Elements; August 2008; v. 4; no. 4;
p. 247-252; DOI: 10.2113/GSELEMENTS.4.4.247
© Mineralogical Society of America
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FIGURE 5 Ir- and chondrite-normalized PGE composition of the primitive mantle
(Becker et al. 2006) compared
with the main groups of chondritic meteorites (A) and with impact rocks
of lunar maria (B). Note that the primitive mantle estimate does not
correspond to any known chondrite composition; only the strongly brecciated
rocks in the heights around lunar maria, and contemporaneous with the 3.9-3.8
Ga late heavy bombardment recorded by the Moon's surface, provide a reasonably
good match with the Becker et al.
(2006) primitive mantle
estimate.
Copyright © 2009 by Mineralogical Society of America
