Albian–Cenomanian Orogenic Belt and Igneous Province of Pacific Asia
- Authors: Khanchuk A.I.1, Grebennikov A.V.1,2, Ivanov V.V.1
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Affiliations:
- Far East Geological Institute, Far East Branch, Russian Academy of Sciences
- Far East Federal University
- Issue: Vol 13, No 3 (2019)
- Pages: 187-219
- Section: Article
- URL: https://journals.rcsi.science/1819-7140/article/view/211623
- DOI: https://doi.org/10.1134/S1819714019030035
- ID: 211623
Cite item
Abstract
Geological data and about 300 precision geochronological and geochemical determinations are analyzed to identify the Albian–Cenomanian continental-margin orogenic belt and simultaneous igneous province of Pacific Asia. The orogenic belt represents a newly formed region of continental lithosphere that resulted from the deformation of mainly Jurassic–Early Cretaceous epioceanic terranes. The igneous province is made up of volcanic and intrusive complexes of mostly Albian age, which are syn-orogenic within the belt and post-orogenic beyond it. The igneous rocks include A-, I-, and S-type granitoids; adakites; and VAB- and OIB-type basalts and their intrusive analogues. Both the orogenic belt and the igneous province were formed in a tectonic setting of a transform continental margin between 110 and 95 Ma. The interval of 103–97 Ma became the peak of orogenic and magmatic activity caused by upwelling of the hot asthenospheric mantle through destructed stagnant slabs of the pre-Albian subduction. The Albian–Cenomanian age of the large gold, copper, tungsten, tin, and other ore deposits argues in favor of recognition of the corresponding metallogenic province. The first age data (100–97 Ma) are reported for the granite from the Malmyzh deposit within the Sikhote-Alin Ridge.
About the authors
A. I. Khanchuk
Far East Geological Institute, Far East Branch, Russian Academy of Sciences
Author for correspondence.
Email: axanchuk@mail.ru
Russian Federation, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022
A. V. Grebennikov
Far East Geological Institute, Far East Branch, Russian Academy of Sciences; Far East Federal University
Author for correspondence.
Email: greandr@hotmail.com
Russian Federation, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022; ul. Sukhanova 8, Vladivostok, 690950
V. V. Ivanov
Far East Geological Institute, Far East Branch, Russian Academy of Sciences
Email: greandr@hotmail.com
Russian Federation, pr. 100-letiya Vladivostoku 159, Vladivostok, 690022