Environmental isotope characteristics and groundwater recharge in groundwater level rise area in Zhangye City

Based on the geometry of the alluvial fan and the erosional features on the top of Maokou Formation, it is suggested that the magnitude of crustal uplift prior to the.

The biostratigraphic comparison and sedimentological features of the Maokou limestone in SW China demonstrate that differential erosion and crustal uplift were developed prior to eruption of the Emeishan flood basalts.

The abnormally low pressure caused by temperature falling,sandstone rebounding and regional fluid flow due to imbalance erosion during the process of strata uplift and erosion,provides energy for the oil and gas to migrate and accumulate,the sandstone rebounding due to strata erosion offers more pore spaces for oil and gas accumulation,and the physical experiment shows that the amount .