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江西大湖塘钨矿床是近年发现的多类型矿化紧密共生的超大型岩浆热液型钨矿床。本团队在大湖塘平苗矿段地表考察花岗斑岩脉时,首次发现多条岩脉中发育黑钨矿-石英细脉,见大量细粒针状黑钨矿。矿脉仅局限在岩体中,未进入围岩中。LA-ICP-MS对该花岗斑岩锆石U-Pb定年,一组206Pb/238U加权平均年龄为149.1±1.1 Ma,为花岗斑岩年龄;另一组为890 Ma左右,为同化混染晋宁期围岩导致。
The Dahuotang tungsten deposit in Jiangxi is a very large magmatic hydrothermal tungsten deposit discovered in recent years with many types of mineralization closely intergrowth. When the team investigated the granite porphyry vein on the surface of the Pingmiao section of Dahu Tong, it was the first time that wolframite-quartz veinlets were found in a number of dikes. A lot of fine needle-shaped wolframite was found. The veins are confined to the rock mass and not into the surrounding rock. LA-ICP-MS zircon U-Pb dating of this granite porphyry, with a set of 206Pb / 238U weighted average age of 149.1 ± 1.1 Ma, is granite porphyry age; the other group is about 890 Ma, for the assimilation Dyeing Jinning surrounding rock lead.