Interrelationships between Deformation and Metamorphic Events across the Western Hinterland Zone, NW Pakistan

Microscopic to mesoscopic structural investigations and foliation intersection axes（FIAs） preserved in porphyroblasts reveal a very complex history of deformation and tectonism within the southwestern part of the western hinterland zone along the northern margin of the Indian plate, NW Pakistan. D_1...

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Bibliographic Details
Published in:Journal of earth science (Wuhan, China) China), 2016-08, Vol.27 (4), p.584-598
Main Authors: Ali, Asghar, Yar, Mustafa, Khan, Muhammad Asif, Faisal, Shah
Format: Article
Language:English
Subjects:
Biogeosciences
Boundaries
Deformation
Earth and Environmental Science
Earth science
Earth Sciences
Equivalence
Fabrics
Geochemistry
Geological faults
Geology
Geotechnical Engineering & Applied Earth Sciences
Metamorphic rocks
Metamorphism
Minerals
Pakistan
Plate tectonics
Thrust
介观结构
印度板块
变质事件
地带
巴基斯坦
相交轴
等效变形
西北部
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Summary:Microscopic to mesoscopic structural investigations and foliation intersection axes（FIAs） preserved in porphyroblasts reveal a very complex history of deformation and tectonism within the southwestern part of the western hinterland zone along the northern margin of the Indian plate, NW Pakistan. D_1, D_2, and D_3 related structures in the southwestern part resemble the F_1/F_2, F_3, and F_4 related structures in the northeastern part of the western hinterland zone. These structures developed at the same time through the same changes in the direction of bulk shortening in southwestern and northeastern parts of the western hinterland zone. FIA set 1 indicates NW-SE shortening. The D_2 fabrics, mineral lineations and fold axes indicate E-W shortening. FIA set 2, D_3 fold axes and mineral lineations indicate NNE-SSW shortening. D_3 deformation event is equivalent to the F_4 deformation event in the northeastern part of the western hinterland zone. D_4 fold axes, mineral stretching lineations and axial plane foliation suggest ENE-WSW shortening. The D_4 NNW-SSE fabrics, which formed in the region after the formation of the MMT（main mantle thrust）, Khairabad-Panjal thrust fault, Hissartang thrust fault and MBT（main boundary thrust）, likely resulted from ENE-WSW bulk shortening related to development of the Hazara-Kashmir syntaxis.
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-016-0717-1