The intense fractionation of REE and the obvious depletion of HREE suggest that these volcanic rocks were derived from garnet lherzolite of the mantle in the continental lithosphere.

• 稀土元素的强烈分馏以及重稀土元素显著贫化，意味着这些火山岩源自于大陆岩石圈地幔的石榴石二辉橄榄岩。