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铜钵庙组是蒙古国塔木察格盆地早白垩世发生初始裂陷的记录。铜钵庙组沉积早期,受强烈起伏的基底地貌和同生正断层活动的双重控制,塔南凹陷主要发育扇三角洲相;铜钵庙组沉积晚期,断裂活动趋于平息,研究区发育扇三角洲相和湖相。笔者系统总结了塔南凹陷铜钵庙组的扇三角洲相和湖相沉积特征,分析了沉积相带的平面展布特征。铜钵庙组沉积时期塔南凹陷出现雏形,沉积中心多且相对孤立,至南屯组沉积时期因同生正断层的进一步活动而连接成北东向条带状延伸的沉降带,盆地向西扩大。
The Tongbomiao Formation is a record of the initial rifting in the Early Cretaceous in the Tammuzag Basin, Mongolia. In the early deposition of Tongbomiao Formation, under the dual control of basal topography and synsedimentary normal fault activity, Tannan Sag mainly developed fan delta facies. In the late deposition of Tongbomiao Formation, the fault activity tended to subside. In the study area, fan delta Phase and lake phase. The author systematically summarizes the sedimentary facies of fan delta facies and lacustrine facies in Tongbomiao Formation of Tanan sag and analyzes the plane distribution characteristics of sedimentary facies belts. During the sedimentary period of Tongbomiao Formation, there were rudiments in the Tha Nan Depression. Most of the sedimentary centers were isolated and relatively isolated. During the sedimentation of Nantun Formation, due to the further normal activity of the Tongshengmiao fault, expand.