Chemical composition of Earth, Venus, and Mercury.

Abstract:

:Model compositions of Earth, Venus, and Mercury are calculated from the premise that planets and chondrites underwent four identical fractionation processes in the solar nebula. Because elements of similar properties stay together in these processes, five constraints suffice to define the composition of a planet: mass of the core, abundance of U, and the ratios K/U, Tl/U, and FeO/(FeO + MgO). Complete abundance tables, and normative mineralogies, are given for all three planets. Review of available data shows only a few gross trends for the inner planets: FeO decreases with heliocentric distance, whereas volatiles are depleted and refractories are enriched in the smaller planets.

authors

Morgan JW,Anders E

doi

10.1073/pnas.77.12.6973

subject

Has Abstract

pub_date

1980-12-01 00:00:00

pages

6973-7

issue

12

eissn

0027-8424

issn

1091-6490

journal_volume

77

pub_type

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