短语词组短语magma -basalt 岩浆玄武岩basalt magma 玄武岩浆alkali olivine basalt magma 碱性橄榄玄武岩岩浆alkaline basalt magma 碱性玄武岩浆OIB -type basalt magma 型玄武岩浆 返回 magma basalt