A5087563308- Methane Hydrates and Related Phenomena
- Geomagnetism and Paleomagnetism Studies
- Geophysical and Geoelectrical Methods
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies
- Planetary Science and Exploration
- Astro and Planetary Science
- Geophysical Methods and Applications
- Astronomical Observations and Instrumentation
- Spacecraft and Cryogenic Technologies
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Geochemistry and Geologic Mapping
- Maritime and Coastal Archaeology
- Reservoir Engineering and Simulation Methods
- Seismic Waves and Analysis
- Geological Modeling and Analysis
- Cryospheric studies and observations
- High-pressure geophysics and materials
- Offshore Engineering and Technologies
- Marine and environmental studies
- Inertial Sensor and Navigation
University of Genoa
2021-2025
GNS Science
2014-2023
International Ocean Discovery Program
2019
Istituto Nazionale di Geofisica e Vulcanologia
2003-2010
University of Pisa
2003-2009
A global Earth Magnetic Anomaly Grid (EMAG2) has been compiled from satellite, ship, and airborne magnetic measurements. EMAG2 is a significant update of our previous candidate grid for the World Digital Map. The resolution improved 3 arc min to 2 min, altitude reduced 5 km 4 above geoid. Additional track line data have included, both over land oceans. Wherever available, original shipborne were used instead precompiled oceanic grids. Interpolation between sparse lines in oceans was by...
We obtained areal variations of crustal thickness, magnetic intensity, and degree melting the sub‐axial upwelling mantle at Thetis Nereus Deeps, two northernmost axial segments initial oceanic accretion in Red Sea, where Arabia is separating from Africa. The emplacement crust occurred South Central roughly ∼2.2 ∼2 Ma, respectively, taking place today northern southern tips. Basaltic glasses major trace element composition suggests a rift‐to‐drift transition marked by magmatic activity with...
The 2012 submarine eruption of Havre volcano in the Kermadec arc, New Zealand, is largest deep-ocean history and one very few recorded eruptions involving rhyolite magma. It was recognized from a gigantic 400-km2 pumice raft seen satellite imagery, but complexity this event concealed beneath sea surface. Mapping, observations, sampling by submersibles have provided an exceptionally high fidelity record seafloor products, which included lava sourced 14 vents at water depths 900 to 1220 m,...
Abstract We use a prestack depth migration reflection image and magnetic anomaly data across the northern Hikurangi subduction zone, New Zealand, to constrain plate boundary structure geometry of subducting seamount in region shallow slow slip recent International Ocean Discovery Program drilling. Our 3‐D model reveals as SW‐NE striking, lozenge‐shaped ridge approximately 40 km long 15 wide, with relief up 2.5 km. This broadly correlates 20‐km‐wide gap separating two patches large (>10...
We show a set of forward model equations in the Fourier domain for calculating 3‐D gravity and magnetic anomalies given distribution density or magnetization. One property potential field is that they are by convolution products, providing very simple analytic expression domain. Under this assumption, magnetization parameters connected biunivoc relationship with data space, can be seen as filtered versions corresponding distributions. A fine spatial discretization obtained using large number...
Significance Much of Earth’s volcanism occurs in the deep sea, yet little is known about microbial communities inhabiting such extreme and dynamic systems. Using a multidisciplinary approach to study distinct hydrothermal systems at Brothers submarine arc volcano, we provide insights into how community composition function reflect subtly different fluid chemistries resulting from subsurface interactions with alteration mineral assemblages. These variations can be traced hydrogeologic history...
Near-bottom magnetic anomaly data have been acquired using autonomous underwater vehicles at Brothers volcano, southern Kermadec arc, New Zealand. Crustal magnetization for the study area was obtained by inverting and shows a strong correlation between areas of low four hydrothermal fields, one which unknown prior to our surveys. The pattern is consistent with model discrete, individual zones fluid upflow focused along caldera ring faults that provide preferred pathways ascent fluids....
We describe and apply a new inversion method for 3‐D modeling of magnetic anomalies designed general application but which is particularly useful the interpretation near‐seafloor anomalies. The crust subsurface modeled by set prismatic cells, each with uniform magnetization, that together reproduce observed field. This problem linear respect to number cells normally greater than amount available data. Thus, solution obtained solving an under‐determined problem. A focused solution, exhibiting...
A survey of the Brothers caldera volcano (Kermadec arc) with autonomous underwater vehicle ABE has revealed new details morphology and structure this submarine frontal arc geologic setting its hydrothermal activity. formed between major SW-NEtrending faults within extensional field Havre Trough. may be unique among known calderas in that it four active systems, two high-temperature sulfide-depositing sites associated faulting on northwestern western walls (i.e., NW W sites, respectively),...
Research Article| November 01, 2011 Initial burst of oceanic crust accretion in the Red Sea due to edge-driven mantle convection Marco Ligi; Ligi * 1Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Via Gobetti 101, 40129 Bologna, Italy *E-mail: marco.ligi@bo.ismar.cnr.it. Search for other works by this author on: GSW Google Scholar Enrico Bonatti; Bonatti Italy2Lamont Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA Fabio Caratori Tontini; Tontini...
Subduction-transform edge propagators are lithospheric tears bounding slabs and back-arc basins. The volcanism at these edges is enigmatic because it lacking comprehensive geological geophysical data. Here we present bathymetric, potential-field data, direct observations of the seafloor on 90 km long Palinuro volcanic chain overlapping E-W striking tear roll-backing Ionian slab in Southern Tyrrhenian Sea. includes arc-type central volcanoes fissural, spreading-type centers emplaced along...
Research Article| December 01, 2014 The Anatomy of a Buried Submarine Hydrothermal System, Clark Volcano, Kermadec Arc, New Zealand C.E.J. de Ronde; Ronde † 1GNS Science, 1 Fairway Drive, Avalon, PO Box 30-368, Lower Hutt 6315, †Corresponding author: e-mail, Cornel.deRonde@gns.cri.nz Search for other works by this author on: GSW Google Scholar S.L. Walker; Walker 2Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, 7600 Sand Point Way NE, Seattle,...
This paper presents the revised aeromagnetic anomaly map of Italy and its surrounding seas, projected at reference altitude 2500 m geomagnetic epoch 1979.0. The magnetic data set used for compilation is composed total intensity field acquired partly during surveys performed by Italian National Oil Company (Agip - Direzione Esplorazione Idrocarburi) between 1971 1980, new committed Geophysical Corporate Services Eni Spa Exploration & Production Division in years 2001-2002. In both...
Abstract Inversion of new high‐resolution magnetic data from the Marsili seamount and surrounding basin in Tyrrhenian Sea reveals NNE–SSW magnetization stripes ranging Matuyama chron to Brunhes chron, including short positive Jaramillo subchron. The detailed chronology shows that late (1.77 Ma), average half spreading rate was about 1.5 cm yr −1 , with a slight decrease between events, when growth volcanic edifice overcame lateral spreading. Analysis volume erupted lava indicates at...
Sub-ice-shelf bathymetry exerts a primary control on the stability of ice shelves by guiding melt-inducing water masses and through pinning points that resist flow overriding ice. Collecting sub-ice-shelf data using active source seismic surveying or direct observations is inefficient, often impractical. Gravity methods provide pragmatic alternative, which observed variations in Earth’s gravitational field are used to estimate underlying bathymetry. We utilize new open-source...
Hydrothermal alteration may weaken volcanic rocks, causing the gravitational instability of portions active volcanoes with potentially hazardous collapses. Here we show high‐resolution multibeam, magnetic and gravity surveys Marsili seamount, largest volcano Europe located in southern Tyrrhenian back‐arc basin. These reveal zones exceptionally low densities vanishing magnetizations, due probably to comminution basalts during hyaloclastic submarine eruptions their post‐eruptive hydrothermal...
Research Article| December 01, 2014 Near-Bottom Magnetic Signatures of Submarine Hydrothermal Systems at Marsili and Palinuro Volcanoes, Southern Tyrrhenian Sea, Italy F. Caratori Tontini; Tontini † 1GNS Science, P.O. Box 30368, Lower Hutt, New Zealand †Corresponding author: e-mail, f.caratori.tontini@gns.cri.nz Search for other works by this author on: GSW Google Scholar G. Bortoluzzi; Bortoluzzi 2CNR, Ismar, via Gobetti, 101, 40129, Bologna, C. Carmisciano; Carmisciano 3INGV, U.P....
Key Points First systematic, integrated heat flow and magnetic study of a submarine arc volcano highlights multiscale convection cells Deep circulation structurally controlled, with recharge through the caldera floor discharge at walls postcollapse cones Shallow is characterized by zones in close proximity to sites present‐day diffuse focused
Abstract New geophysical data from Antarctica's Ross Embayment reveal the structure and subglacial geology of extended continental crust beneath Ice Shelf. We use airborne magnetic ROSETTA‐Ice Project to locate contact between basement overlying sediments. delineate a broad, segmented high with thin (0–500m) non‐magnetic sedimentary cover which trends northward into Sea's Central High. Before subsiding in Oligocene, this feature likely facilitated early glaciation region subsequently acted...