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Melluso, Leone, Guarino, Vincenza, Lustrino, Michele, Morra, Vincenzo, de' Gennaro, Roberto (2017) TheREE-and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts. Mineralogical Magazine, 81 (2) 217-250 doi:10.1180/minmag.2016.080.122

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Reference TypeJournal (article/letter/editorial)
TitleTheREE-and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts
JournalMineralogical Magazine
AuthorsMelluso, LeoneAuthor
Guarino, VincenzaAuthor
Lustrino, MicheleAuthor
Morra, VincenzoAuthor
de' Gennaro, RobertoAuthor
Year2017 (April)Volume81
Issue2
PublisherMineralogical Society
DOIdoi:10.1180/minmag.2016.080.122Search in ResearchGate
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Mindat Ref. ID244883Long-form Identifiermindat:1:5:244883:5
GUID0
Full ReferenceMelluso, Leone, Guarino, Vincenza, Lustrino, Michele, Morra, Vincenzo, de' Gennaro, Roberto (2017) TheREE-and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts. Mineralogical Magazine, 81 (2) 217-250 doi:10.1180/minmag.2016.080.122
Plain TextMelluso, Leone, Guarino, Vincenza, Lustrino, Michele, Morra, Vincenzo, de' Gennaro, Roberto (2017) TheREE-and HFSE-bearing phases in the Itatiaia alkaline complex (Brazil) and geochemical evolution of feldspar-rich felsic melts. Mineralogical Magazine, 81 (2) 217-250 doi:10.1180/minmag.2016.080.122
Abstract/NotesAbstractThe Late Cretaceous Itatiaia complex is made up of nepheline syenite grading to peralkaline varieties, quartz syenite and granite, emplaced in the metamorphic rocks of the Serra do Mar, SE Brazil. The nepheline syenites are characterized by assemblages with alkali feldspar, nepheline, Fe-Ti oxides, clinopyroxene, amphibole, apatite and titanite, while the peralkaline nepheline syenites have F-disilicates (rinkite, wöhlerite, hiortdahlite, lÄvenite), britholite and pyrophanite as the accessory phases. The silica-oversaturated rocks have alkali feldspar, plagioclase, quartz, amphibole, clinopyroxene and Fe-Ti oxides; the chevkinite-group minerals are the featured accessory phases and are found with allanite, fluorapatite, fluorite, zircon, thorite, yttrialite, zirconolite, pyrochlore and yttrocolumbite. The major- and trace-element composition of the Itatiaia rocks have variations linked to the amount of accessory phases, have smooth, enriched chondritenormalized rare-earth element (REE) distribution patterns in the least-evolved nepheline syenites and convex patterns in the most-evolved nepheline syenites. The REE distribution patterns of the quartz syenites and granites show a typical pattern caused by fractional crystallization of feldspar and amphibole, in an environment characterized by relatively high oxygen fugacity (>NiNiO buffer) and high concentrations of H2O and F, supporting the crystallization of hydrous phases, fluorite and F-disilicates. The removal of small amounts of titanite in the transition from the least-evolved to the most-evolved nepheline syenites stems from petrogenetic models involving REE, and is shown to be a common feature of the magmatic evolution of many other syenitic/ trachytic/ phonolitic complexes of the Serra do Mar and elsewhere.

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LocalityCitation Details
Itatiaia alkaline complex, Itatiaia, Rio de Janeiro, Brazil

Mineral Occurrences

LocalityMineral(s)
Itatiaia alkaline complex, Itatiaia, Rio de Janeiro, Brazilⓘ Allanite Group, ⓘ Amphibole Supergroup, ⓘ Apatite, ⓘ Chevkinite Group, ⓘ Clinopyroxene Subgroup, ⓘ Fluorapatite, ⓘ Fluorite, ⓘ Hiortdahlite, ⓘ K Feldspar, ⓘ LĂ„venite, ⓘ Nepheline, ⓘ Plagioclase, ⓘ Pyrochlore Group, ⓘ Pyrophanite, ⓘ Quartz, ⓘ Rinkite-(Ce), ⓘ Thorite, ⓘ Titanite, ⓘ Wöhlerite, ⓘ Yttrialite-(Y), ⓘ Yttrocolumbite-(Y), ⓘ Zircon, ⓘ Zirconolite

See Also

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Guarino, Vincenza, Lustrino, Michele, Zanetti, Alberto, Tassinari, Colombo C.G., Ruberti, Excelso, de' Gennaro, Roberto, Melluso, Leone (2021) Mineralogy and geochemistry of a giant agpaitic magma reservoir: The Late Cretaceous Poços de Caldas potassic alkaline complex (SE Brazil) Lithos, 398. 106330pp. doi:10.1016/j.lithos.2021.106330
Guarino, Vincenza, Gennaro, Roberto de', Melluso, Leone, Ruberti, Excelso, Azzone, Rogério G. (2019) The Transition from Miaskitic to Agpaitic Rocks, as Highlighted by the Accessory Phase Assemblages in the Passa Quatro Alkaline Complex (SouthEastern Brazil) The Canadian Mineralogist, 57 (3) 339-361 doi:10.3749/canmin.1800073
Rocco, Ivana, Lustrino, Michele, Morra, Vincenzo, Melluso, Leone (2012) Petrological, geochemical and isotopic characteristics of the lithospheric mantle beneath Sardinia (Italy) as indicated by ultramafic xenoliths enclosed in alkaline lavas. International Journal of Earth Sciences, 101 (5) 1111-1125 doi:10.1007/s00531-011-0729-0
Guarino, Vincenza, Solone, Roberto, Casalini, Martina, Franciosi, Luigi, Dallai, Luigi, Morra, Vincenzo, Conticelli, Sandro, Melluso, Leone (2024) The geochemistry of leucite-bearing lavas from early stages of the Somma-Vesuvius volcanic complex: Feeder systems and mantle enrichment processes in the Neapolitan district of the Roman Magmatic Province. Geochemistry, 84 (1) 126076 doi:10.1016/j.chemer.2023.126076
MELLUSO, LEONE, DE' GENNARO, ROBERTO, FEDELE, LORENZO, FRANCIOSI, LUIGI, MORRA, VINCENZO (2012) Evidence of crystallization in residual, Cl–F-rich, agpaitic, trachyphonolitic magmas and primitive Mg-rich basalt–trachyphonolite interaction in the lava domes of the Phlegrean Fields (Italy) Geological Magazine, 149 (3) 532-550 doi:10.1017/s0016756811000902
MELLUSO, LEONE, DE' GENNARO, ROBERTO, FEDELE, LORENZO, FRANCIOSI, LUIGI, MORRA, VINCENZO (2012) Evidence of crystallization in residual, Cl–F-rich, agpaitic, trachyphonolitic magmas and primitive Mg-rich basalt–trachyphonolite interaction in the lava domes of the Phlegrean Fields (Italy) – CORRIGENDUM. Geological Magazine, 149 (3) 551 doi:10.1017/s0016756811001099
Cucciniello, Ciro, Melluso, Leone, le Roex, Anton P., Jourdan, Fred, Morra, Vincenzo, de’ Gennaro, Roberto, Grifa, Celestino (2017) From olivine nephelinite, basanite and basalt to peralkaline trachyphonolite and comendite in the Ankaratra volcanic complex, Madagascar: 40 Ar/ 39 Ar ages, phase compositions and bulk-rock geochemical and isotopic evolution. Lithos, 274. 363-382 doi:10.1016/j.lithos.2016.12.026
Rocco, Ivana, Lustrino, Michele, Zanetti, Alberto, Morra, Vincenzo, Melluso, Leone (2013) Petrology of ultramafic xenoliths in Cenozoic alkaline rocks of northern Madagascar (Nosy Be Archipelago) Journal of South American Earth Sciences, 41. 122-139 doi:10.1016/j.jsames.2012.06.012
Cariddi, Bruna, Guarino, Vincenza, Costamagna, Luca Giacomo, D’Antonio, Massimo, Jourdan, Fred, Morra, Vincenzo, Melluso, Leone (2023) Magmatic evolution in an open and polybaric system feeding the Miocene calcalkaline lava domes of Cixerri (SW Sardinia, Italy) Geochemistry, 83 (4) 126001 doi:10.1016/j.chemer.2023.126001
Lustrino, Michele, Melluso, Leone, Morra, Vincenzo (2002) The transition from alkaline to tholeiitic magmas: a case study from the Orosei-Dorgali Pliocene volcanic district (NE Sardinia, Italy) Lithos, 63 (1) 83-113 doi:10.1016/s0024-4937(02)00113-5
Brotzu, P., Gomes, C.B., Melluso, L., Morbidelli, L., Morra, V., Ruberti, E. (1997) Petrogenesis of coexisting SiO2-undersaturated to SiO2-oversaturated felsic igneous rocks: The alkaline complex of Itatiaia, southeastern Brazil. Lithos, 40 (2) 133-156 doi:10.1016/s0024-4937(97)00007-8
 
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