A PROCEDURE FOR GEOCHEMICAL INTERPRETATION OF TERRESTRIAL RARE-EARTH ABUNDANCE PATTERNS
Journal Article
·
· Journal of Geophysical Research (U.S.)
A procedure for geochemical interpretation of rareearth abundances in rocks and minerals is presented. The ratio of each rare-earth abundance in the sample to the corresponding value in chondritic meteorites (on logartthmic scale) is plotted as a function of atomic number Z. Normalization to chondrites compensates for element-toelement irregularities and reveals small relative abundance variations among neighboring rare earths as a result of natural processes. It is shown that increased order occurs, permitting interpolations and extrapolations to be made with fair confidence, and systematic rare-earth abundance patterns are made apparent. The usefulness of the procedure is discussed using several examples from the existing literature. (auth)
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-008406
- OSTI ID:
- 4747321
- Journal Information:
- Journal of Geophysical Research (U.S.), Journal Name: Journal of Geophysical Research (U.S.) Vol. Vol: 68; ISSN JGREA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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