Riftogenic magmatism of western part of the Early Mesozoic Mongolian–Transbaikalian igneous province: Results of geochronological studies
- Authors: Yarmolyuk V.V.1, Kozlovsky A.M.1, Salnikova E.B.2, Travin A.V.3,4,5, Kudryashova E.A.1
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Affiliations:
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
- Institute of Precambrian Geology and Geochronology
- Sobolev Institute of Geology and Mineralogy, Siberian Branch
- Novosibirsk State University
- Tomsk State University
- Issue: Vol 475, No 2 (2017)
- Pages: 872-876
- Section: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/190450
- DOI: https://doi.org/10.1134/S1028334X17080293
- ID: 190450
Cite item
Abstract
Geochronological studies of rocks from a bimodal high-alkali volcanic–plutonic complex collected in the area of Kharkhorin zone of the Early Mesozoic Mongolian–Transbaikalian igneous province (MTIP) are made. The age of alkali granites from Olziit sum is 211 ± 1 Ma (U–Pb ID-TIMS on zircon) to 209 ± 2 and 217 ± 4 Ma (40Ar/39Ar on alkali amphibole); the age of alkali granite-porphyries from the area of Sant sum is 206 ± 1 Ma (U–Pb ID-TIMS on zircon). These rock series formed syncronously to the analogous magmatism episode in the Northern Gobi and Western Transbaikalian rift zones of the MTIP. The similarity of the age and composition of igneous associations of the MTIP suggests a common mechanism of its formation related to the effect of a mantle plume on the continental lithosphere at the base of the entire igneous zone having a zonal structure.
About the authors
V. V. Yarmolyuk
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: amk@igem.ru
Russian Federation, Moscow
A. M. Kozlovsky
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Author for correspondence.
Email: amk@igem.ru
Russian Federation, Moscow
E. B. Salnikova
Institute of Precambrian Geology and Geochronology
Email: amk@igem.ru
Russian Federation, St. Petersburg
A. V. Travin
Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University; Tomsk State University
Email: amk@igem.ru
Russian Federation, Novosibirsk; Novosibirsk; Tomsk
E. A. Kudryashova
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: amk@igem.ru
Russian Federation, Moscow