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Journal of Radioanalytical and Nuclear Chemistry

, Volume 278, Issue 2, pp 343–347 | Cite as

Determination of boron and other elements in volcanic rocks by prompt gamma-ray analysis: An application to magma genesis in Kyushu island, SW-Japan

  • M. MiyoshiEmail author
  • M. Shimono
  • T. Hasenaka
  • T. Sano
  • T. Fukuoka
Geochemistry and Cosmochemistry

Abstract

Neutron induced prompt gamma-ray activation analysis (PGAA) is applied for determining boron contents in volcanic rocks, which is an important element in the discussion of material circulation in volcanic arc systems. To evaluate the recycling of oceanic crust in Kyushu, we analyzed boron and other trace element contents in basaltic rocks from the area. The basalts from volcanic front have high B/Nb (2.9–3.7), B/Zr (0.1–0.2) and B/Sm (2.8–6.0) ratios, whereas those ratios in the basalts from backarc are extremely low (<0.5; <0.1; 0.5–1.7), respectively. This indicates that the recycling of subducted oceanic crust to the arc crust is limited in the volcanic front.

Keywords

Volcanic Rock Oceanic Crust Trace Element Content Basaltic Rock Oceanic Island Basalt 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC. 2008

Authors and Affiliations

  • M. Miyoshi
    • 1
    Email author
  • M. Shimono
    • 1
  • T. Hasenaka
    • 1
  • T. Sano
    • 2
  • T. Fukuoka
    • 3
  1. 1.Graduate School of Science and TechnologyKumamoto UniversityKumamotoJapan
  2. 2.National Museum of Nature and ScienceTokyoJapan
  3. 3.Department of Environmental SystemsRissho UniversityKumagaya, SaitamaJapan

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