@article {5397, title = {New geological, geophysical and biological insights on the hydrothermal system of the Panarea {\textendash} Basiluzzo Volcanic complex (Aeolian Islands, Tyrrhenian Sea)}, year = {2014}, month = {10-12 Sept 2014}, address = {Milan, Italy}, abstract = {

Since the exhalative crisis of 2002 cruises were carried out to investigate morphology, magnetic and gravity fields, fluid escape, plume anomalies, biological and microbiological activity, benthic fluxes, early diagenesis, mineralogy and geochemistry of water and sediments of the hydrothermal system of Panarea. The volcanic complex was mapped by multibeam, including backscatter analysis, and magnetometric surveys were done to detect low magnetization in areas with hydrothermal activity, i.e., vents, sulphide deposits, chimney fields. CTD by ship and on ROV detected acidic plumes at bottom (minimum pH value 6.5) and mid depths. An Automatic Benthic Chamber was deployed on a terrace (40m) and in depressions with gas-charged and hydrothermally altered sediments (80m). At the 40m site, strong releases of Dissolved Inorganic Carbon (DIC) and Fe, Mn, Zn (75.7, 2.0, 2.9, 3.4 \µmol m -2\  day -1 ) were found. Average decrease of pH in the chamber was ~4 units day -1 with a H + benthic flux of 0.32 \µmol m -2 day -1 ). DIC values of seawater had average 2.3, increasing to 3.1 on degassing vents, while 7.5 \µmol was measured on top of a bubbling core.

ROV dives explored and sampled several sites; active chimneys (black, red crusts and yellowish-orange precipitates at top) were recovered on the SE flanks of Basiluzzo; pH value of 5 was measured aboard on sediments. XRD and XRF data on the external crust showed Fe-Mn oxyhydroxides, including goethite and opal, with Co, Ce, Sr, Zn and Cu enrichments, whereas the inner part are depleted of Fe, Mn and other metals, mostly under detection limits. SEM imagery shows porous filamentous minerals, that are probably bacterial in origin. Dives to SW discovered fields of partially or totally relict chimneys at the same depth (~200m). Chimneys are present on the edges of slope failures and settled on areas of relative lower positive magnetic anomaly, indicating possible shallow depth level of hydrothermal alteration. Reddish crusts and sediments, and acid, gas boiling water (pH 5.5) were cored at 90 m depth upslope of the \&$\#$39;active\&$\#$39; chimneys; upslope from the \&$\#$39;relict\&$\#$39; chimney\&$\#$39;s fields, oxized-normal sediments were found. Biological investigations on the sediments revealed a community strongly dominated by the amphipod Ampelisca ledoyeri (43.8 \% of the total abundance), probably dwelling in the tube-patches. Rare species were detected on the chimney\&$\#$39;s samples. The phylogenetic diversity of microbial communities in the precipitates collected on chimneys and on Bottaro vent was analyzed by bacterial and archaeal 16S rDNA clone libraries, showing a dominance of sulfur-oxidazing epsilon and gamma proteobacteria. Very interesting groups of archaea were revealed including methanotrophic Thermoplasmatales and members of SM1 candidate division. Overall prokaryotic diversity was found similar to that of deep sea hydrothermal vents and other sulfidic habitats. White microbial mats were found in an area S of Panarea, on a N-S oriented fracture.

}, url = {http://www.geoscienze2014.it/index.php/sessioni/elenco-abtsracts}, author = {Bortoluzzi, G. and Spagnoli, F. and Aliani, S. and Romeo, T. and Canese, S. and Esposito, V. and Grassi, M. and Giuseppe Masetti and Dialti, L. and Cocchi, L. and Muccini, F. and Lacono, V. and Yakimov, M. and La Spada, G. and Ligi, M. and Giordano, P. and Franchi, F. and Ferrante, V. and Borgognoni, L. and Tudino, T. and Guideri, M. and Ivaldi, R. and Pratellesi, M. and Marziani, F. and Niccolini, F. and Barbieri, E. and Capaccioni, B. and Andaloro, F.} } @proceedings {5263, title = {Caratterizzazione dell{\textquoteright}ambiente marino dei Campi Flegrei. Risultati preliminari della campagna oceanografica RICAMAR 2013}, year = {2013}, month = {November 5 - 7}, publisher = {Atti 17a Conferenza Nazionale ASITA}, address = {Riva del Garda, Italy}, abstract = {

The caldera of the Phlegraean Fields (also known as Campi Flegrei) is one of the most dangerous and populated volcanic area in the world, covering an area that comprises the western part of Naples and the Gulf of Pozzuoli. The main peculiarity of current volcanic activity is the gradual and periodic lift (positive or negative) of part of the Earth\&$\#$39;s surface (bradyseism) combined, only during the positive phase, with a strong sismicity and surficial hydrotermal activity. Deformative models, calibrated using land-based measurements, highlighted the Gulf of Pozzuoli as the area with the largest deformation.

Although the network of monitoring sensors on land is well developed and structured, there is a lack of sensing systems for the marine deformation. The activities of \"RIlievi per la Caratterizzazione dell\’Ambiente MARino nel Golfo di Pozzuoli 2013 (RICAMAR2013)\" project - sinergically conducted by the Italian Navy\&$\#$39;s Survey Vessel \"Ammiraglio Magnaghi\", the Italian Hydrographic Office (IIM) and the Istituto Nazionale di Geofisica e Vulcanologia (INGV)- were targeted to fulfill this gap. In fact, the creation of marine observatories about the caldera\&$\#$39;s phenomena will be based on the data collected during these bathymetric, magnetometric, stratigrafic and hydrologic surveys.

}, keywords = {bradyseism, caldera, marine deformation}, url = {http://atti.asita.it/ASITA2013/titoli.html}, author = {Grassi, M. and Carmisciano, C. and Cocchi, L. and Dialti, L. and Filippone, M. and Guideri, M. and Ivaldi, R. and Giuseppe Masetti and Muccini, F. and Pratellesi, M. and Ricci, E. and Stefanelli, P.} } @article {5264, title = {RICAMAR2013: Rilievi per la caratterizzazione dell{\textquoteright}ambiente marino nel Golfo di Pozzuoli. Rapporto sull{\textquoteright}attivit{\`a}. 13 - 31 maggio 2013}, year = {2013}, pages = {56, vol. 262(2013)}, institution = {Rapporti Tecnici INGV (ISSN 2039-7941)}, chapter = {Istituto Nazionale di Geofisica e Vulcanologia}, url = {http://www.ingv.it/editoria/rapporti/rapporto262/}, author = {Carmisciano, C. and Grassi, M. and Cocchi, L. and Giuseppe Masetti and Filippone, M. and Ricci, E. and Pratellesi, M. and Ivaldi, R. and Iannaccone, G. and Berrino, G. and De Natale, G. and Chiodini, G. and Caliro, S. and Dialti, L. and Guideri, M. and Muccini, F. and Stefanelli, P. and Orsi, G. and Iafolla, V. and Italiano, F. and Buongiorno, F. and Stramondo, S. and Bignami, C. and Polcari, M. and Silvestri, M.} }