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...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
A.N. Zavaritsky Institute of Geology and Geochemistry
2016-01-01
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| Series: | Литосфера |
| Subjects: | |
| Online Access: | https://test.lithosphere.ru/jour/article/view/47 |
| 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. |
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| ISSN: | 1681-9004 2500-302X |