Newly identified strike-slip plate boundary in the northeastern Arabian Sea

Abstract

Research Article| April 01, 2000 Newly identified strike-slip plate boundary in the northeastern Arabian Sea Nina Kukowski; Nina Kukowski 1GEOMAR Forschungszentrum für Marine Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Wischhofstrasse 1-3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Thies Schillhorn; Thies Schillhorn 1GEOMAR Forschungszentrum für Marine Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Wischhofstrasse 1-3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Ernst R. Flueh; Ernst R. Flueh 1GEOMAR Forschungszentrum für Marine Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Wischhofstrasse 1-3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Katrin Huhn Katrin Huhn 1GEOMAR Forschungszentrum für Marine Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Wischhofstrasse 1-3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Geology (2000) 28 (4): 355–358. https://doi.org/10.1130/0091-7613(2000)28<355:NISPBI>2.0.CO;2 Article history received: 06 Oct 1999 rev-recd: 12 Jan 2000 accepted: 26 Jan 2000 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Nina Kukowski, Thies Schillhorn, Ernst R. Flueh, Katrin Huhn; Newly identified strike-slip plate boundary in the northeastern Arabian Sea. Geology 2000;; 28 (4): 355–358. doi: https://doi.org/10.1130/0091-7613(2000)28<355:NISPBI>2.0.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 first regional swath-bathymetry survey of the Makran accretionary wedge revealed a sinistral strike-slip fault, named herein the Sonne fault, obliquely crossing the wedge and continuing into the abyssal plane. This fault separates the western part of the Makran subduction zone where plate boundary events are absent from the eastern part that does show plate boundary seismicity; most events are concentrated along the Sonne fault. Little Murray Ridge (a basement high) and related magnetic anomalies are offset along the Sonne fault. Together, these observations identify the newly discovered Sonne strike-slip fault as a plate boundary that has been active ∼2 m.y. This finding suggests that what has been considered the northeasternmost part of the Arabian plate is actually a separate microplate, named herein the Ormara plate, the formation of which resulted from tearing of the Arabian plate along the Sonne fault. With this concept, the different dips of the downgoing plate below the western and eastern parts of the Makran margin and the related different distances between the trench and Quaternary arc volcanic centers can be unequivocally explained. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.