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.

中文翻译：

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西太平洋白垩纪海山的古近纪岩浆套印

西太平洋海山省（WPSP）代表了一系列短暂的白垩纪热点轨道。但是，在西太平洋板块WPSP形成之后，尚未发现在沟附近爆发小点火山之前的板内火山。这项研究报告了北部WPSP（特别是小gas原高原和相关山脊）和Minamitorishima岛内古近纪火山大厦的新纪元。这些古近纪年龄是西方太平洋海山上玄武岩的首次报道，该地区以前仅产生白垩纪年龄。新近发现的古近纪火山岩覆盖了早白垩纪至中期的火山岩，因为这些建筑物上的海山或古岛物质覆盖的礁石灰岩盖均比本研究中确定的古近纪火山作用统一。这项研究概述了古近纪火山岩叠印到现有白垩纪海山上的几种可能的成因，包括与岩石圈应力有关的火山岩，或WPSP北部较年轻的热点轨迹，记录了约60 Ma的岩浆作用。