Wu L.,Zhejiang University |
Wu L.,Research Center for Structures in Oil and Gas Bearing Basins |
Xiao A.,Zhejiang University |
Xiao A.,Research Center for Structures in Oil and Gas Bearing Basins |
And 10 more authors.
Terra Nova | Year: 2012
Terra Nova, 24, 387-395, 2012 We analysed provenance of conglomerate in a geological section spanning late Eocene to Pliocene using the gravel-count method in the NW Qaidam Basin, NW China. The result indicates that the clasts were all derived from the Altyn Mountain to the north with a sudden alteration at ca. 15Ma, and supports a two-stage evolution model for the Cenozoic Altyn Tagh Fault (ATF) highlighting the history prior to the initiation of left-slip movement on the ATF. During the first stage of ca. 36-15Ma, the ATF was a basal shear zone confined in the middle - lower crust and created obvious uplift of the Altyn Mountain. During the second stage since ca. 15Ma, the crust beneath the Altyn Mountain was eventually split, and left-slip movement on the ATF then initiated. © 2012 Blackwell Publishing Ltd.