金川—过铝多阶段花岗岩体演化特征及其与成矿关系

可尔因岩体自前锋石英闪长岩-二长花岗岩-钾长花岗岩-二云母花岗岩-花岗伟晶岩,分布于同一复式背斜内,并具有时空的、多阶段的、连续系列演化特点。在岩石化学等方面是过铝、高碱质、富挥发组分F和稀有元素Li,Be等,并向晚阶段岩石富集。含矿岩体位于“岩浆树”顶端-二云母花岗岩-花岗伟晶岩带。伟晶岩围绕主岩体成群、带状分布。岩体成生于印支末期(206Ma)。

EVOLUTION FEATURE AND MINEROGENETIC RELATIONS PERALUMINOUS GRANITES FROM JINCHUAN, WESTERN SICHUAN

Qianfeng guartz diorite-monzonitic granitic-kaligranite-dimicaceous granite-granitic pegmatite of Keeryin body are distributed within the same anticlinorium and have multi-staged, continuously series evolution feature in time and space. As for the geochemical aspect these rocks are peraluminous,highly alkaline and rich in volatile element F and rare elements Li,Be which are concentrated up to the late stage. Ore-bearing rock body is located at the top of "magma tree "within the belt of dimicaceous granite-granitic pegmatite. The pegmatites occur as groups consisting a belt. The rock body was formed in the late stage of Indo-Sinian movement(206Ma).