【摘要】 针碲银金矿产于北岭金矿的晚期矿化阶段，赋存于梳状排列网脉状的石英中，与自然金伴生。矿物组合为针碲银金矿自然碲碲铅矿自然金石英和针碲银金矿碲镍矿碲铅矿石英。自然碲、碲镍矿、碲铅矿在针碲银金矿中呈包裹体产出。针碲银金矿呈柱状、板状、粒状晶形，聚片双晶，具强非均质性及双反射和反射多色性，Ｈｖ５０＝２１６—２１９ｋｇ／ｍｍ２。其化学成分：Ａｇ１０．５８％—１２．３６％，Ａｕ２３．７０％—２４．５１％，Ｔｅ６１．６７％—６２．３０％，含少量Ａｓ、Ｃｕ、Ｚｎ、Ｆｅ和Ｎｉ，分子式为ＡｇＡｕ１．０４９４—１．２６９１Ｔｅ４．２１５—４．９１８２。Ｘ射线衍射的强线有：３．０５４（８５），２．１５３（３１），１．９８４（１８），晶胞参数：ａ０＝８．９５０２Ａ，ｂ０＝４．４９７３Ａ，ｃ０＝１４．７０６３Ａ，β＝１４５°５８′。在成矿溶液中Ａｕ和Ｔｅ呈络合物运移，在温度低、硫逸度低、偏酸性及大气水参与的条件下，发生金的富集成矿作用。针碲银金矿及其它碲化物是北岭金矿晚期矿化阶段的特征标志，对寻找大型火山岩浅成热液碲化物型金矿具有重要的意义。更多还原

【Abstract】 Sylvanite was formed at the late mineralization stage of the Beiling gold deposit and occurs in comby network quartz, associated with native gold. The mineral assemblage includes sylvanite na tive tellurium altaite native gold quartz and sylvanite melonite altaite quartz. Native tellurium, melonite and altaite exist as inclusions in sylvanite. Sylvanite occurs in columnar, tabular and grained forms and assume polysynthetic twin with strong anisotropy and bireflectance. H v 50 =216—219 kg/mm 2. Chemical composition:Ag 10.58%—12.36%,Au 23.70%—24.51%, Te 61.67%—62.30%, with small amounts of As, Cu, Zn, Fe and Ni. Chemical formula is Ag Au 1.0494—1.2691 Te 4.215—4.9182 . The strongest X ray diffraction lines are 3.054(85),2.153(31),and 1.984(18). Unit cell parameters: a 0 =8.9502,b  0 =4.4973,c 0 =14.7063 and β=145°58′. The ore deposit was formed at 115.2—161.8℃ and lower sulfur fugacity. Hydrogen and oxygen isotopic studies show that ore forming fluids came from meteoric water of low salinity. The gold deposit is considered to be of volcanic epithermal type.更多还原