【摘要】 根据侏罗系砂岩碎屑的岩矿组成及主元素地球化学分析， 认为合肥盆地南部侏罗系物源主要来自大别造山带， 具有明显的陆壳岛弧混杂属性。主要物源类型经历了下—中侏罗统的 “再旋回造山带”类型向上侏罗统 “弧造山带”类型的复杂演变， 期间中侏罗世特别是相当于凤凰台组时期由于强烈的剥离作用， 大别造山带切割的 （ｄｉｓｓｅｃｔｅｄ） 岩浆弧物源已有所暴露。据古地理恢复， 推断侏罗纪合肥盆地南部沉积演化曾受控于挤压动力体制， 极可能与扬子板块进一步陆内俯冲作用有关更多还原

【Abstract】 Based on a research of detrital composition and major element geochemistry of the Jurassic sandstones, it is presented that prominent provenance of the Jurassic sediments, south Hefei basin, comes from the Dabie Mountains and eventually attribute to continent island arc complex properties The main types of provenances experienced a change from the recycled orogen of the low middle Jurasssic to the arc orogen of the upper Jurassic (the Zhougongshan Formation ), in which the dissected magmatic arc provenance is gradually exposed in the Dabie Mountains due to intensive erosion during the middle Jurassic, especially after the Fenghuangtai deposition phase It is deduced that the Jurassic sedimentary evolution of the South Hefei basin was mainly controlled by compressive mechanic system, which most probably related to the northward intracontinental subduction of the Yangtze plate更多还原