Melt mapped inside Earth’s mantle

Nature ◽  
2020 ◽  
Vol 586 (7830) ◽  
pp. 506-507
Author(s):  
Laura Cobden
Keyword(s):  
Earth’S Mantle

Phase changes and convection in the Earth’s mantle

1965 ◽  
Vol 258 (1088) ◽  
pp. 276-283 ◽  
Keyword(s):  
Temperature Gradient ◽  
Phase Change ◽  
Initial Temperature ◽  
Phase Changes ◽  
Homogeneous Layer ◽  
Transformation Zone ◽  
Earth’S Mantle ◽  
Transition Level ◽  
Transformation Rates

A phase change may hinder or enhance convection, depending on its characteristics. Univariant transformations such as may occur in the mantle constitute a barrier to convection unless the motion starts at some distance above or below the transition level; an initial temperature gradient in excess of the adiabatic value is also required. Multivariant transformations only require, in the transformation zone, an initial gradient slightly greater than the adiabatic value for a homogeneous layer. The effect on convection of transformation rates is not likely to be serious.

The Earth's mantle

1968 ◽  
Vol 1 (3) ◽  
pp. 198-199
Author(s):  
D.W. Collinson
Keyword(s):  
Earth’S Mantle

scholarly journals Metamorphic devolatilization of subducted marine sediments and the transport of volatiles into the Earth's mantle

Nature ◽  
2001 ◽  
Vol 411 (6835) ◽  
pp. 293-296 ◽  
Author(s):  
D. M. Kerrick ◽  
J. A. D. Connolly
Keyword(s):  
Marine Sediments ◽  
Earth’S Mantle

scholarly journals Water partitioning in the Earth's mantle

2010 ◽  
Vol 183 (1-2) ◽  
pp. 245-251 ◽  
Author(s):  
Toru Inoue ◽  
Tomoyuki Wada ◽  
Rumi Sasaki ◽  
Hisayoshi Yurimoto
Keyword(s):  
Earth’S Mantle ◽  
Water Partitioning

Thermal expansion of silicate perovskite and stratification of the Earth's mantle

Nature ◽  
1986 ◽  
Vol 319 (6050) ◽  
pp. 214-216 ◽  
Author(s):  
Elise Knittle ◽  
Raymond Jeanloz ◽  
Gordon L. Smith
Keyword(s):  
Thermal Expansion ◽  
Earth’S Mantle

Stochastic Late Accretion to Earth, the Moon, and Mars

Science ◽  
2010 ◽  
Vol 330 (6010) ◽  
pp. 1527-1530 ◽  
Author(s):  
William F. Bottke ◽  
Richard J. Walker ◽  
James M. D. Day ◽  
David Nesvorny ◽  
Linda Elkins-Tanton
Keyword(s):  
Size Distribution ◽  
Asteroid Belt ◽  
The Moon ◽  
Core Formation ◽  
Highly Siderophile Elements ◽  
Earth’S Mantle ◽  
Distribution Matching ◽  
Siderophile Elements ◽  
Impact Basins

Core formation should have stripped the terrestrial, lunar, and martian mantles of highly siderophile elements (HSEs). Instead, each world has disparate, yet elevated HSE abundances. Late accretion may offer a solution, provided that ≥0.5% Earth masses of broadly chondritic planetesimals reach Earth’s mantle and that ~10 and ~1200 times less mass goes to Mars and the Moon, respectively. We show that leftover planetesimal populations dominated by massive projectiles can explain these additions, with our inferred size distribution matching those derived from the inner asteroid belt, ancient martian impact basins, and planetary accretion models. The largest late terrestrial impactors, at 2500 to 3000 kilometers in diameter, potentially modified Earth’s obliquity by ~10°, whereas those for the Moon, at ~250 to 300 kilometers, may have delivered water to its mantle.

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