FIRST FIND OF ORDOVICIAN GRANITOIDS IN SENYAVIN GRANITE-METAMORPHIC DOME, EAST CHUKOTKA: AGE SUBSTANTIATION AND COMPOSITION AFFINITIES
- Авторлар: Luchitskaya M.V1, Isaeva E.P1,2, Sokolov S.D1
-
Мекемелер:
- Geological Institute, Russian Academy of Sciences
- Karpinsky All-Russian Science–Research Geological Institute
- Шығарылым: Том 524, № 2 (2025)
- Беттер: 188-198
- Бөлім: GEOLOGY
- ##submission.dateSubmitted##: 08.12.2025
- ##submission.datePublished##: 15.10.2025
- URL: https://journals.rcsi.science/2686-7397/article/view/356827
- DOI: https://doi.org/10.7868/S3034506525100029
- ID: 356827
Дәйексөз келтіру
Аннотация
In the western part of Senyavin granite-metamorphic dome of East Chukotka the granitoids, intruding complexes of crystalline basement, represented by Penkigney metamorphic Formation, are firstly dated. U–Th–Pb (SIMS) geochronological study of leucogranites is carried out and age estimate 467±6 Ma, corresponding to Middle Ordovician is obtained. This fact allows to suggest the existence of the Early Paleozoic (Ordovician) stage of granitoid magmatism in this region. Composition affinities of granitoids indicate their similarity to I-S granites or differentiated I-type granites. The intrusion of granitoids may have been caused by Caledonian tectono-magmatic events, indicating possible connections with the Caledonides of East Greenland, Spitsbergen and the Peary terrane.
Негізгі сөздер
Авторлар туралы
M. Luchitskaya
Geological Institute, Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: luchitskaya@gimras.ru
Moscow, Russia
E. Isaeva
Geological Institute, Russian Academy of Sciences; Karpinsky All-Russian Science–Research Geological Institute
Email: luchitskaya@gimras.ru
Moscow, Russia; St. Petersburg, Russia
S. Sokolov
Geological Institute, Russian Academy of Sciences
Email: luchitskaya@gimras.ru
Corresponding Member of the RAS
Moscow, RussiaӘдебиет тізімі
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