摘要
为研究亚贵拉铅锌矿床矿石矿物特征,本文以矿石及围岩中的金属矿物作为研究对象,通过电子探针及铅硫同位素分析,可知:方铅矿化学成分含少量Zn和Fe,平均含铅82.01%,闪锌矿化学成分含少量Mn,含铁达10.52%~10.99%,平均含锌53.36%,闪锌矿形成于中高温环境;研究区金属矿物^(206)Pb/^(204)Pb值为18.410~19.773,平均18.640,^(207)Pb/^(204)Pb值为15.589~15.778,平均15.674,^(208)Pb/^(204)Pb值为38.161~39.362,平均38.922,矿石和围岩铅同位素图具线性关系,有较稳定的多源性成矿物质;围岩及矿石硫同位素δ34S值主要集中分布在4.26‰~5.93‰,显示出两者具紧密同源关系,与地壳熔融产生的酸性岩浆δ^(34)S值基本一致。结合区域成矿地质,综合前人数据分析,进一步证实亚贵拉铅锌矿床成因属于矽卡岩型。
In order to study the ore mineral characteristics of Yagui lead-zinc deposit,this paper takes the metal minerals in ores and wall rocks as the research object.Through electron probe analysis,it can be known that the chemical composition of galena contains a small amount of Zn and Fe,with an average lead content of 82.01%,the chemical composition of sphalerite contains a small amount of Mn,with iron content of 10.52%-10.99%,and an average zinc content of 53.36%.sphalerite is formed in a medium high temperature environment。The^(206)Pb/^(204)Pb values of metal minerals in the mining area range from 18.410 to 19.773,with an average of 18.640^(207)Pb/^(204)Pb values ranging from 15.589 to 15.778,and an average of 15.674^(208)Pb/^(204)Pb values ranging from 38.161 to 39.362,with an average of 38.922.There is a linear relationship between the lead isotopes of the ore and surrounding rock,indicating a relatively stable multi source mineralization material.Sulfur isotopes of surrounding rocks and ores theδ^(34)S value is mainly distributed between 4.26‰and 5.93‰,indicating a close homologous relationship between the two and the acidic magma produced by crustal melting theδ^(34)S value is basically consistent.Based on regional mineralization geology and previous data analysis,it is further confirmed that the genesis of the Yaguila lead-zinc deposit belongs to the skarn type.
作者
廖诗进
郭亚娇
杨长青
张哨波
陈俊魁
杜保军
LIAO Shijin;GUO Yajiao;YANG Changqing;ZHANG Shaobo;CHEN Junkui;DU Baojun(Henan Academy of Geology,Zhengzhou 450001,Henan,China;Henan Key Laboratory of Metal Mineralization Geological Process and Resource Utilization,Zhengzhou 450001,Henan,China;Key Laboratory of Metallogenic Geological Process and Resources Utilization in Henan Province,Zhengzhou450001,Henan,China;Henan Research Center of Urban Geological Engineering Technology,Zhengzhou 450001,Henan,China)
出处
《矿产勘查》
2023年第5期730-740,共11页
Mineral Exploration
基金
郑州市自然资源和规划局项目“郑州市多要素城市地质调查(DKSHT-2020-0116)”资助。
