Affiliation:
1. M.V. Lomonosov Moscow State University
2. V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry of RAS
3. University of Arizona
4. M.V. Lomonosov Moscow State University;
O.Yu. Schmidt Institute of Physics of the Earth of RAS
Abstract
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.
Publisher
Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences
Subject
Earth-Surface Processes,Geophysics
Cited by
7 articles.
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