Lamprophyres of Italy: early Cretaceous alkaline lamprophyres of Southern Tuscany, Italy

Stoppa, Francesco; Rukhlov, Alexei S.; Bell, Keith; Schiazza, Mariangela; Vichi, G.

doi:10.1016/j.lithos.2013.10.010

Cited by 47 publications

(34 citation statements)

References 32 publications

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“…The Albian (Stoppa et al, ) alkaline lamprophyric dykes, sills, and subordinate pillow lavas sparsely cropping out in southern Tuscany (STAL) are hosted in the Sub‐Ligurian succession made of pelagic cherty micrites interbedded in siliciclastic turbidites. Their geochemical signature is again of clearly anorogenic type, displaying a strongly incompatible elements‐enriched character, which is even more marked with respect to that shown by the alkali‐richest VVP igneous rocks.…”

Section: Discussionmentioning

confidence: 99%

“…Upper Cretaceous–Eocene anorogenic igneous rocks crop out from Sicilian Maghrebides (Hyblean–Sicilide domain) to Apennines and Apulian foreland, up to the southern Alps (Veneto area; Bellia et al, ; Bigazzi et al, ; Di Girolamo et al, , ; Grasso et al, ; Groppelli & Pasquarè, ; Lucido et al, ; Macera, Gasperini, Ranalli, & Mahatsente, ; Macera et al, ; Pierattini, Scandone, & Cortini, Beccaluva et al, ; Bianchini et al, ; Avanzinelli et al, ; Stoppa et al, ). Apart from the large (~1500 km 2 ) Veneto Volcanic Province area (VVP in Figure A) and the Capo Passero–Pachino area (CP in Figure a; up to 4,000 km 2 considering data from wells drilled in SE Sicily (Longaretti & Rocchi, ; ViDEPI, ), exposures of igneous rocks in the Adria domain are extremely localized (Figure a) and appear as scattered of dykes, sills, pillow lavas, and lava flows.…”

Section: Geological Settingmentioning

confidence: 99%

“…Upper Cretaceous-Eocene anorogenic igneous rocks crop out from Sicilian Maghrebides (Hyblean-Sicilide domain) to Apennines and Apulian foreland, up to the southern Alps (Veneto area; Bellia et al, 1981;Bigazzi et al, 1996;Di Girolamo et al, 1992Grasso et al, 1991;Groppelli & Pasquarè, 2004;Lucido et al, 1978;Macera, Gasperini, Ranalli, & Mahatsente, 2008;Macera et al, 2003;Pierattini, Scandone, & Cortini, 1975Beccaluva et al, 2007Bianchini et al, 2008;Avanzinelli et al, 2012;Stoppa et al, 2014). Apart from the large (~1500 km 2 ) Veneto Volcanic Province area (VVP in Figure 1A) and…”

Section: Upper Cretaceous-eocene Igneous Rocks From the Adria-hyblementioning

confidence: 99%

“…During the Late Cretaceous-Eocene period, scattered manifestations of an anorogenic magmatism affected the Apennine-Apulian margin basin, the Sicilian Maghrebian platform basin, the Ligurian successions, and the Sicilian foreland (Lucido, Nuccio, Valenza, & Giunta, 1978;Bellia, Lucido, Nuccio, & Valenza, 1981;Di Girolamo, Morra, & Perrone, 1992;Di Girolamo, Morra, & Galdi, 1994;Bigazzi, Laurenzi, Principe, & Brocchini, 1996;Grasso, Pezzino, Reuther, Lanza, & Miletto, 1991;Groppelli & Pasquarè, 2004;Beccaluva et al, 2007;Bianchini, Beccaluva, & Siena, 2008;Avanzinelli, Sapienza, & Conticelli, 2012;Stoppa, Rukhlov, Bell, Schiazza, & Vichi, 2014). In addition, deformation structures related with an Albian-Late Cretaceous extension episode were described in the Apulian domain (e.g., Chilovi, De Feyter, & Pompucci, 2000;Festa, 2003;Korneva et al, 2014;Masse & Borgomano, 1987;and references therein) and in the southern (Carannante et al, 2009;Tavani et al, 2013) and central Apennines (Bigi & Costa Pisani, 2005;Capotorti, Fumanti, & Mariotti, 1997;Tavani, Vignaroli, & Parente, 2015).…”

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confidence: 99%

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Structural, stratigraphic, and petrological clues for a Cretaceous–Paleogene abortive rift in the southern Adria domain (southern Apennines, Italy)

et al. 2017

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This study provides new structural, stratigraphic, and geochemical data and a literature review of the Cretaceous–Paleogene stratigraphy, biostratigraphy, tectonics, and magmatism in the southern Apennines belt, Italy, with the aim to demonstrate the occurrence of an Albian to Eocene abortive rifting stage in the southern Adria domain. During this time, the tectono‐stratigraphic evolution of the Adria domain is characterized by episodes of coeval uplift and drowning. Different sectors of the Apennine and Apulian platforms were so characterized by changes in the paleoenvironments, leading to different stratigraphic records (from shallow‐water to slope and basin), as well as the development of thick bauxitic levels. Contemporaneously, a large amount of calciclastic sediments supply from the emerging sectors was deposited in the basins surrounding the carbonate platforms (i.e., Ligurian and Lagonegro–Molise basins). The Albian–Eocene interval was also characterized by the occurrence of anorogenic magmatism and synsedimentary extensional faulting that, along with the changed sedimentary facies distribution, points out for a crustal‐scale extensional tectonics. We suggest that such tectonics is the result of a rifting episode, characterized by limited anorogenic magmatism, starting in the Albian and reaching its climax in the uppermost Cretaceous–Eocene times. In this scenario, the extensional tectonics recorded in the Adria domain was the product during an event of a single abortive rift system, which extended toward the south, from the southern margin of the Ligurian Ocean to the Hyblean (Sicily), Pelagian (Tunisia), and Sirte Basin Province Rift (Libya).

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Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Upper Cretaceous-eocene Igneous Rocks From the Adria-hyblementioning

confidence: 99%

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confidence: 99%

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Structural, stratigraphic, and petrological clues for a Cretaceous–Paleogene abortive rift in the southern Adria domain (southern Apennines, Italy)

et al. 2017

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“…(Early Cretaceous) and also cropping out a few km south of the Mt. Amiata volcano (Senna creek valley) as well as in several other localities of southern Tuscany (Passerini, 1964;Brunacci et al, 1983;Faraone and Stoppa, 1990;Brogi et al, 2000;Stoppa et al, 2014). d) The Pre-Neogene substratum of Mt.…”

Section: Introductionmentioning

confidence: 99%

Comment on: “Borgia, A., Mazzoldi, A., Brunori, C.A., Allocca, C., Delcroix, C., Micheli, L., Vercellino, A., Grieco, G., 2014. Volcanic spreading forcing and feedback in geothermal reservoir development, Amiata Volcano, Italia. J. Volc. Geoth. Res. 284, 16–31”

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Brogi

et al. 2015

Journal of Volcanology and Geothermal Research

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La Queglia carbonatitic melnöite: a notable example of an ultra-alkaline rock variant in Italy

et al. 2022

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Very primitive ultramafic igneous rocks occur at Mt. La Queglia (Abruzzo, Italy). They form a strongly deformed sill–dyke system now tilted vertically. These rocks were initially classified as alnöite and, subsequently, have been suggested to be a carbonatitic olivine melilitite. However, further investigation and interpretation of these rocks is needed due to the presence of hand-specimen-scale textural variation suggesting a complex petrogenesis. We study the texture, mineral chemistry, and whole-rock geochemistry to define three main rock-types. (1) A brecciated rock with an ocellar texture composed of calcite pseudomorphs after olivine and melilite, plus fresh diopside in a groundmass of mica, aegirine, garnet, calcite, apatite, perovskite, titanate and chlorite. Zoned ocelli in this rock show an amoeboid shape, agglutination, and menisci typical of a plastic state. (2) A quenched rock showing a spinifex texture containing long feathery phenocrysts of cpx and mica suspended in a groundmass of nepheline, aegirine, apatite, Ti–rich magnetite, plus abundant calcite and some K-feldspar and zeolites. (3) A coarse-grained rock is composed of calcite plus intergranular glauconite, a mixture of spinel mineral group and Ti–rich magnetite, accessory barite, pyrite, and chabazite-K. The igneous rocks at Mt. La Queglia show extreme SiO2-undersaturation (33.5–37.3 wt% SiO2), high MgO contents and TiO2/Al2O3 ratios. Rock-type 1 has a lower Mg number Mg# = 100 × [Mg/(Mg + Fe2+)], higher Ca number Ca# = 100 × [Ca/(Ca + Mg)], high Cr (up to 720 ppm) Ni (up to 379 ppm), higher rare earth elements (REE) contents as well as La/Lu ratio, compared to rock-type 2. Perovskite and chromite accumulation seems an important agent during rock differentiation. Rock-type 3 shows REE cross-over with rock-type 2 suggesting light (L)REE concentration in a carbothermal residuum. Mt. La Queglia rocks are an end-member compared to other Upper Cretaceous and Paleogene Italian lamprophyres, suggesting a low degree of melting of a HIMU (a colloquialism for “high-μ”; referring to mantle domains with high 238U/ 204Pb) garnet-bearing mantle source.

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Lamprophyres of Italy: early Cretaceous alkaline lamprophyres of Southern Tuscany, Italy

Cited by 47 publications

References 32 publications

Structural, stratigraphic, and petrological clues for a Cretaceous–Paleogene abortive rift in the southern Adria domain (southern Apennines, Italy)

Structural, stratigraphic, and petrological clues for a Cretaceous–Paleogene abortive rift in the southern Adria domain (southern Apennines, Italy)

Comment on: “Borgia, A., Mazzoldi, A., Brunori, C.A., Allocca, C., Delcroix, C., Micheli, L., Vercellino, A., Grieco, G., 2014. Volcanic spreading forcing and feedback in geothermal reservoir development, Amiata Volcano, Italia. J. Volc. Geoth. Res. 284, 16–31”

La Queglia carbonatitic melnöite: a notable example of an ultra-alkaline rock variant in Italy

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