【摘要】 广西丹池盆地(即南丹—河池盆地)为晚古生代与金沙江—红河—马江古特提斯洋共生的大陆边缘裂谷盆地,盆地从早泥盆世晚期开始裂陷,与相邻地区形成条块分割的深水裂陷槽(条)和孤立台地(块)间列的局面。该盆地于三叠纪随着金沙江—红河—马江古特提斯洋的闭合而逐渐萎缩,消亡。在丹池裂陷盆地形成、演化过程中,形成一系列典型的震积岩及与地震相关的滑塌构造。地震形成的沉积构造包括沉积岩墙、地裂缝、沉积岩脉、微褶皱、负荷构造、火焰构造、滑塌构造(滑塌不整合、滑塌褶皱、角砾岩化)等。丹池盆地的震积岩反映晚古生代处于强烈的伸展活动期,震积岩及其伴生的滑塌构造序列反映盆地的幕式构造活动。更多还原

【Abstract】 The Paleozoic Danchi (Nandan—Hechi) basin ,Guangxi Zhuang Autonoumous Region,is a continental margin rift basin associated with paleo-Tethys ocean along Jinsha River, Honghe River, Majiang River. The Danchi basin initiated from the rifting during the Early Devonian, and formed deep-water rift trough and isolated platform in Guilin and its adjacent area. The basin withers and dies out with the close of Jinsha River—Honghe River—Majiang River Ocean. During forming and evolutional process of the rift basin formed a series seismic and slump structures associated with earthquake. Sedimentary structures associated with seismites include sedimentary dykes, crack, sedimentary veins, microfolds, load structures, flame structures, slump structures (slump unconformity, slump folds, slump brecciation) and so on. The seismites of the Danchi basin reflect intense extension of the Danchi basin during the Late Paleozoic, and the sequences of seismites and related slump structure implicate episodic tectonic activity of the Danchi basin.更多还原