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本文是对贵州距今1400百万年以来地质演化历史的一个概述。摘要如下: 1.贵州目前的地质面貌是通过历次板块构造形成的,它的地质演化历史,可分为如下四个阶段: ①蓟县纪阶段(距今1400—1000百万年) 本阶段的地质演化受早期洋底扩张和晚期安第斯型和喜马拉雅型造山运动的控制。由于位于早期大洋两侧的微型大陆的碰撞和随即在碰撞形成的大陆南侧的俯冲,在蓟县纪末,贵州地壳从大洋型转变为过渡型。 ②青白口纪至早古生代阶段(距今1000—375百万年) 本阶段的地质演化受沿不断向洋生长的大陆南缘的俯冲控制。它可以划分为两个亚阶段,第一个亚阶段为青白口纪扬子陆块形成的阶段,第二个为早古生代造山带形成的阶段,本阶段贵州地壳从过渡型转变为大陆型。 从晚古生代以来,大陆地壳经历了共同的发展道路。它们是: ③晚古生代至晚三叠世中期阶段(距今375—189百万年) 本阶段的地质演化受大陆扩张作用的控制,它可以划分为两个亚阶段。第一个亚阶段为晚二叠世早期以前受大陆拉张上隆作用控制的时期,第二个是其后受拉张沉陷作用控制的时期。 ③晚三叠世晚期以来阶段(距今189百万年以来) 本阶段的地质演化受太平洋板块俯冲和印度板块和欧亚板块碰撞的控制,它也可以分为两个亚阶段。第一个亚阶段是渐新世以前受太平洋板?
This article is an overview of the history of geological evolution in Guizhou Province since 1400 million years ago. The summary is as follows: 1. The current geology of Guizhou is formed through the tectonics of the previous plates. Its geological evolution history can be divided into the following four stages: ① The geology of the Jixian Period (1400-1000 million years ago) Evolution was controlled by early ocean floor expansion and the late Andes and Himalayan orogenies. Due to the collision of the micro-continents on both sides of the early ocean and the subduction immediately south of the continent formed by the collision, the Guizhou crust changed from an oceanic type to a transitional type at the end of Ji County. ② Qingbaikouji to early Paleozoic (1000-375 million years ago) The geological evolution of this stage was controlled by the subduction along the southern margin of the continent that continuously grew to the ocean. It can be divided into two sub-stages. The first sub-stage is the stage of the Qingbaikouji-Yangtze block. The second stage is the formation of the Early Paleozoic orogenic belt. During this stage, the Guizhou crust changed from transitional to continental-type. Since the Late Paleozoic, the continental crust has undergone a common path of development. They are: (3) Late Paleozoic to Late Middle Triassic (375-189 million years ago) The geological evolution of this stage was controlled by the continental expansion, which could be divided into two sub-phases. The first sub-stage was controlled by the uplift of the mainland during the early Permian period and the second was the period controlled by the pull-dip and subsidence. ③ Late Late Triassic Stage (189 million years ago) The geological evolution of this stage was controlled by the subduction of the Pacific plate and the collision between the Indian and Eurasian plates. It can also be divided into two sub-stages. The first sub-stage is the Oligocene by the Pacific plate?