【摘要】 本文介绍了甘肃礼县地区碱性超基性火山岩的岩相学、岩石化学、过渡金属元素和稀土元素地球化学特征并探讨了其岩石成因。笔者认为其形成与北北东向张性断裂和板块运动有关。更多还原

【Abstract】 This paper introduces the petrographical, petrochemical, transitional metal elements and REE geochemical characteristics of alkali ultrabasic volcanic rocks from Lixian area, Gansu province and discusses the petrogenesis. Writers suggest that their formation is related to extensional fratures of NNE trend and plate movement.更多还原