地质与资源2023，Vol.32Issue(6)：681-690,731,11.DOI:10.13686/j.cnki.dzyzy.2023.06.004
论晚新生代成都盆地的沉积充填演化
SEDIMENTARY FILLING EVOLUTION OF CHENGDU BASIN IN LATE CENOZOIC
摘要
Abstract
Chengdu Basin,a continental sedimentary basin between Longmenshan tectonic belt and Longquanshan fold fault belt,is filled with huge thick Late Cenozoic semi-consolidated and loose sediments.Based on the analysis of sedimentary characteristics and filling process of the basin,it is considered that there are twice sedimentary-tectonic transformations and changes in accommodation space during the sedimentary process,which leads to the migration of sedimentary center from the front of Longmenshan thrust tectonic belt to the footwall area of Dayi-Pengzhou fault belt.The sedimentary characteristics show that the basin is mainly alluvial fan and fluvial facies.The Pliocene Dayi conglomerate stage is dominated by alluvial fan facies,distributed only on the west of Pujiang-Xinjin-Chengdu-Deyang line.During the Early-Middle Pleistocene,alluvial fan and fluvial facies deposits are predominant,with the west of Pujiang-Xinjin-Chengdu-Deyang line as the alluvial fan area and the east as the fluvial facies area.The Late Pleistocene-Holocene is mainly fluvial deposits,but the sediment sources and drainage characteristics between the east and west areas are obviously different.The study may provide a basis for 3D geological structure modeling of underground space,potential evaluation of underground space resources,as well as occurrence horizon of mineral and human resources in Chengdu City.关键词
成都盆地/晚新生代/沉积中心/冲积扇相/河流相/地下空间Key words
Chengdu Basin/Late Cenozoic/sedimentary center/alluvial fan facies/fluvial facies/underground space分类
天文与地球科学引用本文复制引用
陈浩,王羽珂,冯兴雷,王东辉,李鹏岳..论晚新生代成都盆地的沉积充填演化[J].地质与资源,2023,32(6):681-690,731,11.基金项目
中国地质调查局项目"三峡库区生态地质调查与综合评价"(DD20221776) （DD20221776）
"重庆市地质安全体检与风险评估示范"(DD20230541). （DD20230541）
