DISSOLUTION OF TONALITIC ENCLAVES IN ASCENDING HYDROUS GRANITIC MAGMAS: AN EXPERIMENTAL STUDY

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dc.contributor.author García-Moreno O.
dc.contributor.author Corretgé L.G.
dc.contributor.author Castro A.
dc.contributor.author El-Hmidi H.
dc.date.accessioned 2025-01-25T04:34:00Z
dc.date.available 2025-01-25T04:34:00Z
dc.date.issued 2006
dc.identifier https://www.elibrary.ru/item.asp?id=14483102
dc.identifier.citation Lithos, 2006, 89, 3-4, 245-258
dc.identifier.issn 0024-4937
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/47532
dc.description.abstract Dissolution of natural mafic magmatic enclaves in a hydrous leucogranitic synthetic melt has been tested experimentally. Results suggest that the mechanism of enclave dissolution is a potential hybridization process in granitic systems. Experiments performed in decompression, simulating ascending magmas, show interesting results: from 10 kbar to 4 kbar, for a given temperature, enhanced dissolution of the tonalitic enclave into the melt has been observed, compared with experiments at constant pressure. Furthermore, the composition of the melt changed to higher CaO, FeO and MgO contents. Dissolution textures on relict crystals from the tonalitic enclave were monitored. These results have implications for the generation of peraluminous monzogranites and granodiorites and an example for the Cabeza de Araya (Cáceres, Spain) from the "serie mixta" of the Iberian Massif is given. The tonalitic enclaves that are partially dissolved may be early or coeval intrusions into the granite magma or even into the source migmatitic area. Many mineralogical, geochemical and isotopic features of monzogranites (e.g.: reverse zoning in plagioclase, low Sr isotopic ratios) are accounted for by this mechanism of enclave dissolution during ascent and emplacement. © 2006 Elsevier B.V. All rights reserved.
dc.subject DECOMPRESSION
dc.subject DISSOLUTION
dc.subject HYBRIDIZATION
dc.subject IBERIAN GRANITES
dc.subject MAGMA MIXING
dc.subject MME
dc.subject MONZOGRANITES
dc.subject TONALITIC ENCLAVES
dc.title DISSOLUTION OF TONALITIC ENCLAVES IN ASCENDING HYDROUS GRANITIC MAGMAS: AN EXPERIMENTAL STUDY
dc.type Статья
dc.identifier.doi 10.1016/j.lithos.2005.12.008


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