Catalogue | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

Catalogue

This search interface gives access to the reference database of VLIZ, an extensive collection of (inter)national marine scientific literature references.

You can limit your search to the Belgian marine literature only or to the VLIZ Library catalogue only by checking the 'VLIZ Library' box.

New search
[ report an error in this record ]basket (0): add | show Print this page

On the relative temperatures of Earth’s volcanic hotspots and mid-ocean ridges
Bao, X.; Lithgow-Bertelloni, C.R.; Jackson, M.G.; Romanowicz, B. (2022). On the relative temperatures of Earth’s volcanic hotspots and mid-ocean ridges. Science (Wash.) 375(6576): 57-61. https://dx.doi.org/10.1126/science.abj8944
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
Peer reviewed article  

Available in  Authors 

Authors  Top 
  • Bao, X.
  • Lithgow-Bertelloni, C.R.
  • Jackson, M.G.
  • Romanowicz, B.

Abstract
    Volcanic hotspots are thought to be fed by hot, active upwellings from the deep mantle, with excess temperatures (Tex) ~100° to 300°C higher than those of mid-ocean ridges. However, Tex estimates are limited in geographical coverage and often inconsistent for individual hotspots. We infer the temperature of oceanic hotspots and ridges simultaneously by converting seismic velocity to temperature. We show that while ~45% of plume-fed hotspots are hot (Tex ≥ 155°C), ~15% are cold (Tex ≤ 36°C) and ~40% are not hot enough to actively upwell (50°C ≤ Tex ≤ 136°C). Hot hotspots have an extremely high helium-3/helium-4 ratio and buoyancy flux, but cold hotspots do not. The latter may originate at upper mantle depths. Alternatively, the deep plumes that feed them may be entrained and cooled by small-scale convection.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors