浙江云和-景宁地区磨石山群火山岩稀土元素地球化学特征

REE GEOCHEMISTRY OF THE MOSHISHAN GROUP VOLCANIC ROCKS IN YUNHE JINGNING AREAS,ZHEJIANG

浙东南地区分布巨厚的中生代磨石山群英安质—流纹质火山岩系。在云和—景宁地区，该套火山岩稀土元素具明显旋回性变化，系岩浆两幕演化的结果，这从微观方面给火山旋回的划分提供了新的依据。

Great thick volcanic rocks of Moshishan Group formed in Mesozoic era are expensively distributed in the southern Zhejiang Province. In the Yunhe Jingning areas, the REE in the rocks appears cyclic changes, which result from two episods of the magmatic evolution . Such characteristics of the REE give us another provision for dividing the volcanic cycles.