The distribution of zirconium and hafnium in terrestrial rocks, meteorites and the moonIt 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.
Document ID
19790060753
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Ehmann, W. D. (Kentucky Univ. Lexington, KY, United States)
Chyi, L. L. (Kentucky Univ. Lexington, KY, United States)
Garg, A. N. (Kentucky Univ. Lexington, KY, United States)
Ali, M. Z. (Kentucky, University Lexington, Ky., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Origin and distribution of the elements. Volume 34 - Second Symposium