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Cluster Analysis of Mineral-chemical Data of Basaltic Rocks from Linga, Eastern Deccan Volcanic Province (EDVP) and its Petrogenetic Implications

  • Original Article
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Journal of the Geological Society of India

Abstract

Cluster analysis studies based on electron microprobe data of phenocryst mineral phases (namely olivine, clinopyroxene and plagioclase) of basaltic rocks around Linga (21° 58′ N: 78° 56′ E), eastern Deccan volcanic province have been carried out for the first time. Based on highly significant correlation coefficients obtained for relevant major oxides of phenocrystal mineral phases, it is suggested that mineralogical parameters such as Fo% in olivine, Ca/Mg# in clinopyroxene and An% of plagioclase play important role to decipher the evolution of the phase chemistry. Those highly significant major oxides were subjected to multivariate statistical analysis, involving hierarchical segmentation, cluster analysis and construction of dendrograms. For each of the minerals, the clusters decrease systematically. The ultimate cluster patterns may either correspond to liquid immiscibility-related intraflow chemical variation or to multiple staged magmatic emplacements.

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Acknowledgement

The field work in connection with the present study was partly supported by DST-SERB research grant (SERB/F/12254/2018-2019) given to JR. The authors are grateful to Dr. Ashutosh Pandey for critically reviewing an earlier version of this paper.

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Correspondence to Jyotisankar Ray.

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Ganguly, S., Dey, P., Ray, J. et al. Cluster Analysis of Mineral-chemical Data of Basaltic Rocks from Linga, Eastern Deccan Volcanic Province (EDVP) and its Petrogenetic Implications. J Geol Soc India 98, 1513–1518 (2022). https://doi.org/10.1007/s12594-022-2206-8

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  • DOI: https://doi.org/10.1007/s12594-022-2206-8

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