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Mesosiderites and howardites - Igneous formation and possible genetic relationships (1979)

Chou, C.-L. ; Mittlefehldt, D. W. ; Wasson, J. T.

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Publication Date: 2019-06-27

Description: Neutron activation data are presented for major, minor, and trace elements in whole rock howardites and silicates from mesosiderites. Compositions of howardites and mesosiderites are similar and intermediate between those of eucrites and diogenites. It is indicated that mesosiderites have a higher normative silica component than howardites. It appears that this results partly from a higher content of a highly evolved igneous component and partly from in situ reduction of FeO to Fe followed by magnetic separation of metal prior to analysis. It is shown that light rare earth elements are enriched in some mesosiderites.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: Geochimica et Cosmochimica Acta; 43; May 1979

Format: text

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