“…In contrast to the widely accepted subduction-related models, a sharply different geodynamic scenario, i.e. a relationship with continental extension and/or upwelling mantle plume, has also been suggested to explain the evolution of the Central Mediterranean (Vollmer 1989;Lavecchia & Stoppa 1996;Ayuso et al 1998;Lavecchia et al 2003;Bell et al 2004). Lavecchia et al (2003) argued that the deformation style of the central Apennine fold-and-thrust belt, the absence of an accretionary wedge above the assumed subduction plane and the occurrence of ultra-alkaline and carbonatitic magmas within the Apennine mountain chain are evidence against the classic subduction-related models.…”
Section: Cenozoic Subduction Zones In the Alpine-mediterranean Regionmentioning
confidence: 99%
“…a relationship with continental extension and/or upwelling mantle plume, has also been suggested to explain the evolution of the Central Mediterranean (Vollmer 1989;Lavecchia & Stoppa 1996;Ayuso et al 1998;Lavecchia et al 2003;Bell et al 2004). Lavecchia et al (2003) argued that the deformation style of the central Apennine fold-and-thrust belt, the absence of an accretionary wedge above the assumed subduction plane and the occurrence of ultra-alkaline and carbonatitic magmas within the Apennine mountain chain are evidence against the classic subduction-related models. They proposed that plume-induced lithospheric stretching and local-scale rift push-induced crustal shortening form a viable alternative model for the evolution of the Central Mediterranean region (Lavecchia et al 2003;Bell et al 2004).…”
Section: Cenozoic Subduction Zones In the Alpine-mediterranean Regionmentioning
confidence: 99%
“…In contrast to the most popular subduction-related models, the presence of a mantle plume and related continental rifting was put forward by Lavecchia et al (2003) and Bell et al (2004). Gasperini et al (2002) also invoked upwelling of deep mantle material beneath southern Italy, but they combined it with the subduction scenario, suggesting a broad window in the Adria plate where deep mantle layers are channelled toward the surface.…”
Section: Central Mediterranean (Italy)mentioning
confidence: 99%
“…In their model, the high velocity body above the 670 km depth (Piromallo et al 2001) was interpreted as reflection of compositional difference rather then abrupt change in the mantle temperature. Lavecchia et al (2003) suggested that the fast zones in the transition zone could be a highly depleted and dehydrated plume head, whereas the overlying asthenosphere was enriched by H 2 O-CO 2 rich fluids. However, Goes et al (2000) proposed that the velocity variation in the mantle could be attributed mostly to changes in temperature, while the effect of mantle composition could be negligible (<1%).…”
Section: Central Mediterranean (Italy)mentioning
confidence: 99%
“…Gasperini et al (2002) also invoked upwelling of deep mantle material beneath southern Italy, but they combined it with the subduction scenario, suggesting a broad window in the Adria plate where deep mantle layers are channelled toward the surface. Lavecchia et al (2003) and Bell et al (2004) proposed that a plume arising from the core-mantle boundary could be trapped within the transition zone beneath the Ligurian-Tyrrhenian region. Asymmetric growth of the plume head within the transition zone as modelled by Brunet & Yuen (2000) could lead to a volume excess within the asthenosphere and an eastward mantle flow.…”
“…In contrast to the widely accepted subduction-related models, a sharply different geodynamic scenario, i.e. a relationship with continental extension and/or upwelling mantle plume, has also been suggested to explain the evolution of the Central Mediterranean (Vollmer 1989;Lavecchia & Stoppa 1996;Ayuso et al 1998;Lavecchia et al 2003;Bell et al 2004). Lavecchia et al (2003) argued that the deformation style of the central Apennine fold-and-thrust belt, the absence of an accretionary wedge above the assumed subduction plane and the occurrence of ultra-alkaline and carbonatitic magmas within the Apennine mountain chain are evidence against the classic subduction-related models.…”
Section: Cenozoic Subduction Zones In the Alpine-mediterranean Regionmentioning
confidence: 99%
“…a relationship with continental extension and/or upwelling mantle plume, has also been suggested to explain the evolution of the Central Mediterranean (Vollmer 1989;Lavecchia & Stoppa 1996;Ayuso et al 1998;Lavecchia et al 2003;Bell et al 2004). Lavecchia et al (2003) argued that the deformation style of the central Apennine fold-and-thrust belt, the absence of an accretionary wedge above the assumed subduction plane and the occurrence of ultra-alkaline and carbonatitic magmas within the Apennine mountain chain are evidence against the classic subduction-related models. They proposed that plume-induced lithospheric stretching and local-scale rift push-induced crustal shortening form a viable alternative model for the evolution of the Central Mediterranean region (Lavecchia et al 2003;Bell et al 2004).…”
Section: Cenozoic Subduction Zones In the Alpine-mediterranean Regionmentioning
confidence: 99%
“…In contrast to the most popular subduction-related models, the presence of a mantle plume and related continental rifting was put forward by Lavecchia et al (2003) and Bell et al (2004). Gasperini et al (2002) also invoked upwelling of deep mantle material beneath southern Italy, but they combined it with the subduction scenario, suggesting a broad window in the Adria plate where deep mantle layers are channelled toward the surface.…”
Section: Central Mediterranean (Italy)mentioning
confidence: 99%
“…In their model, the high velocity body above the 670 km depth (Piromallo et al 2001) was interpreted as reflection of compositional difference rather then abrupt change in the mantle temperature. Lavecchia et al (2003) suggested that the fast zones in the transition zone could be a highly depleted and dehydrated plume head, whereas the overlying asthenosphere was enriched by H 2 O-CO 2 rich fluids. However, Goes et al (2000) proposed that the velocity variation in the mantle could be attributed mostly to changes in temperature, while the effect of mantle composition could be negligible (<1%).…”
Section: Central Mediterranean (Italy)mentioning
confidence: 99%
“…Gasperini et al (2002) also invoked upwelling of deep mantle material beneath southern Italy, but they combined it with the subduction scenario, suggesting a broad window in the Adria plate where deep mantle layers are channelled toward the surface. Lavecchia et al (2003) and Bell et al (2004) proposed that a plume arising from the core-mantle boundary could be trapped within the transition zone beneath the Ligurian-Tyrrhenian region. Asymmetric growth of the plume head within the transition zone as modelled by Brunet & Yuen (2000) could lead to a volume excess within the asthenosphere and an eastward mantle flow.…”
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