新疆北山南部地区石炭-二叠纪岩石地层单位厘定及沉积环境分析

Analysis of Sedimentary Environment and Ascertainment of Carboniferous-Permian Lithostratigraphic Unit in South Area of Beishan, Xinjiang

石炭-二叠纪地层在新疆北山南部地区分布较为广泛,总体为浅变质强变形的一套岩石,经重新厘定从老到新岩石地层单位有:早石炭世红柳园组,晚石炭世石板山组、胜利泉组和干泉组;早二叠世红柳河组,中二叠世骆驼沟组。其沉积环境经历了滨浅海相→浅海相、半深海相→海陆交互相,为两个较为完整的沉积旋回,沉积物颜色为紫红色夹灰绿色,陆源碎屑为成熟度较低的石英和长石,显示了氧化条件、近源、快速堆积特征,反映为陆内裂谷盆地性质。

Carboniferous-Permian strata distribute widely in south area of Beishan, Xinjiang, which is a suit of slight alterative and strong deformation rock in the mass. The lithostratigraphic unit from old to youth by ascertainment over again as follow： Early Carboniferous Hongliuyuan Formation, Late Carboniferous Shibanshan Formation, Shengliquan Formation and Ganquan Formation, Early Permian Hongliuhe Formation, Middle Permian Luotuogou Formation. Their sedimentary environments go through from seashore facies to shallow sea facies and from blue water facies to alternant sea-and-land facies. They are two quite integrated sedimentary gyration. The color of the sediment is that the mauve inserts the grayish green and the source piece in the land is the quartz and feldspar for low maturity, which displayed the deposit characteristic of oxidation, anear sourse and celerity, reflected the basin nature of the rift valley in the land.