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坝索——永和地区位于南盘江中生代早期坳陷的西部。区内三迭系中统安尼锡克阶地层发育,相变剧烈。本文采用岩层厚度、生物含量、颗粒含量、淀晶与泥晶比值、岩石灰阶、原生白云石含量等几种单因素等值线图定量而又清晰的将其岩相特征表现出来,从而将本区从南到北分为台地前缘斜坡相、碳酸盐浅滩相及滩后泻湖相等。而碳酸盐浅滩相又可进一步划分为滩前塌积亚相和浅滩亚相。本文也是小区域大比例尺岩相古地理作图方法的一个尝试。
The Dam-Yonghe area is located in the western part of the Nanpanjiang River in the early Mesozoic Depression. The Triassic Ani Sikh stratum in the Triassic system developed rapidly with a sharp phase change. In this paper, the characteristics of lithofacies are quantitatively and clearly shown by the contour maps of rock thickness, bio-content, grain content, ratio of crystal-to-clay, rock grayscale and primary dolomite, The area is divided into south-north slope of the foreland platform, carbonate shoal facies and lagoon behind the beach equal. The carbonate shoal facies can be further divided into sedimentary subfacies and shallow subfacies. This paper is also an attempt to map a large-scale lithofacies palaeogeography in a small area.