贵州晚新生代构造运动的主要特征

The Main Features of Tectonic Movement of Late Cenozoic Era in Guizhou

贵州晚新生代构造运动以隆升活动为主。它是贵州地壳自中—晚三叠世开始的大面积、大幅度的由海变陆,并经由中生代末燕山运动进一步强化的隆升过程的继续和发展,是形成现代贵州高原(山原)地貌的主要动力。从沉积物组成的演变、沉积物变形、剥夷面变形,以及多层状地貌的形成等方面剖析,它的发展过程可以划分出四个时期,即:①中新—上新世时期;②早更新世早期;③早更新世中晚期;④早更新世末至全新世时期。发生于早更新世中晚期的碧痕运动,是贵州地区晚新生代时期最激烈的构造运动。

Tectonic movement of Late Cenozoic Era in Guizhou was mainly uplift,which shows that the crust of the earth in Guizhou continued upwarping since Middle-Late Triassic age. It was the motive force of formation of plateau landform of Guizhou. Based on the analysis of the evolution and deformation of sediments and many levels of landforms and so on, the tectonic movement can be divided into four periods: 1, Miocene Epoch-Pliocene Epoch, 2, early stag e of Early Pleistocene Epoch , 3, middle-late stage of Early pleistocene Epoch, 4, the end of Early Pleistocene-Holocene Epoch. The 'Bihen movement' of Middle-Late pleistocene Epoch was the most strong tectonic movement of Late Cenozoic Era in Guizhou .