Andrea Bistacchi

Andrea Bistacchi
Università degli Studi di Milano-Bicocca | UNIMIB · Department of Earth and Environmental Sciences

About

133
Publications
32,616
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1,660
Citations
Citations since 2016
42 Research Items
1004 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150

Publications

Publications (133)
Article
Full-text available
The Middle Jurassic limestones of the Vajont Formation, which constitute major parts of the flanks of the Vajont Canyon (Southern Alps, Italy), have been subjected to pervasive dolomitization. The dolomites are localized within fault damage zones. Based on field and petrographic characteristics, two dolostone groups can be differentiated. Group 1,...
Chapter
Collecting quantitative and extensive datasets in the field is fundamental in structural geology, stratigraphy, and sedimentology, rock mechanics, and in other fields of the Earth and planetary sciences. Digital Outcrop Models (DOMs) provide a 3D framework for collecting these large datasets and can be obtained from laser scanning or photogrammetri...
Chapter
Digital Outcrop Models (DOMs) are increasingly applied to obtain large, statistically valuable datasets of 3D geological data. However, extracting the traces of geological features from outcrop images is still a time‐consuming and subjective process, limiting the production of very large datasets and the reproducibility of the results. We are curre...
Chapter
Collecting quantitative data to support geological analysis and modelling is nowadays a fundamental requirement in all geology disciplines, including structural geology, stratigraphy, and geomorphology, on the Earth and on planetary bodies of the Solar System. In many cases the answer to this need is a Digital Outcrop Model (DOM), a Digital Elevati...
Article
Despite that many field studies on joint attribute statistics are available in the literature, there is still an ongoing debate on the most effective statistical treatment to properly describe the distribution of a fundamental parameter like joint spacing. This may also relate to the objective difficulty of collecting very large datasets from singl...
Article
Full-text available
Plain Language Summary The Martian northern hemisphere displays mounds interpreted to be the result of sediment and water erupting onto the surface. We analyzed the mounds spatial distribution and found patterns that reflects the extent at depth of the subsurface conduits that fed those mounds (array of fractures, i.e., high permeability pathways)...
Article
Full-text available
In many orogenic wedges, foreland basin systems are preferential sites for economical resource accumulation, typically hydrocarbons. Understanding how structural inheritance perturbs the evolution of folding‐related deformation and impacts on subsurface fracture patterns bears first order economic and environmental implications, when also CO2 stora...
Article
Full-text available
Tectonic pseudotachylytes are thought to be unique to certain water–deficient seismogenic environments and their presence is considered to be rare in the geological record. Here, we present field and experimental evidence that frictional melting can occur in hydrothermal fluid–rich faults hosted in the continental crust. Pseudotachylytes were found...
Article
The northern Adamello batholith (European Southern Alps) is crosscut by E-W trending pseudotachylyte-bearing paleoseismic fault zones composed of multiple subparallel fault strands. The main faults are the Gole Strette Fault Zone (GSFZ), here discussed in detail, and the Gole Larghe Fault Zone (GLFZ). The western ending of the GSFZ intersects the p...
Article
Full-text available
We present an innovative workflow for the statistical analysis of fracture data collected along scanlines, composed of two major stages, each one with alternative options. A prerequisite in our analysis is the assessment of stationarity of the dataset, which is motivated by statistical and geological considerations. Calculating statistics on non-st...
Article
Full-text available
The mechanics and seismogenic behavior of fault zones are strongly influenced by their internal structure. In this perspective, the internal structure of the extensional seismically active Vado di Corno Fault Zone (VCFZ, Central Apennines, Italy) was quantified by combining high‐resolution structural mapping with 3‐D fault network analysis over ∼2...
Article
Fault damage zones can act as a preferential corridor for fluid flow in the subsurface, and for this reason the characterization of their structure, including the attributes of the associated fracture network, is fundamental. In this work, we characterize the damage zone of the Qala fault, a normal fault developed in platform carbonates of the Gozo...
Preprint
Full-text available
Abstract. We present an innovative workflow for the statistical analysis of fracture data collected along scanlines, composed of two major stages, each one with alternative options. A prerequisite in our analysis is the assessment of stationarity of the dataset, that is motivated by statistical and geological motivations. Calculating statistics on...
Conference Paper
OBJECTIVES To select the "best outcrop analogue" of a subsurface field/prospect is always challenging, especially when dealing with fractured carbonatic reservoirs. The candidate should match the mechanical stratigraphy, the depositional conditions, the diagenetic history, the tectonic evolution. This is almost impossible, considering that at least...
Presentation
Full-text available
Classical fold evolution models are oversimplified in transpressional orogens and the interplay between thrusting and folding at the wedge toe result in deformation patterns and cross-cutting relationship that does not comply with classical templates, which are well-known in literature. The case of Pag anticline (External Dinarides, Croatia) offere...
Article
Full-text available
The tectonic and geodynamic evolution of the Pelagian platform and of the Pantelleria Rift System, located in the foreland of the Apennine‐Sicilian‐Maghrebian Belt, from the Late Oligocene onward, is still debated. Here we present a new interpretation based on structural data collected in the Malta and Gozo islands. With a tectonic back‐stripping a...
Poster
Full-text available
The geometry of fault zones (e.g. fault surface roughness, fault rock distribution, network of secondary faults and fractures) is one of the main factors controlling earthquake nucleation, rupture speed and length of main shocks, foreshock and aftershock evolution, ground motion and seismic radiation pattern. Despite the pivotal role that fault geo...
Article
Data acquired by an Autonomous Underwater Vehicle (AUV) towing a source (1600 Hz – 3500 Hz) and an horizontal array of hydrophones have been analysed to image discrete, isolated or even a small cluster of scatterers within the sediment, to determine shallow migration paths of hydrocarbons in a mud‐volcano system of the Malta Plateau (MP). An algori...
Article
Full-text available
Although geological, seismological, and geophysical evidence indicates that fracture damage and physical properties of fault-related rocks are intimately linked, their relationships remain poorly constrained. Here we correlate quantitative observations of microfracture damage within the exhumed Gole Larghe Fault Zone (Italian Southern Alps) with ul...
Article
The mechanical strength of foliated rocks is typically anisotropic because it varies with the orientation of the foliation relative to the applied principal stresses and commonly depends on phyllosicate content and phyllosicate physical interconnectivity. We constrain the degree of mechanical anisotropy associated with pre-existing planar discontin...
Poster
Full-text available
A stress based method to represent fracture aperture heterogeneity as an input for fluid flow from realistic, outcrop derived DFN fracture representations
Conference Paper
Fracture distribution and properties exerts a primary role in the control of fluid flow in hydrocarbon reservoirs. However, fracture parameters are difficult to collect in the subsurface from seismic and borehole data. Quantitative studies on outcrop analogues of hydrocarbon reservoirs allow to better characterize the fracture patterns in relation...
Conference Paper
Full-text available
In the submarine environment, the identification and characterization of macro-seeps requires support of geophysi-cal remote-sensing techniques. In our work, data acquired by an Autonomous Underwater Vehicle (AUV) towing a source (1600 Hz-3500 Hz) and an horizontal array of hydrophones have been analysed to image discrete, isolated or even a small...
Conference Paper
Full-text available
Natural fractures are one of the most common geological features occurring on the upper crust (Pollard and Aydin, 1988). Fracture networks can act as fluid pathways or fluid barriers and may have an impact on reservoir properties at depth (Laubach and Ward, 2006). However, the distribution of fractures in the subsurface is largely unknown due to th...
Article
The development of Andersonian faults is predicted, according to theory and experiments, for brittle/frictional deformation occurring in a homogeneous medium. In contrast, in an anisotropic medium it is possible to observe fault nucleation and propagation that is non-Andersonian in geometry and kinematics. Here, we consider post-metamorphic brittle...
Conference Paper
Full-text available
Fluid transport and storage properties in fractured carbonates are controlled by the distribution of fractures, particularly at the 1-m to 100-m scale. However, fractures are poorly imaged in seismics at this scale, and wells provide just a sparse 1D sample in a 3D volume. Quantitative studies on field analogues of reservoirs allow to characterize...
Conference Paper
Full-text available
The study of outcrop analogues and particularly the reconstruction of 3D geological models starting from field data can help predicting fracturing state, facies distribution, and hence hydraulic properties in the subsurface, e.g. in hydrocarbon reservoirs. In this work we present a multidisciplinary approach combining traditional field mapping , re...
Conference Paper
Full-text available
The study of outcrop analogues and particularly the reconstruction of 3D geological models starting from field data can help predicting fracturing state, facies distribution, and hence hydraulic properties in the subsurface, e.g. in hydrocarbon reservoirs. In this work we present a multidisciplinary approach combining traditional field mapping , re...
Article
Full-text available
Recent estimates of fracture energy G ′ in earthquakes show a power-law dependence with slip u which can be summarized as G ′ ∝ u a where a is a positive real slightly larger than one. For cracks with sliding friction, fracture energy can be equated to G f : the post-failure integral of the dynamic weakening curve. If the dominant dissipative proce...
Conference Paper
Full-text available
The decrease in discoveries of new hydrocarbon reservoirs has twofold implications: i) the need to improve our knowledge of classic reservoirs, such as traps within extensional syn-sedimentary structures, and ii) enhanced efforts aimed at better understanding complex reservoirs. In particular, in the last few years, fault related dolomitized bodies...
Conference Paper
Full-text available
Three-dimensional photogrammetric techniques arecommonly used to generate high-resolution digital outcrop models suitable to complement stratigraphic and structural field studies. This is particularly true for near vertical outcrops were direct data collection is very difficult to perform, provided that the data are reliable. To check whether fract...
Conference Paper
Full-text available
The decrease in discoveries of new hydrocarbon reservoirs has twofold implications: i) the need to improve our knowledge of classic reservoirs, such as traps within extensional syn-sedimentary structures, and ii) enhanced efforts aimed at better understanding complex type of reservoirs. In particular, in the last few years, fault related dolomitize...
Article
Laboratory experiments reproducing seismic slip conditions show extreme frictional weakening due to the activation of lubrication processes (DiToro et al., 2011). Due to a substantial variability in the details of the weakening transient, generalization of experimental results and comparison to seismic observations has not been possible so far. Her...
Article
The aim of this study is to evaluate what seismic attributes are best able to highlight porous non-stratabound dolostone geobodies set in low porosity limestone. For this purpose three dolostone geobody volume scenarios were defined using outcrop based 3D models to define the range of dimensions of dolostone geobodies and their association with par...
Article
The Simplon Fault Zone is a late-collisional low-angle normal fault (LANF) of the Western Alps. The hanging wall shows evidence of brittle deformation only, while the footwall is characterized by a c. 1 km-thick shear zone (the Simplon Fault Zone), which continuously evolved, during exhumation and cooling, from amphibolite facies conditions to brit...
Article
Following the steps of Émile Argand, who in 1911 provided the first 3D geological reconstruction of the Penninic nappe stack in the western Alps, it is nowadays possible with software-assisted implementations of the same geo-structural concepts to retrieve rigorous 3D geological models for major engineering projects, such as transalpine tunnels. Am...
Article
Full-text available
Different remote sensing technologies, including photogrammetry and LIDAR (light detection and ranging), allow collecting three-dimensional (3D) data sets that can be used to create 3D digital representations of outcrop surfaces, called digital outcrop models (DOM). The main advantages of photogrammetry over LIDAR are represented by the very simple...
Presentation
Full-text available
Earthquake fault dynamics: Insights from laboratory experiments
Conference Paper
Full-text available
The geometrical, structural and geomechanical characterization of large-scale folded structures in sedimentary rocks is an important issue for different geological and geo-hazard applications (e.g. hydrocarbon and geothermal reservoir exploitation, natural rock slope stability, mining, and tunnelling). Fold geometry controls topography and the spat...
Conference Paper
The Vajont rockslide has been the object of several studies because of its catastrophic consequences and of its particular evolution. Several qualitative or quantitative models have been presented in the last 50 years, but a complete explanation of all the relevant geological and mechanical processes remains elusive. In order to better understand t...
Conference Paper
Full-text available
The Gole Larghe Fault Zone (GLFZ, Italian S Alps) was exhumed from c. 8 km, where it was characterized by seismic activity (pseudotachylytes) but also by hydrous fluid flow (alteration halos and precipitation of hydrothermal minerals in veins and cataclasites). The fault zone has previously been quantitatively characterized (Bistacchi 2011, PAGEOPH...
Conference Paper
Full-text available
Defining the range of dimensions of dolomite geobodies and their associated fault populations using subsurface data alone is a cumbersome task. Incorporating outcrop analogues can provide information about geobody sizes and rock properties; however individual outcrops have a non-3D nature limited by their orientation. The focus of this presentation...
Article
Interconnected networks of faults and veins filled with hydrothermal minerals such as zeolite are widespread in many orogenic terrains. These fractures commonly form at relatively low temperatures (e.g. <200 degrees C) late in the tectonic history and represent significant phases of fluid flow and mineralisation during exhumation. Zeolite-bearing f...
Article
We present a 1:30,000 geological map resulting from detailed geostructural surveys carried out along the Italian segment of the design corridor for the Brenner Pass railway base tunnel (BBT), extending from Fortezza (Italy) to Innsbruck (Austria). The map covers the southern part of the Austroalpine-Penninic collisional wedge, the Periadriatic Faul...
Conference Paper
The Vajont rockslide has been the object of several studies because of its catastrophic consequences and particular evolution. Several qualitative or quantitative models have been presented in the last 50 years, but a complete explanation of all relevant geological and mechanical processes remains elusive. In order to better understand the mechanic...
Conference Paper
The Vajont Gorge (Dolomiti Bellunesi, Italy) provides spectacular outcrops of Upper Jurassic limestones (Vajont Limestone Formation) in which Mesozoic and Cenozoic (Alpine) faults and fracture corridors are continuously exposed. The Mesozoic normal faults and fracture corridors acted as conduits for Mg-rich fluids, resulting in structurally-control...
Conference Paper
Full-text available
The Vajont landslide has been the object of several studies because of its catastrophic consequences and particular evolution. Several qualitative or quantitative models have been presented in the last 50 years, but a complete explanation of all relevant geological and mechanical processes still remains elusive. In order to better understand the me...
Article
The 600 m-thick Gole Larghe Fault Zone (GLFZ) is hosted in jointed crystalline basement and exposed across glacier-polished outcrops in the Italian Alps. Ancient seismicity is attested by the widespread occurrence of cataclasites associated with pseudotachylytes (solidified frictional melts) formed at 9–11 km depth and ambient temperatures of 250–3...
Article
Earthquake swarms are often characterised by clusters of seismic events with highly variable earthquake focal mechanisms, irrespective of whether or not they are associated with a main shock event. Our current understanding of how such events manifest themselves in the geological record is based largely on the Hill (1977) and Sibson (1996) 'fractur...
Conference Paper
The Scientific Imaging System for Rosetta, OSIRIS, acquired an imaging sequence of Lutetia allowed the detection of a huge number of lineaments distributed over most of the asteroid surface Thomas et al., 2012, Planet. Space Sci., 66, 96-124; Massironi et al., 2012, Planet. Space Sci., 66, 125-136) . Several categories of features has been observed...
Article
One of the possible mechanisms explaining the nucleation and propagation of weak faults showing a non-Andersonian attitude is the mechanical anisotropy of phyllosilicate-rich mylonitic rocks. Here we analyze the mutual orientation of foliation and stress field axes in the specific case of the Grandes Rousse Massif (France) and discuss the implicati...
Article
Fluid flow along fault zones is a major issue in structural geology and seismology. The permeability of fault rocks can be measured in laboratory experiments (e.g. Mitchell et al., this meeting) but its upscaling to large scale structures is not an easy task. On the other hand, in-situ measurements of permeability have been carried out just at rela...
Conference Paper
Data on the exact location of the failure surface of the landslide have been used as the starting point for the modelling of the landslide. 3 dimensional numerical analyses were run employing both the discrete element method (DEM) and a Finite Element Method (FEM) code. In this work the focus is on the prediction of the movement of the landlside du...
Article
Spatial distribution and orientation of dykes propagating from a magma chamber are key elements to verify its depth through fractal analysis and FEM modeling.
Article
Full-text available
The Vajont rockslide is not the largest rockslide in the Italian Alps, but it is a reference at a worldwide scale due to its complex behaviour and catastrophic effects in terms of economic losses and human casualties. An essential aspect to be considered in any kind of approach to the Vajont landslide, whether hydrogeological, geomorphological or r...
Conference Paper
Data on the exact location of the failure surface of the landslide have been used as the starting point for the modelling of the landslide. 3 dimensional numerical analyses were run employing both the discrete element method (DEM) and a Finite Element Method (FEM) code. In this work the focus is on the prediction of the movement of the landlside du...
Article
Full-text available
The 1963 collapse of the northern slope of the Monte Toc in the Vajont reservoir is probably one of the most studied landslides worldwide. During the various studies several numerical models have been proposed to explain the collapse dynamics but a comprehensive and reliable insight into the failure kinematics is still missing. A major step forward...