地质调查与研究Issue(1)：1-9,9.
北部湾盆地涠西南凹陷陡坡带砂体成因类型及其演化
Forming Types and Evolution of Sand Body in Steep Slope Belt of Weixinan Sag, Beibu Gulf Basin
摘要
Abstract
Based on the tectonic sedimentology and sequence stratigraphy, this paper analyzes the forming types and evolution of sand body based on three kinds of structural styles, that is listric style, ramp-flat style and ladder style, and finally gets a conclusion that fans types with different scale and periods were controlled by different structural styles: ①listric style—ramp-flat fault structure in western area: nearshore underwater fan in earlier stage and fan delta—shore-shallow lacustrine—alluvial plain in later stage;②ladder style fault structure in mid-dle part:nearshore underwater fan in earlier stage and shallow lacustrine—fan delta in later stage;③listric style fault structure in eastern area:nearshore underwater fan in earlier stage and alluvial plain—shore-shallow lacus-trine sediments in later stage. The research on evolutional process of depositional system of the steep slope belt shows that sand bodies’distribution was controlled by different systems tracts, too. There are small-scale channel sand bodies and fan bodies in Lowstand System Tract and large fan delta in Highstand System Tract where prove-nance is rich. Fan delta sand bodies is the main direction of subtle reservoir exploration in the future.关键词
涠西南凹陷/陡坡带/构造样式/沉积体系/扇三角洲Key words
Weixinan Sag/steep slope belt/structural style/depositional system/fan delta分类
天文与地球科学引用本文复制引用
谭卓,刘志国,李运振,沈野..北部湾盆地涠西南凹陷陡坡带砂体成因类型及其演化[J].地质调查与研究,2015,(1):1-9,9.基金项目
国家“十二五”科技重大专项亚太地区油气资源评价及未来战略发展方向 （）
