摘要
在总结云南白马寨镍矿区煌斑岩成因信息的基础上,利用岩石学混合计算方法对其地幔源区成分进行了模拟,进而讨论矿区这类岩石的成因。地球化学和模拟计算均表明,白马寨镍矿区煌斑岩来源于交代富集地幔,板块俯冲(印度板块向欧亚板块俯冲)过程中富含ALK、LREE及不相容元素的海底沉积物被带入地幔脱水形成的流体是引起本区地幔交代作用的主要因素。
Based on the genetic information about the Baimazhai nickel deposit, Yunnan Province, we modeled the composition of the mantle source region by way of petrological mixing calculation, and further discussed the genesis of this type of rocks. Both element geochemistry data and mixing calculation showed that lamprophyres in the Baimazhai nickel deposit were derived from a metasomatism-enrichment mantle and the fluids resulted from dehydration of a subducted slab which is comprised of ALK, LREE and incompatible element-rich seafloor sediments
出处
《矿物学报》
CAS
CSCD
北大核心
2004年第1期14-18,共5页
Acta Mineralogica Sinica
基金
国家自然科学基金资助项目(批准号:49972073
40242013)
关键词
地球化学
地幔交代作用
源区成分
云南
镍矿
Baimazhai nickel deposit
lamprophyre
composition ofmantle source region
mantle metasomatism
