| 李肖龙.豫西熊耳山地区北岭金矿Pb、S同位素特征及其地质意义[J].地质与勘探,2020,56(2):253-264 |
| 豫西熊耳山地区北岭金矿Pb、S同位素特征及其地质意义 |
| Geochemical characteristics of sulfur and lead isotope composition in the Beiling gold deposit, Xiong’ershan area, western Henan Province and their geological significance |
| 投稿时间：2018-07-22 修订日期：2019-10-20 |
| DOI：10.12134/j.dzykt.2020.02.002 |
| 中文关键词: 铅同位素 硫同位素 北岭金矿 熊耳山地区 |
| 英文关键词: lean isotope, sulfur isotope, Beiling gold deposit, Xiong’ershan area |
| 基金项目:国家重点研发计划项目（编号：2016YFC0600504-02）和中国地质调查局项目（编号：DD20190159-23、121201004000160901-18）联合资助 |
|
| 摘要点击次数: 1882 |
| 全文下载次数: 855 |
| 中文摘要: |
| 位于豫西熊耳山地区的北岭金矿是一构造蚀变岩型金矿床，金矿化严格受断裂构造控制。本文在详细的矿床地质特征研究基础上，采集主成矿阶段的矿石并挑选其中的黄铁矿进行铅和硫同位素研究。结果表明，黄铁矿的208Pb/204Pb值为36.789~37.861，平均值为37.455；207Pb/204Pb值为15.383~15.505，平均值为15.444；206Pb/204Pb值为16.373~17.294，平均值为16.939。矿石铅μ值为9.36~9.43，平均值为9.38；Th/U值为4.04~4.17，平均值为4.09。矿石铅主要来源于地幔，有壳源物质的混染。黄铁矿的δ34S为-9.6‰~-16.6‰，平均为-14.85‰，表明随着成矿过程的进行，硫同位素发生了较强烈的分馏，分馏原因可能是因天水加入到成矿流体中导致氧逸度升高造成的。 |
| 英文摘要: |
| The Beiling gold deposit, located in the Xiong’er shan area, western Henan, is of the tectonically altered rock type. Its gold mineralization is strictly controlled by fault structure. In this work, lead and sulfur isotope characteristics were studied based on detailed field investigations. The results show that 208Pb/204Pb, 207Pb/204Pb, 206Pb/204Pb ratios of pyrites in the main mineralization stage are in the ranges of 36.789~37.861, 15.383~15.505 and 16.373~17.294, respectively. The μ values vary in 9.36~9.43, 9.38 on average. The Th/U ratios range from 4.04 to 4.17, with an average 4.09. The lead isotope composition suggests that the ore materials might have mainly originated from mantle with crustal contamination. The δ34S values of pyrites vary in the range -9.6‰~-16.6‰, with an average value of -14.85‰. The data indicates strong sulfur isotope fractionation because of the rise in oxygen fugacity of the ore-forming fluid in the mineralization process, which might be the result of the addition of atmospheric water. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
