Open AccessThermal history of the Guli pluton (north of the Siberian platform) according to apatite fission-track dating and computer modeling
Author(s) -
M. S. Myshenkova,
В. А. Зайцев,
Stuart Thomson,
А. В. Латышев,
В. С. Захаров,
Tatyana Bagdasaryan,
R.V. Veselovsky
Publication year - 2020
Publication title -
geodinamika i tektonofizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.336
H-Index - 8
ISSN - 2078-502X
DOI - 10.5800/gt-2020-11-1-0464
Subject(s) - pluton , fission track dating , geology , carbonatite , massif , geochemistry , apatite , tectonics , paleontology , mantle (geology)
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.