Geochemistry of dike rocks of the Argentine Islands and the near area of the Antarctic Peninsula (Western Antractica)

TitleGeochemistry of dike rocks of the Argentine Islands and the near area of the Antarctic Peninsula (Western Antractica)
Publication TypeJournal Article
Year of Publication2018
AuthorsArtemenko, GV
Abbreviated Key TitleDopov. Nac. akad. nauk Ukr.
DOI10.15407/dopovidi2018.06.073
Issue6
SectionGeosciences
Pagination73-82
Date Published6/2018
LanguageRussian
Abstract

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.

KeywordsAntarctic Peninsula, Argentine Islands, cumulates, dikes, multielement diagram, REE
References: 
  1. 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
  2. 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).
  3. Elliot, D. H. (1964). The petrology of the Argentine islands. British Antarctic survey, Scientific reports No 41. London: British Antarctic survey.
  4. 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
  5. 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