宜州地区裂陷槽盆地早石炭世沉积相古地理研究

Sedimentary facies and paleogeography of the Early Carboniferous in rift trough basin of Yizhou area

宜州地区裂陷槽盆地晚古生代地层是在加里东期褶皱基底上沉降、断陷形成的沉积。从晚泥盆世开始,宜州地区地壳逐渐裂解,形成宜州裂陷槽盆地,早石炭世早期,裂陷槽进一步裂解、向东扩张,与湘桂裂陷槽相通,至早石炭世晚期裂陷槽基本成熟,至中二叠世基本充填闭合。还原宜州裂陷槽早石炭世的演化过程就是还原宜州地区早石炭世的沉积相古地理演化。

The late Paleozoic strata in Yizhou rifted trough basin were formed by subsidence and faulting on the Caledonian fold basement.From the late Devonian,the crust of Yizhou area gradually cracked and formed Yizhou rift trough basin.In the early Early Carboniferous,the rift trough further cracked and expanded eastward,connecting with the Hunan Guangxi rift trough.In the late Early Carboniferous,the rift trough was basically mature,and it was basically filled and closed in the Middle Permian.The evolution process of reducing the Early Carboniferous of Yizhou rift trough is to reduce the sedimentary facies and paleogeography evolution of the Early Carboniferous in Yizhou area.