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早中三叠世贵州贵阳贞丰地区构造上位于南盘江盆地西北缘,其深水碳酸盐斜坡沉积作用由原地碳酸盐和异地碳酸盐组成。其中,异地碳酸盐有碎屑流、变密度颗粒流、浊流和沉积物滑动4种类型。组成了碳酸盐同斜缓坡、沉积型斜坡和跌积型斜坡三种斜坡沉积类型。在早中三叠世全球海平面上升背景下,碳酸盐斜坡沉积主要受构造活动的控制。早三叠世,盆地处于被动边缘,碳酸盐斜坡经历了由缓坡到进积型沉积斜坡的发展。中三叠世随着盆地进入到前陆盆地的演化,碳酸盐斜坡受挠曲引张作用影响,发展成后退的跌积型斜坡,并经历了从阶梯状后退到连续后退的演化。
The Early Triassic Junggar area of Guiyang, Guizhou Province is structurally located in the northwestern margin of the Nanpanjiang Basin. Its sedimentary succession of deep-water carbonate slips consists of in situ carbonate and allochthonous carbonate. Among them, there are four types of debris flow, variable density particle flow, turbidity flow and sediment sliding in different places. Composition of the carbonate slope with gentle slope, sedimentary slope and sedimentary slope of three slope sedimentary types. In the early Middle Triassic global sea level rise background, carbonate slope sedimentation is mainly controlled by tectonic activity. In the Early Triassic, the basin was at the passive margin, and the carbonate slope experienced the development from gentle slope to progressive sedimentary slope. As the basin moved into the foreland basin, the carbonate slope was affected by the flexure-extension effect and developed into a receded up-slope type slope, which experienced the evolution from stepped to continuous receding.