塔里木盆地北缘库车盆地白垩系风成砂岩研究--以库车河剖面为例
Cretaceous eolian sandstones in the Kuqa basin on the northern margin of the Tarim basin: A case study of the Kuqa River section
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摘要: 库车盆地的早白垩世地层为一套干旱气候条件下的红层沉积,包括洪积扇砾岩、间歇性河流砂砾岩、风成细砂岩和粉砂岩、沙漠湖相紫红色泥岩等类型的沉积,组成一个较为典型的沙漠沉积体系。在库车河剖面,下白垩统红层中发育一些厚层至块状的“高能细砂岩和高能粉砂岩”,多为岩屑长石石英砂岩和长石岩屑石英砂岩。它们以良好的分选性和较高的结构成熟度、较细的粒度、较低的成分成熟度和大型交错层理的发育为特征,显示出较为明显的风成沉积特点。Abstract: The Early Cretaceous strata in the Kuqa basin are represented by red beds formed under arid climatic conditions, including typical red bed deposits such as pluvial-fan conglomerates, intermittent-river sandy conglomerates, eolian fine sandstones and silts
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Key words:
- eolian sandstone /
- Cretaceous /
- Kuqa River section /
- Kuqa basin /
- northern margin of the Tarim basin
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