Trace element and isotopic variations from Mt. Vulture to Campanian volcanoes: constraints for slab detachment and mantle inflow beneath southern Italy

Astis, G. De; Kempton, Pamela D.; Peccerillo, Angelo; Wu, Tian

doi:10.1007/s00410-006-0062-y

Cited by 86 publications

(65 citation statements)

References 83 publications

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“…Some carbonatites are also present, a unique case for subduction-related environments (Stoppa & Woolley 1997;D'Orazio et al 2007). Therefore, geochemical data suggest equal contributions by both subduction-type and OIB-type components, in agreement with the peculiar geological setting of this volcano (De Astis et al 2006). The causes of partial melting are also still poorly understood.…”

Section: Mount Vulturesupporting

confidence: 69%

“…Mount Vulture (Fig. 4c) shows somewhat intermediate characteristics, being relatively depleted in HFSE, similar to orogenic rocks, but also in Rb and K, as observed in some anorogenic lavas (De Astis et al 2006).…”

Section: Trace Element Geochemistrymentioning

confidence: 83%

“…Vulture (Fig. 3), associated with carbonatites (Stoppa & Woolley 1997;De Astis et al 2006;D'Orazio et al 2007). Finally, lamproitic rocks are restricted to Tuscany (Montecatini, Orciatico, Torre Alfina) with an older outcrop in Corsica (Sisco, 14 Ma), where they form a few small subvolcanic bodies and lava flows, associated with shoshonitic and calc-alkaline lavas, as well as with crustal anatectic magmas ( Fig.…”

Section: Regional Distribution Of Magma Typesmentioning

confidence: 99%

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

Peccerillo

Frezzotti

2015

JGS

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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.

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Section: Mount Vulturesupporting

confidence: 69%

Section: Trace Element Geochemistrymentioning

confidence: 83%

Section: Regional Distribution Of Magma Typesmentioning

confidence: 99%

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

Peccerillo

Frezzotti

2015

JGS

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“…Volcanic activity started at about 742 ± 11 ka and continued, interrupted by long-lasting quiescence periods, up 142 ± 11 ka (Laurenzi et al, 1993;Buettner et al, 2006). The volcanic products have a strongly undersaturated silica character with alkaline potassic to ultrapotassic af- Giannandrea et al, 2004 finities (De Fino et al, 1986) and range in composition from foidites (nephelinites, hauynites, leucitites) and melilitites (plus basanites and tephrites) to phonolitic tephrites, phonolites and trachytes (Melluso et al, 1996;Beccaluva et al, 2002;De Astis et al, 2006). The large Na and S contents of the Vulture magmas (Marini et al, 1994) result in the widespread presence of sodalite-group phases among the feldespathoids (De Fino et al, 1982;Di Muro et al, 2004).…”

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

“…Fig. 4 Fino et al, 1982Fino et al, , 1986Melluso et al, 1996;Bindi et al, 1999;Beccaluva et al, 2002, De Astis et al, 2006 intercalations of pyroclastic products (rich in alkali, feldspathoids, feldspars, pyroxenes, plagioclases etc.). These volcanic deposits are confined by impermeable layers, and could entrap saline groundwaters (Spilotro et al, 2005) derived from the leaching of weathering products of feldspathoids belonging to the sodalite group.…”

Section: +mentioning

confidence: 99%

Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

et al. 2010

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We report the chemical composition of groundwaters-including the first data on the sulfur isotopic composition of dissolved sulfate-from the volcanic aquifers of Mt. Vulture, one of the most important hydrological basins of southern Italy. A total of 27 water samples taken at different altitudes among drilled wells and springs were collected. The majority of groundwaters have a bicarbonate alkaline and bicarbonate alkaline-earth composition. High-salinity waters are sulfatebicarbonate alkaline in composition. The water-rock interaction process is mainly affected from uprising of CO 2 -rich gases which cause an increase of the water acidity promoting basalt weathering with an enrichment in certain chemical species (i.e., Na + , Ca 2+ , SO 4 2-) and a high total carbon content. The δ 34 S values of dissolved sulfate ranging from +4‰ to +8.6‰ can be explained by leaching of volcanites. Higher δ 34 S values (from 9.6‰ to 10.4‰) detected in a few water springs can be ascribed either to the interaction with the pyroclastic layer rich in feldspathoids, such as haüyna, that have sulfur isotopic compositions up to +10.6‰ or animal manure contamination inducing localized bacterial sulfate reduction with an increase in the δ 34 S of sulfate. Taking into account that Upper Triassic evaporite deposits have higher δ 34 S values (from +13.5‰ to +17.4‰,) than those measured in all water samples the dissolution of these deposits could be excluded.

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New insights into crustal structure, Cenozoic magmatism, CO₂ degassing, and seismogenesis in the southern Apennines and Irpinia region from local earthquake tomography

2014

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We present high-resolution Vp and Vp/Vs models of the southern Apennines (Italy) computed using local earthquakes recorded from 2006 to 2011 with a graded inversion scheme that progressively resolves the crustal structure, from the large scale of the Apennines belt to the local scale of the normal fault system. High-Vp bodies defined in the upper crust and midcrust under the external Apennines are interpreted as extensive mafic intrusions revealing anorogenic magmatism episodes that broadened on the Adriatic domain during Paleogene. Under the mountain belt, a low-Vp region, annular to the Neapolitan volcanic district, indicates the existence of a thermal/fluid anomaly in the midcrust, coinciding with a shallow Moho and diffuse degassing of deeply derived CO 2 . In the belt axial zone, low-Vp/Vs gas-pressurized rock volumes under the Apulian carbonates correlate to high heat flow, strong CO 2 -dominated gas emissions of mantle origin, and shallow carbonate reservoirs with pressurized CO 2 gas caps. We hypothesize that the pressurized fluid volumes located at the base of the active fault system influence the rupture process of large normal faulting earthquakes, like the 1980 Mw6.9 Irpinia event, and that major asperities are confined within the high-Vp Apulian carbonates. This study confirms once more that preexisting structures of the Pliocene Apulian belt controlled the rupture propagation during the Irpinia earthquake. The main shock broke a~30 km long, NE dipping seismogenic structure, whereas delayed ruptures (both the 20 s and the 40 s subevents) developed on antithetic faults, reactivating thrust faults located at the eastern edge of the Apulian belt.

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Trace element and isotopic variations from Mt. Vulture to Campanian volcanoes: constraints for slab detachment and mantle inflow beneath southern Italy

Cited by 86 publications

References 83 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

Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

New insights into crustal structure, Cenozoic magmatism, CO₂ degassing, and seismogenesis in the southern Apennines and Irpinia region from local earthquake tomography

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Trace element and isotopic variations from Mt. Vulture to Campanian volcanoes: constraints for slab detachment and mantle inflow beneath southern Italy

Cited by 86 publications

References 83 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

Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

New insights into crustal structure, Cenozoic magmatism, CO2 degassing, and seismogenesis in the southern Apennines and Irpinia region from local earthquake tomography

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New insights into crustal structure, Cenozoic magmatism, CO₂ degassing, and seismogenesis in the southern Apennines and Irpinia region from local earthquake tomography