Acta Scientiarum Naturalium Universitatis Pekinensis

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Temporal Variation in Volume Flux of Hawaii Plume through 35 Ma

HAN Shuoshuo, CHEN Yongshun   

  1. The Institute of Theoretical and Applied Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871;
  • Received:2008-06-26 Online:2009-05-20 Published:2009-05-20

Hawaii地幔柱近35 Ma的体积流量变化


  1. 北京大学地球与空间科学学院理论与应用地球物理研究所,北京100871;

Abstract: A flexure model is formulated to estimate mantle plume volume flux through hotspot swell topography. By using the model curve to best fit the actual seafloor topography on 27 cross-sections of Hawaiian swell, the temporal variation in volume flux of Hawaiian plume during the past 35 Ma is estimated, and two volume flux peaks at 3-4 Ma and 17-19 Ma before present are observed.

Key words: hotspot, mantle plume, hotspot swell, plume volume flux

摘要: 建立了由海底热点隆起横截面地形估算地幔柱体积流量的简单模型,并在去除了海洋岩石圈冷却下沉、海山以及沉积层影响的情况下,运用该模型对Hawaii热点隆起的27个区域的横截面地形曲线进行了拟合分析,估算了Hawaii地幔柱体积流量在过去35Ma中的变化,并观测到距今3~4Ma和距今17~19Ma的两个峰值。

关键词: 热点, 地幔柱, 热点隆起, 地幔柱体积流量

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