Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera
Campi Flegrei is an active, resurgent caldera that is located a few kilometres west of the city of Naples, a densely populated urban settlement in southern Italy. Identifying, locating at depth and better defining the geometry of the magma feeding system of the caldera is highly relevant for assessi...
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| Format: | Article |
| Language: | English |
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Wiley
2008-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2008GL034242 |
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| author | Aldo Zollo Nils Maercklin Maurizio Vassallo Dario Dello Iacono Jean Virieux Paolo Gasparini |
| author_facet | Aldo Zollo Nils Maercklin Maurizio Vassallo Dario Dello Iacono Jean Virieux Paolo Gasparini |
| author_sort | Aldo Zollo |
| collection | DOAJ |
| description | Campi Flegrei is an active, resurgent caldera that is located a few kilometres west of the city of Naples, a densely populated urban settlement in southern Italy. Identifying, locating at depth and better defining the geometry of the magma feeding system of the caldera is highly relevant for assessing and monitoring its volcanic hazard. Based on a high resolution seismic reflection data set, we investigated the deep structure of the volcano. Here we show that seismic wave amplitude variations with distance from the radiating source provide clear evidence for large amplitude seismic reflections from the top of an extended supercritical fluid‐bearing rock formation at about 3,000 m and of an about 7,500 m deep, 1,000 m thick, low velocity layer, which is associated with a mid‐crust, partial melting zone beneath the caldera. The modeling of magma properties based on measured seismic velocities indicates a relatively high melt percentage (in the range 80–90%). These new data suggest that a large magmatic sill is present well within the basement formations, which is possibly linked to the surface through a system of deep fractures bordering the caldera. The lateral extension and similar depth of the melt zone observed beneath the nearby Mt.Vesuvius support the hypothesis of a single continuous magma reservoir feeding both of these volcanoes. |
| format | Article |
| id | doaj-art-5da135f6632a48f58cc862bb7aa05856 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2008-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-5da135f6632a48f58cc862bb7aa058562025-08-20T01:52:19ZengWileyGeophysical Research Letters0094-82761944-80072008-06-013512n/an/a10.1029/2008GL034242Seismic reflections reveal a massive melt layer feeding Campi Flegrei calderaAldo Zollo0Nils Maercklin1Maurizio Vassallo2Dario Dello Iacono3Jean Virieux4Paolo Gasparini5RISSC‐Lab, Department of Physics Università di Napoli “Federico II” Naples ItalyRISSC‐Lab, Department of Physics Università di Napoli “Federico II” Naples ItalyRISSC‐Lab, Department of Physics Università di Napoli “Federico II” Naples ItalyRISSC‐Lab, Department of Physics Università di Napoli “Federico II” Naples ItalyLaboratoire de Géophysique Interne et Tectonophysique Université Joseph Fourier Grenoble FranceRISSC‐Lab, Department of Physics Università di Napoli “Federico II” Naples ItalyCampi Flegrei is an active, resurgent caldera that is located a few kilometres west of the city of Naples, a densely populated urban settlement in southern Italy. Identifying, locating at depth and better defining the geometry of the magma feeding system of the caldera is highly relevant for assessing and monitoring its volcanic hazard. Based on a high resolution seismic reflection data set, we investigated the deep structure of the volcano. Here we show that seismic wave amplitude variations with distance from the radiating source provide clear evidence for large amplitude seismic reflections from the top of an extended supercritical fluid‐bearing rock formation at about 3,000 m and of an about 7,500 m deep, 1,000 m thick, low velocity layer, which is associated with a mid‐crust, partial melting zone beneath the caldera. The modeling of magma properties based on measured seismic velocities indicates a relatively high melt percentage (in the range 80–90%). These new data suggest that a large magmatic sill is present well within the basement formations, which is possibly linked to the surface through a system of deep fractures bordering the caldera. The lateral extension and similar depth of the melt zone observed beneath the nearby Mt.Vesuvius support the hypothesis of a single continuous magma reservoir feeding both of these volcanoes.https://doi.org/10.1029/2008GL034242calderamagma sillseismic reflections |
| spellingShingle | Aldo Zollo Nils Maercklin Maurizio Vassallo Dario Dello Iacono Jean Virieux Paolo Gasparini Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera Geophysical Research Letters caldera magma sill seismic reflections |
| title | Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera |
| title_full | Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera |
| title_fullStr | Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera |
| title_full_unstemmed | Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera |
| title_short | Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera |
| title_sort | seismic reflections reveal a massive melt layer feeding campi flegrei caldera |
| topic | caldera magma sill seismic reflections |
| url | https://doi.org/10.1029/2008GL034242 |
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