Portal de Periódicos da CAPES

Structure evolution and sedimentary filling of Jiuquan Basin in Mesozoic-Cenozoic period, NW China

2005; Elsevier BV; Linguagem: Inglês

2096-4803

Zhou Zaihua,

Geological formations and processes

Jiuquan Basin has experienced two major tectonic cycles that are stages of the expanding rifting in the Early Cretaceous and the compressing depression in Tertiary, which means the basin was developed by the evolution phase of rifted basin in the early Cretaceous and the evolution phase of the foreland basin in Cenozoic. From the Middle to Late Mesozoic Period, jiuquan Basin was in the expanding and splitting environment, however, the basin was in the compression and convergent environment in Cenozoic period. Therefore, the sedimentary cap formations have bilayer structure of superposed sag and depression from Mesozoic to Cenozoic. In the Early Cretaceous, Jiuquan Basin experienced three evolution stages, which are the halfgraben-like depression, the expanding depression and the dished depression. From Late Tertiary, the Late Mesozoic rift-subsidence basin has been dismembered and transformed by the fierce thrusting and shearing action.