岩石矿物学杂志2001，Vol.20Issue(1)：11-20,10.
大别山铙钹寨被麻粒岩相变质作用改造的变质超镁铁岩体：石榴辉石岩证据
Meta_Ultramafic Block Subjected to Granulite Facies Metamorphism in Raobazhai, the Dabie Mountains: Evidence from Garnet Pyroxenite
摘要
Abstract
The study of garnet pyroxenite reveals that the ultramafic blockin Raobazhai within the Dabie Mountains is of metamorphic origin rather than a slice of primitive mantle. It underwent an evolutional process from spinal_Al_rich pyroxene facies (750℃, 1.1 GPa) through spinal_garnet facies (850℃, 1.5 GPa) to granulite facies (800℃, 0.85 GPa). The metamorphic history of the block is obviously different from that of ultrahigh_pressure complex in the southern Dabie Mountains. It may represent the upper rock of subducting continental crust of the southern Dabie Mountains characterized by a high geothermal gradient. The relationships of the granulitization of Raobazhai and other ultramafic blocks to regional granulite facies metamorphism suggests that the Dabie basement has been thoroughly reformed, and the high_grade metamorphism of the northern Dabie Mountains in Anhui Province is only a mirror of the post_Indosinian granulite facies event.关键词
大别山/铙钹寨/变质超镁铁岩/麻粒岩相/地质差异分类
天文与地球科学引用本文复制引用
孟宪刚,曲玮,刘晓春..大别山铙钹寨被麻粒岩相变质作用改造的变质超镁铁岩体：石榴辉石岩证据[J].岩石矿物学杂志,2001,20(1):11-20,10.基金项目
本文为原地质矿产部青年地质学家基金资助项目成果之一 （）
