کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8908415 | 1635734 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New zircon U-Pb LA-ICP-MS ages and Hf isotope data from the Central Pontides (Turkey): Geological and geodynamic constraints
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: New zircon U-Pb LA-ICP-MS ages and Hf isotope data from the Central Pontides (Turkey): Geological and geodynamic constraints New zircon U-Pb LA-ICP-MS ages and Hf isotope data from the Central Pontides (Turkey): Geological and geodynamic constraints](/preview/png/8908415.png)
چکیده انگلیسی
The Central Pontides in northern Anatolia is located on the accretionary complex formed by the closure of Neotethyan Intra-Pontide Ocean between the southern Eurasian margin (Istanbul-Zonguldak Terrane) and the Cimmerian Sakarya Composite Terrane. Among other components of the oceanic lithosphere, it comprises not yet well-dated felsic igneous rocks formed in arc-basin as well as continent margin settings. In-situ U-Pb age results for zircons from the arc-basin system (öangaldaÄ Metamorphic Complex) and the continental arc (Devrekani Metadiorite and Granitoid) yield ages of 176â¯Â±â¯6â¯Ma, 163â¯Â±â¯9â¯Ma and 165â¯Â±â¯3â¯Ma, respectively. Corresponding in-situ average (initial) 176Hf/177Hf initial ratios are 0.28261â¯Â±â¯0.00003, 0.28267â¯Â±â¯0.00002 and 0.28290â¯Â±â¯0.00004 for these units and indicative of a subduction-modified mantle source. The new U-Pb ages and Hf isotope data from these oceanic and continental arc units together with regional geological constraints support the presence of a multiple subduction system within the Intra-Pontide Ocean during the Middle Jurassic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geodynamics - Volume 116, May 2018, Pages 23-36
Journal: Journal of Geodynamics - Volume 116, May 2018, Pages 23-36
نویسندگان
Okay Ãimen, M. Cemal GöncüoÄlu, Antonio Simonetti, Kaan Sayit,