陕西秦岭驾鹿金矿区发现的含氧金矿物  

STUDY ON MINERALOGY OF 40 KINDS OF OXYGEN-BERARING GOLD MINERALS FOUND IN THE JIALU GOLD ORE ZONE,QINLING MOUNTAIN,SHAANXI PROVINCE

作　　者：周新春 徐斌[2] 翟明国[3] 刘良[4] 舒桂明[5] 徐忠良 刘雪刚 张华 李鸿波 贾小梅 徐平[3] 李成玉 

机构地区：[1]武警黄金八支队,新疆乌鲁木齐830057 [2]中国地质大学,北京100083 [3]中国科学院地质与地球物理研究所,北京100029 [4]西北大学,陕西西安710069 [5]北京大学,北京100871

出　　处：《矿物学报》2008年第2期196-206,共11页Acta Mineralogica Sinica

基　　金：黄金指挥部科研项目(HJ94-2-1HJ95-2-5HJ96-2-4)

摘　　要：在陕西秦岭驾鹿金矿区发现了16个类型40种含氧金矿物。电子探针分析结果显示其主要成分为Au、Pb、Fe、Te和O。虽与前苏联发现的别斯麦特矿、毕利宾矿、博格丹诺夫矿以及我国东坪金矿床发现的金的碲酸盐矿物有类似之处，但因其普遍含不等的Mn，Ca或A1，As，Co，Ni等而又有所不同，因此很可能存在新的矿物种或新（亚）种金矿物。X射线衍射分析表明，大部分的晶体结构可能是由Au，Ag，Cu，Fe或Pb等金属互化物组成的假立方品格与一个由β-TeO2（可能包括PbO或CaO）组成的斜方品格的混晶，但不排除它们是含金氧化物的可能性；还有些可能是玻璃质或纳米级矿物，少部分则呈现准品态物质的特征。这40种含氧金矿物主体与黄铁矿，碲金矿和石英共生，显然属于内生热液成因。依据金的地球化学行为，以及区内含氧金矿物富含Te（10％-20％）和含不等量Mn的成分特征，分析认为该矿床成矿元素（Au）主要是在碲酸及硫酸溶液中并有氧化剂MnO2存在的条件下迁移，富集成矿的。Forty kinds of oxygen-bearing gold minerals firstly discovered in the Jialu gold ore zone, Qinling Mountain, Shaanxi Province, showing brown, purple and black colors. They often appear as irregularly fine crystalline grained aggregates ranging from 0.01 mm to 0. 50 mm in diameter. They show purplish black streak and submetallic luster. The HM is 2 -3. The microstructure analyses of the 40 kinds of oxygen-bearing gold minerals in the Jialu gold ore zone indicated that they are closely associated with pyrite, calaverite and quartz, suggesting that their genesis is related to endogenetic hydrothermal process. From the geochemical behavior of gold, and the oxygen-bearing gold minerals enriched in Te （10%-20% ） and containing minor Mn, it is considered that the gold of this mine was migrated and enriched in sulfate solution with MnO2.There were detected 16 types and 40 species of oxygen-bearing gold minerals, which have basically been comfirmed in the Jialu gold mine based on microprobe analyses. The main component elements of these minerals are Au, Pb, Fe, Te and O, which are similar to those of bessmertnovite, bilibinskite and bogdanovite discovered in the former Soviet Union, and gold-bearing rellurate （subtellurate） in the Dongping gold mine in China. Their trace elements, however, are Mn, Ca, or Al, As, Coand Ni, etc. , different from those of the minerals mentioned above.. Therefore, these oxygen-bearing gold minerals would be a series of new mineral species, of new mineral species, or new subspecies of gold minerals. X-ray powder diffraction analysis indicated that most of the minerals are mix-crystal composed of Au, Ag, Cu, Fe or Pb with pseudocubic lattice and β-TeO2 （probably also including PbO or CaO） with orthorhombic lattice, but possibly are gold-bearing oxides as well, and some of vitreous or millimicronic minerals, and a few are quasicystals.

关 键 词：驾鹿金矿区 含氧金矿物 地质产状及矿物共生组合 成分特征及初步分类 X射线衍射数据 晶体结构 

分 类 号：P574.02[天文地球—矿物学]