Articles | Volume 11, issue 1
https://doi.org/10.5194/se-11-23-2020
https://doi.org/10.5194/se-11-23-2020
Research article
 | 
07 Jan 2020
Research article |  | 07 Jan 2020

Alkali basalt from the Seifu Seamount in the Sea of Japan: post-spreading magmatism in a back-arc setting

Tomoaki Morishita, Naoto Hirano, Hirochika Sumino, Hiroshi Sato, Tomoyuki Shibata, Masako Yoshikawa, Shoji Arai, Rie Nauchi, and Akihiro Tamura

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Tomoaki Morishita on behalf of the Authors (15 Oct 2019)  Author's response   Manuscript 
ED: Publish subject to minor revisions (review by editor) (16 Oct 2019) by Johan Lissenberg
AR by Tomoaki Morishita on behalf of the Authors (28 Oct 2019)  Author's response 
ED: Publish subject to technical corrections (07 Nov 2019) by Johan Lissenberg
ED: Publish subject to technical corrections (11 Nov 2019) by Joachim Gottsmann (Executive editor)
AR by Tomoaki Morishita on behalf of the Authors (14 Nov 2019)  Author's response   Manuscript 

Post-review adjustments

AA: Author's adjustment | EA: Editor approval
AA by Tomoaki Morishita on behalf of the Authors (16 Dec 2019)   Author's adjustment   Manuscript
EA: Adjustments approved (06 Jan 2020) by Johan Lissenberg
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Short summary
We report a peridotite xenolith-bearing basalt dredged from the Seifu Seamount (SSM basalt) in the northeast Tsushima Basin, southwest Sea of Japan, which is one of the western Pacific back-arc basin swarms. An 40Ar / 39Ar plateau age of 8.33 ± 0.15 Ma (2 σ) was obtained for the SSM basalt, indicating that it erupted shortly after the termination of back-arc spreading. The SSM basalt was formed in a post-back-arc extension setting by the low-degree partial melting of an upwelling asthenosphere.