Oblique convergence and the lobate mountain belts of western Pakistan

Research Article| January 01, 1997 Oblique convergence and the lobate mountain belts of western Pakistan Saad S. B. Haq; Saad S. B. Haq 1Department of Earth and Space Sciences, State University of New York, Stony Brook, New York 11794 Search for other works by this author on: GSW Google Scholar Dan M. Davis Dan M. Davis 1Department of Earth and Space Sciences, State University of New York, Stony Brook, New York 11794 Search for other works by this author on: GSW Google Scholar Author and Article Information Saad S. B. Haq 1Department of Earth and Space Sciences, State University of New York, Stony Brook, New York 11794 Dan M. Davis 1Department of Earth and Space Sciences, State University of New York, Stony Brook, New York 11794 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (1): 23–26. https://doi.org/10.1130/0091-7613(1997)025<0023:OCATLM>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Saad S. B. Haq, Dan M. Davis; Oblique convergence and the lobate mountain belts of western Pakistan. Geology 1997;; 25 (1): 23–26. doi: https://doi.org/10.1130/0091-7613(1997)025<0023:OCATLM>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The thin-skinned structures of the Pakistani convergent margin have formed as a consequence of the relative motion between India and Eurasia. Most of the resultant motion is being accommodated along or near the current edge of the Eurasian plate: the southwest-northeast striking Chaman fault zone. It has been observed at oblique margins that the total plate motion is resolved into a component parallel to the margin, accommodated through strike-slip faulting, and a component normal to the margin taken up as contraction. However, the orientations of structures along the Pakistani convergent margin in and around the Sulaiman lobe and Sulaiman Range cannot be explained simply by resolving the plate motion vector into components normal and parallel to the plate boundary. Our modeling suggests that the complex juxtaposition of strike-slip faults with thrust faults of various orientations can be explained by the presence of a block centered upon the Katawaz basin that translates along the southwest-northeast structural barrier of the Chaman fault zone, moving with respect to both Eurasia and India. As this relatively rigid block moves northeastward relative to Asia, it causes deformation of the sedimentary cover and is responsible for much of the structural complexity in the Pakistani foreland. Our simple model explains several first-order features of this oblique margin, such as the eastward-facing Sulaiman Range, the strike-slip Kingri fault (located between the Sulaiman lobe and Sulaiman Range), and the reentrant at Sibi. This leads us to conclude that very complex structural and geometric relationships at oblique convergent plate boundaries can result from the accommodation of strain with simple initial geometric constraints. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.