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在层序地层学研究的基础上,对柴达木盆地红柳泉-跃东地区第三系中新统上干柴沟组进行了详细的沉积相分析,揭示了上干柴沟组发育的冲积扇相、扇三角洲相、辫状河三角洲相、湖泊相、浊积相等几种类型沉积相的特征。以识别出的三个三级层序为单位,详细分析了层序格架内沉积相的平面展布特征,总结了由于构造抬升造成的上干柴沟组湖盆演化及沉积中心东迁的规律。结合物源、构造、气候等因素分析了沉积相展布的控制因素。
Based on the study of sequence stratigraphy, a detailed sedimentary facies analysis of the Miocene Shangganchaiguan Formation in the Hongliuquan-Yuedong area of the Qaidam Basin has been carried out to reveal the alluvial deposits in the Shangganchaigou Formation Fan facies, fan delta facies, braided delta facies, lacustrine facies, and turbidimetric facies. Based on the identified three third-level sequences, the plane distribution characteristics of sedimentary facies in the sequence framework are analyzed in detail, and the evolution of the Upper Ganchaigou Formation and the eastward depositional center due to the tectonic uplift are summarized law. According to the provenance, structure and climate, the controlling factors of sedimentary facies distribution are analyzed.