Depositional Sequences and Incised Valley in the Naxing Formation of the Early Carboniferous in Yalai, Nyalam, South Tibet
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摘要: 运用层序地层学理论和方法对特提斯喜马拉雅东段南带聂拉木亚来剖面下石炭统纳兴组中下部沉积层序进行了研究，首次识别划分出三个Ⅱ型、三个含深切谷充填的Ⅰ型层序，对各层序特点进行了总结，重点介绍了深切谷特征，还讨论了沉积层序的时代格架、区域性和全球性对比，以及全球性冰川海退事件问题。Abstract: Six sequence named IV 1-IV 4, Chl, Ch2 withan average duration of 1.02. 0 M a canrecog一nized in the mid-lower Naxing Formation of the Lower Carboniferous at Yalai, Nyalam，south Tibet, Inwhich three sequences with type卫basal boundary surface and three with type平could be divided bythe system tract, texture and the relationship of sequence, and all of them are of slow transgression tofast regression. Thei
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Key words:
- glacial sea-level /
- ression event /
- depositional sequence /
- incised valley /
- naxing forma-tion /
- nyalam south tihet /
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