Geodynamic implications of deep mantle upwelling in the source of Tertiary volcanics from the Veneto region (South-Eastern Alps)

Macera, Patrizia; Gasperini, Daniela; Piromallo, Claudia; Blichert‐Toft, Janne; Bosch, Delphine; Moro, A. Del; Martin, Silvana

doi:10.1016/j.jog.2003.08.004

Cited by 57 publications

(52 citation statements)

References 56 publications

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“…Their patterns are actually similar to those of the VVP host basanites, which have a typical OIB signature, in spite of the lack of Rb negative anomalies in most of the samples (Fig. 4c, Table 3; Macera et al, 2003). Other xenoliths display similar geochemical characteristics, also if relatively less enriched in incompatible elements, and not all showing K troughs, even if they do not display optical evidence of interaction with the host basanites;…”

Section: Trace Element Compositionmentioning

confidence: 53%

“…Some VVP xenoliths with low Nd and Sr isotope ratios plot close to Canary Islands (Whitehouse and Neumann, 1995), within the field of VVP basalts (insert in Fig. 7a; data from Macera et al, 2003). There are no similarities between xenoliths from the VVP and Japan, Philippines and the Kerguelen Islands.…”

Section: Isotopic Compositionmentioning

confidence: 61%

“…These features are akin to those of altered oceanic crust and its pelagic sediment veneer (Eliott et al, 1997). The geodynamic scenario proposed by Macera et al (2003Macera et al ( , 2004 and Ranalli et al (2004) may explain the occurrence of both OIB-HIMU-type and subduction-related metasomatism in the VVP mantle lithosphere. According to this model, since the Cretaceous a mantle plume with OIB-HIMU geochemical signature was situated in the upper mantle, above the transition zone.…”

Section: Discussionmentioning

confidence: 89%

“…7e). (French Massif Central: Downes and Dupuy, 1987;Zangana et al, 1997;Downes et al, 2003;Germany-Hessian Depression: Kramm and Wedepohl, 1990;Hungary and Romania: Downes et al, 1992;Vaselli et al, 1995;Rosenbaum et al, 1997;Vulture: Downes et al, 2002;Australia: McDonough and McCulloch, 1987;Griffin et al, 1988;China: Song and Frey, 1989;Tatsumoto et al, 1992;Canary Islands: Whitehouse and Neumann, 1995;Kerguelen Islands: Mattielli et al, 1996;Philippines: Vidal et al, 1989;Maury et al, 1992;Japan: Ikeda et al, 2001 (Whitehouse and Neumann, 1995;Mattielli et al, 1996), Hungary and Romania (Rosenbaum et al, 1997), China (Tatsumoto et al, 1992) and Canada (Yukon;Carignan et al, 1996) Macera et al, 2003. Symbols are the same as in Fig.…”

Section: Isotopic Compositionmentioning

confidence: 99%

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Ultramafic xenoliths from the Veneto Volcanic Province (Italy): Petrological and geochemical evidence for multiple metasomatism of the SE Alps mantle lithosphere

et al. 2006

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Petrologic and geochemical characteristics of whole rocks and minerals may be explained by metasomatism of the local mantle lithosphere induced by both alkaline magmas upwelling to the surface (OIB-like mantle diapirism) and interaction with slab-derived material. In comparison with the geochemistry of xenoliths carried by alkaline magmas in typical withinplate tectonic environments, the Veneto xenoliths record a major heterogeneity of the local lithosphere. This appears to be related to a geodynamic scenario that was previously dominated by active continental collision, in which plume-like magmatism subsequently manifested itself.

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Section: Trace Element Compositionmentioning

confidence: 53%

Section: Isotopic Compositionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 89%

Section: Isotopic Compositionmentioning

confidence: 99%

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Ultramafic xenoliths from the Veneto Volcanic Province (Italy): Petrological and geochemical evidence for multiple metasomatism of the SE Alps mantle lithosphere

et al. 2006

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“…In addition, extensive Paleocene-early Oligocene volcanism of primarily basaltic composition occurred in the Veneto foreland region of south-eastern Alps (e.g. Macera et al, 2003). The Oligocene-early Miocene Western Mediterranean extensional phase was characterized by prevalent calc-alkaline magmatic activity mainly developed between ~38 and 15 Ma, with the peak of activity taking place between ~22 and 18 Ma.…”

Section: Introductionmentioning

confidence: 99%

Magmatectonic Zonation of Italy: A Tool to Understanding Mediterranean Geodynamics

Lavecchia¹,

Bell²

2012

Updates in Volcanology - A Comprehensive Approach to Volcanological Problems

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Hints on the deformation penetration induced by subductions and collision processes: Seismic anisotropy beneath the Adria region (Central Mediterranean)

2013

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[1] Adria is a small region surrounded by three mountain belts: the Alps, the Apennines, and the Dinarides, built up by long evolution of subduction and collisional systems. We present 253 shear wave splitting measurements obtained by studying more than 100 teleseismic events for 12 stations. SKS splitting measurements show 3-D complexity and quite strong upper mantle deformation. We carefully analyzed results in terms of back azimuthal coverage and interpret measurements as related to Adria rotation and to subductions evolution. In the northern part of Adria, the anisotropy pattern follows the arcuate shape of the Alps; the same pattern, parallel to the mountains, occurs along the Apennines, but fast directions show a sudden change in the Adria foreland. This lateral variation has been analyzed to isolate a distinct Adria mantle anisotropic pattern, which is identified as NE-SW fast direction along the western microplate boundary and as N-S fast direction at Trieste. This pattern might be induced by drag effect of the counterclockwise rotation of Adria lithosphere that behaves as an independent microplate as identified by GPS data. Our measurements suggest that the geodynamic process that generated the Alps is more efficient deforming a larger volume of mantle than its Apennine counterpart. Moreover, the mantle circulation we hypothesize looking at the regional-scale patterns of anisotropy requires the existence of an escape route beneath the Alps-Apennines transition, through which the mantle flows and feed circulation in the Tyrrhenian mantle system as suggested by previous geodynamic models and as seen by some tomographic studies.

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Geodynamic implications of deep mantle upwelling in the source of Tertiary volcanics from the Veneto region (South-Eastern Alps)

Cited by 57 publications

References 56 publications

Ultramafic xenoliths from the Veneto Volcanic Province (Italy): Petrological and geochemical evidence for multiple metasomatism of the SE Alps mantle lithosphere

Ultramafic xenoliths from the Veneto Volcanic Province (Italy): Petrological and geochemical evidence for multiple metasomatism of the SE Alps mantle lithosphere

Magmatectonic Zonation of Italy: A Tool to Understanding Mediterranean Geodynamics

Hints on the deformation penetration induced by subductions and collision processes: Seismic anisotropy beneath the Adria region (Central Mediterranean)

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