基本解释[地球科学]洋岛玄武岩专业释义地球科学洋岛玄武岩The Early Jurassic alkali basalts from the Riajunlama region probably represent the oceanic island basalt within the plate of the Bangong-Nujiang ocean.早侏罗世碱性玄武岩代表了班公湖-怒江洋内的板内洋岛玄武岩。