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出露于中天山马鞍桥、巴仑台北的石炭纪地层属于大塘阶晚期至威宁期碳酸盐和碎屑岩的混合沉积。沉积特征和微量元素标志显示该套地层主体为潮坪—泻湖相沉积 ,仅顶部为河湖相沉积。砂岩的元素地球化学特征以及骨架颗粒的百分含量均显示 ,该套地层的蚀源区为岛弧火山岩系和中酸性花岗岩系的中天山微板块。有足够的证据表明该套地层形成于中天山微板块与南天山弧后盆地碰撞的挤压背景 ,即前陆盆地中 ,构造和海平面变化是该套充填物的主要控制因素
Exposed to the saddle bridge in the Tianshan Mountains, the Carboniferous strata in the northern part of Bangalore belong to the mixed deposition of carbonate and clastic rocks from the Late Datang Stage to the Weining period. Sedimentary characteristics and trace elements indicate that the main body of this set of strata is tidal flat-lacustrine facies, only the top of which is lacustrine facies sedimentation. The elemental geochemical characteristics of sandstone and the percentages of the skeleton particles show that the eclogite source areas of this set of strata are Zhongtian Mountain microplate of the island arc volcanic series and the intermediate-acid granitic series. There is sufficient evidence that the formation formed in the crustal background of the collision between the Zhongtianshan plate and the southern Tianshan backarc basin. That is, the change of tectonic and sea level in the foreland basin is the main controlling factor of this set of fillings