Puchelt, H., Murad, E. and Hubberten, H.-W. (1977) Geochemical and petrological studies of lavas, pyroclastica and associated xenoliths from the Christiana Islands, Aegean Sea. Neues Jahrbuch Für Mineralogie - Abhandlungen, 131 (2). pp. 140-155.

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Abstract

Geochemical and petrological investigations of the volcanic islands of
Christiana proved their genetic connection with the calc-alkaline volcanism of the
Santorini group and the submarine Kolombos volcano. The lavas of Christiana
range from andesite to dacite while pumice is of rhyolithic chemistry. Rather
constant K/Rb ratios indicate consanguine magmas.
Increased Ni, Cr and Mg concentrations in several lavas indicate a certain
admixture of peridotite material to the calc-alkaline magmas.
Xenoliths found below an autochthonous pumice layer prove penetration of
granites, phyllites and limestone by the rising magma. The geochemical investigations
support a subduction type origin of the volcanic material of the Christiana
Islands.

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