定量恢复大别造山带侏罗-白垩纪的隆升和剥蚀

以造山带为物源区的周缘盆地中的沉积物记录着物源区的成分特征,保存着造山带的演化历史.根据地层资料,利用质量平衡方法得到大别造山带周缘的合肥盆地、江汉盆地、安庆-潜山盆地和信阳盆地在侏罗-白垩纪的沉积总量为1.685×105km3.大别造山带周缘盆地的平均沉积速率分别为早侏罗世0.407×106 m3/a,中晚侏罗世0....

Quantitative method for reconstructing the Dabie orogenic's uplifting and erosion history during the Jurassic-Cretaceous

The orogenic adjacent basins always record the composition of the source area，and record the evolutionary history of orogenic belts.Based on strata information such as thickness，area and porosity，the paper worked out the sediment accumulation of Hefei Basin，Jianghan Basin，Anqing Qianshan Basin and Xinyang Basin using the mass balance method.The total deposit of the basins during the Jurassic Cretaceous is 1685×105 km3.And the average sedimentation rates of the adjacent basins are：0407×106 m3/a of the Early Jurassic， 0921×106 m3/a of the Middle and Late Jurassic， 2107×106 m3/a of the Early Cretaceous，and 0985×106 m3/a of the Late Cretaceous.Then according to the dynamic balance of orogenic beltes erosion and the basin fill sequences the paper denude back the sediment to the orogenic belt.And figured out the Dabie total thickness of the erosion of the Jurassic Cretaceous is 45 km，furthermore the speeds of average denudation in each phase are 11 mm/ka，25 mm/ka，56 mm/ka，26 mm/ka.Finally based on the balance between the uplift and erosion the paper reconstruct the Dabie orogenic belts uplifting and erosion history during the Jurassic Cretaceous，and the result is basically corresponds to the orgenic evolution of the tectonic pattern