The cover-basement contact beneath the Rawil axial depression (western Alps): True amplitude seismic processing, petrophysical properties, and modelling

Levato, L.; Sellami, Souad; Epard, Jean-Luc; Pruniaux, B.; Olivier, R.; Wagner, Jean-Jacques; Masson, Henri

doi:10.1016/0040-1951(94)90099-x

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…These units are exposed as the Aar massif in the NE and the Aiguilles Rouges and Mont Blanc massifs in the SW and are overlain by the folded limestone units of the Helvetic nappes in the Rawil depression. The suggested depth of the basement-cover contact below this depression is about 3-6 km (Burkhard, 1988;Levato et al, 1994;Pfiffner et al, 1997;Steck et al, 1997). A seismically active, regional-scale fault, called the Rawil Fault Zone (RFZ), is proposed below the Rawil depression (Burkhard, 1988;Cardello & Mancktelow, 2015;Lee et al, 2023;Maurer et al, 1997).…”

Section: Geological Setting and Recent Seismicitymentioning

confidence: 99%

Hypocenter‐Based 3D Imaging of Active Faults: Method and Applications in the Southwestern Swiss Alps

2023

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Section: Geological Setting and Recent Seismicitymentioning

confidence: 99%

Hypocenter‐Based 3D Imaging of Active Faults: Method and Applications in the Southwestern Swiss Alps

2023

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“…1; cf. Ramsay 1981Ramsay , 1989Burkhard 1988a, b;Dietrich 1989a, b;Dietrich and Casey 1989;Levato et al 1994). In the centre of the depression, the structurally highest Wildhorn nappe is exposed.…”

Section: Fault Setsmentioning

confidence: 99%

“…Several important problems concerning the geometry and origin of the Rawil depression remain unresolved. Published projections and contour line constructions suggest that the basement rocks below the depression may go down to a depth of 4-6 km below sea level (Burkhard 1988a, b;Dietrich 1989a;Levato et al 1994). Burkhard (1988b) considered the overall distribution of tectonic units and constructed a symmetric depression with the centre lying in the region of the Rawil pass ( Fig.…”

Section: Fault Setsmentioning

confidence: 99%

Brittle faulting in the Rawil depression: field observations from the Rezli fault zones, Helvetic nappes, Western Switzerland

Gasser

Mancktelow

2010

Swiss J Geosci

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The Helvetic nappes in the Swiss Alps form a classic fold-and-thrust belt related to overall NNW-directed transport. In western Switzerland, the plunge of nappe fold axes and the regional distribution of units define a broad depression, the Rawil depression, between the culminations of Aiguilles Rouge massif to the SW and Aar massif to the NE. A compilation of data from the literature shows that, in addition to thrusts related to nappe stacking, the Rawil depression is cross-cut by four sets of brittle faults: (1) NE-SW striking normal faults, (2) NW-SE striking normal faults and joints, (3) ENE-WSW striking and (4) WNW-ESE striking normal plus dextral obliqueslip faults. Fault set 1 was probably initiated during sedimentation and reactivated during nappe stacking, whereas the other fault sets formed after emplacement of the Helvetic nappes. We studied in detail two well-exposed parallel fault zones from set 4, the Rezli fault zones (RFZ) in the Wildhorn Nappe. They are SW-dipping oblique-slip faults with a total displacement across the two fault zones of *200 m vertically and *680 m horizontally. The fault zones crosscut four different lithologies: limestone, intercalated marl and limestone, marl and sandstone. The internal architecture of the RFZ strongly depends on the lithology in which they developed. In the limestones, they consist of extension veins, stylolites, cataclasites and cemented gouge, in the intercalated marls and limestones of shear zones, brittle fractures and chaotic folds, in the marls of anastomosing shear zones, pressure solution seams and veins and in the sandstones of coarse breccia, brittle faults and extension veins. Sharp, discrete fault planes within the broader fault zones cross-cut all lithologies. Fossil fault zones in the Rezli area can act as a model for studying processes still occurring at deeper levels in this seismically active region.

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The 3D crustal structure of the Alps of eastern Switzerland and western Austria interpreted from a network of deep-seismic profiles

Hitz

1995

Tectonophysics

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The cover-basement contact beneath the Rawil axial depression (western Alps): True amplitude seismic processing, petrophysical properties, and modelling

Cited by 8 publications

References 10 publications

Hypocenter‐Based 3D Imaging of Active Faults: Method and Applications in the Southwestern Swiss Alps

Hypocenter‐Based 3D Imaging of Active Faults: Method and Applications in the Southwestern Swiss Alps

Brittle faulting in the Rawil depression: field observations from the Rezli fault zones, Helvetic nappes, Western Switzerland

The 3D crustal structure of the Alps of eastern Switzerland and western Austria interpreted from a network of deep-seismic profiles

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