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Article

The Overmaraat-Gol Alkaline Pluton in Northern Mongolia: U–Pb Age and Preliminary Implications for Magma Sources and Tectonic Setting

1
Department of Geology and Geography, Tomsk State University, Tomsk 634050, Russia
2
Department of Earth Sciences, Carleton University, Ottawa, ON K1S 5B6, Canada
3
Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
4
Department of Geology and Geophysics, Novosibirsk State University, Novosibirsk 630090, Russia
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(3), 170; https://doi.org/10.3390/min9030170
Received: 11 January 2019 / Revised: 6 March 2019 / Accepted: 6 March 2019 / Published: 10 March 2019
(This article belongs to the Section Mineral Geochemistry and Geochronology)
A new Wenlockian zircon U–Pb age (~426 Ma) of the Overmaraat-Gol nepheline syenite (foyaite, juvite) pluton in the SW Lake Hovsgol area (Northern Mongolia) prompts a long history of alkaline magmatism in the western Central Asian Orogenic Belt, exceeding the duration of the Devonian and Permian–Triassic events. The LILE and HFSE patterns of pluton samples analyzed by X-ray fluorescence (XRF) and inductively coupled plasma (ICP-MS) methods indicate intrusion in a complex tectonic setting during interaction of a mantle plume with accretionary-collisional complexes that previously formed on the active continental margin. As a result, the parent magma had a heterogeneous source with mixed mantle (PREMA and EM) and crustal components. This source composition is consistent with Nd–Sr isotope ratios of the Overmaraat-Gol alkaline rocks, from −0.1 to −1.2 εNd(t) and from ~0.706 to 0.707 87Sr/86Sr(t). View Full-Text
Keywords: alkaline magmatism; geochemistry; U–Pb isotope geochronology; plume–lithosphere interaction; Northern Mongolia; Central Asian Orogenic Belt alkaline magmatism; geochemistry; U–Pb isotope geochronology; plume–lithosphere interaction; Northern Mongolia; Central Asian Orogenic Belt
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MDPI and ACS Style

Vrublevskii, V.V.; Gertner, I.F.; Ernst, R.E.; Izokh, A.E.; Vishnevskii, A.V. The Overmaraat-Gol Alkaline Pluton in Northern Mongolia: U–Pb Age and Preliminary Implications for Magma Sources and Tectonic Setting. Minerals 2019, 9, 170. https://doi.org/10.3390/min9030170

AMA Style

Vrublevskii VV, Gertner IF, Ernst RE, Izokh AE, Vishnevskii AV. The Overmaraat-Gol Alkaline Pluton in Northern Mongolia: U–Pb Age and Preliminary Implications for Magma Sources and Tectonic Setting. Minerals. 2019; 9(3):170. https://doi.org/10.3390/min9030170

Chicago/Turabian Style

Vrublevskii, Vassily V.; Gertner, Igor F.; Ernst, Richard E.; Izokh, Andrey E.; Vishnevskii, Andrey V. 2019. "The Overmaraat-Gol Alkaline Pluton in Northern Mongolia: U–Pb Age and Preliminary Implications for Magma Sources and Tectonic Setting" Minerals 9, no. 3: 170. https://doi.org/10.3390/min9030170

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