摘要
火成岩中的麻粒岩相捕虏体主要成分基性熔体捕虏体、酸性变质火成岩捕虏体与变质沉积岩捕虏体。麻粒岩相捕虏体的锆石离子探针年龄与上地壳花岗岩的侵位年龄、造山运动时代基本一致。基性熔体的下垫作用是地壳生长的一种重要方式，并且代表了一种有效的幔向壳的物质与能量迁移。下地壳部分熔融与麻粒岩相变质作用是壳内分异的重要途径。
Granulitic-facies xenoliths,scavenged in igneous rocks,comprise mainly of basicmelt xenoliths,acidic meta-igneous xenoliths and metasedimentary xenoliths.The xenoliths have been dated using zircon microprobe dating method,suggesting that the xenoliths were formed approximately simultaneously with granite emplacement and orogeny in the upper crust.Underplating of basic melt beneath the crust is one of the most important patterns of crust growth and represents an effective material and energy transfer from the mantle to the crust.Partial fusion and granulitic facies metamorphism in the lower crust are important models for intracrustal differentiation.
出处
《地质科技情报》
CAS
CSCD
北大核心
1994年第2期1-4,共4页
Geological Science and Technology Information
基金
中国科学院教育局择优支持项目
关键词
火成岩
麻粒岩
岩相捕虏体
地壳
granulitic-facies xenoliths,underplating,material and energy transfer, intracrustal differentiation,crustal growth
