Tracking the origin of ultralow velocity zones at the base of Earth's mantle
Keyword(s):
ABSTRACT Origins of the ultralow velocity zones may be classified by their velocity-reduction-ratio, R = δlnVS/δlnVP, which ranges from 1.2–1.5 for iron oxides or iron-enriched magnesium oxides, 1.6–2.0 for pyrite-type FeO2Hx, 2.3–2.8 for the eutectic melt of Fe + C, 2.7–3.1 for partial melt of (Mg, Fe)SiO3 + Fe to 3.5–4.5 for iron-rich post-perovskite.
Keyword(s):
Keyword(s):
2009 ◽
Vol 8
(4)
◽
pp. 895-900
◽
Keyword(s):