A Complex Mantle Plume Head Below East Africa‐Arabia Shaped by the Lithosphere‐Asthenosphere Boundary Topography
A Complex Mantle Plume Head Below East Africa‐Arabia Shaped by the Lithosphere‐Asthenosphere Boundary Topography
复制标题
东非-阿拉伯地区岩石圈-软流圈边界地形塑造的复杂地幔柱头
DOI:
10.1029/2022gc010610
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
N. Celli
中科院分区:
文献类型:
--
作者:
C. Civiero;S. Lebedev;N. Celli
Hot plumes rising from Earth's deep mantle are thought to cause uplift, rifting and large igneous province (LIP) emplacement. LIP volcanism in continents often spans tens of Ma and scatters unevenly over broad areas. This has been attributed to lateral flow of hot plume material, but observational evidence on such flow is scarce. New waveform tomography with massive data sets reveals detailed seismic velocity structure beneath the East Africa‐Arabia region, where these processes occur at present. It shows interconnected sub‐lithospheric corridors of hot, partially molten rock, fed by three mantle upwellings beneath Kenya, Afar, and Levant. The spatio‐temporal distribution of the volcanism suggests that we are witnessing an integral plume head, which morphed into a three‐pointed star by ponding and channeling within thin‐lithosphere corridors. Plate reconstructions indicate that it spread south‐to‐north since ∼45 Ma. These results suggest that complex‐shape plume heads can explain the enigmatic, scattered LIP volcanism and are, probably, an inherent feature of plume‐continent interaction.
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通讯作者:
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DOI:
10.1029/2020jb019929
发表时间:
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期刊:
Journal of Geophysical Research: Solid Earth
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10.1002/2014gc005648
发表时间:
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期刊:
Geochemistry, Geophysics, Geosystems
影响因子:
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作者:
Thompson D
通讯作者:
Thompson D
影响因子:
2.8
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C. Legendre;T. Meier;S. Lebedev;W. Friederich;L. Viereck-Götte
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