西藏努日东钨铜多金属矿成矿地质特征及找矿方向

评价区位于西藏冈底斯斑岩铜矿带东部南缘,成矿条件优越,已发现多处大中型铜(钨)多金属矿床,矿床类型主要为矽卡岩型、斑岩型复合型等,为探索努日大型钨铜矿床东部的矿床成因及成矿远景,通过本次的调查评价工作,取得了较好的找矿成果,WO3金属资源量达到大型矿床规模;矿区测定了各类岩体、脉岩中的锆石U-Pb年龄,分析成矿流体的特...

Metallogenic geological characteristics and prospecting direction of tungsten-copper polymetallic deposit in Nuri East, Tibet

The evaluation area is located in the southern margin of the Eastern Gangdise porphyry copper belt in Tibet with favorable metallogenic conditions. A number of large and medium-sized copper (tungsten) polymetallic deposits have been discovered. The main deposit types are skarn type, porphyry type and etc. In order to explore the genesis and metallogenic prospect of nuri east deposit, geological investigation and evaluation work has been done and good prospecting results have been obtained. The amount of WO3 metal resources reaches the scale of large-scale deposit; Zircon U-Pb ages of all kinds of rock masses and dikes in the mining area have been determined; the characteristics of metallogenic fluids are studied; Combined with all kinds of geological characteristics in the mining area, it is considered that:(1)The main ore body IW has great prospecting potential in the south-west and north-east sections; (2)Zircon U-Pb age indicates that the diagenetic and metallogenic age of the Nuri East mining area is earlier than the Miocene (12-18 Ma) of the Gangdese main belt, which provides a new understanding of the diagenetic and metallogenic ages of the southern margin of the eastern Gangdese section, and expands the time sequence and space for ore prospecting in this area; (3)The fluid inclusion analysis shows that the ore-forming fluid temperature and salinity of the Nuri East polymetallic deposit are medium-high, and the ore-forming fluid mainly comes from deep magma, which further indicates the direction of deep ore prospecting (porphyry type); (4)The prospecting marks are summarized, which provide a good guidance for the prospecting of skarn and porphyry complex W-Cu polymetallic deposits in the zone.