前言矿田位于一个东西复杂构造带某岩体东段。岩体呈东西展布,为多次侵入活动的产物。根据穿插关系和同位素资料,除少量加里东和海西期花岗岩外,由老到新可以划出:中粗粒斑状黑云母花岗岩[γ_5~(2-1)],小斑状二云母花岗岩[γ_5~(2-2)],中粒黑云母花岗岩[γ_5~(2-3)],中细粒二云母花岗岩[γ_5~(3-1)],其平均同位素年龄依次为168、159、153和142百万 Foreword Ore is located in a complex structure with a rock mass east section. The rock mass is distributed as a result of multiple intrusion activities. According to the interspersed relations and isotopic data, except for a small amount of Caledonian and Hercynian granites, from middle to new age, medium-sized coarse-grained biotite granites [γ_5 ~ (2-1)], small platy mica granites [γ_5 ~ (2-2)], medium-sized biotite granites [γ_5 ~ (2-3)], medium-fine granodiorite [γ_5 ~ (3-1)], and their average isotopic ages were 168,159,153 And 142 million