Relationships between intermediate and acidic rocks in orogenic granitoid suites: petrological, geochemical and isotopic (Sr, Nd, Pb) data from Capo Vaticano (southern Calabria, Italy)

Rottura, A.; Moro, A. Del; Pinarelli, L.; Petrini, Riccardo; Peccerillo, Angelo; Caggianelli, Alfredo; Bargossi, Giuseppe Maria; Piccarreta, G.

doi:10.1016/0009-2541(91)90054-u

Cited by 69 publications

(50 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gasperini et al 2000Gasperini et al , 2002Lustrino et al 2013), but a few southern occurrences show more radiogenic Pb isotope ratios and plot close to or within the field of Sicily rocks ( Fig. 6b and c (Vollmer 1976) or the basement rocks from Calabria (Rottura et al 1991; Fig. 6b and c).…”

Section: Isotope Geochemistrymentioning

confidence: 63%

See 1 more Smart Citation

Magmatism, mantle evolution and geodynamics at the converging plate margins of Italy

Peccerillo

Frezzotti

2015

JGS

Self Cite

View full text Add to dashboard Cite

Abstract:The Plio-Quaternary magmatism in the Tyrrhenian Sea area exhibits wide compositional variations, which cover almost entirely those observed for volcanic rocks worldwide. Some volcanoes (Etna, Iblei, Sardinia, etc.) range from tholeiitic to Na-alkaline, and display elemental and isotope signatures typical of FOZO and EM-1 ocean-island basalts (OIB). Other volcanoes (Aeolian Arc, Italian peninsula) range from calc-alkaline-shoshonitic to K-alkaline, exhibit typical 'subduction-related' trace element signatures (low Ta-Nb, high Rb-Cs-LREE), and show a large range of radiogenic isotope ratios, from mantle-like in the Aeolian Arc to crustal-like in central Italy. Geochemical data suggest that OIB-type magmatism originated in lithosphere-asthenosphere sources that were unaffected by recent subduction. In contrast, subduction-related magmas come from mantle sources that underwent Eocene to present mixing with various amounts and types of subducted crustal components. Fluxing of the mantle wedge by water-rich fluids from a mid-ocean ridge basalt-type slab occurred in the southern Tyrrhenian Sea, whereas interaction between peridotite and various types of sediments occurred in central Italy. These contrasting styles of mantle contaminations relate to the nature (oceanic or continental) of the foreland, slab geometry and pre-metasomatic mantle compositions, which vary greatly along the Apennine arc and are the reason for the formation of the wide variety of orogenic magmas in Italy.

show abstract

Section: Isotope Geochemistrymentioning

confidence: 63%

“…Phengite breakdown along the deepest tracts of subduction zones generates fluids rich in LILE that are added to the mantle (Zindler & Hart 1986;Stracke et al 2005;Jackson & Dasgupta 2008). Data for Calabria basement rocks are from Rottura et al (1991).…”

Section: Element Transfer In the Subduction Environmentmentioning

confidence: 99%

Magmatism, mantle evolution and geodynamics at the converging plate margins of Italy

Peccerillo

Frezzotti

2015

JGS

Self Cite

View full text Add to dashboard Cite

show abstract

“…Three extreme possibilities can potentially account for the Sr isotope decrease: (i) assimilation of unradiogenic country rock material, and (ii) gradual or (iii) instantaneous change of 87 Sr= 86 Sr in the feeding magma. Crustal assimilation is incompatible with the high 87 Sr= 86 Sr of the crustal basement of southern Italy [24,25] and also requires special pleading to preserve a substantially constant [Sr] in the erupted magma (Fig. 2).…”

Section: Discussionmentioning

confidence: 99%

Sr isotope evidence for short magma residence time for the 20th century activity at Stromboli volcano, Italy

Francalanci

Tommasini

Conticelli

et al. 1999

Earth and Planetary Science Letters

107

109

View full text Add to dashboard Cite

Stromboli is the type locality of continuous and moderately explosive volcanic activity. Monitoring temporal variations in the composition of the material erupted allows constraints to be made on the magma chamber dynamics and volcanic hazard. Here we present an Sr isotope survey of scoriae and lavas erupted from Stromboli volcano during this century. The material erupted is transitional between shoshonite and High-K basalt, with relatively constant major and trace element composition. This implies no substantial physical separation of minerals during crystallization (ca. 50 vol% minerals in both lavas and scoriae) and hence a relatively homogeneous reservoir. 87 Sr= 86 Sr values are constant from 1900 to ca. 1980, then, beginning prior to the major lava flow eruption of December 1985, there is a smooth decrease. The Sr isotope decrease records the arrival of a new feeding magma, and allows estimation of the magma residence time and the volume of the reservoir beneath Stromboli volcano. Our results, along with a critical assessment of magma flux estimates, are best reconciled with steady state conditions, and establish the existence of a relatively small, ¾0.3 to 0.04 km 3 , reservoir with a magma residence time .− / of ca. 19 years. Monitoring the temporal variation of isotopic ratios in active volcanoes appears a successful tool in forecasting some major volcanic eruptions.

show abstract

“…(7). Values of 18 O = +16‰, and 87 Sr/ 86 Sr = 0.725 have been assumed for crust end-member [51]. As explained earlier, mixtures of crust and mantle (i.e., addition of continental crust to the mantle wedge) have very variable Sr-isotope ratios that depend on the amounts of crustal end-member.…”

Section: Comparison With Nearby Aeolian Islands Of Alicudi and Salinamentioning

confidence: 99%

Oxygen Isotopic Variations in the Clinopyroxene from the Filicudi Volcanic Rocks (Aeolian Islands, Italy): Implications for Open-System Magma Evolution

Santo¹,

Peccerillo²

2008

TOMJ

Self Cite

View full text Add to dashboard Cite

Oxygen isotope data are reported for clinopyroxene phenocrysts from volcanic rock samples from Filicudi island, Italy, with the aim of investigating mechanisms of magma evolution and mantle source characteristics in a continental arc volcano. Filicudi rocks range from calc-alkaline basalt to high-K andesite and dacite. Mafic rocks have MgO 6-7 wt%, Mg# 60, Ni < 50 ppm and Cr < 200 ppm, suggesting they represent evolved melts from more primitive mantle-derived parents. Variations of Sr-Nd isotope ratios against silica and MgO suggest magma evolution under opensystem. Oxygen isotope ratios on clinopyroxene phenocrysts from representative rocks are in the range 18 O cpx = + 5.37 to + 6.20 ‰ SMOW, corresponding to 18 O melt = + 5.6 to + 6.4 ‰ and display an overall, but poorly defined, positive correlation with 87 Sr/ 86 Sr and MgO and a rough negative correlation with SiO 2 . Basalts exhibit the highest 18 O cpx values for the volcanic series studied. Together, major, trace element and isotopic data indicate complex, multistage polybaric evolutionary processes for the Filicudi magmas. A process of fractional crystallisation, accompanied by variable degrees of crustal assimilation, best explains the isotopic and petrological data of the Filicudi volcanics. Evolution processes are inferred to have occurred in distinct magma reservoirs sited at different depths. Magma contamination affected basalts more extensively than andesitic and dacitic magmas. This was a consequence of the higher temperature and lower viscosity of mafic melts that were able to assimilate higher amounts of crustal wall rocks. Therefore, andesites and dacites preserved stable and radiogenic isotopic compositions more closely than basalts. Combined trace element and isotopic data suggest that primitive magmas at Filicudi were generated in a heterogeneous and metasomatised mantle source, which underwent contamination by slab-derived fluids. When compared with the nearby islands, isotopic variations of Filicudi rocks resemble more closely those found at Alicudi than at Salina and Vulcano. This suggests that the same kind of evolutionary processes occurred in the western island of Filicudi and Alicudi, whereas at Salina and Vulcano, in the central arc, magmas typically evolved by AFC processes, generating derivative melts that display higher Sr-O isotope compositions compared to parent basalts. These contrasting styles of magma evolution may be related to different structures of the plumbing systems of volcanic islands that were constructed in different sectors of the arc.

show abstract

Relationships between intermediate and acidic rocks in orogenic granitoid suites: petrological, geochemical and isotopic (Sr, Nd, Pb) data from Capo Vaticano (southern Calabria, Italy)

Cited by 69 publications

References 30 publications

Magmatism, mantle evolution and geodynamics at the converging plate margins of Italy

Magmatism, mantle evolution and geodynamics at the converging plate margins of Italy

Sr isotope evidence for short magma residence time for the 20th century activity at Stromboli volcano, Italy

Oxygen Isotopic Variations in the Clinopyroxene from the Filicudi Volcanic Rocks (Aeolian Islands, Italy): Implications for Open-System Magma Evolution

Contact Info

Product

Resources

About