The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
Continental geochemical signatures in dacites from Iceland and implications for models of early Archaean crust formation
Open accessAbstract
Whether early Archaean felsic crust was formed by processes related to plate subduction or melting of thick basaltic plateaus is vividly debated. Ultimately, the discussion hinges on the question of how Archaean felsic crust has obtained its distinct chemical traits. Here we report chemical and isotopic data for a suite of Cenozoic felsic volcanic rocks from Iceland. The samples exhibit the key-chemical characteristics of early Archaean felsic continental crust such as calc-alkaline composition, strong enrichment in Na relative to K, high Pb/Ce, La/Nb, and Ta/Nb ratios. Involvement of pre-existing continental lithosphere in the petrogenesis of the samples can be excluded, because their Pb-207/Pb-204 and Pb-206/Pb-204 ratios plot well within the range of Iceland basalts. Model calculations suggest that the chemical characteristics were produced by high-pressure partial melting of basaltic lower crust followed by fractional crystallisation of amphibole, plagioclase, and ilmenite. These findings demonstrate that plate subduction and melting of subduction-modified mantle or lithosphere are not necessarily required to produce the key-chemical signatures of continental crust. Hence, the calc-alkaline dacites provide intriguing support for early Archaean continental crust formation by melting of thick mafic plateaus. (C) 2008 Elsevier B.V. All rights reserved.
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Cites
Bédard, J. H. (2006) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2005.11.008 · Cited by 887
Growth of early continental crust by partial melting of eclogite
Rapp, R. P., Shimizu, N., & Norman, M. D. (2003) · Nature · doi:10.1038/nature02031 · Cited by 774
Jahn, B.-M., Glikson, A. Y., Peucat, J. J., & Hickman, A. H. (1981) · Geochimica et Cosmochimica Acta · doi:10.1016/s0016-7037(81)80002-6 · Cited by 402
The mechanisms of petrogenesis of the Archaean continental crust—comparison with modern processes
Martin, H. (1993) · Lithos · doi:10.1016/0024-4937(93)90046-f · Cited by 247
Cited by
Moyen, J.-F., & Martin, H. (2012) · Lithos · doi:10.1016/j.lithos.2012.06.010 · Cited by 1,015
Laurent, O., Martin, H., Moyen, J. F., & Doucelance, R. (2014) · Lithos · doi:10.1016/j.lithos.2014.06.012 · Cited by 938
Moyen, J.-F. (2011) · Lithos · doi:10.1016/j.lithos.2010.09.015 · Cited by 708
Plate tectonics on the Earth triggered by plume-induced subduction initiation
Gerya, T. V., Stern, R. J., Baes, M., Sobolev, S. V., & Whattam, S. A. (2015) · Nature · doi:10.1038/nature15752 · Cited by 481
Subduction styles in the Precambrian: Insight from numerical experiments
Sizova, E., Gerya, T., Brown, M., & Perchuk, L. L. (2010) · Lithos · doi:10.1016/j.lithos.2009.05.028 · Cited by 441
Metadata
- Authors
- Willbold, M., Hegner, E., Stracke, A., & Rocholl, A.
- Venue
- Earth and Planetary Science Letters
- Publisher
- Elsevier BV
- Published
- 2009-03
- Volume
- 279
- Issue
- 1-2
- Pages
- 44-52
- ISSN
- 0012-821X (ISSN-L)
- OpenAlex
- W2059111517
- Cited by
- 160
- References
- 4
- FWCI
- 9.99
- Type
- journal article
- Language
- en
- Open access
- green
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- Willbold, M., Hegner, E., Stracke, A., & Rocholl, A. (2009). Continental geochemical signatures in dacites from Iceland and implications for models of early Archaean crust formation. Earth and Planetary Science Letters. https://doi.org/10.1016/j.epsl.2008.12.029
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