Plagioclasites from chromite-bearing ultramafic rocks of the Rai-Iz massif

The corundum-bearing and without-corundum plagioclasites from chromite-bearing ultramafic rocks of Rai-Iz massif were studied. Chemical composition of the rock-forming minerals and rock geochemical characteristics was determined. The U-Pb zircon dating (using SHRIMP-II microprobe) of plagioclasites...

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Bibliographic Details
Published in:Литосфера
Main Authors: N. V. Vakhrusheva, K. S. Ivanov, A. E. Stepanov, S. P. Shokalsky, A. N. Azanov, V. V. Hiller, P. B. Shiryayev
Format: Article
Language:English
Published: A.N. Zavaritsky Institute of Geology and Geochemistry 2016-01-01
Subjects:
ультрамафиты
плагиоклазиты
Полярный Урал
цирконы
U-Pb датирование
возраст
палеозой
ultramafic rocks
plagioclasites
Polar Urals
zircons
U-Pb dating
age
Paleozoic
Online Access:https://test.lithosphere.ru/jour/article/view/47
Description
Summary:The corundum-bearing and without-corundum plagioclasites from chromite-bearing ultramafic rocks of Rai-Iz massif were studied. Chemical composition of the rock-forming minerals and rock geochemical characteristics was determined. The U-Pb zircon dating (using SHRIMP-II microprobe) of plagioclasites yielded an age of 398 ± 3 and 404.4 ± 2.8 Ma - Lower-Middle Devonian boundary. At that time on the background of powerful collision it occurred a deep metamorphic processing of Rai-Iz ultramafic rocks resulting in forming of high-chromium chromite ore and separation of vein-series represented by substantially plagioclase rocks with corundum (ruby) mineralization.
ISSN:1681-9004
2500-302X

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