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岩浆岩的化学成分特别是微量元素的含量及分布特征反映了其物质来源和大地构造背景。本文通过对中生代—新生代二连盆地北部典型火山岩样品的分析和结果处理 ,认为中生代的火山岩以碱性系列为主 ,轻稀土元素相对富集 ,产生于大陆板块环境 ;新生代火山岩的岩浆来源较深 ,形成于大陆裂谷环境。这对二连盆地的形成及演化研究提供了基础资料。
The chemical composition of magmatic rocks, especially trace elements and their distribution characteristics reflect the source of their material and tectonic setting. Based on the analysis and result processing of the typical volcanic rocks in the northern part of Mesozoic-Cenozoic Erlian basin, the paper considers that the Mesozoic volcanic rocks are mainly alkaline series and light rare earth elements are relatively enriched, resulting in the continental plate environment. The magmatic source of the Cenozoic volcanic rocks Deep, formed in the continental rift environment. This provides the basic information for the study of the formation and evolution of the Erlian Basin.