THERMAL HISTORY OF THE GULI PLUTON (NORTH OF THE SIBERIAN PLATFORM) ACCORDING TO APATITE FISSION-TRACK DATING AND COMPUTER MODELING

THERMAL HISTORY OF THE GULI PLUTON (NORTH OF THE SIBERIAN PLATFORM) ACCORDING TO APATITE FISSION-TRACK DATING AND COMPUTER MODELING

We present the first results of fission-track dating of apatite monofractions from two rock samples taken from the Southern carbonatite massif of the world’s largest alkaline ultrabasic Guli pluton (~250 Ma), located within the Maymecha-Kotuy region of the Siberain Traps. Based on the apatite fissio...

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Bibliographic Details
Main Authors: M. S. Myshenkova, V. A. Zaitsev, S. Thomson, A. V. Latyshev, V. S. Zakharov, T. E. Bagdasaryan, R. V. Veselovsky
Format: Article
Language:English
Published: Institute of the Earth's crust, Siberian Branch of RAS 2020-03-01
Series:Geodinamika i Tektonofizika
Subjects:
siberian platform
guli pluton
thermal evolution
fission-track dating
apatite
Online Access:https://www.gt-crust.ru/jour/article/view/986
Description
Summary:We present the first results of fission-track dating of apatite monofractions from two rock samples taken from the Southern carbonatite massif of the world’s largest alkaline ultrabasic Guli pluton (~250 Ma), located within the Maymecha-Kotuy region of the Siberain Traps. Based on the apatite fission-track data and computer modeling, we propose two alternative model of the Guli pluton's tectonothermal history. The models suggest (1) rapid post-magmatic cooling of the studied rocks in hypabyssal conditions at depth about 1.5 km, or (2) their burial under a 2-3 km thick volcano-sedimentary cover and reheating above 110°C, followed by uplift and exhumation ca. 218 Ma.
ISSN:2078-502X

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