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通化中生代断陷盆地（前人称三源浦盆地）以频繁的沉积作用和火山作用为特征，形成了多旋回的火山—沉积序列，表现为火山爆发相、溢流相与冲积扇相、湖泊相的反复交替，并发育了湖相火山碎屑浊积岩系〔１〕。盆地演化经历了早期非补偿阶段、早期熔浆充填期，火山喷发期后非补偿沉积阶段、晚期熔浆充填期，构成二个大的火山—沉积旋迥。
The Tonghua Mesozoic rift basin (formerly known as the San Yuanpu Basin) is characterized by frequent sedimentation and volcanism, forming multi-cycle volcanic-sedimentary sequences characterized by volcanic eruptions, flood facies and alluvial fan facies, lacustrine facies The alternating alternation and the development of lacustrine volcano clastic turbidite [1]. The basin evolution experienced two phases of early non-compensated phase, early magmatic filling phase, post-volcanic non-compensated sedimentary phase and late magmatic filling phase, forming two large volcanic-sedimentary cycles.