- abstract:
The recently published paper by Kimura et al. [2014] reports geochemical and isotopic analyses of Quaternary adakitic dacites (ADK) from two volcanic groups, Daisen and Aonoyama, in southwest (SW) Japan. Based on Pb isotope compositions, these authors suggest that crustal assimilation played a major role in the genesis of ADK. This conclusion differs from that of an earlier study by Feineman et al. [2013], who advocated only a minimal crustal effect and concluded that the Pb isotope array for Daisen ADK can be attributed to partial melting of the subducting slab with a significant amount of sediment. The Pb isotope trends for Daisen ADK presented in these two studies are clearly different and Kimura et al. [2014] did not directly compare the date sets or provide any explanation for the differences. In this comment, we critically examine the differences between the Pb isotope date sets presented by Feineman et al. [2013] and Kimura et al. [2014]. We present new date for Aonoyama ADK and we provide an explanation for the discrepancy between the date obtained in our lab and in this other recently published study.
Kimura, J.-l., et al. (2014) Diverse magmatic effects of subducting a hot slab in SW Japan: Results from forward modeling, Geochem. Geophys. Geosyst., 15,691-739, doi:10.1002/2013GC005132.
Feineman, M., T. Moriguti, T. Yokoyama, S. Terui, and E. Nakamura (2013), Sediment-enriched adakitic magmas from the Daisen volcanic field, Southwest Japan, Geochem. Geophys. Geosyst., 14, 3009-3031, doi:10.1002/ggge.20176.
- doi: 10.1002/2015GC005914
- modified at 2021-06-02
@article{20150910180659-209646,
author = "Pineda-Velasco, I. and Nguyen, Tai Truong and Kitagawa, Hiroshi and Nakamura, Eizo",
title = "Comment on Diverse magmatic effects of subducting a hot slab in SW Japan: Results from forward modeling by J.-I. Kimura et al.",
journal = "Geochemistry, Geophysics, Geosystems",
year = "2015",
number = "9",
volume = "16",
pages = "2848-2852",
doi = "10.1002/2015GC005914",
}