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龙岗火山群位于中朝准地台的东北缘,距离中朝准地台的北界辉龙河——古洞河断裂带大约20公里,是第四纪火山活动的产物。大椅山是该火山群的西部成员之一,它西邻柳河一样子哨地堑,由中心式火山喷出的碱性橄榄玄武岩及其火山碎屑物组成。本文试图通过大椅山基性火山岩中所含超镁铁岩包体的研究来说明本区岩石圈上地幔的特点,上地幔的演化发展及其对浅部地质作用的影响。
The Longgang volcanic group is located on the northeastern margin of the Zhong-Jin quasi-platform and is about 20 kilometers away from the Huilong-Kwu donghe fault zone in the northern boundary of the Sino-Korean quasi platform. It is a product of Quaternary volcanism. Big Chair Mountain is one of the western members of the volcano, west of the Liuhe Whistler Graben, the center of the volcanic eruption of basic olive basalt and its pyroclastic composition. This paper attempts to study the characteristics of the mantle in the lithosphere, the evolution of the upper mantle and its impact on the geology of the shallow facies through the study of ultramafic inclusions in the basement volcanic rocks in the Chayishan area.