Silurian Granitoid Magmatism of the Rassokha Terrane (North-East Russia)

Autor:	Kevin R. Chamberlain, V. S. Maklashin, Sergey D. Sokolov, Andrey K. Khudoley, S. N. Sychev, A. V. Rogov, P. A. Lvov, O. Yu. Lebedeva
Rok vydání:	2020
Předmět:	Radiogenic nuclide 010504 meteorology & atmospheric sciences Geochemistry North east Structural basin 010502 geochemistry & geophysics 01 natural sciences Magmatism Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Island arc Geology 0105 earth and related environmental sciences Terrane
Zdroj:	Doklady Earth Sciences. 494:762-766
ISSN:	1531-8354 1028-334X
DOI:	10.1134/s1028334x20100104
Popis:	U–Pb dating of zircons from granitoids located within the Rassokha terrane show a Silurian age of their formation. Younger dates from one of the samples are related to radiogenic lead loss during secondary alteration of the rocks. Based on REE distributions as well as well-defined positive anomalies of K and Pb and negative anomalies of Ba, Sr, Nb, Ta, and Ti, the granitoids are comparable to rocks from supra-subduction environments. Combined with intrusive ages from adjacent areas, Silurian granitoid magmatism of the Rassokha terrane supports the existence of a back-arc basin and a long island arc in Ordovician-Silurian time.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f3eeed9e0e3622f1b420eea7c6f0feee https://doi.org/10.1134/s1028334x20100104 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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