Heavy element affinities in Apollo 17 samples |
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| Authors: | RO Allen S Jovanovic GW Reed |
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| Institution: | Chemistry Division, Argonne National Laboratory, Argonne, Ill. USA |
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| Abstract: | 204Pb, Bi, Tl and Zn in samples from Apollo 17 exhibit relationships not found in samples from other sites.204Pb, Tl and Zn in residues remaining after dilute acid leaching are correlated with one another. Orange soil 74220, which is enriched in204Pb, Tl and Zn, is included in these relationships. In addition the submicron metallic phase generally associated with agglutinate formation is correlated with all three of these elements; this relationship has already been reported for204Pb in other samples. Thus, orange soil and agglutinates appear to be involved in concentrating heavy volatile metals. A process other than mixing is required to account for this. As a consequence of the isolation of the landing site by the surrounding massifs, local supply and recycling of volatile trace elements in soils may account for some of the interelement relations. |
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