| 郭耀文,张庆松,朱派彬,吕杜,王能,艾金彪.云南万龙山锌锡多金属矿床硫、铅同位素特征及矿质物质来源研究[J].地质找矿论丛,2018,33(4):564-572 |
| 云南万龙山锌锡多金属矿床硫、铅同位素特征及矿质物质来源研究 |
| Study on sulphur and lead isotope composition characteristics and ore material source of Wanlongshan Sn-Zn pollymetallic ore deposit in Yunnan province |
| 投稿时间：2018-08-11 修订日期：2018-11-12 |
| DOI：10.6053/j.issn.1001-1412.2018.04.009 |
| 中文关键词: 万龙山锌锡多金属矿床 硫同位素 铅同位素 都龙矿田 成矿物质来源 矿床成因 云南省 |
| 英文关键词:Wanlongshanore Sn-Zn polymetallic deposit sulphur isotope lead isotope Dulongtin ore field genesis of the ore deposit Yunnan province |
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| 中文摘要: |
| 万龙山矿床是云南都龙锡矿田南段的一个大型锌锡多金属矿床，本次通过矿床地质特征及其同位素方法研究得出：硫化物矿石的硫同位素测试结果显示，δ34S值范围-1.1×10-3~5×10-3，峰值集中在0~2×10-3之间，具有明显的塔式效应，与岩浆熔体硫同位素组成范围较为吻合，与海底喷流沉积型矿床的硫同位素特征有较明显的区别；推测硫源主要为岩浆来源，与老君山期岩浆作用有关，但有明显的幔源硫的参与和一定程度地层硫的混染。铅同位素208Pb/204Pb变化范围为38.472~39.2，207Pb/204Pb变化范围为15.618~15.76，206Pb/204Pb变化范围为18.312~19.156；μ值分布范围为9.51~9.73，平均9.63，介于原地幔（μ=7.80）与地壳（μ=9.81）之间，反映出壳幔混合铅的特征，据此判断矿区岩（矿）石的铅源以上地壳为主要来源，并有部分来自上地幔或下地壳的铅。结合矿床地质特征及硫、铅同位素特征，认为成矿作用主要与燕山晚期的岩浆热液有关，矿床类型为矽卡岩型锌锡多金属矿床。 |
| 英文摘要: |
| Wanlongshan deposit is a large-scale Sn-Zn polymetallic deposit located at the south section of Dulong Sn-Zn ore field in Maguan county, Wenshan Prefecture, Yunnan province. In this paper we have made investigations on the geological characteristics and ore isotope compositions. δ34S values of sulfide ores is ranged from -1.1×10-3 to 4.93×10-3, with peak values centering between 0 and 2 and tower effect coinciding with that of magmatic melt and differing from that of Sedex ore deposit. 208Pb/204Pb ratio from 38.472 to 39.2, 207Pb/204Pb ratio from 15.618 to 15.74, 206Pb/204Pb ratio is ranged from 18.312 to 19.156. The μ-values is ranged from 9.51 to 9.73, averaging 9.63 between those of the primitive mantle(μ value is 7.80) and the crust (μ value is 9.81)that is characteristic of mixture of the mantle Pb and crust Pb. Pb of the rock and ore in the deposit inferred to come mainly from the upper crust and the upper mantle material a lower crust material may be incorporated. On basis of geological characteristics and previous data the deposit is a Late Yanshanian magmatic hydrothermal fluid-related ore deposit, a skarn type Sn-)Zn polymetallic deposit. |
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