【作者】 李毅； 徐文忻； 刘悟辉； 李蘅； 戴塔根；

【Author】 LI Yi~1,2) XU Wenxin~2) LIU Wuhui~1) LI Heng~2) DAI Tagen~1) 1)Central South University,Changsha,Hunan,410083;2)Guilin Research Institute of Geology for Mineral Resources,Guilin,Guangxi,541004

【机构】 中南大学； 桂林矿产地质研究院；

【摘要】 对滇、黔、桂微细浸染型金矿硫化物进行硫、铅同位素测定,获得马雄、浪全、金牙、高龙、堂上等矿床²⁰⁶Pb/²⁰⁴Pb 比值为17.636～19.530;²⁰⁷Pb/²⁰⁴Pb 比值为15.451～16.092;²⁰⁸Pb/²⁰⁴Pb 比值为37.871～40.854。用等时线斜率与铅同位素曲线关系剖析,矿床形成年代晚于矿床赋存层位,铅来源较为复杂。金牙矿床硫化物的δ³⁴S 值为-23‰～-1‰;高龙矿床硫化物的δ³⁴S 值为-15.3‰～15.6‰;板其矿床硫化物的δ³⁴S 值为-1.5‰～14.7‰;柴木函矿床硫化物的δ³⁴S 值为0.2‰～18.0‰;戈塘矿床硫化物的δ³⁴S 值为-29.2‰～5.0‰;丫他矿床硫化物的δ³⁴S 值为5.5‰～8.0‰,获得矿床有单一岩浆来源,单一海水（地层）来源和混合来源3种类型矿床。更多还原

【Abstract】 The sulfide and lead minerals in the micro-disseminated gold deposits of Yunnan-Guizhou-Guangxi area were analyzed bysulfur and lead methods.It is shown that ²⁰⁶Pb/²⁰⁴pb values vary from 17.636 to 19.530,²⁰⁷Pb/²⁰⁴Pb from 15.451 to 16.092,and²⁰⁸Pb/²⁰⁴Pb from 37.871 to 40.854 in such deposits as Maxiong,Langchuan,Jingya,Gaolong and Changshang.The gold depositswere formed later than their host sedimentary rocks.The origins of lead are complicated.The δ³⁴S values of sulfides in the Jingya de-posit vary from-23‰ to-1‰,those in the Gaolong deposit vary from-15.3‰ to 15.6‰,those in the Banqi deposit vary from-1.5‰ to 14.7‰,those in the Chaimohan deposit vary from 0.2‰ to 18.0‰,those in the Guochang deposit vary from-29.2‰to 5.0‰,and those in the Yata deposit vary from 5.5‰ to 8.0‰.These data indicate that there exist three sulfur sources,i.e.,magma,seawater and mixed magma and sulfate in seawater.更多还原