凹陷中新生代火山作用强烈，也具有多期性。
The volcanism is strong in Cenozoic and has several periods.
新生代火山岩中的幔源包体可以提供有关上地幔的直接信息。
Mantle xenoliths brought up by Cenozoic volcanic rocks onto the earth surface may provide direct information about the upper mantle beneath the volcanic region.
藏北羌塘火车头山新生代火山岩可区分为钙碱性及碱性两个不同的系列。
The Cenozoic volcanic rocks in Huochetou mountain, North Qiangtang can be divided into two different series.
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