Davide Gamboa

University of Aveiro | UA · Department of Geosciences

Points of confluence are important morphological features of deep-water submarine canyons, but they are still poorly characterized and incompletely understood. Here, high-quality 3-D seismic data are used to investigate the confluence regions of the Miocene (C1) and Modern (C2) submarine canyons of the Rio Doce Turbidite System in the Espírito Sant...

Submarine mass-transport deposits (MTDs) frequently include blocks of strata with variable deformation styles. In this paper, a 3D seismic volume from SE Brazil is compared with outcrop information from SE Crete to investigate multi-scale deformation patterns within mass-transport blocks. Block morphology relates closely to the orientation of inter...

High-quality 3D seismic data reveal bi-modal deformation styles in mass-transport deposits filling a salt minibasin in SE Brazil (Espírito Santo Basin). We analyse three mass-transport deposits within the same Miocene stratigraphic interval, and four others in Holocene strata. Our interpretation reveals that deformation in the mass-transport deposi...

The Sines Contourite Drift (SCD) is a plastered drift with terraced-like morphology, formed by the Mediterranean Outflow Water (MOW) that emplaced in the Alentejo Margin, SW Iberia. The high (~ 27 cm/kyr) and variable sedimentation rates experienced since the Pleistocene resulted in low consolidation, and the development of excess pore pressure, wh...

In situ mineral carbonation in porous and permeable mafic and ultramafic volcanic rocks is proposed to be a promising process that can contribute toward safe and permanent CO2 sequestration. Here, we investigated a partially buried Late Cretaceous composite volcano located offshore the central West Iberian margin as a proxy for potential in situ mi...

Calcareous rocks are commonly found in subduction zones, but few studies have investigated the consolidation and compactive deformation of these rocks prior to subduction, and their potential effects on subduction and accretionary processes are thus poorly understood. Using drilling data obtained during International Ocean Discovery Program (IODP)...

Submarine landslides are a ubiquitous geohazard in the marine environment and occur at multiple scales. Increasing efforts have been made during the last decade to catalogue and categorise submarine landslides in comprehensive databases, aiming to better understand their preconditioning and trigger factors. Using the recently compiled, open-access...

Submarine landslides are major geohazards occurring on distinct seabed domains ranging from shallow coastal areas to the deeper points of the ocean. The nature and relief of the seabed are key factors influencing the location and size of submarine landslides. Efforts have recently been made to compile databases of submarine landslide distribution a...

Seamounts are spectacular bathymetric features common within volcanic and tectonically active continental margins. During their lifecycles, they evolve through stages of construction and destruction. The latter are marked by variable magnitude flank collapses that often interrupt the evolution of seamounts and constitute a major source of hazard. T...

Submarine landslides are major geohazards occurring on distinct seabed domains ranging from shallow coastal areas to the deeper points of the ocean. The nature and relief of the seabed are key factors influencing the location and size of submarine landslides. Efforts have recently been made to compile databases of submarine landslide distribution a...

Carbon dioxide Capture and Storage (CCS) is considered a key strategy for decarbonising industries which have limited options for tackling CO2 process emissions. Previous efforts to develop CCS projects have been thwarted by adverse public perceptions amongst other issues. Understanding and tracking public perceptions prior to project development i...

This volume focuses on underwater or subaqueous landslides with the overarching goal of understanding how they affect society and the environment. The new research presented here is the result of significant advances made over recent years in directly monitoring submarine landslides, in standardizing global datasets for quantitative analysis, const...

Submarine landslides are common features occurring on the flanks of seamounts. Often triggered by earthquakes or volcanic activity, such landslides are potential generators of tsunamis that constitute a dire geohazard for coastal communities. Understanding the recurrence history and geomorphology of seamount-flanking landslides and their link to se...

The consequences of subaqueous landslides have been at the forefront of societal conscience more than ever in the last few years, with devastating and fatal events in the Indonesian Archipelago making global news. The new research presented in this volume demonstrates the breadth of ongoing investigation into subaqueous landslides, and shows that w...

Slow slip events (SSEs) accommodate a significant proportion of tectonic plate motion at subduction zones, yet little is known about the faults that actually host them. The shallow depth (<2 km) of well-documented SSEs at the Hikurangi subduction zone offshore New Zealand offers a unique opportunity to link geophysical imaging of the subduction zon...

Outcrop data from SE Crete and a high‐quality seismic volume from SE Brazil are used to characterize five types of mass‐transport deposits that are clear markers of tectonism in extensional basins. They include (1) carbonate blocks and breccia‐conglomerates showing limited gravitational collapse; (2) disrupted blocks, carbonate megabreccias, and bo...

This work summarises the research undertaken on mass‐transport deposits (MTDs) across the slope of the salt‐rich Espírito Santo Basin in SE Brazil. The three stratigraphic units analysed show MTDs with variable characteristics. Paleogene MTDs in Unit 1 have the lowest average area (137 Km2) and are associated to fractured paleo‐highs related to sal...

Confluences are geomorphologic features fed by distinct channel tributaries that record the contribution of multiple sediment sources. They are key features of both fluvial and submarine channels in geomorphologic and sedimentologic terms. Here, we use high-quality three-dimensional seismic data from SE Brazil to document the response of a submarin...

Carbon Capture and Storage (CCS) is a key technology towards a low-carbon energy future and will have an important role on the economic future of the UK Continental Shelf (UKCS). The East Irish Sea Basin (EISB) is a prospective area for CCS in the western UKCS, with a CO2 storage potential to store over 1.7 Gt. 3D seismic data and borehole informat...

Landslides are common in aquatic settings worldwide, from lakes and coastal environments to the deep sea. Fast-moving, large-volume landslides can potentially trigger destructive tsunamis. Landslides damage and disrupt global communication links and other critical marine infrastructure. Landslide deposits act as foci for localized, but important, d...

Landslides are common in aquatic settings worldwide, from lakes and coastal environments to the deep-sea. Fast-moving, large volume landslides can potentially trigger destructive tsunamis. Landslides damage and disrupt global communication links and other critical marine infrastructure. Landslide deposits act as foci for localised, but important de...

International Ocean Discovery Program (IODP) Expedition 372 combined two research topics, slow slip events (SSEs) on subduction faults (IODP Proposal 781A-Full) and actively deforming gas hydrate-bearing landslides (IODP Proposal 841-APL). Our study area on the Hikurangi margin, east of the coast of New Zealand, provided unique locations for addres...

Despite having been affected by several stages of exhumation during the Cretaceous and Cenozoic, the contemporary stress state of the East Irish Sea Basin (EISB) is poorly characterised. As the basin is mature in terms of exploitation of hydrocarbons, future exploration beyond the conventional Sherwood Sandstone Group reservoir (Triassic) necessita...

A Pliocene-Quaternary submarine channel system, influenced by localized mass wasting, is investigated using high-resolution 3D seismic data from offshore Espirito Santo Basin, SE Brazil. Three abandoned channels, a channel belt, and a mass-transport deposit (MTD) are recognized in the channel system in a confluence region confined by salt diapirs....

Carbon Capture and Storage (CCS) is key technology for low-carbon energy and industry. The UK hosts a large CO2 storage potential offshore with an estimated capacity of 78 Gt. The East Irish Sea Basin (EISB) is the key area for CCS in the western UK, with a CO2 storage potential of 1.7 Gt in hydrocarbon fields and in saline aquifers within the Tria...

Halokinesis imposes important deformation on the salt overburden units, commonly inducing slope instability and the occurrence of landslides. Using high-quality 3D seismic data from the Espirito Santo Basin, offshore SE Brazil, this work shows examples of the character of submarine landslides across the extensional, transitional and compressions do...

Confluences points are important features of deepwater submarine canyons, but still poorly characterised. High-quality 3D seismic data is used to investigate a Miocene buried canyon and a modern, active one on the Rio Doce Turbidite System in the Espírito Santo Basin (SE Brazil). Detailed mapping of canyon thalwegs reveal two distinct confluence mo...

Detailed morphological analyses of a Pleistocene-Holocene submarine channel system in terms of its hierarchical framework, were carried out using a 3D seismic volume from offshore Espírito Santo, SE Brazil. The channel morphology shows marked variations, with five segments (Segments a to e) being identified along its full length. For example, the c...

Carbon Capture and Storage (CCS) is a vital technology towards low-carbon energy resources and the mitigation of global warming trends induced by rising CO 2 levels in the atmosphere. The East Irish Sea Basin (EISB) is a key area for CCS in the western UK, having high CO 2 storage potentials in explored hydrocarbon fields and in saline aquifers wit...

A visit to a museum’s art collection, namely artwork from realist painters, is usually a quest for issues like history, the artist’s sensibility, the customs of the epoch, styles and painting techniques, pigments used in the artwork or only a glance over beauty. But beauty, pigments, materials are, ultimately, geological objects or depend on them....

Pockmarks are evidence of highly focused fluid flow, and constitute one of the best-documented expressions of seabed fluid escape. Pockmarks are shallow depressions developed in soft, fine-grained sediments, which are remobilized by the expulsion of fluids of variable composition such as biogenic or thermogenic gas, and pore water. Their spatial di...

High-quality 3D seismic data reveal bi-modal deformation styles in submarine MTDs generated in salt minibasins off Espírito Santo Basin (SE Brazil). Three Miocene mass-transport deposits observed in the same stratigraphic interval, and four modern deposits were mapped in order to assess their degree of internal heterogeneity. Our observations show...

Submarine mass-transport deposits (MTDs) frequently include blocks of strata with variable deformation styles. A 3D seismic volume from SE Brazil is compared with outcrop information from SE Crete to investigate multi-scale deformation patterns within mass-transport blocks. Block morphology relates closely to the orientation of internal faults and...

High-quality 3D seismic data are used to interpret the styles and scale-relationships of architectural elements on the continental slope of Espírito Santo (SE Brazil). Sand-prone architectural elements identified in this work include: a) axial canyons incising a salt-withdrawal basin (Unit 1), b) turbidite lobes intercalated with heterogeneous mass...

The Eocene-Oligocene stratigraphic succession of the Espírito Santo Basin, SE Brazil, comprises several Mass-Transport Deposits (MTDs), some of which contain individual blocks of strata. The blocks are classified as rafted blocks if transported over a glide plane, or remnant blocks if in situ, showing vertical stratigraphic continuity with underlyi...

High-quality 3D seismic data are used in this paper to: a) investigate the geometry of Miocene–Holocene submarine channels in confluence regions, and b) to correlate the geometry of channel confluences with the styles of topographic confinement imposed by salt structures in the Espírito Santo Basin (SE Brazil). A new method is used to analyse geomo...

The Eocene-Oligocene stratigraphic succession of the Espirito Santo Basin, SE Brazil, comprises several Mass-Transport Deposits (MTDs), some of which contain individual blocks of strata. The blocks are classified as rafted blocks if transported over a glide plane, or remnant blocks if in situ, showing vertical stratigraphic continuity with underlyi...

Three-dimensional seismic data are used to assess the control of halokinetic structures on the distribution of blocks in a mass transport deposit in the Espírito Santo Basin, southeast Brazil. In contrast to what is commonly observed over growing salt structures, the thickness of the MTD-A1 is larger on top of a northwest trending salt ridge. Empha...

Mass-wasting on the Brazilian margin during the Mid-Eocene/Oligocene resulted in the accumulation of recurrent Mass Transport Deposits (MTDs) offshore Espírito Santo, SE Brazil. In this paper, we use three-dimensional seismic data to characterize a succession with stacked MTDs (Abrolhos Formation), and to assess the distribution of undeformed strat...