Geochemistry of a Pliocene–Pleistocene oceanic-arc plutonic complex, Guadalcanal

Abstract

The Koloula Igneous Complex, on the island of Guadalcanal, consists of a low-K calc-alkaline sequence of 26 different intrusive phases. The major intrusions are characterized by K/Rb>400, Rb/Sr<0.06, δ18O of 5.7 to 7.2 and uniform 87Sr/86Sr of 0.70372. This article presents the first data describing oxygen and strontium isotopic behaviour within a plutonic suite that formed by crystal fractionation.

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Chivas, A., Andrew, A., Sinha, A. et al. Geochemistry of a Pliocene–Pleistocene oceanic-arc plutonic complex, Guadalcanal. Nature 300, 139–143 (1982). https://doi.org/10.1038/300139a0

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