库车前陆冲断带秋里塔格构造带水系形态与褶皱生长
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国家重点基础研究发展计划(973计划)


Drainage Network Development and Fold Growth of Qiulitage Structural Belt in Kuqa Foreland Fold and Thrust Belt
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    摘要:

    水系形态能够非常敏感的记录活动构造的演化过程,尤其对于褶皱横向生长的地区,常形成特征的水系形态。库车前陆冲断带发育平行于南天山造山带走向的褶皱带,并形成特征的水系形态。利用遥感影像、卫星照片、以及从数字高程数据中提取的地貌和水系参数,对库车前陆冲断带秋里塔格构造带水系形态进行分析研究,得出库车前陆冲断带褶皱具有横向生长的演化特征,并识别出判别褶皱生长的5个水系形态标志。这些水系形态标志包括:不对称的水域形态,水系受到阻挡发生弯曲、捕获、并流现象,背斜脊部风口的形成以及高度依次降低排列,不对称的冲积扇体,被纵向河流分隔的两侧背斜的水系形态差异。褶皱的横向生长最终导致相互拼接形成更大规模的褶皱带,秋里塔格构造带正是由多条背斜的横向生长,并拼接而成现今延伸~300km的褶皱带。

    Abstract:

    The drainage network patterns have the potential to sensitively record the process of lateral growth of active structures. The active growth of Kuqa fold and thrust belt in frontal zones of South Tianshan orogenic belt is a prominent topographic feature, extending ~300km in E-W direction. The qualitative analysis of remote sensing data, satellite imagery and digital topography can put insight into the growth, lateral propagation, and interaction of individual fold segments in Kuqa foreland fold and thrust belt. We identify five drainage network indicators of lateral propagation of fold, which are asymmetrical drainage patterns, the diversion and capture of drainage encountering the fault or hogback, formation of wind gaps and the decrease of the height of wind gaps along one direction of the fold ridge, asymmetrical fluvial fan body, and total distinction of drainage network patterns on the two sides of transverse river. The linkage of folds, which is the result of lateral propagation of folds, forms the more spectacular Qiulitage fold belt.

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贺电,李江海.2009.库车前陆冲断带秋里塔格构造带水系形态与褶皱生长[J].地质学报,83(8):1074-1082.
He Dian, Li Jianghai.2009. Drainage Network Development and Fold Growth of Qiulitage Structural Belt in Kuqa Foreland Fold and Thrust Belt[J]. Acta Geologica Sinica,83(8):1074-1082.

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  • 收稿日期:2009-03-10
  • 最后修改日期:2009-05-03
  • 录用日期:2009-05-05
  • 在线发布日期: 2009-07-24
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