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在辽源建安火山群内运用全岩K-Ar测年方法首次获得老道山、双山、毛山及四甲山火山锥体玄武岩的年龄分别为(99.28±1.59)Ma、(91.70±1.67)Ma、(82.55±1.94)Ma、(82.18±2.37)Ma,可确认建安火山群是当前中国东北乃至中国东部规模最大的晚白垩世火山群。这一结果为探讨中国东部晚白垩世时期的构造演化提供了精确的年代学资料,同时,该火山群的形成与寻找无机成因的油气藏具有重要联系,也为该地区蓝宝石矿及伴生宝石矿的初查工作提供了依据。
(99.28 ± 1.59) Ma and (91.70 ± 1.67) Ma, respectively, for the first time in the Ji’an volcanic group in Liaoyuan, using the whole rock K-Ar dating method. (82.55 ± 1.94) Ma, (82.18 ± 2.37) Ma, it can be confirmed that the Jian’an volcano group is the largest Late Cretaceous volcano group in northeastern China and eastern China. This result provides accurate geochronological data for the exploration of the tectonic evolution of the Late Cretaceous in Eastern China. At the same time, the formation of volcanic rocks is closely related to the search for inorganic genesis of oil and gas reservoirs, as well as sapphire ore and associated gem minerals The preliminary investigation provided the basis.