DISCUSSION OF THE DOWN-WARPED SETTING BASIN:TAKING CHAIDAMU BASIN AS AN EXAMPLE
关于压陷型沉降拗陷盆地的讨论――以柴达木盆地为例

Based on the geological and geophysical datum, we considered that the Menozoic-Cenozoic basin-prototype of Chaidamu basin was the down-warped settling basin. From Menozoic era to early Cenozoic era(E_(1)and E_(2)) the separate fault block was very evident in west of the basin ,but in north there were a lot of setting basins. During the middle-later Ximalaya tectonic movement the Qinghai-Tibet plot pressed severely and thickened greatly the earth crust because of the deformation and overlapping. Because of the dynamic transformation the applied force made the basement of the basin to rise gradually and the center of the sediment and settlement moved from the west to the southeast, which formed the down-warped settling basin which deposit center was Sanhu depression.