Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5010
AuthorsGaillard, F.* 
Malki, M.* 
Iacono Marziano, G.* 
Pichavant, M.* 
Scaillet, B.* 
TitleCarbonatite Melts and Electrical Conductivity in the Asthenosphere
Issue DateNov-2008
Series/Report no./322 (2008)
DOI10.1126/science.1164446
URIhttp://hdl.handle.net/2122/5010
Keywordselectrical conductivity
mantle
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes 
AbstractElectrically conductive regions in the Earth mantle have been interpreted to reflect the presence of either silicate melt or water dissolved in olivine. On the basis of laboratory measurements we show that molten carbonates have electrical conductivities that are 3 orders of magnitude higher than those of molten silicate and 5 orders of magnitude higher than those of hydrated olivine. High conductivities in the asthenosphere probably indicate the presence of small amounts of carbonate melt in peridotite and can therefore be interpreted in terms of carbon concentration in the upper mantle. We show that the conductivity of the Oceanic asthenosphere can be explained by 0.1 volume % of carbonatite melts on average, which agrees with the CO2 content of Mid Ocean Ridge Basalts.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Gaillard et al Science in press.pdfMain article1.58 MBAdobe PDFView/Open
Show full item record

Page view(s)

62
checked on Apr 23, 2017

Download(s)

100
checked on Apr 23, 2017

Google ScholarTM

Check

Altmetric