凡河地区火山岩形成于大陆克拉通内的活动带，即裂陷槽强烈活动阶段的产物。
Volcanic rocks in Fanhe occurred in the belt of hedreocraton which was the product during strong activity of aulacogen.
华北克拉通区是世界大陆克拉通地壳的组成部分，与世界各大陆克拉通演化有很好的可对比性，在前寒武纪超级大陆重建中有一定位置。
The early crustal evolution of North China craton can be well correlated with other continents, and its tectonic position within the Precambrian Supercontinet should be reconstructed.
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