基于12个微量元素、10个稀土元素和24个同位素分析结果,作者认为本区钾质火山岩系中超基性岩和极大多数基性岩有接近原生岩浆的成分,岩浆都是地幔岩石低程度部分熔融形成的,其源岩成分为受流体交代的金云母石榴石二辉橄榄岩。综地球化学、地球物理及地质三方面资料分析,论证本区火山活动的构造背景是大陆裂谷。 Based on the results of 12 trace elements, 10 rare earth elements and 24 isotopes, the authors believe that the ultramafic rocks and the vast majority of basic rocks in the potassic volcanic series in this area have compositions close to that of the primary magma. The magmas are all of low mantle rock Part of the melting of the source rock composition of fluid confined by the phlogopite garnet lherzolite. Based on the data of three aspects of geochemistry, geophysics and geology, the tectonic setting of volcanic activity in this area is continental rift.