Abstract
The Mandakh–Mandal–Gobi (MMG) zone of alkali basalt magmatism has been delineated in the Late Mesozoic East Mongolian volcanic areal. It comprises clusters of igneous rock bodies and isolated stocks, domes, sills, laccoliths, dikes, and limited fragments of lava flows composed of tephrite, phono–tephrite, and trachybasalt. Two pulses of magmatism in the MMG zone have occurred in the Late Cretaceous (about 85 Ma) and Early Cenozoic (about 50 Ma). Recognition of this zone and deciphering of its formation history demonstrated that the development of the entire East Mongolian volcanic areal had the same regularities as those identified in other major regions of the Late Mesozoic Central Asia magmatic province. This indicates that the areal undoubtedly belongs to the latter. These facts support the conclusion that the correlation observed through the zone’s evolution between reduction in the volume of igneous products and the change in their composition towards the OIB was apparently determined by a decrease in the effect of thermal sublithospheric mantle melts upon a metasomatically enriched lithospheric mantle, leading to its gradual elimination from the magma sources.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
V. V. Yarmolyuk, V. I. Kovalenko, and V. G. Ivanov, Geotektonika, No. 5, 41–67 (1995).
V. V. Yarmolyuk, E. A. Kudryashova, A. M. Kozlovsky, et al., J. Asian Earth Sci. 111, 604–623 (2015).
F. M. Stupak, V. V. Yarmolyuk, E. A. Kudryashova, and V. A. Lebedev, Russ. J. Pac. Geol. 12 (6), 539–548 (2018).
A. A. Vorontsov, V. V. Yarmolyuk, and T. Yu. Komaritsyna, Russ. Geol. Geophys. 57 (5), 723–744 (2016).
A. A. Vorontsov and V. V. Yarmolyuk, J. Volcanol. Seismol. 1 (4), 213–236 (2007).
A. Bars, L. Miao, Zh. Fochin, et al., Geol. J. 53, 2449–2470 (2018).
B. Dash, A. Yin, N. Jiang, et al., Gondwana Res. 27, 281–299 (2013).
D. I. Frikh-Khar and A. I. Luchitskaya, Late Mesozoic Volcanic Rocks and Related Hypabyssal Intrusions of Mongolia (Nauka, Moscow, 1978) [in Russian].
F. M. Stupak, E. A. Kudryashova, V. A. Lebedev, and Yu. V. Gol’tsman, Volcanol. Seismol. 12 (1), 34–46 (2018).
V. V. Yarmolyuk, V. G. Ivanov, and V. I. Kovalenko, Petrology 6, 101 (1998).
S.-S. Sun and W. F. McDonough, Geol. Soc. London Special Publ., No. 42, 313–345 (1989).
I. V. Chernyshev, V. A. Lebedev, and M. M. Arakelyants, Petrology 14 (1), 62 (2006).
Funding
This work was performed at the Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, within the framework of a State Contract, no. 0136–2019-0012, and with the support of the Russian Foundation for Basic Research, project no. 17–05–00167.
Author information
Authors and Affiliations
Corresponding authors
Additional information
Translated by A. Larionov
Rights and permissions
About this article
Cite this article
Yarmolyuk, V.V., Kudryashova, E.A. & Kozlovsky, A.M. Late Stages in the Evolution of the Late Mesozoic East Mongolian Volcanic Areal: Rock Age and Composition. Dokl. Earth Sc. 487, 773–777 (2019). https://doi.org/10.1134/S1028334X19070298
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028334X19070298