Özet
The Intra-Pontide Suture between the Istanbul and Sakarya zones was regarded debatably either as a Neotethyan Suture or a trace of the Rheic Suture in Turkey. Here, we present U-Pb ages and Lu-Hf isotopic compositions of detrital zircons from the Silurian to Triassic sandstones of the Istanbul Zone. Upper Silurian-Lower Devonian sandstone is dominated by Mesoproterozoic zircons (1950–900 Ma), with subordinate peaks at the latest Neoproterozoic to Silurian (750–420 Ma) and mid-Archean (2850–2750 Ma) confirming their Avalonian affinity. Detrital zircon ages from Carboniferous-Triassic sandstones show major peaks at Carboniferous-Early Permian (360–270 Ma) and Late Neoproterozoic–Cambrian (750–480 Ma) while Mesoproterozoic zircons are insignificant. The εHf(t) values of the detrital zircons exhibit a wide range from −21.3 to +11.7, and over 62% of zircon grains have negative values, largely coinciding with those of the Paleozoic igneous rocks in the Sakarya Zone. The Istanbul Zone is devoid of Carboniferous igneous and/or metamorphic rocks. Therefore, abundant Carboniferous zircons and the disappearance of the Mesoproterozoic zircons in the Carboniferous-Triassic sandstones of the Istanbul Zone require juxtaposition with a continental domain similar to the Sakarya and Strandja zones, which are characterized by widespread Carboniferous magmatism. We suggest that the Intra-Pontide Suture represents the trace of the Rheic Suture in Turkey, along which Avalonia and Armorica collided during the Early Carboniferous.
Orijinal dil | İngilizce |
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Makale numarası | e2021TC006824 |
Dergi | Tectonics |
Hacim | 40 |
Basın numarası | 12 |
DOI'lar | |
Yayın durumu | Yayınlandı - Ara 2021 |
Bibliyografik not
Publisher Copyright:© 2021. American Geophysical Union. All Rights Reserved.
Finansman
Xiumian Hu and Remziye Akdoğan gratefully acknowledge financial supports by the National Science Foundation of China‐Tethyan Major Project (No. 91755209). We thank Mehmet Ali Oral for preparation of the thin sections. Helps of Wei Li during U‐Pb dating and of Juan Li during cathodoluminescence imaging are gratefully acknowledged. Careful and constructive reviews by Matthew Campbell and two anonymous reviewers considerably improved the manuscript. Xiumian Hu and Remziye Akdoğan gratefully acknowledge financial supports by the National Science Foundation of China-Tethyan Major Project (No. 91755209). We thank Mehmet Ali Oral for preparation of the thin sections. Helps of Wei Li during U-Pb dating and of Juan Li during cathodoluminescence imaging are gratefully acknowledged. Careful and constructive reviews by Matthew Campbell and two anonymous reviewers considerably improved the manuscript.
Finansörler | Finansör numarası |
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National Science Foundation of China-Tethyan Major Project | |
National Science Foundation of China‐Tethyan Major Project | 91755209 |