Are discontinuous chondrite-normalized REE patterns in pegmatitic granite systems the results of monazite fractionation?

Details Are discontinuous chondrite-normalized REE patterns in pegmatitic granite systems the results of monazite fractionation? Are discontinuous chondrite-normalized REE patterns in pegmatitic granite systems the results of monazite fractionation?

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.2141y&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 54, Issue 7, pp.2141-2145

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Scientific paper

All 14 stable rare earth elements (REEs) in biotite-muscovite granite and tourmaline-rich granite of the Harney Peak Granite, Black Hills, South Dakota, USA, have been analyzed using inductively coupled plasma mass spectrometry. Chrondrite-normalized REE patterns of the tourmaline-rich granites are discontinuous between Nd and Sm. The discontinuity was modeled successfully by the fractional crystallization of monazite from a biotite-muscovite granite initial composition. This explanation may also apply to the development of such discontinuous patterns in other highly evolved rocks.

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