The Determining of the Nature of Magmatic Encalves in Granites of Malayer Plutonic Complex based on Geochemical and Statistical Methods

Deevsalar, R.; Valizadeh, M. V.; Ahadnejad, V.

doi:10.22071/gsj.2012.54535

Document Type : Original Research Paper

Authors

¹ Faculty of Basic Sciences, Department of Geology, Tarbiat Modares University,Tehran, Iran

² College of Science Faculty of Geology, University of Tehran, Tehran, Iran‍2

³ Payame Noor University, Tehran. Iran

https://doi.org/10.22071/gsj.2012.54535

Abstract

Granitic rocks of Malayer plutonic complex contain varieties of enclaves with different shapes, sizes, mineralogy andchemical composition. The interpretation of bivariant geochemical diagrams of major oxides and trace elements with respect to higher values of some of oxides such as MnO, TiO₂, MgO, CaO& FeO_t than host rocks in one groups of enclaves and moreover linear trend of these oxides and some of trace elements such as Ni, Cr, V indicate to different nature and mafic source of these enclaves (Mafic type) than host rocks and other enclaves (Felsic type).The study of chemical composition of this enclaves by using of univariant and bivariant statistical methods (bivariant regression analysis, correlation coefficients, cluster analysis and principle component analysis) indicate clear chemical contrast between mafic enclaves with felsic enclaves and granitic host rocks and in other side chemical affinity of felsic enclaves and their host rocks. Distinctive distribution of the majority of oxides and trace elements of mafic enclaves and host rocks and low values for R² in regression analysis, low value of correlation coefficient of major element oxides and trace elements between enclaves and their host rocks, separate position of samples in cluster pattern and special direction of variants and samples of vectors in bivariant diagram of principle component analysis (PCA) are outputs of different geochemical characteristics of enclaves and host rocks. Moreover this correlates with different trends of each major oxides and trace elements in bivariant geochemical diagram (Harker diagram).

Keywords

20.1001.1.10237429.1391.21.83.16.7

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Scientific Quarterly Journal of Geosciences

The Determining of the Nature of Magmatic Encalves in Granites of Malayer Plutonic Complex based on Geochemical and Statistical Methods

References

References

Volume 21, Issue 83
December 2012
Pages 129-140

The Determining of the Nature of Magmatic Encalves in Granites of Malayer Plutonic Complex based on Geochemical and Statistical Methods

References

References

Volume 21, Issue 83December 2012Pages 129-140

Volume 21, Issue 83
December 2012
Pages 129-140