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小库孜拜剖面位于塔里木盆地库车坳陷西部,是库车坳陷海相古近系的代表性剖面。通过对该剖面36块样品钙质超微化石的分析和研究,在4个样品中发现了稀少的钙质超微化石,共鉴定2属4种及1个未定种,分别为Micrantholithus attenuatus,M.crenulatus,M.sp.,Braarudosphaera bigelowii和B.discula等。化石组合的显著特征是属种单调,丰度和分异度都极低。标本受到严重溶蚀,保存状态较差。根据化石组合特征及标志化石的分布时代,推测含化石的地层时代为晚古新世至早始新世。所见化石属种均为浅海近岸钙质超微组合的重要分子,认为该时期小库孜拜一带的古环境处于海湾近岸地带。
The small Kuzibai section is located in the west of the Kuqa Depression in the Tarim Basin, and is a representative section of the marine Paleogene in the Kuqa Depression. Through the analysis and study of 36 samples of calcareous nannofossils in this section, rare calcareous nanofossils were found in 4 samples, 4 genera and 2 species were identified in 2 genera, which were Micrantholithus attenuatus, M Crenulatus, M.sp., Braarudosphaera bigelowii and B.discula et al. The distinguishing feature of the fossil assemblage is monotonous species, with very low abundance and diversity. Specimens were severely eroded and poorly preserved. According to the characteristics of fossil assemblages and the distribution age of the fossils, it is presumed that the age of fossil-bearing strata is Late Paleocene to early Eocene. All the fossilized species were found to be important molecules in the ultra-fine combination of calcareous nearshore near the coast, suggesting that the paleoenvironment of the small Kuzebi in this period was in the nearshore area of the Gulf.