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Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece

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Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece. / Elburg, M. A.; Smet, I.; Van den haute, P.; Vanhaecke, F.; Klaver, M.; Andersen, T.

In: Lithos, Vol. 318-319, 01.10.2018, p. 386-398.

Research output: Contribution to journalArticle

Harvard

Elburg, MA, Smet, I, Van den haute, P, Vanhaecke, F, Klaver, M & Andersen, T 2018, 'Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece', Lithos, vol. 318-319, pp. 386-398. https://doi.org/10.1016/j.lithos.2018.08.029

APA

Elburg, M. A., Smet, I., Van den haute, P., Vanhaecke, F., Klaver, M., & Andersen, T. (2018). Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece. Lithos, 318-319, 386-398. https://doi.org/10.1016/j.lithos.2018.08.029

Vancouver

Elburg MA, Smet I, Van den haute P, Vanhaecke F, Klaver M, Andersen T. Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece. Lithos. 2018 Oct 1;318-319:386-398. https://doi.org/10.1016/j.lithos.2018.08.029

Author

Elburg, M. A. ; Smet, I. ; Van den haute, P. ; Vanhaecke, F. ; Klaver, M. ; Andersen, T. / Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece. In: Lithos. 2018 ; Vol. 318-319. pp. 386-398.

Bibtex

@article{f7bfdab6783f466da4f9d646126c4272,
title = "Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece",
abstract = "New Sr-Nd-Hf-Pb isotope data for volcanic rocks from the peninsula of Methana (South Aegean Active Volcanic Arc, Greece) show a wide variation, and more ‘enriched’ isotopic signatures (e.g. elevated 87Sr/86Sr at 0.705–0.709) than those of other active Aegean volcanic centres, all located on thinner crust. The data set is best explained by polybaric AFC processes, with contaminants similar to country rocks and xenoliths, showing moderately high 87Sr/86Sr ratios, and with isotopically more evolved lower crust, similar to the pre-Alpine Ios basement. Pb isotope ratios show some minor influence of assimilation of fluid-altered volcanic cumulates. Intermediate lava domes with mafic enclaves were formed during periods of compression, whereas an extensional period saw the deposition of explosive products of bimodal composition, with the more felsic deposits showing the most pronounced influence of crustal assimilation. The latter likely represent stalled magmas from an earlier compressional period, which were remobilised and flushed out by ascending mafic magmas during extension. Recognition of these volcanological, geochemical and isotopic characteristics of deposits associated with extensional tectonics in a modern arc will enable us to use these criteria to infer paleo-tectonics from older volcanic deposits.",
keywords = "Aegean Arc, Crustal contamination, Extension, Radiogenic isotopes, Subduction",
author = "Elburg, {M. A.} and I. Smet and {Van den haute}, P. and F. Vanhaecke and M. Klaver and T. Andersen",
year = "2018",
month = "10",
day = "1",
doi = "10.1016/j.lithos.2018.08.029",
language = "English",
volume = "318-319",
pages = "386--398",
journal = "Lithos",
issn = "0024-4937",
publisher = "Elsevier",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Extreme isotopic variation documents extensional tectonics in arc magmas from Methana, Greece

AU - Elburg, M. A.

AU - Smet, I.

AU - Van den haute, P.

AU - Vanhaecke, F.

AU - Klaver, M.

AU - Andersen, T.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - New Sr-Nd-Hf-Pb isotope data for volcanic rocks from the peninsula of Methana (South Aegean Active Volcanic Arc, Greece) show a wide variation, and more ‘enriched’ isotopic signatures (e.g. elevated 87Sr/86Sr at 0.705–0.709) than those of other active Aegean volcanic centres, all located on thinner crust. The data set is best explained by polybaric AFC processes, with contaminants similar to country rocks and xenoliths, showing moderately high 87Sr/86Sr ratios, and with isotopically more evolved lower crust, similar to the pre-Alpine Ios basement. Pb isotope ratios show some minor influence of assimilation of fluid-altered volcanic cumulates. Intermediate lava domes with mafic enclaves were formed during periods of compression, whereas an extensional period saw the deposition of explosive products of bimodal composition, with the more felsic deposits showing the most pronounced influence of crustal assimilation. The latter likely represent stalled magmas from an earlier compressional period, which were remobilised and flushed out by ascending mafic magmas during extension. Recognition of these volcanological, geochemical and isotopic characteristics of deposits associated with extensional tectonics in a modern arc will enable us to use these criteria to infer paleo-tectonics from older volcanic deposits.

AB - New Sr-Nd-Hf-Pb isotope data for volcanic rocks from the peninsula of Methana (South Aegean Active Volcanic Arc, Greece) show a wide variation, and more ‘enriched’ isotopic signatures (e.g. elevated 87Sr/86Sr at 0.705–0.709) than those of other active Aegean volcanic centres, all located on thinner crust. The data set is best explained by polybaric AFC processes, with contaminants similar to country rocks and xenoliths, showing moderately high 87Sr/86Sr ratios, and with isotopically more evolved lower crust, similar to the pre-Alpine Ios basement. Pb isotope ratios show some minor influence of assimilation of fluid-altered volcanic cumulates. Intermediate lava domes with mafic enclaves were formed during periods of compression, whereas an extensional period saw the deposition of explosive products of bimodal composition, with the more felsic deposits showing the most pronounced influence of crustal assimilation. The latter likely represent stalled magmas from an earlier compressional period, which were remobilised and flushed out by ascending mafic magmas during extension. Recognition of these volcanological, geochemical and isotopic characteristics of deposits associated with extensional tectonics in a modern arc will enable us to use these criteria to infer paleo-tectonics from older volcanic deposits.

KW - Aegean Arc

KW - Crustal contamination

KW - Extension

KW - Radiogenic isotopes

KW - Subduction

UR - http://www.scopus.com/inward/record.url?scp=85052968606&partnerID=8YFLogxK

U2 - 10.1016/j.lithos.2018.08.029

DO - 10.1016/j.lithos.2018.08.029

M3 - Article

VL - 318-319

SP - 386

EP - 398

JO - Lithos

JF - Lithos

SN - 0024-4937

ER -