enrichment of the Natalka ores in W is evidence of the contribution of magmatic fluid, which could be superimposed on early quartz veins, in ore formation. Our results support the metamorphic–magmatic model of formation of economic gold–quartz deposits of the Yana–Kolyma Belt. The similarity of metasomatites of the Natalka deposit with disseminated gold–sulfide refractory ores from the Nezhdaninskoe and Bakyrchik deposits points to the possible presence of such ores in the Natalka deposit. Our data are important for forecasting regional metallogenic reconstructions, search, and evaluation of gold deposits. 相似文献
17.
山东谢家沟金矿床矿石与金矿物特征 总被引：2，自引：0，他引：2
新发现的谢家沟大型金矿床位于山东招远市西南部, 对其进行详细的宏观、微观矿石学基础研究, 包括矿石类型和成矿期次的划分以及金矿物的成色等, 对指导该区找矿具有重要意义.矿石类型划分为原生矿石和氧化矿石, 其中原生矿石分为黄铁绢英岩、黄铁矿-黄铜矿绢英岩、多金属硫化物绢英岩和黄铁矿-黄铜矿石英脉等4类, 它们分布于脆-韧性剪切带不同部位, 成矿作用方式有差别.成矿期次分2期5阶段.金的赋存状态主要有包体金、晶隙金和裂隙金, 金矿物成色平均值为844.19, 为中深成矿作用产物, 其中包体金成色均值为859.96, 晶隙金为843.83, 裂隙金为833.08, 反映从包体金至晶隙金再到裂隙金的成矿作用温度是逐渐降低的. 相似文献
18.
《International Geology Review》2012,54(11):1037-1045
Cambrian stratabound gold deposits in the western Qinling Mountains are hosted in a siliceous formation composed of black chert and carbonaceous slate. Studies have shown that Se is sufficiently high in abundance either in wall rocks or in gold ores as to reach economic grade. Locally, some independent Se ore bodies (Se >500 ppm) can be delineated. In gold ores, Se is present mainly as separate minerals, or as isomorphous solutions in sulfides. In addition, Se is positively correlated with Au. What is more important is that in the gold ores, native gold is commonly intimately inter-grown with selenium minerals. On the basis of this unique phenomenon, the authors hypothesize that gold and selenium may be transported by Au-S-Se or Au-Se complexes. The co-enrichment of Au and Se is attributed mainly to the boiling of ore fluids and their mixing with shallow-seated oxygen-bearing water. 相似文献
19.
东大滩锑金矿微生物预氧化提金试验研究 总被引：1，自引：0，他引：1
介绍了东大滩难浸金矿石微生物预氧化的方法及结果。东大滩石英脉型锑金矿石因金被毒砂包裹而难浸，采用微生物预氧化处理后全泥氰化金的浸出率由原来的17．04％提高到70．80％，柱浸由15．39％提高到63．02％，且酸耗较低，各项指标合理，是解决该类矿石难浸的理想方法。 相似文献
20.
简要叙述福建省仙游县山坪洋金矿的区域地质和矿区地质特征,重点介绍矿区构造、围岩蚀变,金矿（化）体特点,并对金矿成因作初步分析,进而提出区内金矿的找矿前景。 相似文献