Corrigendum to “Formation age of the dual structure and environmental change recorded in hydrogenetic ferromanganese crusts from Northwest and Central Pacific seamounts” [Ore Geol. Rev. (2016)]

Nishi, Keisuke; Usui, Akira; Nakasato, Yoshio; Yasuda, Hisato

doi:10.1016/j.oregeorev.2017.03.023

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“…Submarine Fe-Mn crusts and nodules are chemical sedimentary rocks mainly comprising Fe and Mn (oxyhydr)oxides with a small amount of detrital materials (e.g., [1]) that record paleoenvironmental information about the ocean (e.g., [2][3][4][5][6]). They simultaneously provide geochronological information based on the variations in their chemical (e.g., Co content) and isotopic (e.g., 10 Be/ 9 Be and 187 Os/ 188 Os) compositions [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

87Sr/86Sr Isotopic Ratio of Ferromanganese Crusts as a Record of Detrital Influx to the Western North Pacific Ocean

et al. 2022

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In this study, the Sr isotope ratios (IRs; 87Sr/86Sr) of ferromanganese (Fe–Mn) crusts are analyzed through laser ablation inductively coupled plasma multiple-collector mass spectrometry. A sample collected from off Minamitorishima Island showed uniform Sr IRs (0.70906–0.70927) similar to that of present-day seawater with more than 36 mm thickness. Meanwhile, a detritus-rich sample collected from off northeast (NE) Japan showed a wide variation in Sr IRs (0.707761–0.709963). The Sr IR variation in the Fe–Mn crust from off NE Japan suggests detrital influx contributions from both the NE Japan arc (<0.708) and aeolian dust from China (>0.718). Detrital flux from the NE Japan arc increases from the bottom to middle layers, possibly due to the uplift of the Ou backbone range that occurred after ~2 Ma. The increased influx of the aeolian dust in the outer layer is attributable to global cooling in the Quaternary that increased the loess dust transportation from China to the western North Pacific Ocean. Meanwhile, the influence of the detrital influx on the sample from off Minamitorishima Island appeared to be negligible. The Sr IR analysis with high spatial resolution proposed in this study possibly improves the burial history of Fe–Mn nodules.

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