摘要
北京市得田沟金矿床是受韧性剪切带控制的金－黄铁矿－多金属硫化物石英脉型金矿床。笔者通过研究发现该矿床中的碲已达工业品位。碲主要以碲矿物的形式存在，包括碲铅矿、碲金银矿、碲铋银矿、碲银矿和碲铋矿，双碲化物针碲金银矿、六方碲银矿、未定名矿物ＡｇＳ１＋ｘＴｅ１－ｘ（ｘ＝０．０９－０．５８）（Ｍ１）、（Ａｕ０．９２Ａｇ０．９８）（Ｔｅ３．７５Ｓ０．２５）（Ｍ２）、（Ａｕ０．７１Ａｇ０．４４）（Ｔｅ１．８３Ｓ０．１７）（Ｍ２）、（Ａｇ０．７４Ｐｂ０．８０）（Ｓ１．６１Ｔｅ０．３９）（Ｍ３）、Ｐｂ（Ｓ１．１８Ｔｅ０．８２）（Ｍ４）以及自然碲。通过显微镜观察，确定碲矿物的共生顺序依次为：（１）碲铅矿＋碲金银矿＋碲铋银矿＋碲银矿＋碲铋矿；（２）针碲金银矿＋六方碲银矿（＋自然碲）；（３）Ｍ１＋Ｍ２＋Ｍ３＋Ｍ４＋自然碲。利用ｆＴｅ２－Ｔ和ｆＴｅ２－ｆＳ２图解估算该矿床矿化过程中的ｆＴｅ２从１０－１５．１－１０－１１．２Ｐａ（局部为１０－１９．５）升至高于１０－１０．５Ｐａ，最后达１０－９．１Ｐａ以上。
The Detiangou gold deposit in Beijing is of gold-pyrite-polymetallic sulfide quartz vein type, generally controlled by ductile shear zones adjacent to the ore-control fault zone (F1 ). Tellurium in the ores has been economically concentrated. Lots of interesting minerals have been discovered, such as tellurium-bearing minerals like altaite, petzite, volynskite, hessite and tellurbismuth, binary tellurides like sylvanite, stuetzite,unnamed minerals like AgS1+x Te1-x (x= 0. 09-0. 58 ) (M1 ), (Au0. 92 Ag0. 98 ) (Te3. 75 S0.25 ) (M2 ), (Au0. 71Ag0.44 ) (Te1.83S0. 17 ) (M2 ), (Ag0.74Pb0. 80 ) (S1.61Te0. 39 ) (M3 ), and PbS1.18Te0. 82 (M4 ), and native tellurium. The paragenetic sequence of telluride minerals might be divided into three stages: (1)altaite + petzite + volynskite + hessite + tellurbismuth ; (2) sylvanite + stuetzite (+ Native tellurium), and (3 ) M1 + M2 + M3 + M4 + native tellurium, fTe2 of the oreforming fluid was increasing in the process of Te-Au-Ag mineralization
出处
《岩石矿物学杂志》
CAS
CSCD
1996年第1期80-91,T001,共13页
Acta Petrologica et Mineralogica
关键词
金矿床
碲矿物
成矿条件
gold deposit
telluride mineral
metallonenic condition
