第三纪济阳盆地大地构造性质及其演化

依据中-小型构造、深部构造、地温场、岩浆活动、沉积建造、地貌和水文特征判断,早第三纪济阳盆地大地构造性质属大陆裂谷,其演化经历了前裂谷期裂谷孕育、裂谷期初始扩张裂陷—强烈扩张裂陷—晚期扩张裂陷—衰亡和后裂谷期拗陷漫覆6个阶段,晚第三纪为拗陷盆地.

THE NATURE OF GEOTECTONICS AND ITS EVOLUTION DURING THE TERTIARY PERIOD IN THE JIYANG BASIN, SHANDONG PROVINCE

Based on the synthetical studies of the mid-little type structures, deep-seated structures, geothermal fields, magmatic activities, sedimentary constructions, paleogeomorphic and paleohydrographic features, it is considered that Jiyang basin belonged to a continental rift-though during Early Tertiary and transferred into depressional basin in Late Tertiary. The evolution of the rift had gone through six stages including pregnant at pre-rift time, spreading and faulting-down in rift time from beginning to, intensively to lately, disappearing, and depression-overlapping in later rift period.