We used recently collected bathymetric data and published gravity data to examine the effective elastic thickness of the lithosphere and the crustal thickness beneath the Ojin Rise Seamounts, located east of Shatsky Rise in the northwest Pacific Ocean. An admittance analysis of the bathymetric and gravity data indicates that the effective elastic thickness of the Pacific plate under the Ojin Rise Seamounts is 2.7 ± 0.1 km, implying that the seamounts were formed on or near the spreading ridge between the Pacific and Farallon plates. The mean crustal thickness beneath the seamounts estimated from the mantle Bouguer anomaly is 10.1 ± 1.7 km, which is thicker than the surrounding crust. The thick crust was probably formed by the interaction between the Pacific–Farallon ridge and a hotspot forming Shatsky Rise. Our results indicate that late-stage volcanism after the formation of the main edifices of Shatsky Rise spread widely beyond the eastern side of the rise, forming the Ojin Rise Seamounts.

中文翻译：

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受热点影响的近脊轴火山作用：来自西北太平洋沙茨基隆起以东的奥金隆起海山的有效弹性厚度和地形的见解

我们使用最近收集的测深数据和已发表的重力数据来检查岩石圈的有效弹性厚度和位于西北太平洋沙茨基隆起以东的奥金隆起海山下方的地壳厚度。测深和重力数据的导纳分析表明，Ojin Rise海山下太平洋板块的有效弹性厚度为2.7±0.1 km，这意味着海山形成在太平洋和Farallon板块之间的扩张脊上或附近。根据地幔布格异常估计海山下方的平均地壳厚度为10.1±1.7公里，比周围地壳厚。厚厚的地壳可能是由太平洋-法拉隆海脊与形成沙茨基隆起的热点相互作用形成的。