博罗霍洛山北坡海西期控矿花岗岩成因类型  

GENETIC TYPES OF THE VARISCAN DEPOSIT- CONTROLLING GRANITES IN NORTHERN BOLUOHUOLUO MOUNTAIN

作　　者：王崇礼[1] 隗合明[1] 孙继东[1] 王全庆[1] 于凤池[1] 

机构地区：[1]西安地质学院地勘系,710054

出　　处：《西安地质学院学报》1993年第4期74-79,共6页

基　　金：国家305项目资助

摘　　要：该区海西期控矿花岗岩分属两大碰撞期的两次侵位,据岩石化学、微量元素及稀土元素所提供的成因信息,每一碰撞期均以同构造碰撞带深熔Ⅰ型斜长花岗岩或花岗闪长岩小侵入体为先导,当碰撞高峰过后在造山晚期,才有S型二长花岗岩和花岗闪长岩岩基就位,无论是Ⅰ型还是S型均为壳源成因。Deposit-controlling granites of Northern Boluohuoluo Mountain belong to the products of two periods of intrusion correlated with two period of collision. Petrochemistry, trace elements and rare earth elements indicate that I-type of plagioclase granites or small granitoids were formed at the beginning of every period of collision , S-type of monzogranites and granitoid batholiths were formed after peak period of collision. I-type of porphyritic plagioclase granite bodies and small granitoid body swarm are important for deposit surveying.

关 键 词：天山 花岗岩 岩石化学 成因 

分 类 号：P588.121[天文地球—岩石学]