Early Cretaceous Granitic and Monzonitic Rocks of the Southern Part of the Zhuravlevka Terrane (Sikhote-Alin): Geochemical Composition and Melt Sources


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Аннотация

The article presents new geological, geochronological, mineralogical, geochemical, and isotopic data on the Early Cretaceous granitic rocks of the southern part of the Zhuravlevka Terrane (Sikhote-Alin). It is shown that four intrusive complexes containing significant amounts of granitic rocks were formed almost simultaneously in this area in the Early Cretaceous (about 100 Ma). These magmatic associations differ in rock set, their mineralogical characteristics, and chemical composition, varying from medium-potassium tonalites and granodiorites depleted in incompatible elements to shoshonitic monzonitic rocks enriched in HFSE and REE. The geochemical and isotopic characteristics of the granitic rocks indicate that the source of their melts was dominated by essentially juvenile metabasite crust with a limited contribution of the upper-crustal metasedimentary rocks. The diversity of geochemical types of the granitic rocks is explained by variable metabasite and metapelite contributions to their source, upper crustal contamination during magma ascent, as well as the variable contribution of the mantle source and different mechanisms of mantle–crust interaction.

Об авторах

N. Kruk

Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences; Novosibirsk State University

Автор, ответственный за переписку.
Email: kruk@igm.nsc.ru
Россия, pr. Akademika Koptyuga 3, Novosibirsk, 630090; ul. Pirogova 2, Novosiborsk, 630090

V. Gvozdev

Far East Geological Institute, Far East Branch, Russian Academy of Sciences

Email: serov@geoksc.apatity.ru
Россия, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022

A. Orekhov

Far East Geological Institute, Far East Branch, Russian Academy of Sciences

Email: serov@geoksc.apatity.ru
Россия, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022

E. Kruk

Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences

Автор, ответственный за переписку.
Email: nn@mail.ru
Россия, pr. Akademika Koptyuga 3, Novosibirsk, 630090

S. Kasatkin

Far East Geological Institute, Far East Branch, Russian Academy of Sciences

Email: serov@geoksc.apatity.ru
Россия, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022

V. Golozubov

Far East Geological Institute, Far East Branch, Russian Academy of Sciences

Автор, ответственный за переписку.
Email: golozubov@fegi.ru
Россия, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022

S. Rudnev

Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences

Email: serov@geoksc.apatity.ru
Россия, pr. Akademika Koptyuga 3, Novosibirsk, 630090

Sh. Aoki

Okayama University of Science

Email: serov@geoksc.apatity.ru
Япония, Okayama

T. Komiya

Tokyo University

Email: serov@geoksc.apatity.ru
Япония, Tokyo

V. Kovach

Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences

Автор, ответственный за переписку.
Email: v.kovach@mail.ru
Россия, nab. Makarova 2, St. Petersburg, 1190034

P. Serov

Geological Institute, Kola Science Center, Russian Academy of Sciences

Автор, ответственный за переписку.
Email: serov@geoksc.apatity.ru
Россия, ul. Fersmana 14, Apatity, 184209


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