The distribution of zirconium and hafnium in terrestrial rocks, meteorites and the moon.
Abstract
It is shown that Zr and Hf are not always fractionated in terrestrial igneous differentiation or regional metamorphism. Data do support a Zr-Hf fractionation in the differentiation of the alkali olivine magma at St. Helena Island. A strong Zr-Hf fractionation exists among lunar rocks and minerals. Ilmenite is an excellent concentrator of Zr and Hf and always exhibits high Zr/Hf ratios. Chondritic meteorites exhibit rather uniform Zr abundances and Zr/Hf ratios but a distinct Zr-Hf fractionation is observed among the eucrite and diogenite achondrites.
- Publication:
-
Origin and Distribution of the Elements
- Pub Date:
- 1979
- Bibcode:
- 1979ode..symp..247E
- Keywords:
-
- Hafnium;
- Lunar Rocks;
- Meteoritic Composition;
- Petrology;
- Zirconium;
- Abundance;
- Fractionation;
- Neutron Activation Analysis;
- Radiochemistry;
- Selenology;
- Lunar and Planetary Exploration;
- Meteorites:Element Abundances;
- Moon Rocks:Element Abundances