The Sr–Nd–Pb–Hf Isotopic Composition of Late Paleozoic Granitoids in Central Chukotka
- Авторы: Luchitskaya M.V.1, Belyatsky B.V.2, Belousova E.A.3, Natapov L.M.3
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Учреждения:
- Geological Institute, Russian Academy of Sciences
- Karpinsky All-Russia Geological Research Institute
- GEMOC ARC National Key Centre, Department of Earth and Planetary Sciences, Macquarie University
- Выпуск: Том 485, № 1 (2019)
- Страницы: 231-234
- Раздел: Geology
- URL: https://ogarev-online.ru/1028-334X/article/view/194647
- DOI: https://doi.org/10.1134/S1028334X1903005X
- ID: 194647
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Аннотация
The results of Sr–Nd–Pb–Hf isotope analysis of Late Paleozoic granitoids of Central Chukotka, which are exemplified by the Kibera and Kuekvun plutons, are presented. The ages of these granitic plutons and of granite pebbles from conglomerates at the base of the overlying Lower Carboniferous strata are 351–363 Ma (U–Pb zircon, TIMS, SIMS, LA–ICP–MS). Thus, granitic magmatism is contemporaneous to tectonic events of the Ellesmerian orogeny in the Arctic region. The Sr–Nd–Pb–Hf isotopic compositions of the granitoids indicate the contribution of mantle and crustal components to the granite melt source. The formation of granitoids probably occurred in the geodynamic settings of an Andean type continental margin with interaction between mantle melts, forming in a mantle wedge under suprasubduction conditions, and the continental crust.
Об авторах
M. Luchitskaya
Geological Institute, Russian Academy of Sciences
Автор, ответственный за переписку.
Email: luchitskaya@ginras.ru
Россия, Moscow, 119017
B. Belyatsky
Karpinsky All-Russia Geological Research Institute
Email: luchitskaya@ginras.ru
Россия,
St. Petersburg, 199106
E. Belousova
GEMOC ARC National Key Centre, Department of Earth and Planetary Sciences, Macquarie University
Email: luchitskaya@ginras.ru
Австралия, Sydney
L. Natapov
GEMOC ARC National Key Centre, Department of Earth and Planetary Sciences, Macquarie University
Email: luchitskaya@ginras.ru
Австралия, Sydney
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