Spinel to plagioclase reaction in high heat flow mantle domains entrapped in uprising lavas: the case study of mantle xenoliths from Azrou-Timahdite, Middle Atlas, Morocco.
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| Title: | Spinel to plagioclase reaction in high heat flow mantle domains entrapped in uprising lavas: the case study of mantle xenoliths from Azrou-Timahdite, Middle Atlas, Morocco. |
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| Authors: | Orlando, Andrea1 (AUTHOR) orlando@igg.cnr.it, Tommasini, Simone1,2 (AUTHOR), Braschi, Eleonora1 (AUTHOR), Santo, Alba P.1,2 (AUTHOR), Langone, Antonio3 (AUTHOR), Barni, Lorenzo2 (AUTHOR), Sestini, Lorenzo2 (AUTHOR) |
| Source: | International Journal of Earth Sciences. Mar2025, Vol. 114 Issue 2, p305-321. 17p. |
| Subjects: | Earth sciences, Orthopyroxene, Inclusions in igneous rocks, Mantle plumes, Geology |
| Geographic Terms: | Morocco |
| Abstract: | Mantle xenoliths (lherzolites and a wehrlite) found in Cenozoic alkaline lavas from Azrou–Timahdite (Middle Atlas, Morocco) were petrographically studied with a particular emphasis on mineral chemistry. The most striking feature of these rocks is that plagioclase formed as a result of Al-rich spinel destabilization. This reaction is recorded in different steps and determined a variety of microstructures that allowed to identify four groups of xenoliths. Spinel chemistry generally becomes more refractory approaching the magma-xenolith interface. Geothermobarometry of both xenoliths and host lavas based on pyroxene equilibria and Forsterite—Anorthite—Ca Tschermak—Enstatite (FACE) geobarometer is consistent with a scenario in which spinel to plagioclase reaction was triggered at 0.7–1 GPa by hot (> 1100 °C) upraising magma in a mantle already characterized by a high heat flow (> 80 mW/m2). The entrapment of the xenoliths by the host magma en route to the surface caused a chemical interaction resulting in orthopyroxene destabilization with the formation of anorthoclase. The high geothermal gradient outlined by the mineral chemistry of the xenoliths is consistent with the geodynamic setting of the area, where the lithosphere has been thinned due to the upraising of a mantle plume active since Mesozoic and producing the Mesozoic Central High Atlas basalts. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Earth Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 183579389 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Spinel to plagioclase reaction in high heat flow mantle domains entrapped in uprising lavas: the case study of mantle xenoliths from Azrou-Timahdite, Middle Atlas, Morocco. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Orlando%2C+Andrea%22">Orlando, Andrea</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> orlando@igg.cnr.it</i><br /><searchLink fieldCode="AR" term="%22Tommasini%2C+Simone%22">Tommasini, Simone</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Braschi%2C+Eleonora%22">Braschi, Eleonora</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Santo%2C+Alba+P%2E%22">Santo, Alba P.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Langone%2C+Antonio%22">Langone, Antonio</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Barni%2C+Lorenzo%22">Barni, Lorenzo</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sestini%2C+Lorenzo%22">Sestini, Lorenzo</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Earth+Sciences%22">International Journal of Earth Sciences</searchLink>. Mar2025, Vol. 114 Issue 2, p305-321. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Earth+sciences%22">Earth sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Orthopyroxene%22">Orthopyroxene</searchLink><br /><searchLink fieldCode="DE" term="%22Inclusions+in+igneous+rocks%22">Inclusions in igneous rocks</searchLink><br /><searchLink fieldCode="DE" term="%22Mantle+plumes%22">Mantle plumes</searchLink><br /><searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Morocco%22">Morocco</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Mantle xenoliths (lherzolites and a wehrlite) found in Cenozoic alkaline lavas from Azrou–Timahdite (Middle Atlas, Morocco) were petrographically studied with a particular emphasis on mineral chemistry. The most striking feature of these rocks is that plagioclase formed as a result of Al-rich spinel destabilization. This reaction is recorded in different steps and determined a variety of microstructures that allowed to identify four groups of xenoliths. Spinel chemistry generally becomes more refractory approaching the magma-xenolith interface. Geothermobarometry of both xenoliths and host lavas based on pyroxene equilibria and Forsterite—Anorthite—Ca Tschermak—Enstatite (FACE) geobarometer is consistent with a scenario in which spinel to plagioclase reaction was triggered at 0.7–1 GPa by hot (> 1100 °C) upraising magma in a mantle already characterized by a high heat flow (> 80 mW/m2). The entrapment of the xenoliths by the host magma en route to the surface caused a chemical interaction resulting in orthopyroxene destabilization with the formation of anorthoclase. The high geothermal gradient outlined by the mineral chemistry of the xenoliths is consistent with the geodynamic setting of the area, where the lithosphere has been thinned due to the upraising of a mantle plume active since Mesozoic and producing the Mesozoic Central High Atlas basalts. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Earth Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=183579389 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00531-025-02493-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 305 Subjects: – SubjectFull: Earth sciences Type: general – SubjectFull: Orthopyroxene Type: general – SubjectFull: Inclusions in igneous rocks Type: general – SubjectFull: Mantle plumes Type: general – SubjectFull: Geology Type: general – SubjectFull: Morocco Type: general Titles: – TitleFull: Spinel to plagioclase reaction in high heat flow mantle domains entrapped in uprising lavas: the case study of mantle xenoliths from Azrou-Timahdite, Middle Atlas, Morocco. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Orlando, Andrea – PersonEntity: Name: NameFull: Tommasini, Simone – PersonEntity: Name: NameFull: Braschi, Eleonora – PersonEntity: Name: NameFull: Santo, Alba P. – PersonEntity: Name: NameFull: Langone, Antonio – PersonEntity: Name: NameFull: Barni, Lorenzo – PersonEntity: Name: NameFull: Sestini, Lorenzo IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 14373254 Numbering: – Type: volume Value: 114 – Type: issue Value: 2 Titles: – TitleFull: International Journal of Earth Sciences Type: main |
| ResultId | 1 |
