Changes in Initial 87Sr/86Sr Ratio during Protracted Fractionation in Igneous Complexes

1 May 1980

journal article
Published by Oxford University Press (OUP) in Journal of Petrology

Vol. 21 (2) , 245-264
https://doi.org/10.1093/petrology/21.2.245

Abstract

The Rb/Sr ratios of magmas increase significantly during fractional crystallization. Hence, the rate of change of the ⁸⁷Sr/⁸⁶Sr ratio in successive residual liquids increases as crystallization proceeds. In slowly solidifying igneous complexes the total change in ⁸⁷Sr/⁸⁶Sr ratio exceeds analytical uncertainty and is manifested in several ways.

Keywords

CRYSTALLIZATION
87SR/86SR RATIO
MAGMAS
UNCERTAINTY
RB/SR
SOLIDIFYING
SLOWLY
PROTRACTED
PROCEEDS

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