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针对北羌塘盆地布曲组沉积环境的不同认识,根据羌塘盆地形成的地质构造背景、古地貌特征,以及布曲组地层的沉积特征,确证布曲组沉积环境属缓坡沉积。在此基础上,对布曲组标准剖面野外露头进行详细观察与描述,并根据剖面岩相及其组合特征,识别出内缓坡、中缓坡、外缓坡3种沉积亚相,包括潮坪、泻湖、浅滩等7种微相。由此建立了该时期的沉积相序及其演化。
According to different understanding of sedimentary environment of Buqu Formation in North Qiangtang Basin, it is confirmed that the sedimentary environment of Buqu Formation belongs to gentle slope sediment according to the geological structure, palaeogeomorphology and sedimentary characteristics of Buqu formation. On this basis, the outcrops of Buqu Formation standard profile are observed and described in detail. Based on the lithofacies and their assemblage characteristics, three sedimentary subfacies, including tidal flat, lagoon , Shallows and other 7 kinds of micro-phase. The sedimentary facies and evolution of this period have been established.