Physics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7.1077p&link_type=abstract
Geophysical Research Letters, vol. 7, Dec. 1980, p. 1077-1080.
Physics
50
Basalt, Earth Mantle, Geochemistry, Hafnium Isotopes, Ocean Bottom, Atlantic Ocean, Fractionation, Lutetium
Scientific paper
Hafnium isotope ratios generated by the beta(-) decay of Lu-176 are investigated in volcanic rocks derived from the suboceanic mantle. Hf-176/Hf-177 and Lu/Hf ratios were determined to precisions of 0.01-0.04% and 0.5%, respectively, by routine, low-blank chemistry. The Hf-176/Hf-177 ratio is found to be positively correlated with the Nd-143/Nd-144 ratio and negatively correlated with the Sr-87/Sr-86 and Pb-206/Pb-204 ratios, and to increase southwards along the Iceland-Reykjanes ridge traverse. An approximate bulk earth Hf-176/Hf-177 ratio of 0.28295 is inferred from the bulk earth Nd-143/Nd-144 ratio, which requires a bulk earth Lu/Hf ratio of 0.25, similar to the Juvinas eucrite. Midocean ridge basalts are shown to account for 60% of the range of Hf isotope ratios, and it is suggested that Lu-Hf fractionation is decoupled from Sm-Nd and Rb-Sr fractionation in very trace-element-depleted source regions as a result of partial melting.
Jonathan Patchett P.
Tatsumoto Mitsonobu
No associations
LandOfFree
Hafnium isotope variations in oceanic basalts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hafnium isotope variations in oceanic basalts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hafnium isotope variations in oceanic basalts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-754715