Upper Jurassic-Lower Cretaceous Deposits of the Eastern Part of the Oloy Zone: Stratigraphy, Geochemistry, Age, and Geodynamic Setting

被引：0
|
作者：
Starikova, E. V. [1 ]
Gagieva, A. M. [2 ]
Konovalov, A. L. [1 ]
Vatrushkina, E. V. [3 ]
Akinin, V. V. [2 ,4 ]
机构：
[1] Russian Geol Res Inst VSEGEI, St Petersburg 190106, Russia
[2] Russian Acad Sci, Shilo Northeastern Complex Res Inst SVKNII, Far Eastern Branch, Magadan 685000, Russia
[3] Russian Acad Sci, Geol Inst GIN, Moscow 119017, Russia
[4] Russian Acad Sci, Diamond & Precious Met Geol Inst, Siberian Branch, Yakutsk 677007, Russia
来源：
RUSSIAN JOURNAL OF PACIFIC GEOLOGY | 2023年 / 17卷 / 04期
基金：
俄罗斯科学基金会;
关键词：
Upper Jurassic-Lower Cretaceous deposits; stratigraphy; geochemistry; isotopic dating; Oloy zone; western Chukotka; SOUTH ANYUI SUTURE; CHEMICAL CLASSIFICATION; TECTONIC EVOLUTION; NORTHEAST; ELEMENT;
D O I：
10.1134/S181971402304005X
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
This paper reports new data on the geology and stratigraphy of the Upper Jurassic-Lower Cretaceous deposits of the eastern part of the Oloy zone (upper reaches of the Oloy, Ilguveem, Aluchin rivers), including the description of sections, lithological-petrographic and paleontological characteristics of volcaniclastic sediments, the results of petrological-geochemical study of volcanic rocks, and their isotope dating. Two concordant dates were obtained using the zircon U-Pb method: 147 & PLUSMN; 2 Ma (Elom Formation) and 140 & PLUSMN; 2 Ma (Glukhovskaya Formation). The island-arc nature of the studied formations has been substantiated. The facies conditions and geodynamic settings of all stages of the formation of the volcanic-sedimentary complex in the various structural-facies zones have been characterized.
引用
收藏
页码：297 / 321
页数：25
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