New chronological and geochemical constraints on the genesis and geological evolution of Ponza and Palmarola Volcanic Islands (Tyrrhenian Sea, Italy)

Cadoux, Anita; Pinti, Daniele L.; Aznar, Cyril; Chiesa, Sergio; Gillot, Pierre‐Yves

doi:10.1016/j.lithos.2004.09.020

Cited by 59 publications

(72 citation statements)

References 37 publications

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“…However, based on major and trace element signatures, processes relating to upper crustal anatexis have been discarded by Conte and Dolfi [] and Cadoux et al . [] in favor of derivation from mantle‐derived melts. Paone [] reconciles chemical and isotopic data by assuming that the Pliocene rhyolites were derived from the partial melting of mafic lower crust.…”

Section: Discussionmentioning

confidence: 99%

“…The islands are rooted on a sedimentary basement affected by Plio‐Pleistocene extensional deformations [ Zitellini et al ., ; Marani et al ., ; Marani and Zitellini , ; De Rita et al ., ; Malinverno and Ryan , ]. These deformations created several morpho‐structural elements, such as (1) a NW‐SE trending escarpment (the Ventotene Escarpment, Figure a); (2) a NE‐SW elongated high (the Ponza‐Zannone structural high, Figures a and b) that is bounded by extensional faults affecting the Plio‐Pleistocene postorogenic cover and divides two major areas of sedimentation (the Palmarola and Ventotene intraslope basins, Figures a and b); and (3) volcanic edifices related to diffuse magmatic activity [ Barberi et al ., ; Cadoux et al ., , and references therein].…”

Section: Study Areamentioning

confidence: 99%

“…Due to the lack of poorly differentiated magmas among the volcanites of the two cycles, different petrogenetic processes have been suggested for their origin, including both crystal fractionation from mantlederived basic magmas [Conte and Dolfi, 2002;Cadoux et al, 2005;Conte et al, 2016] and partial melting at crustal levels (i.e., anatexis [Paone, 2013]). The anatectic processes have been extensively considered for the Pliocene calcalkaline rhyolites, PLIR, due to their Sr-Nd isotope signatures, marking a stronger Journal of Geophysical Research: Solid Earth 10.1002/2016JB013103 involvement of crustal materials with respect to the Pleistocene trachytes PLET.…”

Section: Fluids Versus Plio-pleistocene Magmatic Activitymentioning

confidence: 99%

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Evidence of a shallow water submarine hydrothermal field off Zannone Island from morphological and geochemical characterization: Implications for Tyrrhenian Sea Quaternary volcanism

Martorelli

Italiano²,

Ingrassia

et al. 2016

JGR Solid Earth

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Discoveries from multibeam bathymetry and geochemical surveys performed off Zannone Island (western Pontine Archipelago, Tyrrhenian Sea) provide evidence of an undocumented hydrothermal field characterized by ongoing fluid emissions and morphologically complex giant depressions located in shallow water (<150 m water depth). Based on a detailed morpho‐bathymetric study we identify the seabed morphologies produced by hydrothermal fluid emission activity. We recognize five giant depressions (length >250 m) that host pockmarks, mounds, small cones, and active fluid vents, which are interpreted as complex fluid‐escape features developed both through vigorous‐explosive events and steady seepage. Their spatial distribution suggests that the NE‐SW trending faults bounding the Ponza‐Zannone structural high and the shallow fractured basement are favorable conditions for the upward migration of hydrothermal fluids. Moreover, we performed a detailed geochemical study to investigate the source of the hydrothermal fluids. The geochemical signature of the collected fluids provides information of active CO2‐dominated degassing with a significant contribution of mantle volatiles, with measured 3He/4He values > 3.0 Ra that are similar to those recorded at Stromboli and Panarea volcanoes. The hydrothermal system produces volatiles that may originate from residual magma batches, similar to the Pleistocene trachytes cropping out in the SE sector of Ponza Island that were probably intruded in the shallow crustal levels and never erupted. The discovery of the Zannone hydrothermal field updates the record of active hydrothermal areas of the Mediterranean Sea. Moreover, the recognition of several giant hydrothermal depressions characterized by a complex morphology is peculiar for the Mediterranean Sea.

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Section: Discussionmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Fluids Versus Plio-pleistocene Magmatic Activitymentioning

confidence: 99%

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Evidence of a shallow water submarine hydrothermal field off Zannone Island from morphological and geochemical characterization: Implications for Tyrrhenian Sea Quaternary volcanism

Martorelli

Italiano²,

Ingrassia

et al. 2016

JGR Solid Earth

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“…9.1 inset) and is formed by two groups of volcanic islands: the western group Palmarola, Ponza and Zannone Islands and the eastern group Santo Stefano and Ventotene Islands. These islands were formed during two main volcanisms phases, dated 4.2-2.9 Ma and 1.6-0.9 Ma (Cadoux et al 2005). In detail, the western group is located on a structural high developed during Plio-Pleistocene and separating the Palmarola and Ventotene basins (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

Submarine Mass Movements and their Consequences

2016

Advances in Natural and Technological Hazards Research

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“…Two-pyroxenes high-K calc-alkaline rocks are strongly differentiated products at Cimino, Tolfa, Manziana, and Ponza volcanic centres. They are associated with either younger mafic lamproite-like shoshonitic rocks or with lamproite-like mafic enclaves (Clausen & Holm, 1990;Pinarelli, 1991;Perini et al, 2003;Conte & Dolfi, 2002;Paone, 2004;Cadoux et al, 2005). Equilibrium between clinopyroxene and orthopyroxene is the main petrographic characteristic of the most differentiated terms, which are associated with biotite, sanidine, plagioclase, apatite, zircon, ilmenite, Ti-magnetite.…”

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confidence: 99%