3D crustal architecture of the Alps-Apennines join — a new view on seismic data

Schumacher, Markus E.; Laubscher, H. P.

doi:10.1016/0040-1951(96)00046-7

Cited by 43 publications

(31 citation statements)

References 16 publications

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“…These new results show that the TPB was not affected by rotations during Tortonian to Quaternary times, despite ongoing shortening in the Apennine domain (e.g. Clari et al 1995;Schumacher & Laubscher 1996). Our data seem to be fairly consistent with rotations detected in the eastern and northern parts of the TPB (Thio 1988;Bormioli & Lanza 1995) and in the Northern Apennine for the Oligocene-Miocene time span (Muttoni et al 2000).…”

Section: Resultssupporting

confidence: 76%

“…During the Middle-Late Miocene, the western Po Plain was undergoing roughly c.N-S-directed shortening, with the development of the southverging Milano belt (Jura-Lombardic deformation phase ;Laubscher 1992;Schumacher & Laubscher 1996) and strong subsidence. Between the Langhian and the Serravallian the NW Apennine were undergoing roughly NE-SW shortening, responsible for the emplacement of the Ligurian units on to the Modino-Cervarola and Umbro-Marchean units (Pedeapennine Thrust Front, Boccaletti et al 1985).…”

Section: The Tpb and Its Regional Contextmentioning

confidence: 99%

“…Towards the north, the Oligo-Miocene sediments of the TPB dip underneath the younger clastic sediments of the western Po Plain (Dalla et al 1992;Schumacher & Laubscher 1996).…”

mentioning

confidence: 99%

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Subsidence, stress regime and rotation(s) of a tectonically active sedimentary basin within the western Alpine Orogen: the Tertiary Piedmont Basin (Alpine domain, NW Italy)

Carrapa

Bertotti

Krijgsman

2003

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The Oligocene to Miocene Tertiary Piedmont Basin (TPB) is located in the NW part of Italy at the junction between the Apennine and the Alpine thrust belts. The position of the TPB on top of the Alpine/Apennine Orogen poses fundamental questions as to the tectonics of the basin subsidence. Having undergone little deformation, the TPB sediments provide an insight into the stress regime and rotations in the kinematically very complex area surrounding the basin itself. In this study we integrate subsidence and structural analysis with measurements of magnetic susceptibility anisotropy (AMS) and natural remanent magnetization (NRM) in order to better constrain the tectonic kinematics of the basin evolution. A major important period of subsidence occurred in the Middle Miocene involving the whole basin. During this period the TPB experienced NE-SW-directed compression and limited shortening. Some NW-SE-directed compressional features have been identified and they were probably active during post Tortonian times. Structures associated with north-south tension are quite common, but the amount of strain that they accommodate is minor. In addition this research provides new preliminary data suggesting counterclockwise rotation in the TPB by c. 20° which has taken place during Middle Miocene time.

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Section: Resultssupporting

confidence: 76%

Section: The Tpb and Its Regional Contextmentioning

confidence: 99%

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Subsidence, stress regime and rotation(s) of a tectonically active sedimentary basin within the western Alpine Orogen: the Tertiary Piedmont Basin (Alpine domain, NW Italy)

Carrapa

Bertotti

Krijgsman

2003

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“…1A, 2 and 12B) including the buried metamorphic Western Alpine units, the SE-verging front of the South Alpine thrust system (i.e., Adria Units), and the northeast-verging External Ligurian Units of the Northern Apennines (i.e., the outer part of the Apenninic prowedge) (see, e.g. Biella et al 1988Biella et al , 1997Laubscher et al 1992;Castellarin 1994;Mutti et al 1995;Roure et al 1996;Schumacher and Laubscher, 1996;Piana 2000;Mosca et al 2010). In the northwestern sector of the studied area (Monferrato and Torino Hill), the SE-ward migration of the South Alpine thrust system is recorded within the upper Eocene -Oligocene succession (Festa et al 2005(Festa et al , 2009Mosca et al 2010).…”

Section: 3mentioning

confidence: 99%

“…12B). This tectonic junction (i.e., the "Ligurian knot" of Laubscher et al 1992;Schumacher and Laubscher, 1996) results in a complex tectonic jigsaw (Figs. 1A, 2 and 12B) including the buried metamorphic Western Alpine units, the SE-verging front of the South Alpine thrust system (i.e., Adria Units), and the northeast-verging External Ligurian Units of the Northern Apennines (i.e., the outer part of the Apenninic prowedge) (see, e.g.…”

Section: 3mentioning

confidence: 99%

Late Oligocene–early Miocene olistostromes (sedimentary mélanges) as tectono-stratigraphic constraints to the geodynamic evolution of the exhumed Ligurian accretionary complex (Northern Apennines, NW Italy)

Festa

Ogata

Pini

et al. 2014

International Geology Review

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This is an author version of the contribution published on:Questa è la versione dell'autore dell'opera: Review, v. 57, no. 5-8, 540-562. Doi: 10.1080/00206814.2014. Festa et al. (2015) -International GeologyThe definitive version is available at:La versione definitiva è disponibile alla URL:http://www.tandfonline.com/loi/tigr20 AbstractIn the Northern Apennines of Italy, mud-rich olistostromes (sedimentary mélanges) occur at different stratigraphic levels within late Oligocene -early Miocene sedimentary record of episutural/wedge-top basins. They are widely distributed along the exhumed outer part of the Ligurian accretionary complex, atop of the outer Apenninic prowedge, over an area of about 300 km long and 10-15 km wide. Olistostromes represent excellent examples of ancient submarine mass-transport complexes (MTCs), consisting of stacked cohesive debris flows that can be directly compared with some of those observed in modern accretionary wedges. We describe the internal arrangement of olistostrome occurrences in the sector between Voghera and the Monferrato, analyzing their relationships with mesoscale liquefaction features, which are commonly difficult to observe in modern MTCs. Slope failures occurred in isolated sectors along the wedge front, where out-of-sequence thrusting, seismicity and different pulses of overpressured tectonically-induced fluid flows acted concomitantly. Referring to the Northern Apennines regional geology, we also point out a gradual lateral rejuvenation (from late Oligocene to early Miocene) toward the SE and an increasing in size and thickness of the olistostromes along the strike of the frontal Apenninic prowedge. This suggests that morphological reshaping of the outer prowedge via mass transport processes balanced with different pulses in a short time span the SE-ward migration and segmentation of the accretionary processes. The latter have been probably favored by the occurrence in the northwestern part of the Northern Apennines of major, inherited paleogeographic features controlling the northward propagation of the prowedge. The detailed knowledge of olistostromes, as ancient examples of MTCs related to syn-sedimentary tectonics and shale diapirism, and of their lateral variations in term of age and size, provides useful information for better understanding both the tectono-stratigraphic evolution of the Apenninic prowedge and the submarine slope failures in modern accretionary wedges.

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Geomorphological and historical data in assessing landslide hazard

Carrara

Crosta

Frattini

2003

Earth Surf Processes Landf

172

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Traditionally, earth scientists assess landslide occurrence on the basis of geomorphological investigations carried out through aerial photograph interpretation and fieldwork. Conversely, local administrators primarily evaluate the impact of natural catastrophes, such as landsliding, on the basis of historical records and data. Owing to the substantial difference in the structure and spatial density of these two types of information, it is difficult to compare them directly and few investigators have attempted this.We compared landslide information derived from geomorphological mapping and historical data in a pilot area (the Staffora river basin, northern Italy). To do this we generated two multivariate statistical models where the dependent variable was either the mapped landslide deposits (geomorphological model), or the historical sites affected by landslide-induced damage (historical model). By quantitatively comparing these two model maps, we demonstrate that the geomorphological model performs better in terms of percentage of terrain units correctly predicted as stable or unstable. The historical model underestimates landslide hazard mainly where human structures are lacking. However, it highlights slopes where landslide movements take place with a high frequency at the temporal scale of human life. Hence, the joint use of these two models may facilitate the knowledge of the overall instability conditions of a given region and the identification of the landslides that are most frequently reactivated.

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3D crustal architecture of the Alps-Apennines join — a new view on seismic data

Cited by 43 publications

References 16 publications

Subsidence, stress regime and rotation(s) of a tectonically active sedimentary basin within the western Alpine Orogen: the Tertiary Piedmont Basin (Alpine domain, NW Italy)

Subsidence, stress regime and rotation(s) of a tectonically active sedimentary basin within the western Alpine Orogen: the Tertiary Piedmont Basin (Alpine domain, NW Italy)

Late Oligocene–early Miocene olistostromes (sedimentary mélanges) as tectono-stratigraphic constraints to the geodynamic evolution of the exhumed Ligurian accretionary complex (Northern Apennines, NW Italy)

Geomorphological and historical data in assessing landslide hazard

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