摘要：
The Bangong Lake—Nujiang River metallogenic belt is an important copper— polymetallic ore belt in Tibet,and Garqiong is the key skarn—type copper—gold ore deposit in this metallogenic belt. With the means of sampling based on field geological investigation, microscopic examination, SEM observation, X —ray energy spectrum test and analysis, and systematic research on material components of ores, the authors found for the first time rare intermetallic compounds (Ni—Cr—Fe,Cu—Zn), and this was also the first discovery of such intermetallic compounds in the skarn deposit, as there had been no such reports both in China and abroad. These intermetallic compounds are all rare minerals in nature, formed in an unique environment, i.e., a strong reducing environment of hypoxia and low sulfur. The ore—forming elements with metallogenic specialization of mantle—derived magma were found in the skarn—type deposit for the first time, which has important scientific and academic significance for the study of metallogenic theory, ore —forming materials, metall5genic conditions, metallogenic environment and ore genesis.%班公湖—怒江成矿带是西藏自治区重要的铜金多金属成矿带,尕尔穷矿床是该成矿带中重要的矽卡岩型铜金矿床,笔者通过野外地质调查采样、显微镜鉴定、扫描电镜观察和X射线能谱仪测试分析,对矿石物质组分做了系统的研究.首次在矿石中发现了罕见的Ni-Cr-Fe,Cu-Zn互化物,这也是矽卡岩型矿床中首次发现此类矿物,在国内外尚无报道.这些金属互化物均属自然界罕见的矿物种类,其生成条件独特,是在缺氧、低硫的强还原环境中形成.首次在矽卡岩型矿床中发现与幔源岩浆有着成矿专属性的成矿元素,在成矿理论、成矿物质来源、成矿条件、成矿环境、矿床成因等方面具有重要的科学意义.
