NDLI: Late Jurassic-Neocomian volcanism of the northern Okhotsk region: Geology, tectonic settings, and mineralization

Content Provider	Springer Nature Link
Author	Rusakova, T. B.
Copyright Year	2011
Abstract	The paper deals with new data on the geology, geochronometry, and petrogeochemistry of the Upper Jurassic-Neocomian basaltic andesites constituting the base of the Cretaceous volcanogenic section in the northern Okhotsk region. The geochronometric data confirm the Late Jurassic-Neocomian age of these rocks (147–138 Ma, K-Ar method). Their characteristic features provide grounds for considering these rocks as fragments of the Uda volcanic belt. The comparison of the petrogeochemical characteristics with similar parameters of other different-age tectonic structures of the region under consideration that were formed in different geodynamic environments (intracontiental and continental marginal volcanogenic belts, island arcs) revealed similarity between the conditions of the formation of the Late Jurassic-Neocomian (Uda belt) and Albian-Cenomanian (Okhotsk-Chukotka belt) volcanics: both characterize continental marginal environments. It is assumed that the Late Jurassic-Neocomian volcanism associates with Au-Ag mineralization, which is also expected in other similar although poorly known volcanic structures.
Starting Page	418
Ending Page	432
Page Count	15
File Format	PDF
ISSN	18197140
Journal	Russian Journal of Pacific Geology
Volume Number	5
Issue Number	5
e-ISSN	18197159
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-10-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	stratigraphy andesites basalts Au-Ag mineralization Uda volcanic belt northern Okhotsk region Geology
Content Type	Text
Resource Type	Article
Subject	Geology Geophysics Geochemistry and Petrology Oceanography Paleontology Stratigraphy

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