中国地质2012，Vol.39Issue(2)：414-425,12.
黔南桂中地区二叠纪-中三叠世沉积充填特征及演化过程
Sedimentary filling characteristics and evolution process from Permian to middle Triassic in South Guizhou and Middle Guangxi
摘要
Abstract
Based on identifying the sequence surface and analyzing the sequence stratigraphy of outcrops and well data, this paper regularized the stratigraphic classification of different fades from Permian to middle Triassic in south Guizhou and middle Guangxi. The Permian-middle Triassic strata in the study area can be divided into 2 super sequences and 19 third-order sequences. Taking super sequence system tracts as the mapping units, the authors drew the tectonic-sequence lithofacies paleogeographic map, which shows depositional fades distribution pattern of different stages from Permian to middle Triassic. This paper analyzed the filling processes at three evolution stages from Permian to middle Triassic in the study area, i.e., stage of rift valley basin of passive margin, stage of rift valley basin of back-arc, stage of foreland basin. On such a basis, a model of sedimentary filling and dynamic evolution during the process of relative sea level change was constructed, which shows that the lowstand period was the alternate basin -upheaval stage, the transgression period was the formation stage of alternate platform-basin, and the highstand period was the typical sedimentary pattern of alternate platform-basin during the period of the passive continental margin rift basin and the backarc rift basin from Permian to middle Triassic in south Guizhou and middle Guangxi. From middle Triassic, affected by Indosinian movement, the sedimentary pattern of alternate platform -basin was ended and transformed into the sedimentation of turbidite of foreland basin.关键词
黔南桂中/二叠纪-中三叠世/层序地层/沉积充填/盆地演化Key words
South Guizhou and Middle Guangxi/Permian to middle Triassic/sequence stratigraphy, sedimentary filling/basin evolution分类
天文与地球科学引用本文复制引用
张成弓,陈洪德,林良彪,陈安清..黔南桂中地区二叠纪-中三叠世沉积充填特征及演化过程[J].中国地质,2012,39(2):414-425,12.基金项目
国家自然科学基金重点项目(40739901)资助. （40739901）
