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Composition of the depleted mantle
Abstract
We present an estimate for the composition of the depleted mantle (DM), the source for mid‐ocean ridge basalts (MORBs). A combination of approaches is required to estimate the major and trace element abundances in DM. Absolute concentrations of few elements can be estimated directly, and the bulk of the estimates is derived using elemental ratios. The isotopic composition of MORB allows calculation of parent‐daughter ratios. These estimates form the “backbone” of the abundances of the trace elements that make up the Coryell‐Masuda diagram (spider diagram). The remaining elements of the Coryell‐Masuda diagram are estimated through the composition of MORB. A third group of estimates is derived from the elemental and isotopic composition of peridotites. The major element composition is obtained by subtraction of a low‐degree melt from a bulk silicate Earth (BSE) composition. The continental crust (CC) is thought to be complementary to the DM, and ratios that are chondritic in the CC are expected to also be chondritic in the DM. Thus some of the remaining elements are estimated using the composition of CC and chondrites. Volatile element and noble gas concentrations are estimated using constraints from the composition of MORBs and ocean island basalts (OIBs). Mass balance with BSE, CC, and DM indicates that CC and this estimate of the DM are not complementary reservoirs.
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Citations
Cites
Mantle geochemistry: The message from oceanic volcanism
Hofmann, A. W. (1997) · Nature · doi:10.1038/385219a0 · Cited by 2,782
Recycled dehydrated lithosphere observed in plume-influenced mid-ocean-ridge basalt
Dixon, J. E., Leist, L., Langmuir, C., & Schilling, J.-G. (2002) · Nature · doi:10.1038/nature01215 · Cited by 523
Cited by
The origins and concentrations of water, carbon, nitrogen and noble gases on Earth
Marty, B. (2012) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2011.10.040 · Cited by 1,012
The continental record and the generation of continental crust
Cawood, P. A., Hawkesworth, C. J., & Dhuime, B. (2013) · Geological Society of America Bulletin · doi:10.1130/b30722.1 · Cited by 722
Analysis of 60 elements in 616 ocean floor basaltic glasses
Jenner, F. E., & O'Neill, H. S. C. (2012) · Geochemistry, Geophysics, Geosystems · doi:10.1029/2011gc004009 · Cited by 522
Why Archaean TTG cannot be generated by MORB melting in subduction zones
Martin, H., Moyen, J.-F., Guitreau, M., Blichert-Toft, J., & Le Pennec, J.-L. (2014) · Lithos · doi:10.1016/j.lithos.2014.02.017 · Cited by 346
Carbonatites: Classification, Sources, Evolution, and Emplacement
Yaxley, G. M., Anenburg, M., Tappe, S., Decree, S., & Guzmics, T. (2022) · Annual Review of Earth and Planetary Sciences · doi:10.1146/annurev-earth-032320-104243 · Cited by 280
Metadata
- Authors
- Salters, V. J. M., & Stracke, A.
- Venue
- Geochemistry, Geophysics, Geosystems
- Publisher
- American Geophysical Union (AGU)
- Published
- 2004-05
- Volume
- 5
- Issue
- 5
- ISSN
- 1525-2027 (ISSN-L)
- OpenAlex
- W1534749586
- Cited by
- 1,955
- References
- 2
- FWCI
- 28.41
- Type
- journal article
- Language
- en
- Open access
- closed
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