用户名: 密码: 验证码:
An Out-of-Syncline Thrust Model for the “Chengde Thrust Sheet” in Central Intraplate Yanshan Orogenic Belt, Northern North China Craton
详细信息   
摘要

    

///The complicated and enigmatic Jurassic folds and thrusts around Chengde Basin in central intraplate Yanshan Orogenic Belt were previously interpreted as a synclinal deformed thrust sheet with large-displacement (~>40-45 km) formed after Late Jurassic Tuchengzi Formation. This model has been challenged by many new findings in paleogeographic and provenance analysis of Tuchengzi Formation and Proterozoic Changcheng System, together with the research result in tectonic deformations. Meanwhile no new model has been proposed so far to account reasonably for the structural style and tectonic framework as well as the evolution process of this structurally complicated region. The research implies that there is no large-scale thin-skinned thrust tectonics in intraplate Yanshan Orogenic Belt as those in foreland fold and thrust belt of collision orogenic belt. Fold-accommodation fault is supposed to be treated as an important alternative model in dealing with the relationship between large-scale folds and thrust faults as well as tectonic framework and evolution in contraction regime.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700