The Interrelationship of Micro-Meso and Macroscopic Structures on the Western Limb of the Hazara Kashmir Syntaxis, Pakistan
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:


The Interrelationship of Micro-Meso and Macroscopic Structures on the Western Limb of the Hazara Kashmir Syntaxis, Pakistan
Author:
Affiliation:

Fund Project:

Financial support by the Department of Geology, University of Peshawar is highly appreciated. We are grateful to three reviewers for their in-depth review of the manuscript and Dr. Lian Liu for editorial handling.

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    Abstract:

    Detailed micro–meso to macroscopic structural analyses reveal two deformation phases in the western limb of the Hazara-Kashmir Syntaxis (HKS). Bulk top to NW shearing transformed initially symmetrical NNE–SSW trending meso to macroscopic folds from asymmetric to overturned ones without changing their trend. Sigmoidal en-echelon tension gashes developed during this deformation, that were oblique to bedding parallel worm burrows and bedding planes themselves. Strain analyses of deformed elliptical ooids using the Rf/f method constrain the internal strain patterns of the NNE–SSW structures. The principal stretching axis (S3) defined by deformed elliptical ooids is oriented N27°E at right angles to WNW–ESE shortening. The deformed elliptical ooids in sub-vertical bedding vertical planes contain ooids that plunge ~70° SE due to NW-directed tectonic transport. Finite strain ratios are 1.45 (Rxy) parallel to bedding plane and 1.46 (Ryz) for the vertical plane. From these 2D strain values, we derive an oblate strain ellipsoidal in 3D using the Flinn and Hsu/Nadai techniques. Strains calculated from deformed elliptical ooids average –18.10% parallel to bedding and –18.47% in the vertical plane. However, a balanced cross-section through the study area indicates a minimum of ~–28% shortening. Consequently, regional shortening was only partially accommodated by internal deformation.

    参考文献
    相似文献
    引证文献
引用本文

Sohaib AHMAD, Asghar ALI, Khaista REHMAN.2017. The Interrelationship of Micro-Meso and Macroscopic Structures on the Western Limb of the Hazara Kashmir Syntaxis, Pakistan[J]. ACTA GEOLOGICA SINICA(English edition),91(5):1573~1623

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2015-10-13
  • 最后修改日期:2016-02-15
  • 录用日期:
  • 在线发布日期: 2017-10-23
  • 出版日期: