The analysis of the geochemical and petrologic characteristics features shows that the assemblage of volcanic rocks is the series of middle ocean ridge basalt , ocean island basalt and ocean island andesite basalt , which implies that it is the relic of the ocean crust , i . e . typical ophiolites 通過巖石特征和地球化學(xué)分析,確定了鹽邊群荒田組火山巖組合為洋脊玄武巖、洋島玄武巖、洋島安山玄武巖系列,說明這是洋殼殘片,即典型的蛇綠巖套。