Article (Scientific journals)
Origin of a carbonate-bearing fluorapatite from Tertiary volcanics of the Veneto Volcanic Province, Italy
Cipriani, Anna; Giovanardi, Tommaso; Mazzucchelli, Maurizio et al.
2023In Mineralogy and Petrology
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Keywords :
Alkaline melt; Carbonate-bearing fluorapatite; Cronstedtite; Megacryst; Metasomatism; Nelsonitic melt; Veneto Volcanic Province; Geophysics; Geochemistry and Petrology
Abstract :
[en] We present chemical and mineralogical data on a megacryst of a unique carbonate-bearing fluorapatite from altered Tertiary volcanics of the Veneto Volcanic Province (VVP) in the western Lessini Mountain range (Veneto, northern Italy). The cm-sized specimen was identified and characterized by scanning electron microscope (SEM), X-ray powder diffraction (XRPD), micro-Raman spectroscopy and electron probe microanalyses. Major and trace elements of the carbonate-bearing fluorapatite are consistent with the crystallization at depth from a nelsonitic melt or an evolved alkaline melt derived from a mantle source metasomatized by carbonate-rich fluids. The Sr and Nd isotopic composition fits with the lavas and xenoliths from the VVP showing a DM-HIMU affinity with addition of a crustal, possibly carbonate, component. Our data are in agreement with a recent geodynamic model for the hybridization of the VVP mantle triggered by breakdown of carbonates within the subducting Tethyan oceanic slab. Cronstedtite, chabazite-Ca, calcite associated with reaction rims of amphibole and secondary carbonate-rich fluorapatite within the megacryst originated from low temperature hydrothermal alteration of the volcanics. Cronstedtite is the first occurrence in the VVP area.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Cipriani, Anna ;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy ; Lamont-Doherty Earth Observatory, Columbia University, Palisades, United States
Giovanardi, Tommaso;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy
Mazzucchelli, Maurizio;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy
Lugli, Federico;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy ; Department of Cultural Heritage, University of Bologna, Ravenna, Italy
Sforna, Marie-Catherine ;  Université de Liège - ULiège > Département de géologie > Early Life Traces & Evolution-Astrobiology
Gualtieri, Alessandro F.;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy
Di Giuseppe, Dario;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy
Gaeta, Mario;  Università degli Studi di Roma, Roma, Italy
Brunelli, Daniele;  Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy ; Institute of Environmental Geology and Geoengineering, IGAG-CNR, Roma, Italy
Language :
English
Title :
Origin of a carbonate-bearing fluorapatite from Tertiary volcanics of the Veneto Volcanic Province, Italy
Publication date :
2023
Journal title :
Mineralogy and Petrology
ISSN :
0930-0708
eISSN :
1438-1168
Publisher :
Springer
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
MIUR - Ministero dell'Istruzione, dell'Università e della Ricerca [IT]
Funding text :
A.C. acknowledges funding by the “Progetti di ricerca di Rilevante Interesse Nazionale” PRIN – Bando 2017 – Protocol 20178LPCPW. D.B. acknowledges funding by PRIN – Bando 2017 – Protocol 2017KY5ZX8. M.M. acknowledges funding by PRIN – Bando 2015 – Protocol 20158A9CBM_005. A.F.G acknowledges funding by PRIN – Bando 2017 – Protocol 20173X8WA4.
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