In the MORB normalized multi-element variation diagram, multi-element variations show the relative concentration of K, Rb, Ba and Th, evident depletion of Ti, Nb and Ta, and clear negative P anomalies.

• 具强烈富集大离子亲石元素(K、Rb、Ba、Th)的特点,高场强元素Ti、Nb和Ta显示明显负异常,且所有样品均具明显负P异常。