摘要
阿拉伯半岛中部和南部结晶基底之上最早的稳定沉积是前寒武纪晚期至早寒武世的断陷盆地沉积,以碳酸岩、碎屑岩和蒸发岩为特征。寒武系至下二叠统地层由陆源碎屑岩及少量碳酸岩组成。晚二叠世开始广泛海侵。以浅海灰岩为主,沉积范围向南扩展。三叠纪晚期至侏罗纪初期地壳上升剥蚀。侏罗系和白垩系地层以浅海碳酸岩为主,其间晚白垩世土伦期再次受到地壳运动影响。
In centraI and southern Arabia the first sediments overlying crystalline basement were the Late Precambrian to Earlp Cambrian carbonates,clastic and evaporites,which followed by the latest Early Cambrian through Early Permian sandstones and shales.During the Late Permian,a extensive transgression occured so that
the Paleozoic sequence was capped by neritic carbonates with shale intercalations.Towards the south the sedimentary scope extended and the carbonates were pro-gressively replaced,first by shales,then by sandstones.The latest Triassic to the earliest Jurassic was a period of uplift.Movement let to erosion of sediments
of this age.The Jurassic and Cretaceous sequences were mainly characterized by neritic Cabonates.But the disconformity developed between the sequences of Cret-aceous suggests that the region was again subjected to tectonic activity.
出处
《中山大学学报(自然科学版)》
CAS
CSCD
1991年第4期9-17,共9页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金
关键词
阿拉伯半岛
前寒武系
白垩系
地层
Arabian Peninsula
Precambrian-Cretaceous
Stratigraphy
sequences