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Late Triassic siliceous-volcano-terrigenous deposits of the Chukchi Peninsula: composition of igneous rocks, U-Pb age of zircons, and geodynamic interpretations
Stockholm University, Faculty of Science, Department of Geological Sciences.
Number of Authors: 3
2016 (English)In: Russian Geology and Geophysics, ISSN 1068-7971, E-ISSN 1878-030X, Vol. 57, no 8, 1119-1134 p.Article in journal (Refereed) Published
Abstract [en]

Study of Late Triassic volcanic, subvolcanic, and volcanosedimentary rocks of the Chukchi Peninsula (Vel'may terrane) has shown their different geochemical types. Basalts, dolerites, and tuffs of the lower-middle strata of the Upper Triassic section bear evidence for their formation in suprasubductional geodynamic setting. Basalts and dolerites of the upper strata of this section correspond in composition to within-plate rocks and are similar to Middle-Late Triassic oceanic-plateau basalts and dolerites. U-Pb dating of magmatic zircons from tuffs of the lower-middle strata and from dolerites of the upper strata shows the almost synchronous magmatic activity in the suprasubductional (206 +/- 5 Ma) and within-plate (212 +/- 4 Ma) geodynamic settings. (C) 2016, V.S. Sobolev IGM, Siberian Branch of the RAS.

Place, publisher, year, edition, pages
2016. Vol. 57, no 8, 1119-1134 p.
Keyword [en]
geodynamic settings of magmatism, basaltic volcanism, U-Pb dating, Late Triassic, Vel'may terrane, Chukchi Peninsula
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-134279DOI: 10.1016/j.rgg.2016.08.001ISI: 000381701900001OAI: oai:DiVA.org:su-134279DiVA: diva2:1033292
Available from: 2016-10-06 Created: 2016-10-03 Last updated: 2017-11-30Bibliographically approved

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