廖诗进,郭亚娇,杨长青,张哨波,陈俊魁,杜保军.西藏亚贵拉铅锌矿床矿石与矿物地球化学特征[J].矿产勘查,2023,14(5):730-740 |
西藏亚贵拉铅锌矿床矿石与矿物地球化学特征 |
Geochemical characteristics of ore and mineral of the Yaguila lead-zinc deposit, Tibet |
投稿时间:2021-10-27 修订日期:2022-02-21 |
DOI:10.20008/j.kckc.202305005 |
中文关键词: 亚贵拉铅锌矿床 电子探针 硫同位素 矽卡岩 西藏 |
英文关键词: Yaguila lead-zinc deposit electron probe sulfur isotope skarn Tibet |
基金项目:本文受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 |
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中文摘要: |
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206Pb/204Pb值为18.410~19.773,平均18.640,207Pb/204Pb值为15.589~15.778,平均15.674,208Pb/204Pb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δ34S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。 |
英文摘要: |
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 206Pb/204Pb values of metal minerals in the mining area range from 18.410 to 19.773, with an average of 18.640207Pb/204Pb values ranging from 15.589 to 15.778, and an average of 15.674208Pb/204Pb 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 the δ34S 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 the δ34S 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. |
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