The Emperor Seamounts: Southward Motion of the Hawaiian Hotspot Plume in Earth's Mantle
The Emperor Seamounts: Southward Motion of the Hawaiian Hotspot Plume in Earth's Mantle
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DOI：
10.1126/science.1086442
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发表时间：
2003-08
期刊：
影响因子：
56.9
通讯作者：
J. Tarduno;R. Duncan;D. Scholl;R. Cottrell;B. Steinberger;T. Thordarson;B. Kerr;C. Neal;F. Frey-F.
中科院分区：
文献类型：
--
作者：
J. Tarduno;R. Duncan;D. Scholl;R. Cottrell;B. Steinberger;T. Thordarson;B. Kerr;C. Neal;F. Frey-F.
夏威夷-皇帝热点轨迹有一个明显的弯曲，这是夏威夷热点固定在地幔深处的理论的基础，追踪了板块运动的变化。然而，从海洋钻探回收的样品中获得的古地磁和放射性年龄数据定义了一个年龄递进的古纬度历史，表明皇帝海山趋势主要是由夏威夷热点羽流在晚白垩纪至早第三纪（8100万至4700万年前）的快速运动（每年超过40毫米）形成的。夏威夷地幔柱运动的证据影响了地幔对流和板块构造的模型，改变了我们对地球动力学的理解。
The Hawaiian-Emperor hotspot track has a prominent bend, which has served as the basis for the theory that the Hawaiian hotspot, fixed in the deep mantle, traced a change in plate motion. However, paleomagnetic and radiometric age data from samples recovered by ocean drilling define an age-progressive paleolatitude history, indicating that the Emperor Seamount trend was principally formed by the rapid motion (over 40 millimeters per year) of the Hawaiian hotspot plume during Late Cretaceous to early-Tertiary times (81 to 47 million years ago). Evidence for motion of the Hawaiian plume affects models of mantle convection and plate tectonics, changing our understanding of terrestrial dynamics.