Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Thermally-driven mantle plumes reconcile multiple hot-spot observations

Davies, David Rhodri and Davies, John Huw 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

[img]
Preview
PDF
Download (3MB) | Preview

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: Advanced Research Computing @ Cardiff (ARCCA)
Earth and Ocean 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: 04 Jun 2017 02:07
URI: http://orca.cf.ac.uk/id/eprint/9399

Citation Data

Cited 36 times in Google Scholar. View in Google Scholar

Cited 56 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics