Seismic Tomogram of the Earth's Mantle: Geodynamic Implications
Seismic Tomogram of the Earth's Mantle: Geodynamic Implications
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地幔地震层析成像：地球动力学意义
DOI：
10.1126/science.258.5082.625
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发表时间：
1992
期刊：
影响因子：
56.9
通讯作者：
Y. Fukao
中科院分区：
文献类型：
--
作者：
Y. Fukao
最近对地球地幔的地震层析成像显示了一种大规模的地幔对流模式，包括太平洋和非洲的上涌柱状地幔柱和沿着环太平洋的下涌平面岩席。上升流和下降流分别在南太平洋和西太平洋最广泛。从日本周围密集的地震台网获得了板块俯冲的高分辨率图像。日本的地震学家最有能力解决作为整个对流系统的一个组成部分的下降流的内部结构。
Recent seismic tomography of the Earth's mantle has revealed a large-scale pattern of mantle convection comprising upwelling columnar plumes in the Pacific and Africa and downwelling planar sheets along the Circum Pacific. Upwelling and downwelling occur most extensively under the south Pacific and west Pacific, respectively. High-resolution image of plate subduction has been obtained from the dense seismic networks around Japan. Japanese seismologists are in the best position to resolve the internal structure of downwelling current as an integral part of the whole convection system.