Geochemistry of dike rocks of the Argentine Islands and the near area of the Antarctic Peninsula (Western Antractica)
DOI:
https://doi.org/10.15407/dopovidi2018.06.073Keywords:
Antarctic Peninsula, Argentine Islands, cumulates, dikes, multielement diagram, REEAbstract
The dike rocks in the area of the Argentine Islands and the near part of the Antarctic Peninsula by geochemical characteristics are mature island-arc matter of calc-alkaline formations that were formed moderate depths due to the melting of a metasomatic mantle source. The primitive (outgoing) melts are, probably, close by the composition to high-magnesium dike rocks. Variations in the composition of dike basites can be associa ted with the fractional crystallization with clinopyroxene admixtures dominant in liquidase to ∼ 5% by weight, and after — plagioclase, hornblende, and ore minerals (probably, titanomagntite). The products of deep mantle (plum) sources in the selected samples were not detected.
Downloads
References
Scarrow, J. H., Leat, P. T., Wareham, C. D. & Millar, I. L. (1998). Geochemistry of mafic dykes in the Antarctic Peninsula continental-margin batholith: a record of arc evolution. Contrib. Mineral. Petrol., 131, pp. 289-305. doi: https://doi.org/10.1007/s004100050394
Bakhmutov, V. G., Gladkochub, D. P. & Shpyra, V. V. (2013). Age position, geodynamic specifics and paleo magnetism of intrusive complexes of the western coast of the Antarctic Peninsula. Geofiz. J., 35, No3, pp. 3-30 (in Russian).
Elliot, D. H. (1964). The petrology of the Argentine islands. British Antarctic survey, Scientific reports No 41. London: British Antarctic survey.
Wood, D. A. (1980). The application of a Th—Hf—Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary Volcanic Province. Earth Planet. Sci. Lett., 50, pp. 11-30. doi: https://doi.org/10.1016/0012-821X(80)90116-8
Pearce, J. A. & Peate, D. W. (1995). Tectonic implication of the composition of volcanic arc magmas. Annu. Rev. Earth Planet. Sci., 23, pp. 251-285. doi: https://doi.org/10.1146/annurev.ea.23.050195.001343
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 Reports of the National Academy of Sciences of Ukraine
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
