关键词: 北大别, 榴辉岩, 大洋拉斑玄武岩, 扬子板块

Abstract:

In the eclogite from Raobazai ,Na 2O and K 2O are negative.They display MORB-normalized trace element diagrams characterized by partial LILE(Rb、Ba) positive anomalies, with no significant other elements fractionation, and without significant Nb and Ta anomalies. In the chondrite-normalized REE pattern, they show LREE depleted to slight enriched, without Eu anomaly. All of these indicate the original rocks may be oceanic tholeiitic basalt. The northern part of Northern Dabie Mountains may represent the

Key words: Northern Dabie, Eclogite, Oceanic tholeiitic basalt, Yangtze craton