摘要
安徽太湖榴辉岩产于太古代片岩和片麻岩中。榴辉岩的石榴子石含镁铝榴石组分20％,绿辉石含硬玉组分约40％,符合C类榴辉岩的化学成分要求。但太湖榴辉岩的形成温压条件为680℃和15×10~3Pa。其退变质形成的榴闪岩的温压条件为580℃和6×10~3Pa,后者可作为发生退变反应的温压下限。
The eclogites of Taihu occur as inclusions in schists and gneisses.They contain garnet with 20 mol.%pyrope component and omphacite with 40mol.% jadeite component, the chemistry is consistent with group C eclogite. The equilibrium temperature-pressure of Taihu's eclogites is 680℃ and 1.5×109Pa,but their further retrograde metamorphic temperature-pressure is 580℃ and 6×108Pa.At this retrograde metamorphism, the mineral transformation of eclogites can be illustreted simply by omphacite+garnet-A→hornblende+garnet-B.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1989年第6期599-606,共8页
Earth Science-Journal of China University of Geosciences
关键词
榴辉岩
标型
石榴子石
辉石
角闪石
typomorphism, garnet, pyroxene, hornblende, eclogite
