Reviewing pre-TRANSALP DSS models

Cassinis, R.

doi:10.1016/j.tecto.2005.10.026

Cited by 27 publications

(15 citation statements)

References 8 publications

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“…Moreover, the amplified frequencies obtained by the spectral analyses agree well with both the assumed thickness of sediments reported in Figure 1 (e.g., Cassano et al, 1986;Ambrosetti et al, 1987;Doglioni, 1993) and the crustal model derived for the area through the interpretation of deep seismic soundings (Pieri and Groppi, 1981;Cassinis, 2006). The model provides shear-wave velocities in the first 3 km (maximum depth corresponding to the available stations) which range from 0.6 to 1:2 km=s (see also Vuan et al, 2011).…”

Section: Discussionsupporting

confidence: 82%

“…The global map in the top left inset shows the epicenter of the 11 March 2011 M w 9.0 Tohoku-Oki, Japan, earthquake (gray star) and the position of the investigated area (black rectangle). (b) The contour lines indicate the thickness of the Po Basin sediments (Pieri and Groppi, 1981;Cassinis, 2006). The black dashed lines AA 0 and BB 0 in (a) indicate the transverse sections reported in (c), obtained from Cassano et al (1986) and Livio et al (2009). Parma event (Fig.…”

Section: Target Area: the Po Plainmentioning

confidence: 94%

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Teleseisms as Estimators of Experimental Long-Period Site Amplification: Application to the Po Plain (Italy) for the 2011 Mw 9.0 Tohoku-Oki (Japan) Earthquake

Massa

Augliera

2013

Bulletin of the Seismological Society of America

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This study focuses on the evaluation of teleseisms as estimators of long-period seismic site amplification in correspondence to large alluvial basins. Using the recordings of the 11 March 2011 M w 9.0 Tohoku-Oki, Japan, earthquake, the site response at low frequency of the Po Plain, Italy, was investigated. The interdistances among the analyzed sites, compared to the travel paths of the Tohoku-Oki waveforms with respect to the target area, allowed us to investigate the reliability of the standard spectral ratio (SSR) technique applied to teleseismic recordings. The results are presented as directional SSRs calculated considering 2 min of P, S, and Rayleigh (LR) waves, filtered from 0.025 to 1.0 Hz. Considering the horizontal components, at frequency from 0.04 to 0.3 Hz, the Po Plain stations show amplification factors up to 20 and 16, detected for the S and LR phases, respectively. In some cases, the amplified ground motion appeared to be affected by polarization phenomena, in particular in the north-south direction. Moving from the center to the edge of the basin, the LR-wave amplification remarkably decreases, in particular for frequencies between 0.1 and 0.3 Hz; this was not observed for the S wave. Amplification factors > 10 were also detected for the vertical component, with increasing resonance periods moving from P to LR waves. Comparing SSRs with the single-station horizontal-tovertical spectral ratios, the latter case shows that the vertical amplifications lead to the partial masking of the actual response of a site, in particular for frequencies > 0:15 Hz. Finally, the relative P-wave amplitudes were also investigated. The results of the spectral analysis and the correlation between the relative P-wave amplitudes and the geometry of the bedrock suggest that the proposed approach is appropriate for the investigation of long-period seismic site response in similar settings.

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Section: Discussionsupporting

confidence: 82%

Section: Target Area: the Po Plainmentioning

confidence: 94%

Teleseisms as Estimators of Experimental Long-Period Site Amplification: Application to the Po Plain (Italy) for the 2011 Mw 9.0 Tohoku-Oki (Japan) Earthquake

Massa

Augliera

2013

Bulletin of the Seismological Society of America

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“…For simplicity, we only consider the shallower crustal root option (~60 km depth), since this is the preferred model by Pedreira et al (2015). Similar Moho-depth values are locally found in several Alpine orogens like Eastern Alps (60 km; Cassinis, 2006), Zagros (56-69 km; Paul et al, 2010), Pyrenees (55-70 km; Chevrot et al, 2015), and Rif (N55 km, Mancilla and Diaz, in this volume). See also Artemieva and Thybo (2013) for a European Moho compilation.…”

Section: Crustal Geometry From Previous Studiesmentioning

confidence: 74%

From the North-Iberian Margin to the Alboran Basin: A lithosphere geo-transect across the Iberian Plate

et al. 2015

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“…Ebbing et al 2001) and seismic data (Cassinis 2006;Giese and Buness 1992;Waldhauser et al 1998;Waldhauser et al 2002;Ziegler and Dèzes 2007, for compilation) do not point to a significant change of depth of the Moho below the Brenner Fault (Fig. 6).…”

Section: Surface Topography and Geometry Of The Moho Across The Brennmentioning

confidence: 90%

“…c Modified after Waldhauser et al (2002); Ziegler and Dèzes (2007). d Modified from Cassinis (2006) (Kummerow et al 2004;Schmid et al 2004) indicate that the Moho attains almost 50 km below the Tauern Window, suggesting that extension cannot have been very significant.…”

Section: Surface Topography and Geometry Of The Moho Across The Brennmentioning

confidence: 99%

Estimating displacement along the Brenner Fault and orogen-parallel extension in the Eastern Alps

Rosenberg

García

2011

Int J Earth Sci (Geol Rundsch)

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The major structure accommodating orogenparallel extension in the Eastern Alps is inferred to be the Brenner Fault, which forms the western boundary of the Tauern Window. The estimated amount of extension along this fault varies from a minimum of 10-20 km to a maximum of [70 km. All investigations that have attempted to constrain this amount of extension have calculated the fault plane parallel displacement required to restore the difference in structural level between footwall and hanging wall as constrained by geobarometry. However, these calculations neglected the component of exhumation of the footwall resulting from folding and erosion. Therefore, the total amount of extensional displacement was systematically overestimated. In the present study, we project a tectonic marker surface from the footwall and hanging wall of the Brenner Fault onto a N-S-striking cross section. This marker surface, which is the base of the Patscherkofel unit in the footwall and the base of the Ö tztal basement in the hanging wall, is inferred to have occupied the same structural level in the hanging wall and footwall of the Brenner Fault before its activity. Therefore, the difference in height between the marker projected from the footwall and from the hanging wall is a measure of the vertical offset across the Brenner Fault. This construction shows that the vertical offset of the marker horizon on both sides of the Brenner Fault varies strongly and continuously along strike of the Brenner Fault, attaining a maximum value of 15 km at the hinge of the folded footwall (Tauern Dome). The along-strike change of vertical offset is explained by large-scale upright folding of the footwall that did not affect the hanging wall of the Brenner Fault. Therefore, the difference in vertical offset of 10 km between the area of the Brenner Pass and the area immediately south of Innsbruck corresponds to the shortening (upright folding) component of exhumation of the footwall. The remaining 5 km of vertical offset must be attributed to extensional deformation. The Brenner Fault itself is barely folded, its dip varies between 20 and 70°, and it crosscuts the upright folds of the western Tauern Window. Given the offset of 5 km, the dip of the fault constrains the extensional displacement to be between 2 and 14 km. We conclude that the Tauern Window was exhumed primarily by folding and erosion, not by extensional unroofing.

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Reviewing pre-TRANSALP DSS models

Cited by 27 publications

References 8 publications

Teleseisms as Estimators of Experimental Long-Period Site Amplification: Application to the Po Plain (Italy) for the 2011 Mw 9.0 Tohoku-Oki (Japan) Earthquake

Teleseisms as Estimators of Experimental Long-Period Site Amplification: Application to the Po Plain (Italy) for the 2011 Mw 9.0 Tohoku-Oki (Japan) Earthquake

From the North-Iberian Margin to the Alboran Basin: A lithosphere geo-transect across the Iberian Plate

Estimating displacement along the Brenner Fault and orogen-parallel extension in the Eastern Alps

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