TY - JOUR AU - Çolakoğlu, Ali Rıza AU - Günay, Kurtulus AU - Göncüoğlu, M. Cemal AU - Oyan, Vural AU - Erdoğan, Kemal PY - 2014/12/20 Y2 - 2024/03/29 TI - GEOCHEMICAL EVALUATION OF THE LATE MAASTRICHTIAN SUBDUCTION-RELATED VOLCANISM IN THE SOUTHERN NEOTETHYS IN VAN AREA, AND A CORRELATION ACROSS THE TURKISH-IRANIAN BORDER JF - Ofioliti JA - Ofioliti VL - 39 IS - 2 SE - DO - 10.4454/ofioliti.v39i2.429 UR - https://ofioliti.it/index.php/ofioliti/article/view/429 SP - 51-65 AB - <p class="p1">The Yüksekova mélange to the NE of Van, close to the Turkish-Iranian border is part of the Berit-Elazig-Van ophiolitic belt. It structurally overlies the</p> <p class="p1">Bitlis-Pütürge metamorphic complex and includes the remnants of the southern Neotethys. The mélange complex comprises mantle rocks together with massive</p> <p class="p1">and pillowed lavas and dykes associated with late Maastrichtian micritic limestones and radiolarian cherts. The lavas are trachyandesite/basaltic, whereas</p> <p class="p1">the dykes are alkali basalt in composition. Both rock types were probably formed by low-degree partial melting of a mixed source including primitive mantle</p> <p class="p1">and depleted MOR mantle components, which were subsequently affected by subduction modification. The geochemical character constrains the formation of</p> <p class="p1">these basalts, yet the youngest ones dated in the Yüksekova mélange to an intra-oceanic subduction zone within the Neotethys at the end of Cretaceous. The</p> <p class="p1">new ages and the tectonic setting of the volcanic rocks are correlated with other oceanic assemblages (e.g., Khoy and Inner Zagros ophiolites in Iran) across</p> <p class="p1">the Turkish-Iranian border.</p> ER -