MINERALOGY OF KHENTEI RIDGE ALKALINE PICROBASALTS (SOUTHERN TRANSBAIKALIA)
https://doi.org/10.21285/2541-9455-2018-41-1-66-78
Abstract
The purpose of the paper is to determine the crystallization order of rocks based on the study of the mineralogical and petrographic composition of the Khentei Range Cenozoic basaltoids. Methods. A microprobe X-ray spectral analysis by means of the JXA-8200 tool (JEOL Ltd., Japan) has been used in the study. Results. The research results in the determination of chemical compositions of rock-forming minerals and the sequence of minerals formation. Conclusions. Melt movement to the surface was accompanied with the capturing of mantle xenoliths. Olivine and pyroxene of the first generation were formed first, then, olivine and pyroxene of the second generation were formed, as well as oxide bearing minerals. Plagioclase, potassium feldspar, nepheline and leucite were crystallized last from the interstices. The presence of residual glass has also been noticed in the interstices.
About the Authors
V. Boroldoeva
Vinogradov Institute of Geochemistry SB RAS
Russian Federation
Russian Federation
Postgraduate student of the Laboratory of Basic and Ultrabasic Magmatism
1a Favorsky St., Irkutsk 664033, Russian Federation
A. Medvedev
Vinogradov Institute of Geochemistry SB RAS
Russian Federation
Russian Federation
Chief Researcher of the Laboratory of Basic and Ultrabasic Magmatism
1a Favorsky St., Irkutsk 664033, Russian Federation
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Review
For citations:
Boroldoeva V., Medvedev A. MINERALOGY OF KHENTEI RIDGE ALKALINE PICROBASALTS (SOUTHERN TRANSBAIKALIA). Earth sciences and subsoil use. 2018;41(1):66-78. (In Russ.) https://doi.org/10.21285/2541-9455-2018-41-1-66-78
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