@article{973fac1b10f34d658c320964b69e0e08,
title = "A paleogene magmatic overprint on cretaceous seamounts of the Western Pacific",
abstract = "The West Pacific Seamount Province (WPSP) represents a series of short-lived Cretaceous hotspot tracks. However, no intraplate volcanoes in advance of petit-spot volcanism erupted near a trench have been identified after the formation of the WPSP on the western Pacific Plate. This study reports new ages for Paleogene volcanic edifices within the northern WPSP, specifically the Ogasawara Plateau and related ridges, and Minamitorishima Island. These Paleogene ages are the first reported for basaltic rocks on western Pacific seamounts, in an area that has previously only yielded Cretaceous ages. The newly found Paleogene volcanisms overprint the Early–middle Cretaceous volcanic edifices, because the seamount or paleo-island material-covered reefal limestone caps on these edifices are uniformly older than the Paleogene volcanism identified in this study. This study outlines several possible causative factors for the Paleogene volcanism overprinting onto existing Cretaceous seamounts, including volcanism related to lithospheric stress, or a younger hotspot track within the northern part of the WPSP that records magmatism from ~60 Ma.",
keywords = "Alkali-basalt, Hotspot, Pacific plate, Paleogene, Petit-spot, Rejuvenation, Seamount",
author = "Naoto Hirano and Hirochika Sumino and Taisei Morishita and Shiki Machida and Takaomi Kawano and Kazutaka Yasukawa and Takafumi Hirata and Yasuhiro Kato and Teruaki Ishii",
note = "Funding Information: Japan Society for the Promotion of Science, Grant/Award Numbers: 17K05715, 18H03733, 22740350, 24654180; Toray Science and Technology Grant, Toray Science Foudation, Grant/Award Number: 11-5208. Funding Information: We thank captains and the crews on the R/Vs Yokosuka, Hakuho-Maru, Takuyo and the submersible Shinkai 6500, as well as the onboard scientific party. This work has been carried out in part under the visiting researcher's programs both of Institute for Integrated Radiation and Nuclear Science, Kyoto University, and the Radioisotope Center, the University of Tokyo. We also took place the irradiation of samples both at the Institute for Integrated Radiation and Nuclear Science, Kyoto University, and the Institute for Material Research, Tohoku University (Oarai Branch). We also thank Prof. Kazuo Saito, Yamagata University, and Mr Kazuki Watanabe, Japan Coast Guard, for their helps to analyze dating and to provide the submarine rock samples. The authors acknowledge Toray Science and Technology Grant, Toray Science Foundation (Grant Number 11–5208) and Japan Society for the Promotion of Science (Grant Numbers 22740350, 24654180, 17K05715, 18H03733). Publisher Copyright: {\textcopyright} 2021 The Authors. Island Arc published by John Wiley & Sons Australia, Ltd.",
year = "2021",
month = jan,
day = "1",
doi = "10.1111/iar.12386",
language = "English",
volume = "30",
pages = "1--16",
journal = "Island Arc",
issn = "1038-4871",
publisher = "John Wiley and Sons Inc.",
number = "1",
}