Quaternary caldera-forming eruptions at the Sanzugawa caldera, NE Japan, revealed by zircon U-Pb geochronology

Author:

Ito Hisatoshi

Abstract

Recent application of zircon U-Pb geochronology has contributed to deciphering the evolution of caldera systems worldwide. However, in the Tohoku region, NE Japan, this is not the case, although it is well studied as a typical island arc subduction system. Here, U-Pb dating of zircon suggests that the Sanzugawa caldera, the largest caldera in Tohoku since late Miocene, initiated its caldera-forming volcanic activity at ∼7 Ma and culminated its activity in late Pliocene to Quaternary (3.0–1.5 Ma). This is contrary to a previous notion that the caldera developed in late Miocene to Pliocene (6–3 Ma) based on mainly whole-rock K-Ar dating results. This finding may also question a current hypothesis of relatively subdued volcanism at 3.5–1.5 Ma in NE Japan and thus shows the need to date other calderas in the Tohoku region with zircon U-Pb and/or Ar-Ar methods to better understand the magmatic history of this region.

Funder

Central Research Institute of Electric Power Industry

Publisher

Frontiers Media SA

Subject

General Earth and Planetary Sciences

Reference47 articles.

1. Structural control on late Miocene to Quaternary volcanism in the NE Honshu arc, Japan;Acocella;Tectonics,2008

2. Innai Caldera Complex composed of Valles type caldera and Glen-coe type caldera;Aizawa,1999

3. LA-MC-ICPMS and SHRIMP U–Pb dating of complex zircons from Quaternary tephras from the French Massif Central: Magma residence time and geochemical implications;Cocherie;Geochim. Cosmochim. Acta,2009

4. U-Pb dating of zircon in the Bishop Tuff at the millennial scale;Crowley;Geology,2007

5. History of the explosive volcanism of the Tohoku arc from core sediment samples of the Japan Trench;Fujioka;Bull. Volcanol. Soc. Jpn.,1983

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