کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4726643 1640135 2016 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pre-Alpine evolution of a segment of the North-Gondwanan margin: Geochronological and geochemical evidence from the central Serbo-Macedonian Massif
ترجمه فارسی عنوان
تکامل آلپ از یک قسمت از حاشیه شمال گندویان: شواهد ژئوتکنولوژیک و ژئوشیمیایی از مرکز مرکزی سروو-مقدونیه
کلمات کلیدی
ژیوکنگولوژی زیرکون، ماسبو صربستان-مقدونیه، تکتونیک قبل از آلپ، شمالی گاندوانا، جنوب شرقی اروپا
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی


• The SMM was part of a North-Gondwanan magmatic arc during the late Neoproterozoic.
• LA-ICPMS U–Pb dating of zircons revealed four pre-Alpine stages of magmatism in the SMM.
• High-strain deformation in the SMM is constrained to the Variscan orogeny.

The Serbo-Macedonian Massif (SMM) represents a composite crystalline belt within the Eastern European Alpine orogen, outcropping from the Pannonian basin in the north, to the Aegean Sea in the south. The central parts of the massif (i.e. southeastern Serbia, southwestern Bulgaria, eastern Macedonia) consist of the medium- to high-grade Lower Complex, and the low-grade Vlasina Unit. New results of U–Pb LA-ICP-MS analyses, coupled with geochemical analyses of Hf isotopes on magmatic and detrital zircons, and main and trace element concentrations in whole-rock samples suggest that the central SMM and the basement of the adjacent units (i.e. Eastern Veles series and Struma Unit) originated in the central parts of the northern margin of Gondwana. These data provided a basis for a revised tectonic model of the evolution of the SMM from the late Ediacaran to the Early Triassic.The earliest magmatism in the Lower Complex, Vlasina Unit and the basement of Struma Unit is related to the activity along the late Cadomian magmatic arc (562–522 Ma). Subsequent stage of early Palaeozoic igneous activity is associated with the reactivation of subduction below the Lower Complex and the Eastern Veles series during the Early Ordovician (490–478 Ma), emplacement of mafic dykes in the Lower Complex due to aborted rifting in the Middle Ordovician (472–456 Ma), and felsic within-plate magmatism in the early Silurian (439 ± 2 Ma). The third magmatic stage is represented by Carboniferous late to post-collisional granites (328–304 Ma). These granites intrude the gneisses of the Lower Complex, in which the youngest deformed igneous rocks are of early Silurian age, thus constraining the high-strain deformation and peak metamorphism to the Variscan orogeny. The Permian–Triassic (255–253 Ma) stage of late- to post-collisional and within-plate felsic magmatism is related to the opening of the Mesozoic Tethys.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gondwana Research - Volume 36, August 2016, Pages 523–544
نویسندگان
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