Disequilibrium melting and melt migration driven by impacts: Implications for rapid planetesimal core formation

2013 ◽  
Vol 100 ◽  
pp. 41-59 ◽  
Author(s):  
Andrew G. Tomkins ◽  
Roberto F. Weinberg ◽  
Bruce F. Schaefer ◽  
Andrew Langendam
Keyword(s):  
Core Formation ◽  
Melt Migration ◽  
Disequilibrium Melting

Roles of the key enzymes involved in the angucycline core formation in the BE-7585A biosynthesis

Planta Medica ◽  
2014 ◽  
Vol 80 (10) ◽  
Author(s):  
X Yu ◽  
M Metsä-Ketelä ◽  
SC Tsai ◽  
HW Liu ◽  
J Rohr
Keyword(s):  
Core Formation ◽  
Key Enzymes

Core formation by giant impacts

Icarus ◽  
1992 ◽  
Vol 100 (2) ◽  
pp. 326-346 ◽  
Author(s):  
W. Brian Tonks ◽  
H. Jay Melosh
Keyword(s):  
Core Formation ◽  
Giant Impacts

scholarly journals Melt migration and chemical differentiation by reactive porosity waves

2021 ◽  
Author(s):  
Annelore Bessat ◽  
Sebastien Pilet ◽  
Yuri Yurivech Podladchikov ◽  
Stefan Markus Schmalholz
Keyword(s):  
Melt Migration ◽  
Chemical Differentiation

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.

Core formation in asteroids

1992 ◽  
Vol 97 (E9) ◽  
pp. 14717 ◽  
Author(s):  
G. Jeffrey Taylor
Keyword(s):  
Core Formation
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