Zr/hf fractionation in intraplate basaltic rocks: Carbonate metasomatism in the mantle source

Details Zr/hf fractionation in intraplate basaltic rocks: Carbonate metasomatism in the mantle source Zr/hf fractionation in intraplate basaltic rocks: Carbonate metasomatism in the mantle source

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.2417d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 56, Issue 6, pp.2417-2423

Physics

24

Scientific paper

In continental and oceanic intraplate basaltic rocks, the Zr / Hf ratio is frequently higher than the chondritic value and varies over a large range of 38-87. The ratio increases with the La / Sm ratio and, in each volcanic locality, is positively correlated with the degree of silica undersaturation of the basaltic rocks. The variation of the Zr / Hf ratios probably reflects a heterogeneous mantle source variably metasomatized by carbonate-rich fluids.

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