Title
Ice-VII inclusions in Diamonds: Evidence for Aqueous Fluid in Earth’s Deep Mantle
Document Type
Article
Publication Date
3-9-2018
Publication Title
Science
Volume
359
Issue
6380
First page number:
1136
Last page number:
1139
Abstract
Water-rich regions in Earth’s deeper mantle are suspected to play a key role in the global water budget and the mobility of heat-generating elements. We show that ice-VII occurs as inclusions in natural diamond and serves as an indicator for such water-rich regions. Ice-VII, the residue of aqueous fluid present during growth of diamond, crystallizes upon ascent of the host diamonds but remains at pressures as high as 24 gigapascals; it is now recognized as a mineral by the International Mineralogical Association. In particular, ice-VII in diamonds points toward fluid-rich locations in the upper transition zone and around the 660-kilometer boundary.
Disciplines
Geology
Language
english
Repository Citation
Tschauner, O.,
Huang, S.,
Greenberg, E.,
Prakapenka, V. B.,
Ma, C.,
Rossman, G. R.,
Shen, A. H.,
Zhang, D.,
Newville, M.,
Lanzirotti, A.,
Tait, K.
(2018).
Ice-VII inclusions in Diamonds: Evidence for Aqueous Fluid in Earth’s Deep Mantle.
Science, 359(6380),
1136-1139.
http://dx.doi.org/10.1126/science.aao3030