投稿时间：2025-01-15
修订日期：2025-07-02
网络发布日期：2025-08-26
中文摘要:扬子地块西南缘的川滇黔铅锌矿集区是中国重要的铅锌及稀散金属生产基地，黔西北铅锌成矿区是该矿集区的重要组成部分，已有研究证实区内猪拱塘、那雍枝等超大型-大型矿床的闪锌矿中富集锗、镓、镉等多种关键金属，而对于区内方铅矿伴生富集关键金属禀赋特征的研究少有涉及。亮岩矿床位于黔西北铅锌成矿区垭都-莽硐成矿带南段，文章通过电子探针（EPMA）和激光剥蚀电感耦合等离子体质谱（LA-ICPMS）分析发现亮岩矿床的方铅矿中超常富集稀散金属硒（Se），2种方法获得其w(Se)平均含量分别为6500×10-6和3145×10-6，是Se地壳丰度的130 000倍和62 900倍。结合方铅矿元素组合相关性分析，初步确定矿床中Se元素以2种方式类质同象进入方铅矿晶格，分别为Se直接替代方铅矿中的硫（S）和Se与银（Ag）、锑（Sb）一起耦合替代Pb进入方铅矿晶格。文章认为，亮岩铅锌矿床以及黔西北铅锌成矿区具有巨大的稀散金属Se的找矿潜力。
Abstract:The Sichuan-Yunnan-Guizhou Pb-Zn metallogenic province (SYGMP), located on the southwest margin of the Yangtze block, is a significant production base for lead, zinc, and dispersed metals in China. The lead-zinc ore district in northwestern Guizhou is an important part of the SYGMP. Previous studies have proved the enrichment of various critical metals such as germanium, gallium, and cadmium in sphalerite from large-scale Nayongzhi and super-large-scale Zhugongtang Pb-Zn deposits within the area. However, little research has been conducted on the enrichment characteristics of critical metals associated with galena in this region. The Liangyan deposit is located in the southern section of the Yadu-Mangdong metallogenic belt in the northwestern Guizhou. Recently, the dispersed metal element selenium (Se) was found extremely enriched in galena from the Liangyan deposit by electron microprobe (EPMA) and laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). The average contents of Se obtained by the two methods were 6500×10-6 and 3145×10-6, respectively, which is 130 000 times and 62 900 times higher than the crustal abundance of selenium. In addition, based on the analysis of the correlation between the elemental combinations of galena, it was found that there may be two ways for Se entering the galena lattice through isomorphism, namely Se directly replacing sulfur (S) and Se coupling with silver (Ag) and antimony (Sb) to replace lead (Pb) in galena. These findings indicate that the lead-zinc ore district in northwestern Guizhou including Liangyan deposit have enormous potential for the exploration of dispersed metal selenium.
keywords:occurrence of selenium extremely enrichment of selenium Liangyan lead-zinc deposit northwestern Guizhou
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基金项目:本文得到贵州省自然科学基金（编号：黔科合基础-ZK[2023]477）、国家自然科学基金（编号：92162218、42202099）和毕节市关键矿产勘探与开发重点实验室（编号：毕科合〔2024〕21号）项目联合资助
引用文本：
吴涛,黄智龙,叶霖,薛忠喜,向震中,陈军,衮民汕,吴海枝,孟中能.2025.黔西北亮岩铅锌矿床硒超常富集特征及赋存状态初探[J].矿床地质,44(4):721~732WU Tao,HUANG ZhiLong,YE Lin,XUE ZhongXi,XIANG ZhenZhong,CHEN Jun,GUN MinShan,WU HaiZhi,MENG ZhongNeng.2025.Preliminary study on occurrence status and extraordinary enrichment of selenium in Liangyan Pb-Zn deposit, northwestern Guizhou Province[J].Mineral Deposits44(4):721~732
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