海洋地质与第四纪地质2024，Vol.44Issue(4)：65-77,13.DOI:10.16562/j.cnki.0256-1492.2023021701
九州-帕劳海脊南段及邻近海域典型海山形态特征及地质意义
Morphological characteristics and geological significance of seamounts in the southern Kyushu-Palau Ridge areas
摘要
Abstract
The quantitative morphology study of volcanic seamount helps to understand the seamount evolution and intrinsic relationship between seamount morphology and geodynamics.High-resolution seabed topography data of 40 volcanic seamounts in the southern Kyushu-Palau Ridge and adjacent areas were used to analyze statistically the seamount morphology and the influence on sedimentation dynamics of bottom flow by spectral and sequence stratigraphy analyses.Results show that the average height of seamounts in the study area is 1374 m,the average volume is 100 km3,the aspect ratio is 0.21±0.09,and the flatness is 0.16±0.18.The height of seamounts in the northern Central Basin Rift and the southern Kyushu-Palau Ridge show a good linear correlation with the bottom radius,while the correlation between seamounts in the southern Central Basin Rift is poor.The aspect ratio of seamounts in the southern Central Basin Rift is significantly greater than that in the northern Central Basin rift due probably to complicated stress fields under regional tectonic frames.By summarizing four volcanic evolution models,we found that the seamounts in the study area fit the model that they grow with proportional increase in summit height and base diameter,which could be explained by intermittent volcanic eruptions leading to proportional development on the top and flanks.关键词
成因演化/沉积动力/海山/九州-帕劳海脊Key words
genetic evolution/sedimentary dynamics/seamount/Kyushu-Palau Ridge分类
海洋科学引用本文复制引用
刘佳,李攀峰,邢磊,胡邦琦,杨慧良,赵京涛..九州-帕劳海脊南段及邻近海域典型海山形态特征及地质意义[J].海洋地质与第四纪地质,2024,44(4):65-77,13.基金项目
国家自然科学基金面上项目"菲律宾海盆底层水体性质对中更新世气候转型的响应机制"(41976192) （41976192）
中国地质调查局项目(DD20191010,DD20191003,DD20230647) （DD20191010,DD20191003,DD20230647）
自然资源部海底科学重点实验室开放基金"多波束后向散射强度对九州-帕劳海脊多金属结核分布的响应"(KLSG2103) （KLSG2103）
