Riftogenic magmatism of western part of the Early Mesozoic Mongolian–Transbaikalian igneous province: Results of geochronological studies


Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

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.

Авторлар туралы

V. Yarmolyuk

Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry

Email: amk@igem.ru
Ресей, Moscow

A. Kozlovsky

Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry

Хат алмасуға жауапты Автор.
Email: amk@igem.ru
Ресей, Moscow

E. Salnikova

Institute of Precambrian Geology and Geochronology

Email: amk@igem.ru
Ресей, St. Petersburg

A. Travin

Sobolev Institute of Geology and Mineralogy, Siberian Branch; Novosibirsk State University; Tomsk State University

Email: amk@igem.ru
Ресей, Novosibirsk; Novosibirsk; Tomsk

E. Kudryashova

Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry

Email: amk@igem.ru
Ресей, Moscow

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