%0 Journal Article %1 zollo_etal:2008 %A Zollo, Aldo %A Maercklin, Nils %A Vassallo, Maurizio %A Dello Iacono, Dario %A Virieux, Jean %A Gasparini, Paolo %D 2008 %J Geophysical Research Letters %K geophysics myown seismics %N 12 %P L12306+ %R 10.1029/2008GL034242 %T Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera %U http://dx.doi.org/10.1029/2008GL034242 %V 35 %X 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 dataset, 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 gas- and/or brine-bearing rock formation at about 3000 m and of an about 7500 m deep, 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.

@article{zollo_etal:2008, abstract = {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 dataset, 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 gas- and/or brine-bearing rock formation at about 3000 m and of an about 7500 m deep, 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.}, added-at = {2012-09-01T13:08:21.000+0200}, author = {Zollo, Aldo and Maercklin, Nils and Vassallo, Maurizio and Dello Iacono, Dario and Virieux, Jean and Gasparini, Paolo}, biburl = {https://www.bibsonomy.org/bibtex/2e5eaf697c39a6afed2a4a2da101d462a/nilsma}, day = 21, doi = {10.1029/2008GL034242}, interhash = {c0b329afc478781a58a2925afb4e0e07}, intrahash = {e5eaf697c39a6afed2a4a2da101d462a}, issn = {0094-8276}, journal = {Geophysical Research Letters}, keywords = {geophysics myown seismics}, month = jun, number = 12, pages = {L12306+}, timestamp = {2021-02-09T13:27:42.000+0100}, title = {Seismic reflections reveal a massive melt layer feeding Campi Flegrei caldera}, url = {http://dx.doi.org/10.1029/2008GL034242}, volume = 35, year = 2008 }