Zr-Hf fractionation in chemically defined lunar rock groups

Details Zr-Hf fractionation in chemically defined lunar rock groups Zr-Hf fractionation in chemically defined lunar rock groups

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.3397g&link_type=abstract

In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 3. (A77-34651 15-91) New York, Pergamon

Physics

Chemical Fractionation, Hafnium, Lunar Rocks, Petrology, Zirconium, Abundance, Anorthosite, Basalt, Lunar Maria, Selenology

Scientific paper

Zirconium and hafnium, a geochemically coherent pair of elements, are strongly fractionated in lunar rocks, as evidenced by a wide range of Zr/Hf mass ratios from 12 for the anorthosite 60015,65A to 50 for the KREEP breccia 14321. This may be explained in part by selective reduction of Zr(4+) to Zr(3+) and exclusion of the Zr(3+) from early crystallized Fe-Ti minerals.

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