摘要
南宁盆地是华南加里东褶皱系， 右江印支褶皱带南部之西大明山－昆仑关隆起带内，早古生代褶皱基底上的新生代断陷盆地。盆地的北缘为控制盆地沉降的盆缘断裂， 南部为盆地的斜坡带。南宁盆地新生代地层沉积时的主要物源来自盆地的两端（北端和西端）， 盆地的南北两侧提供次要物源。两端为远源河流三角洲沉积体系， 北侧盆缘断裂下降盘为扇三角洲体系， 南侧为近源河流三角洲沉积体系。笔者通过野外地质观察资料、盆地地层的岩性特征结合粒度分析资料，说明南宁盆地发育的沉积相特征及沉积演化特征。
The Nanning basin is a Cenozoic fault subsidence basin on the Early Palaeozoic fold basement in the Damingshan--Kunlunguan rise zone west of the south part of Youjiang Indosinian fold zone of the South China Caledonian fold system. There is a fault controlling the basin subsidence along the north margin of the basin and a slope zone in the south part. during the sedimentation of the Cenozoic strata in the Nanning basin, the material came mainly from the north and west ends, secondly from the south and north sides. There are a river delta sedimentary system of a far origin at the 2ends, a fan delta one on the fall block of the fault along the north side and a river delta sedimentary system with a near origin along the south side. The characteristics of sediment facies and sediment evolution of Nanning basin are interpreted according to the field geological observation, lithological characters of the strata in the basin and the grading analysis data.
出处
《云南地质》
1999年第3期266-274,共9页
Yunnan Geology
