Abstract

The results of studies of the lithochemical features of the Late Jurassic–Early Cretaceous tuff–terrigenous rocks of the Ust-Belsky and Algan terranes are presented. The rocks are medium-, fine-, ultrafine-grained quartz–feldspar and feldspar greywackes. The rocks were found to be formed synchronously to the volcanism of basic and intermediate composition under marine environment nearby the coasts. The main source of material was associated with the island arc on the west of the region. The rocks of Ust-Belsky terrane were formed at different parts of the forearc basin. Tuff-terrigenous rocks of Algan terrane were formed at the trench-slope basin.

中文翻译：

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Ust-Belsky山脉（科里亚克高原西北部）晚侏罗世—早白垩世凝灰岩—陆源岩形成的岩石化学特征与环境

摘要

介绍了 Ust-Belsky 和 ​​Algan 地体晚侏罗世-早白垩世凝灰岩-陆源岩的岩石化学特征研究结果。岩石是中、细、超细粒石英长石和长石灰瓦。发现这些岩石与海岸附近海洋环境下基本和中间成分的火山活动同步形成。材料的主要来源与该地区西部的岛弧有关。Ust-Belsky 地体的岩石形成于弧前盆地的不同部位。阿尔干地体凝灰岩陆源岩形成于沟坡盆地。