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祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究[J]. 沉积学报, 2013, 31(2): 248-258.
引用本文: 祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究[J]. 沉积学报, 2013, 31(2): 248-258.
Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China[J]. Acta Sedimentologica Sinica, 2013, 31(2): 248-258.
Citation: Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China[J]. Acta Sedimentologica Sinica, 2013, 31(2): 248-258.

祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

详细信息
  • 中图分类号:  P512.2 

Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

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出版历程
  • 刊出日期:  2013-04-10

目录

    祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

    • 中图分类号:  P512.2 

    摘要: 祁连山北缘旱峡地区发育完整的下白垩统下沟组—中沟组沉积序列;以陆源碎屑岩为主,发育砾岩、砂岩、钙质粉砂岩和页岩等;其中砾石分选差、磨圆一般、成分以灰白色砂岩为主,砂岩成分、结构成熟度中等—差。岩石组合、沉积序列和综合沉积特征研究表明,下沟组和中沟组主要由湖泊、扇三角洲、河流等3种类型沉积相、亚相与微相类型组成,发育了一系列重力流成因的沉积类型;湖泊沉积主要发育在下沟组底部和中沟组,扇三角洲沉积分布在下沟组中—上部,中沟组发育河流沉积。研究区早白垩世中期古流向以EN向为主,早白垩世晚期以W向为主,表明沉积沉降中心也由早期的旱峡西移至研究区西南侧。在综合分析的基础上,建立了研究区下白垩统下沟组—中沟组沉积相模式。

    English Abstract

    祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究[J]. 沉积学报, 2013, 31(2): 248-258.
    引用本文: 祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究[J]. 沉积学报, 2013, 31(2): 248-258.
    Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China[J]. Acta Sedimentologica Sinica, 2013, 31(2): 248-258.
    Citation: Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China[J]. Acta Sedimentologica Sinica, 2013, 31(2): 248-258.

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