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Limitations on the composition of the upper mantle
Abstract
New determinations of the isotopic composition of strontium and of the concentration of K, Rb, Cs, Sr, and Ba rocks and meteorites are given. The isotopic abundance of Sr87 in the upper mantle and the crust appears to be lower than that found for chondrites. Furthermore, for a chondritic earth model, the concentrations of potassium, rubidium, and cesium in the earth's crust are anomalous when compared with those of uranium, barium, and strontium. These two concurring arguments indicate that the upper mantle and crust of the earth do not contain K, Rb, Cs, U, Ba, and Sr, in the proportions found in chondrites, and that the alkali metals are depleted relative to U, Sr, and Ba. This depletion may be an indication of a nonchondritic earth composition; it may also result from an earth differentiation in which K, Rb, and Cs were concentrated or retained in the lower mantle.
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Citations
Cites
Age of meteorites and the Earth
Patterson, C. (1956) · Geochimica et Cosmochimica Acta · doi:10.1016/0016-7037(56)90036-9 · Cited by 559
Calculations on the thermal history of the Earth
MacDonald, G. J. F. (1959) · Journal of Geophysical Research · doi:10.1029/jz064i011p01967 · Cited by 268
Cited by
McDonough, W. F., & Sun, S.-S. (1995) · Chemical Geology · doi:10.1016/0009-2541(94)00140-4 · Cited by 14,004
Abundance of chemical elements in the continental crust: a new table
Taylor, S. R. (1964) · Geochimica et Cosmochimica Acta · doi:10.1016/0016-7037(64)90129-2 · Cited by 3,103
Sampling Mantle Heterogeneity through Oceanic Basalts: Isotopes and Trace Elements
Hofmann, A. W. (2007) · Treatise on Geochemistry · doi:10.1016/b0-08-043751-6/02123-x · Cited by 758
Origin, age, and composition of meteorites
Anders, E. (1964) · Space Science Reviews · doi:10.1007/bf00177954 · Cited by 718
Chemical fractionations in meteorites—II. Abundance patterns and their interpretation
Larimer, J. W., & Anders, E. (1967) · Geochimica et Cosmochimica Acta · doi:10.1016/s0016-7037(67)80014-0 · Cited by 536
Metadata
- Authors
- Gast, P. W.
- Venue
- Journal of Geophysical Research
- Publisher
- American Geophysical Union (AGU)
- Published
- 1960-04
- Volume
- 65
- Issue
- 4
- Pages
- 1287-1297
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2164242582
- Cited by
- 270
- References
- 2
- FWCI
- 19.54
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
