摘要
详细描述了分别位于桂西的北、中、南部的几个晚古生代地层剖面 ,据此建立桂西晚古生代深水沉积的地层序列 ,其岩石地层单位自下而上可归入广西原有的平恩组、罗富组、榴江组、五指山组、鹿寨组、巴平组、南丹组、四大寨组和领薅组。和这些单位的命名剖面比较 ,桂西腹地的同期地层具有更典型的深水相沉积 ,并含大量玄武岩 ,构成从早泥盆世晚期到晚二叠世末的连续深水沉积。桂西晚古生代为广海远洋环境 ,其中孤立碳酸盐台地上泥盆 石炭系灰岩中出现的二叠纪“化石脉” ,是古特提斯张裂作用的结果。
The Late Paleozoic sections in northern, central and southern parts of West Guangxi were described in detail respectively. Based on these data the Late Paleozoic stratigaphic successions of deep water sediments in west Guangxi were established. The successions could be divided and attributed to nine lithostratigraphic units. They were, in ascending order, the Ping'en, Luofu, Liujiang, Wuzhishan, Luzhai, Baping, Nandan, Sidazhai and Linghao Formations. Most of them were originally named in the border area of Guangxi and Guizhou, and northeastern Guangxi. Comparing with those in their named localities, the strata in hinterland of west Guangxi were of more typical deep water facies and contained a lot of basalts. Continual deep water sediments from later Early Devonian to Late Permian extended in wide areas of west Guangxi, indicating a pelagic environment. The Late Paleozoic shallow marine sediments in west Guangxi were formed on some isolated carbonate platforms. The Permian carbonate deposits on platforms formed a series of 'dikes' within Devonian Carboniferous limestones, which might be resulted from the rifting of the Paleo Tethys.
出处
《地质科学》
CAS
CSCD
北大核心
2002年第2期152-164,共13页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金 (批准号 :4 96 72 0 91 )
