与攀西裂谷碱性杂岩有关的成矿系列

在攀西地区,自海西期以来出现两套与大陆裂谷作用有关的岩浆岩共生组合,即基性岩套与碱（酸）性岩套。与基性岩套有成因联系和紧密伴生的印支期碱性正长伟晶岩脉和碱性花岗伟晶岩脉等,普遍具稀有、稀土和铀钍矿化,有的已形成中小型铌钽矿床:碱（酸）性岩套以超基性碱性岩、碱性花岗岩为代表,并具与碱性花岗岩有关的稀有、稀土矿床和铀钍矿化。本文对上述碱性杂岩有关的成矿系列,划分了矿床成因类型,并对主要控制因素作了较为详细的探讨。

THE METALLOGENETIC SERIES FOR ALKALIC COMPLEXES IN PANZHIHUA-XICHANG RIFT

In the Panzhihua-Xichang area, southwestern Sichuan, there are two suits of rifting-related magmatic associations, i. e. basic rock arid alkalic ( acidic ) rock associations, ranging from Hercynian to post-Hercynian in age. The former is represented by layered basic/ ultrabasic rock bodies with Panzhihua-type V- and Ti-bearing magnetite deposits, and Emeishan Basalts. Also, they are closely associated with Indosinian alkalic syenites, alkalic syenite-pegmatite dykes and alkalic granitic pegmatite dykes, in which metallizations of rare, rare earth, U and Th metals have occurred, some medium-small scale Nb-Ta deposits are formed. The latter is characterized by alValic/ultrabasic rocks, ijolite-syenites and alkalic granites. Rare and rare earth metal deposits and metallization of U and Th are associated with the alkalic granites. This paper deals only with types of ore deposit metallization and metallogenetic series for the alkalic complex in this area.