Chemical fractionation in the solar system |
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| Authors: | J W Morgan |
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| Institution: | (1) Enrico Fermi Institute, University of Chicago, 60637 Chicago, Illinois, USA;(2) Present address: Division of Earth and Physical Sciences, University of Texas at San Antonio, 78285 San Antonio, Texas, USA |
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| Abstract: | The cosmochemical and geochemical history of planetary material is reflected in relative and absolute abundances of two groups
of trace elements; siderophiles and volatiles. Many of these elements can be determined at the requires levels only by radiochemical
neutron activation analysis. The abundance patterns of elements in chondritic meteorites result from condensation processes
in the solar nebula. The composition of planetisimals which bombarded the Moon is characterized from trace elements in lunar
breccias, and is also related to nebula processes. Trace elements in anorthosites and basalts from Earth and Moon suggest
that the Moon is refractory-rich and volatile-poor relative to the Earth. |
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