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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
Published for geochemistry community from Geochemical Society of Japan.

A preliminary study on D/H ratios of hornblendes from granites and ultramafic-mafic rocks

Yoshimasu Kuroda, Tetsuro Suzuoki, Sadao Matsuo
Geochemical Journal, Vol. 8, No. 3, P. 135-139, 1974


The δD values of hornblendes from some granites and ultramafic-mafic rocks suggest that the water in granitic magma and the water equilibrated with hornblendes in ultramafic-mafic rocks associated with peridotites seem to be the same with respect to δD values which range from -29 to -37‰. Water contents of hornblendes in ultramafic-mafic rocks are clearly higher than those in granitic rocks. The δD values and water contents of hornblendes from nodules in some alkali basalts and possibly metamorphosed ultramafic-mafic rocks are quite different from those of the rocks mentioned above.

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