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Geochemistry and tectonic setting of triassic magmatism from the Lercara Basin (Sicily, Italy)
Author(s)
Language
English
Obiettivo Specifico
2V. Struttura e sistema di alimentazione dei vulcani
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/86 (2017)
Pages (printed)
169-181
Issued date
June 2017
Subjects
tectonic setting of triassic magmatism
Abstract
Petrological and geochemical data of Triassic magmatic rocks from Lercara Basin
(Central Sicily), provide new information about the intraplate volcanism related to the
Pangea break up. The magmatic rocks crop out as subvolcanic bodies and are packed
in several Lower Triassic clayey lithologies correlated to the sedimentation inside the
Imerese and Sicano domains. The samples are splitted in two groups: the first includes
transitional to alkaline basalts, with sub-ophitic texture; the second includes more altered
rocks, with porphyritic texture, showing alkali basaltic to phonolitic compositions.
Major and trace element data of single groups show small variations indicating fractional
crystallization processes. Abundances and ratios of incompatible trace elements indicate
that rocks were formed in an intraplate continental environment from different mantle
sources with E-MORB to OIB-type compositions. Low partial melting degrees at the
transition between spinel and garnet lherzolite fields can be hypothesized for parental
magmas of the Lercara Basin. We propose that magma batches moved toward the
surface along lithospheric fractures originated by flexure and uplift of the Mesozoic
Pangea supercontinent.
(Central Sicily), provide new information about the intraplate volcanism related to the
Pangea break up. The magmatic rocks crop out as subvolcanic bodies and are packed
in several Lower Triassic clayey lithologies correlated to the sedimentation inside the
Imerese and Sicano domains. The samples are splitted in two groups: the first includes
transitional to alkaline basalts, with sub-ophitic texture; the second includes more altered
rocks, with porphyritic texture, showing alkali basaltic to phonolitic compositions.
Major and trace element data of single groups show small variations indicating fractional
crystallization processes. Abundances and ratios of incompatible trace elements indicate
that rocks were formed in an intraplate continental environment from different mantle
sources with E-MORB to OIB-type compositions. Low partial melting degrees at the
transition between spinel and garnet lherzolite fields can be hypothesized for parental
magmas of the Lercara Basin. We propose that magma batches moved toward the
surface along lithospheric fractures originated by flexure and uplift of the Mesozoic
Pangea supercontinent.
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Tetide. Rend. Soc. It. Min. Petr. 38, 163-174.
Bianchini G., Clocchiatti R., Coltorti M., Joron J.L., Vaccaro
C., 1998. Petrogenesis of mafic lavas from the northernmost
sector of the Iblean district (Sicily). European Journal of
Mineralogy 10, 301-315.
Bogaard P.J.F. and Wörner G., 2003. Petrogenesis of basanitic
to tholeiitic volcanic rocks from the Miocene Vogelsberg,
Central Germany. Journal of Petrology 44, 569-602.
Bortolotti V., Chiari M., Marcucci M., Photiades A., Principi
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ophiolites from the Othrys area (Greece): implication for the
Triassic evolution of the Vardar ocean. Ofioliti, 33, 135-151.
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Bruker, 2015a. Product Overview: Advanced Analytical
Solutions.
Bruker, 2015b. XRF Lab Report - S8 TIGER plus GEO-QUANT
M, 6 pp.
Buratti N. and Carillat A., 2002. Palynostratigraphy of the
Mufara Formatio (Middle-Upper Triassic, Sicily). Rivista
Italiana di Paleontologia e Stratigrafia 108, 101-117.
Caflisch L., 1966. La Geologia di Monti di Palermo. Rivista
Italiana di Paleontologia e Stratigrafia 12 , 1-797 pp.
Carcione L., 2007. Sedimentology, Biostratigraphy and
Mineralogy of the Lercara Formation (Triassic, Sicily) and its
Palaeogeographic Implications. Thèse Université de Genève,
Terre et Environnement 68, 247 pp.
Carrilat A. and Martini I.R., 2009. Palaeoenvironmental
reconstruction of the Mufara Formation (Upper Triassic,
Sicily): high resolution sedimentology, biostratigraphy and
sea-level changes. Palaeogeography, Palaeoclimatology,
Palaeoecology 283, 60-76.
Carrillat A., 2001. Palaeoenvironmental reconstruction of the
Mufara Formation (Upper Triassic, Sicily): biostratigraphy,
organic facies, sedimentological and geochemical approach.
Doctoral Thesis, Département de Géologie et Paléontologie,
Terre et Environment, University of Geneva, 145 pp.
Castany G., 1956. Essai de synthese geologique du territoire
Tunisie-Sicile. Annales des Mines et de la Géologie 16, 96 pp.
Catalano R. and D’Argenio B., 1978. An essay of palinspastic
restoration across western Sicily. Geologica Romana 17, 145-
159.Catalano R. and Montanari L., 1979. Geologia dei Monti di
Trabia-Termini Imerese e dei Monti Sicani orientali (Fogli
Bagheria e Termini Imerese, Sicilia centro settentrionale).
Rendiconto dell’Accademia di Scienze Fisiche e Matematiche
della Società Nazionale di Scienze, Lettere e Arti in Napoli,
46 pp.
Catalano R., Di Stefano P., Gullo M., Kozur H., 1988a. The
stratigraphic and paleogeographic significance of the rich
occurrence of Pseudofunishius (Conodonta) in pelagic late
Ladinian-early Carnian sediments of western Sicily. In: Atti
del 74th Congresso della Società Geologica Italiana, A, pp.
114-118, Sorrento.
Catalano R., Di Stefano P. and Kozur H., 1988b. First evidence
for lower Permian Albaillellacea (Radiolarian) in the Tethyan
Eurasia. In: Atti del 74th Congresso della Società Geologica
Italiana, Sorrento, A, 119-123.
Catalano R., Di Stefano P., Kozur H., 1988c. New results in
the Permian and Triassic stratigraphy of western Sicily with
special reference to the section at Torrente San Calogero SW of
Pietra di Salomone (Sosio Valley). In: Atti del 74th Congresso
della Società Geologica Italiana, Sorrento, A, 126-132.
Catalano R., Di Stefano P., Kozur H., 1991. Permian
circumpacific deep-water faunas from the western Tethys
(Sicily, Italy) – New evidences for the position of the Permian
Tethys. Palaeogeography, Palaeoclimatology, Palaeoecology
87, 75-108.
Catalano R., Avellone G., Basilone L., Gasparo Morticelli M., Lo
Cicero G., 2010. Note illustrative del F. 608 “Caccamo” della
Carta Geologica d’Italia alla scala 1:50.000. Con contributi
di: C. Gugliotta, C. Di Maggio, A. Contino, C. Albanese, G.
Lena, A. Sulli, E. Di Stefano and S. Bonomo. 221 pp., 73 ff.,
ISPRA.
Cirilli S., Montanari L. and Panzanelli Fratoni R., 1988.
Palinomorfi nella Formazione Lercara: nuovi elementi di
datazione. In: Atti del 74° Congresso della Società Geologica
Italiana Sorrento, Abstract B, 140-142.
Cirilli S., Montanari L., Panzanelli Fratoni R., 1990.
Palynomorphs from the Lercara Formation (Sicily): New
biostrtigraphic data. Bollettino della Società Geologica
Italiana 109, 123-133.
Cirrincione R., Fiannacca P., Lo Giudice A., Pezzino A., 2005.
Evidence of early Palaeozoic continental rifting from mafic
metavolcanics of southern Peloritani Mountains (North-
Eastern Sicily, Italy). Ofioliti, 30, 15-25.
Cirrincione R., Fiannacca P., Lustrino M., Romano V., Tranchina
A., 2014. Late Triassic tholeiitic magmatism in Western
Sicily: A possible extension of the Central Atlantic Magmatic
Province (CAMP) in the Central Mediterranean area. Lithos
188, 60-71.
Cirrincione R., Fiannacca P., Lustrino M., Romano V., Tranchina
A.,Villa I.M., 2016. Enriched asthenosphere melting beneath
the nascent North African margin: trace element and Nd
isotope evidence in middle-late Triassic alkali basalts from
central Sicily (Italy). International Journal of Earth Sciences
105, 595-609.
Civetta L., D’Antonio M., Orsi G., Tilton G.R., 1998. The
geochemistry of volcanic rocks from Pantelleria Island, Sicily
Channel: petrogenesis and characteristics of the mantle source
region. Journal of Petrology 39, 1453-1491.
Di Bella M., Russo S., Pino P., Baldanza A., Sabatino G., 2010.
Evidence of Early Oligocene submarine volcanism in the
Caltanissetta Basin (Central-Southern Sicily). Periodico di
Mineralogia 79, 1-20.
Di Stefano P. and Gullo M., 1997a. Permian deposits of Sicily: a
review. Geodiversitas 19, 193-202.
Di Stefano P. and Gullo M., 1997b. Late Paleozoic-Early
Mesozoic stratigraphy and paleogeography of Sicily. In:
Catalano R. (Ed.), Time scales and basin dynamics: Sicily,
the adjacent Mediterranean and and other natural laboratories.
Field Workshop in western Sicily, 8th Workshop of the ILP
Task Force “Origins of Sedimentary Basins”, R.
Fabiani R. and Trevisan L., 1937. Di alcune novita geologiche
nel territorio del foglio di Termini Imerese (Palermo).
Bollettino della Societa di Scienze Naturali ed Economiche
19, 1-6.
Fabiani R. and Ruiz C., 1933. Sui giacimenti permiani del Sosio
(Palermo) e sugli strofomenidi in essi trovati. Memorie della
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