FIRST DETRITAL ZIRCON GEOCHRONOLOGY DATA FOR CLASTIC ROCKS OF THE EAST SAKHALIN ACCRETIONARY TERRANE

First detrital zircon geochronology data and results of geochemical studies for clastic rocks of the Rymnik and Nabil zones of the East Sakhalin accretionary terrane, located within the region of the East Sakhalin Mountains, are presented. The studies have been carried out at the Center for Collecti...

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Bibliographic Details
Published in:Phytotaxa
Main Authors: I. A. Alexandrov, V. V. Ivin, A. I. Malinovsky, S. Yu. Budnitskiy, И. А. Александров, В. В. Ивин, А. И. Малиновский, С. Ю. Будницкий
Other Authors: The work has been done under financial support of RFBR as part of research project 19-05-00440., Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 19-05-00440. Авторы благодарят сотрудников ФГБУ «Сахалинское УГМС» и лично А.С. Каргову, а также А.Ю. Шонина за помощь в проведении полевых работ.
Format: Article in Journal/Newspaper
Language:Russian
Published: Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch 2022
Subjects:
турбидиты
accretionary complex
detrital zircon
turbidities
аккреционный комплекс
детритовые цирконы
Sakhalin
Online Access:https://www.gt-crust.ru/jour/article/view/1395
https://doi.org/10.5800/GT-2022-13-2s-0612
Description
Summary:First detrital zircon geochronology data and results of geochemical studies for clastic rocks of the Rymnik and Nabil zones of the East Sakhalin accretionary terrane, located within the region of the East Sakhalin Mountains, are presented. The studies have been carried out at the Center for Collective Use of Far Eastern Geological Institute of the Far East Branch of the Russian Academy of Sciences in Vladivostok. The established geochemical features suggest that the source of the clastic material of the zones was felsic rocks of the deeply eroded continental island arc or arcs. Although the geochemical characteristics are similar, there are sharp differences between the detrital zircons’ age distribution patterns of rocks of these zones. In the sandstone of the Nabil zone, 75 % of the zircon grains are of the middle Cretaceous age (94–108 Ma) with a peak of 96 Ma, 15 % are the middle Permian-Early Jurassic, and 10 % are the Precambrian (mainly Paleoproterozoic). The sandstone of the Rymnik zone has a more complex (polymodal) pattern of the detrital zircon age distribution, with a significant contribution of the Precambrian grains (37 %). Most of the grains belong to the Early Jurassic (peak 196 Ma) and the Early Cretaceous (peak 137 Ma), with 47 % of the Mesozoic grains. The likely provenances of the clastic material were the Middle Cretaceous volcanic arcs of the Asian eastern margin older complexes of the continent. В работе представлены первые результаты U/Pb датирования детритовых цирконов и исследования геохимии терригенных пород Рымникской и Набильской зон Восточно-Сахалинского аккреционного террейна (район Восточно-Сахалинских гор), выполненных в Центре коллективного пользования ДВГИ ДВО РАН. Установленные геохимические особенности позволяют предположить, что источником терригенного материала пород обеих зон являлись кислые породы глубоко эродированной эпиконтинентальной островной дуги (дуг). При сходстве геохимических характеристик породы Набильской и Рымникской зон резко различаются по спектрам ...

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