Dating metasomatic events in the lithospheric mantle beneath the Calatrava volcanic field (central Spain)

Carlos Villaseca, Elena A. Belousova, Dan N. Barfod, José M. González-Jiménez

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We report the first attempt to date metasomatic events in peridotite xenoliths from the Subcontinental Lithospheric Mantle (SCLM) beneath the Cenozoic Calatrava volcanic field of central Spain. The most metasomatized xenoliths of the El Aprisco olivine melilitite maar were selected to perform a geochronological study on metasomatic apatite (U-Pb method) and amphibole (Ar-Ar), integrated with an enlarged chemical data set on these minerals. The metasomatic agents in studied samples are mainly carbonate-rich ultra-alkaline melts of probable asthenospheric derivation. Some samples have been overprinted by more than one metasomatic event. The geochronological data confirm three metasomatic events that occurred within the SCLM beneath central Spain in Cretaceous (118 Ma), Oligocene (29 Ma), and Miocene (16-4 Ma) times, much earlier than the host volcanic magmatism. To date, no magmatic events of those ages have been recorded in central Spain. However, a correlation with several cycles of sporadic intraplate magmatism of alkaline affinity in the Iberian microplate is suggested. This study illustrates that the SCLM preserves the memory of a complex history of melt and/or fluid percolation processes in a metasomatic record that is generally unrelated to shallower crustal magmatic events.

LanguageEnglish
Pages192-208
Number of pages17
JournalLithosphere
Volume11
Issue number2
DOIs
Publication statusPublished - 1 Apr 2019

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mantle
magmatism
melilitite
melt
maar
microplate
peridotite
amphibole
apatite
Oligocene
olivine
Miocene
Cretaceous
carbonate
fluid
mineral
history
dating
method
chemical

Bibliographical note

Copyright the Author(s) 2018. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this

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abstract = "We report the first attempt to date metasomatic events in peridotite xenoliths from the Subcontinental Lithospheric Mantle (SCLM) beneath the Cenozoic Calatrava volcanic field of central Spain. The most metasomatized xenoliths of the El Aprisco olivine melilitite maar were selected to perform a geochronological study on metasomatic apatite (U-Pb method) and amphibole (Ar-Ar), integrated with an enlarged chemical data set on these minerals. The metasomatic agents in studied samples are mainly carbonate-rich ultra-alkaline melts of probable asthenospheric derivation. Some samples have been overprinted by more than one metasomatic event. The geochronological data confirm three metasomatic events that occurred within the SCLM beneath central Spain in Cretaceous (118 Ma), Oligocene (29 Ma), and Miocene (16-4 Ma) times, much earlier than the host volcanic magmatism. To date, no magmatic events of those ages have been recorded in central Spain. However, a correlation with several cycles of sporadic intraplate magmatism of alkaline affinity in the Iberian microplate is suggested. This study illustrates that the SCLM preserves the memory of a complex history of melt and/or fluid percolation processes in a metasomatic record that is generally unrelated to shallower crustal magmatic events.",
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Dating metasomatic events in the lithospheric mantle beneath the Calatrava volcanic field (central Spain). / Villaseca, Carlos; Belousova, Elena A.; Barfod, Dan N.; González-Jiménez, José M.

In: Lithosphere, Vol. 11, No. 2, 01.04.2019, p. 192-208.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Villaseca, Carlos

AU - Belousova, Elena A.

AU - Barfod, Dan N.

AU - González-Jiménez, José M.

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