Processes of forearc and accretionary complex formation during arc-continent collision in the southern Ural Mountains

Research Article| July 01, 1999 Processes of forearc and accretionary complex formation during arc-continent collision in the southern Ural Mountains D. Brown; D. Brown 1Instituto de Ciencias de la Tierra "Jaume Almera", c/Lluís Solé i Sabarís s/n, 08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar P. Spadea P. Spadea 2Dipartimento di Georisorse e Territorio, Universitá di Udine, Via Cotonificio 114, I-33100 Udine, Italy Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (7): 649–652. https://doi.org/10.1130/0091-7613(1999)027<0649:POFAAC>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation D. Brown, P. Spadea; Processes of forearc and accretionary complex formation during arc-continent collision in the southern Ural Mountains. Geology 1999;; 27 (7): 649–652. doi: https://doi.org/10.1130/0091-7613(1999)027<0649:POFAAC>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 southern Ural Mountains of Russia contain a well-preserved, well-exposed Paleozoic accretionary wedge and forearc that can be readily compared to those in active arc-continent collision zones. The early convergent history in the southern Ural Mountains is marked by the generation of boninite-bearing arc tholeiites in the Magnitogorsk forearc, followed by arc tholeiite to calc-alkaline volcanism. With the entry of the East European craton continental crust in the subduction zone, volcanism waned and stopped, and high-pressure metamorphism of its leading edge took place. The arrival of the full thickness of the continental crust at the subduction zone is marked by increased sedimentation in the forearc basin and deposition of arc-derived volcaniclastic turbidites across the subducting slab. These, together with offscraped continental material, the exhumed high-pressure rocks, and a lherzolite massif, formed an accretionary wedge. A broad melange zone containing ultramafic fragments separates the forearc basement from the accretionary wedge, and marks the damage zone that developed along the backstop region. Shallow-water carbonates deposited unconformably on top of the mildly deformed arc record the end of the collision and the collapse of the arc. 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.