Davies, David Rhodri  ORCID: https://orcid.org/0000-0002-7662-9468 and Davies, John Huw ORCID: https://orcid.org/0000-0003-2656-0260
2009.
Thermally-driven mantle plumes reconcile multiple hot-spot observations.
Earth and Planetary Science Letters
278
(1-2)
, pp. 50-54.
10.1016/j.epsl.2008.11.027
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Abstract
Hot-spots are anomalous regions of magmatism that cannot be directly associated with plate tectonic processes. They are widely-regarded as the surface expression of upwelling mantle plumes. Hot-spots exhibit variable life-spans, magmatic productivity and fixity. This suggests that a wide-range of upwelling structures coexist within Earth's mantle, a view supported by geochemical and seismic evidence, but, thus far, not fully-reproduced by numerical models. Here, results from a new, global, 3-D spherical, mantle convection model are presented, which better reconcile hot-spot observations, the key modification from previous models being increased convective vigor. Model upwellings show broad-ranging dynamics; some drift slowly, while others are more mobile, displaying variable life-spans, intensities and migration velocities. Such behavior is consistent with hot-spot observations, indicating that the mantle must be simulated at the correct vigor and in the appropriate geometry to reproduce Earth-like dynamics. Thermally-driven mantle plumes can explain the principal features of hot-spot volcanism on Earth.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Professional Services > Advanced Research Computing @ Cardiff (ARCCA) Schools > Earth and Environmental Sciences |
| Subjects: | Q Science > QE Geology |
| Uncontrolled Keywords: | Hot-spots; Mantle plumes; Plate tectonics; Paleomagnetism; Multigrid-refinement; Multi-resolution |
| Publisher: | Elsevier |
| ISSN: | 0012-821X |
| Last Modified: | 07 May 2023 21:41 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/9399 |
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