Geometry and kinematics of the Montelanico-Carpineto Backthrust (Lepini Mts., Latium) in the hangingwall of the early Messinian thrust front of the central Apennines: implications for the Apennine chain building

2013 ◽  
Vol 132 (2) ◽  
pp. 274-289 ◽  
Author(s):  
Marco Tallini ◽  
Maurizio Parotto
Keyword(s):  
Central Apennines ◽  
Thrust Front ◽  
Apennine Chain ◽  
Geometry And Kinematics

Constraining the onset of the Holocene “Neoglacial” over the central Italy using tephra layers

2012 ◽  
Vol 78 (2) ◽  
pp. 236-247 ◽  
Author(s):  
Giovanni Zanchetta ◽  
Carlo Giraudi ◽  
Roberto Sulpizio ◽  
Michel Magny ◽  
Russell N. Drysdale ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Central Italy ◽  
Climatic Changes ◽  
Common Method ◽  
Chemical Analyses ◽  
High Mountains ◽  
Central Apennines ◽  
The Holocene ◽  
Tephra Layers ◽  
Apennine Chain

AbstractA study of six tephra layers discovered in different deposits between 1600 and 2700 m a.s.l. in the Apennine chain in central Italy allowed precise stratigraphic constraints on environmental and climatic changes between ca. 4.5 and 3.8 cal ka BP. Chemical analyses allowed the correlation of these tephra layers with the eruptions of Agnano Mt Spina (AMST) from Phlegrean Field and Avellino (AVT) from Somma–Vesuvius. Major environmental changes in the high mountains of the Central Apennines occurred just after the deposition of the AMST and predate the deposition of the AVT. At this time, renewed growth of the Calderone Glacier occurred, marking the onset of the Apennine “Neoglacial”. The presence of the AMST and AVT enabled us to make a precise, physical correlation with other archives in central Italy. Synchronization of records between sites showed that the period intervening the deposition of the AMST and AVT layers coincided with environmental changes that were not always exactly in phase. This highlights the fact that stratigraphic correlations using only radiocarbon chronologies (the most common method used for dating archives during the Holocene) could produce erroneous correlation of events, giving rise to oversimplified paleoclimatic reconstructions.

scholarly journals Geometry and kinematics of the Boulonnais fold-andthrust belt (N France): implications for the dynamics of the Northern Variscan thrust front

2004 ◽  
Vol 17 (2) ◽  
pp. 163-178 ◽  
Author(s):  
Olivier Averbuch ◽  
Jean-Louis Mansy ◽  
Juliette Lamarcheb ◽  
Frédéric Lacquement ◽  
Franck Hanot
Keyword(s):  
Thrust Front ◽  
Geometry And Kinematics

scholarly journals Paleomagnetic and Anisotropy of Magnetic Susceptibility (AMS) analyses of the Plio-Pleistocene extensional Todi basin, Central Italy

1997 ◽  
Vol 40 (6) ◽  
Author(s):  
L. Alfonsi
Keyword(s):  
Magnetic Susceptibility ◽  
Central Italy ◽  
Vertical Axis ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Central Apennines ◽  
Homogeneous Process ◽  
Lower Pleistocene ◽  
Tectonic Framework ◽  
Axis Rotation ◽  
Apennine Chain

In the last few years paleomagnetic investigations within the Apennine chain have revealed that the area is characterized by a complex pattern of deformation, not linkable to a simple and homogeneous process. In order to estimate the amount, sense and timing of vertical axis rotations within the Central Apennines, Neogene continental basins have been investigated for paleomagnetic studies. The paleomagnetic results obtained in the Plio-Pleistocene Todi basin showed that the Upper Pliocene-Lower Pleistocene evolution, associated with major dip-slip tectonics, has not involved vertical axis rotation since that time. The Anisotropy of Magnetic Susceptibility analysis (AMS), carried out on the same samples treated for paleomagnetic determination, revealed the presence of two groups of specimens characterized by different magnetic lineation directions. One direction trends NE-SW and is parallel to the orientation of the regional extension stress typical of the area. This direction is observed throughout the northern basin. The other, restricted to the southern basin, trends N-S and shows no links with the tectonic, hydrological-sedimentary conditions of the area. The results of the AMS analysis will be presented and discussed in the light of the rock magnetic results and the tectonic framework of the area.

3D geometry and kinematics of the Northern Variscan Thrust Front in Northern France: new insights based on reprocessing and interpretation of seismic reflection profiles.

2021 ◽  
Author(s):  
Aurore Laurent ◽  
Olivier Averbuch ◽  
Laurent Beccaletto ◽  
Fabien Graveleau ◽  
Frédéric Lacquement ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Foreland Basin ◽  
Northern France ◽  
Thrust Front ◽  
3D Geometry ◽  
Mountain Front ◽  
Thrust Zone ◽  
Seismic Reflection Profiles ◽  
Nw Europe ◽  
Geometry And Kinematics

<p>In NW Europe, the Upper Carboniferous Variscan collision between Avalonia and the Armorica-Gondwana accretion complex led to the progressive tectonic inversion of the southern Avalonian margin and the development of a crustal-scale north-vergent thrust system propagating outward from the Late Mississippian to the Middle Pennsylvanian (330-305 Ma). The northern Variscan thrust front spreads over 2,000 km across NW Europe. In the Nord-Pas-de-Calais (NPC) coal district area (northern France), its 3D geometry and kinematics have been investigated through the reprocessing and interpretation of 532 km in length of industrial seismic reflection profiles acquired in the 1980s. The seismic interpretations point out the major compressional and extensional tectonic features affecting this fossil, deeply eroded, mountain front, highlighting its very atypical structure and kinematics.</p><p>The deformation front is characterized by a main frontal thrust zone localizing most of the northward displacement (i.e. several tens of kilometers) of the Ardennes Allochthonous Unit above the slightly-deformed part of the Avalonian margin, referred to as the Brabant Para-autochthonous Unit. This large displacement induced the underthrusting of the molassic foreland basin (NPC coal basin) over nearly 20 km and was associated to the out-of-sequence dislocation of the mountain front. The underthrust Brabant Para-autochthonous Unit, made of both the Namurian-Westphalian (330-305 Ma) molassic foreland basin and the underlying Mid-Upper Devonian (390-360 Ma) and Dinantian (360-330 Ma) carbonate platform, is deformed by a series of second-order north-vergent thrust faults, often associated with ramp-related folds. These thrust faults are rooted in décollement zones located either at the transition between the Namurian shales and the Dinantian carbonates or in the Famennian shales.</p><p>The 3D integration of the seismic interpretations led to the characterization of a major lateral ramp oriented NW-SE, affecting both the main frontal thrust zone and the basal thrust of some Overturned Thrust Sheets developed at its footwall. This lateral ramp represents a major zone of relay along the thrust front, in between two major segments, oriented respectively ENE-WSW to the east and WNW-ESE to the west. At the base of the underthrust Brabant Para-autochthonous Unit, the Mid-Upper Devonian platform is shown to be structured by synsedimentary normal faults responsible for the southward deepening and thickening of the southern Avalonian margin. These faults are oriented along two main directions i.e. N060-080° and N110-130°, that is the general orientation of the future Variscan structures. Overall, the results indicate that the Devonian pre-structuration of the southern Avalonian margin exerted a primary control on the dynamics and segmentation of the Northern Variscan Front in northern France by localizing both the frontal and lateral ramps within the thrust wedge.</p>

Three-dimensional fault geometry and kinematics of the 2008 M 7.1 Yutian earthquake revealed by very-high resolution satellite stereo imagery

2019 ◽  
Vol 232 ◽  
pp. 111300
Author(s):  
Xiaogang Song ◽  
Nana Han ◽  
Xinjian Shan ◽  
Chisheng Wang ◽  
Yingfeng Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Three Dimensional ◽  
Fault Geometry ◽  
Stereo Imagery ◽  
Very High ◽  
Geometry And Kinematics
Sign in / Sign up

Export Citation Format

Share Document