Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)

In the Tethyan realm, leucocratic rocks were recognized as dikes and layers outcropping in the ophiolitic rocks of the Western Alps, in Corsica, and in the Northern Apennines. Several authors have suggested that the origin of leucocratic rocks is associated with partial melting of cumulate gabbro. M...

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Autores principales:	Giovanna Rizzo, Roberto Buccione, Michele Paternoster, Salvatore Laurita, Luigi Bloise, Egidio Calabrese, Rosa Sinisi, Giovanni Mongelli
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	leucocratic rocks geochemistry fractional crystallization ophiolite geodynamic evolution Pollino Massif Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/30208cc934964ed490cb7fbcaceff7b4
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spelling	oai:doaj.org-article:30208cc934964ed490cb7fbcaceff7b42021-11-25T18:26:42ZPetrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)10.3390/min111112642075-163Xhttps://doaj.org/article/30208cc934964ed490cb7fbcaceff7b42021-11-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1264https://doaj.org/toc/2075-163XIn the Tethyan realm, leucocratic rocks were recognized as dikes and layers outcropping in the ophiolitic rocks of the Western Alps, in Corsica, and in the Northern Apennines. Several authors have suggested that the origin of leucocratic rocks is associated with partial melting of cumulate gabbro. Major and trace elements composition and paragenesis provided information about the leucocratic rocks genetic processes. This research aims at disclosing, for the first time, the petrographical and geochemical features of Timpa delle Murge leucocratic rocks, Pollino Massif (southern Italy), in order to discuss their origin and geodynamic significance through a comparison with other Tethyan leucocratic rocks. These rocks are characterized by high amounts of silica with moderate alumina and iron-magnesium contents showing higher potassium contents than plagiogranites, due to plagioclase alteration to sericite. Plagioclase fractionation reflects negative Eu anomalies indicating its derivation from gabbroic crystal mushes. The chondrite normalized REEs patterns suggest the participation of partial melts derived from a metasomatized mantle in a subduction environment. The results reveal some similarities in composition with other Tethyan leucocratic rocks, especially those concerning Corsica and the Northern Alps. These new data provide further clues on the origin of these leucocratic rocks and the Tethyan area geodynamic evolution.Giovanna RizzoRoberto BuccioneMichele PaternosterSalvatore LauritaLuigi BloiseEgidio CalabreseRosa SinisiGiovanni MongelliMDPI AGarticleleucocratic rocksgeochemistryfractional crystallizationophiolitegeodynamic evolutionPollino MassifMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1264, p 1264 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	leucocratic rocks geochemistry fractional crystallization ophiolite geodynamic evolution Pollino Massif Mineralogy QE351-399.2
spellingShingle	leucocratic rocks geochemistry fractional crystallization ophiolite geodynamic evolution Pollino Massif Mineralogy QE351-399.2 Giovanna Rizzo Roberto Buccione Michele Paternoster Salvatore Laurita Luigi Bloise Egidio Calabrese Rosa Sinisi Giovanni Mongelli Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)
description	In the Tethyan realm, leucocratic rocks were recognized as dikes and layers outcropping in the ophiolitic rocks of the Western Alps, in Corsica, and in the Northern Apennines. Several authors have suggested that the origin of leucocratic rocks is associated with partial melting of cumulate gabbro. Major and trace elements composition and paragenesis provided information about the leucocratic rocks genetic processes. This research aims at disclosing, for the first time, the petrographical and geochemical features of Timpa delle Murge leucocratic rocks, Pollino Massif (southern Italy), in order to discuss their origin and geodynamic significance through a comparison with other Tethyan leucocratic rocks. These rocks are characterized by high amounts of silica with moderate alumina and iron-magnesium contents showing higher potassium contents than plagiogranites, due to plagioclase alteration to sericite. Plagioclase fractionation reflects negative Eu anomalies indicating its derivation from gabbroic crystal mushes. The chondrite normalized REEs patterns suggest the participation of partial melts derived from a metasomatized mantle in a subduction environment. The results reveal some similarities in composition with other Tethyan leucocratic rocks, especially those concerning Corsica and the Northern Alps. These new data provide further clues on the origin of these leucocratic rocks and the Tethyan area geodynamic evolution.
format	article
author	Giovanna Rizzo Roberto Buccione Michele Paternoster Salvatore Laurita Luigi Bloise Egidio Calabrese Rosa Sinisi Giovanni Mongelli
author_facet	Giovanna Rizzo Roberto Buccione Michele Paternoster Salvatore Laurita Luigi Bloise Egidio Calabrese Rosa Sinisi Giovanni Mongelli
author_sort	Giovanna Rizzo
title	Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)
title_short	Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)
title_full	Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)
title_fullStr	Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)
title_full_unstemmed	Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)
title_sort	petrography and geochemistry of the leucocratic rocks in the ophiolites from the pollino massif (southern italy)
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/30208cc934964ed490cb7fbcaceff7b4
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Petrography and Geochemistry of the Leucocratic Rocks in the Ophiolites from the Pollino Massif (Southern Italy)

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