东吴运动的新认识

本文根据地层缺失、接触关系及火山活动等特征,将华南地区的东吴运动划分为4幕:（1）第一幕,波及江南古陆与秦淮古陆之间,发生于早二叠世隆林期末,以缺失隆林期的沉积为特征,属升降运动;（2）第二幕,波及四川、贵州和云南,发生于早二叠世茅口期Yabeina阶段,表现为峨眉山玄武岩的喷发,属火山喷发及裂谷性质;（3）第三幕,见于福建龙岩、广东花县及恩（平）开（平）台（山）地区,上、下二叠统之间具砾岩或火山凝灰岩,发生于早二叠世茅口期末,属升降运动性质,（4）第四幕,以广西钦州地区最明显,长兴期地层不整合在不同时代老地层之上,发生于吴家坪期末,以褶皱运动为主。

NEW KNOWLEDGE ON DONGU MOVEMENT

During the permian the Dongwu Movement was an important crustal movement in South China. The character, influeceing range and occuring time of it are different in various localities. Based on the development and relationship of strata as well as on the volcanicity the Dongwu Movement may be divided into four structural episodes as following: 1. The first structural episode: It was a vertical movement between the Jiangnan and Qinling-Huaiyang Ancient lands in Latest Longlinian of Early permian. There the Longlinian strata was lacking or denuded. 2. The second structural episode. In Yabeina Age of Maokouian, Early Permian, there were rifts and volcanic activities in Sichuan, Yunnan and Guizhou province. It was represented by the eruption of Emeishan Basalt. 3. The third structural episode: It was a vertical movement during the Latest Maokouian of Early Permian in Longyan, Fujian Province and in Huaxian-Enping, Kaiping and Taishan, Guangdong Province. There occur conglomerate and tuff between the Lower and Upper Permian. 4. The fourth structural episode: It showed mainly as folding movement during the Early Late Permian. The changxinian strata overlied unconformably on different old strata. This is well shown in Qinzhou of Guangxi Province.