青海贵南县过马营一带隆务河组为一套典型的浊流沉积，对此套浊积岩的沉积特征进行研究。通过对过马营一带隆务河组浊积岩的岩石组合特征、地层层序及鲍玛层序特征分析，探讨其沉积环境特征，并与典型浊积扇模式对比，建立沉积模型。综合分析认为，隆务河组由下向上的3个段分别位于浊积扇的外扇、中扇、内扇，其中中扇辫状河道发育。此研究对于西秦岭造山带的沉积环境分析及构造演化具有重要的意义。%Longwuhe Formation of Guomaying area in Guinan County of Qinghai Province is a typical set of turbidity current depos⁃its, Previous knowledge of its sedimentary environment is not sufficient. The authors studied turbidite sedimentary characteristics through the analysis of rock assemblage characteristics, sequence stratigraphic sequence and Bouma characteristics of turbidite from Longwuhe Formation of Guomaying area, and discussed the characteristics of sedimentary environment in comparison with typical turbidite fan pattern so as to establish a sedimentary model. Comprehensive analysis shows that the three sections of Longwuhe Forma⁃tion are located in the outer fan, middle fan, and inner fan of turbidite fan in upward succession. A lot of watercourses are developed in the middle fan. The study of the sedimentary environment and tectonic evolution has the vital significance for the investigation of the West Qinling orogenic belt.
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