High-Alumina Hypersthene in a Basalt Flow from Mt. Sundook, Siberian Traps, Russia
Keywords:
High-Alumina Hypersthene, Basalt, Siberian Traps, Mt. Sundook, Russia.Abstract
Electron probe microanalysis (EPMA) and preliminary x- ray diffraction studies on a basalt flow from Mt.Sundook have revealed the presence of rare high-alumina hypersthene in the groundmass. The basalt occurs at the base of a 800 m flow sequence (Ivakinsky and Syverminsky suite) that unconformably overlies a Permo-Carboniferous sedimentary sequences. It is postulated that besides normal processes of fractionation, assimilation-fractional Crystallization (AFC) processes involving the parental magma and crustal components (pelitic sedinientary rocks) were responsible for the formation of hypersthene in the basalt. The presence of a complex feldspar and pyroxene assemblage may also be an additional evidence for the operation of such an AFC process.Downloads
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Research Papers
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Published
1993-06-01
How to Cite
Murari, R., Krishnamurthy, P., Gopalan, K. S., Nesterekno, G. V., & Tihonenko, P. I. (1993). High-Alumina Hypersthene in a Basalt Flow from Mt. Sundook, Siberian Traps, Russia. Journal of Geological Society of India, 41(6), 509–512. Retrieved from http://www.geosocindia.com/index.php/jgsi/article/view/67470