The influence of melt flux and crustal processing on Re-Os isotope systematics of ocean island basalts : constraints from Galápagos.

• Published in: Earth and Planetary Science Letters
• Main Authors: Gibson, S.A., Dale, C.W., Geist, D.J., Day, J.A., Brügmann, G., Harpp, K.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier 2016
• Subjects: Bouvet; Pacific; St. Helena; Tristan; Iceland; Ocean Island
• Online Access: http://dro.dur.ac.uk/18764/; http://dro.dur.ac.uk/18764/3/18764P.pdf; http://dro.dur.ac.uk/18764/1/18764.pdf; http://dro.dur.ac.uk/18764/2/18764.pdf; https://doi.org/10.1016/j.epsl.2016.05.021

Galápagos basalts with the most radiogenic 187Os/188Os (up to 0.1875) typically have moderate MgO (7–9 wt.%) and low Os (<50 pg g−1) but have contrastingly unenriched Sr, Nd and Pb isotope signatures. We interpret this decoupling of chalcophile and lithophile isotopic systems as due to assimilati...