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. 2020 Jan 6;378(2165):20180425. doi: 10.1098/rsta.2018.0425

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© 2020 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — (a) Core section of metabasite (U1496B-10F-2 W, 6–8 cm). (b) Photomicrograph in plane-polarized light of metabasite in (a) with euhedral-subhedral titanaugite (Cpx) and plagioclase (Pl) with equigranular texture. Labelled, altered plagioclase shows relict albite twin. (c) Provenance plot of vanadium versus titanium/1000 [54] for metamorphosed basalts recovered from the IODP Exp. 366 Sites labelled in legend on figure. The points shown by circles were analysed by pXRF (shipboard, hand-held XRF), others were analysed as labelled (tables 2 and 3). Arc, Island arc tholeiitic basalt; MORB; mid-ocean ridge basalt; Alkalic/OIB, ocean island basalt.