网络发布日期：2022-01-11
中文摘要:分布于扬子地块东南缘的湘西铅锌成矿区是中国重要的铅锌生产基地,累计探明铅锌资源量超过2000万t。近年来,随着区内多个大型-超大型铅锌矿床相继被发现,其成矿特征和找矿工作也受到地质工作者的关注。唐家寨矿床是分布于湘西洛塔矿田中的一个大型铅锌矿床,文章通过电子探针(EPMA)和激光剥蚀等离子质谱(LA-ICPMS)发现唐家寨矿床闪锌矿中显著富集关键金属元素镓(Ga),2种方法获得平均w(Ga)分别为1320×10-6和928×10-6,其富集程度之高全球罕见。另外,结合LA-ICPMS Mapping分析发现,唐家寨矿床中的Ga元素主要与Cu元素一起耦合替代Zn元素进入闪锌矿晶格之中。上述这些发现表明,唐家寨铅锌矿床及其外围具有巨大的镓等战略性关键金属资源的找矿潜力。
Abstract:The western Hunan lead-zinc metallogenic area, located in the southeast margin of the Yangtze block, is a significant Pb-Zn production base in China, with a cumulative proven metal resource of more than 20 million tons. In view of several large to super-large Pb-Zn deposits discovered in recent years, a great number of geologists pay attention to their mineralization and prospecting. The Tangjiazhai deposit is a large scale lead-zinc deposit in the Luota orefield of the western Hunan. Recently, the critical metal element gallium(Ga) was found extremely enriched in sphalerite of the Tangjiazhai deposit by electron microprobe(EPMA) and laser ablation plasma mass spectrometry(LA-ICPMS). The average content of Ga obtained by the two methods was 1320×10-6 and 928×10-6, respectively, which is rare in the world. In addition, the LA-ICPMS Mapping analysis indicating that Ga is mainly coupled with Cu to replace Zn into sphalerite lattice. These findings show great prospecting potential for strategic critical metal gallium resources in the Tangjiazhai Pb-Zn deposit and its periphery.
keywords:geochemistry critical metal gallium extremely enriched Tangjiazhai Pb-Zn deposit western Hunan
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基金项目:国家自然科学基金项目(编号:U1812402、42172082)、中国博士后科学基金(编号:2021M703190)联合资助
引用文本：
吴涛,黄智龙,叶霖,周家喜,韦晨,胡宇思,向震中.2021.湘西发现镓超常富集铅锌矿床[J].矿床地质,40(6):1357~1362WU Tao,HUANG Zhi-long,YE Lin,ZHOU Jia-xi,WEI Chen,HU Yu-si,XIANG Zhen-zhong.2021.Discovery of Ga extremely enriched Pb-Zn deposit in western Hunan[J].Mineral Deposits40(6):1357~1362
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