11:45 AM - 12:00 PM
[BPT05-23] Genesis and distribution of rare-earth elements and yttrium-rich mud in the South Pacific Ocean
Keywords:REY-rich mud, deep-sea mineral resources, IODP Exp. 329, bulk chemical composition, South Pacific Ocean
In striking contrast to the substantial progress in the North Pacific Ocean, REY-rich muds in the South Pacific Ocean has still not been well understood, even though their high ΣREY concentrations (> 2000 ppm) . This is, at least in part, due to the lack of sediment cores recovered from the South Pacific Ocean (especially southern part of the South Pacific Ocean). IODP cores recovered by Exp. 329  can provide a unique opportunity to elucidate genesis and distribution of REY-rich mud in the South Pacific Ocean.
In this study, we present the results of geochemical analysis of sediment samples obtained from the IODP Exp. 329 cores and discuss the distribution, stratigraphic position, and constituting components of the South Pacific Ocean REY-rich mud. We also compare our results with those in the North Pacific Ocean.
References :  Kato et al. (2011) Nature Geoscience 4, 535-539.  Iijima et al. (2016) Geochemical Journal 50, 557-573.  Nakamura et al. (2016) JpGU Abstract.  Mimura et al. (2017) JpGU Abstract.  D’Hondt et al. (2011) Proc. IODP, vol. 329.