摘要
伊宁盆地三叠系的岩性、沉积相和孢粉组合特征与准噶尔、吐鲁番和塔里木北缘基本一致。下三叠统上仓房沟群为冲积扇—河流相紫红、灰紫色砂砾岩、泥岩夹砂岩，厚３４０～４７４ｍ；中三叠统克拉玛依组为河流—湖泊相粉砂质泥岩与砂岩旋回沉积，厚５８～１２１ｍ；上三叠统黄山街组和郝家沟组由湖泊相的深灰—黑色泥岩与粉、细砂岩组成，厚１４０～２６３ｍ。
The Yining basin, situated in the central Tianshan orogenic belt, hosts a thickness of more than 700 m of Triassic continental strata. According to the sequence, lithology, sedimentary facies and sporo pollen assemblages of the Triassic section, the Triassic may be divided in ascending order into: (1)the Lower Triassic upper Cangfanggou Group, which consists of fluvial purplish red and grayish purple sandy conglomerate and mudstone with sandstone, 340～474 m thick; (2)the Middle Triassic Karamay Formation, which is composed of fluvial lacustrine silty mudstone and sandstone, 58～121 m thick; (3)the Upper Triassic Huangshanjie Formation and Haojiagou Formation, which are made up of lacustrine dark gray black mudstone and siltstone and fine sandstone, 140～263 m thick.
出处
《中国区域地质》
CSCD
1997年第4期374-378,共5页
Regional Geology of China
关键词
三叠系
地层
孢粉组合
中天山
盆地
新疆
Triassic, stratigraphy, sporopollen assemblage, Yining basin
