EuCRUST‐07: A new reference model for the European crust

Tesauro, Magdala; Kaban, Mikhail K.; Cloetingh, S.A.P.L.

doi:10.1029/2007gl032244

Cited by 241 publications

(273 citation statements)

References 28 publications

(32 reference statements)

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“…The crustal thickness values are similar to other parts of the Variscan terranes in Europe (e.g. Tesauro et al 2008). These values, with an average for the area of ∼31 ± 2 km, are low for a collisional orogen (Artemieva & Meissner 2012) and insufficient to compensate the topography of ∼700 meters on average.…”

Section: Flat Moho In the South Of The Iberian Massifsupporting

confidence: 54%

Crustal thickness and images of the lithospheric discontinuities in the Gibraltar arc and surrounding areas

Mancilla

Stich

Morales

et al. 2015

Geophysical Journal International

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S U M M A R YThe Gibraltar arc and surrounding areas are a complex tectonic region and its tectonic evolution since Miocene is still under debate. Knowledge of its lithospheric structure will help to understand the mechanisms that produced extension and westward motion of the Alboran domain, simultaneously with NW-SE compression driven by Africa-Europe plates convergence. We perform a P-wave receiver function analysis in which we analyse new data recorded at 83 permanent and temporary seismic broad-band stations located in the South of the Iberian peninsula. These data are stacked and combined with data from a previous study in northern Morocco to build maps of thickness and average v P /v S ratio for the crust, and cross-sections to image the lithospheric discontinuities beneath the Gibraltar arc, the Betic and Rif Ranges and their Iberian and Moroccan forelands. Crustal thickness values show strong lateral variations in the southern Iberia peninsula, ranging from ∼19 to ∼46 km. The Variscan foreland is characterized by a relatively flat Moho at ∼31 km depth, and an average v P /v S ratio of ∼1.72, similar to other Variscan terranes, which may indicate that part of the lower crustal orogenic root was lost. The thickest crust is found at the contact between the Alboran domain and the External Zones of the Betic Range, while crustal thinning is observed southeastern Iberia (down to 19 km) and in the Guadalquivir basin where the thinning at the Iberian paleomargin could be still preserved. In the cross-sections, we see a strong change between the eastern Betics, where the Iberian crust underthrusts and couples to the Alboran crust, and the western Betics, where the underthrusting Iberian crust becomes partially delaminated and enters into the mantle. The structures largely mirror those on the Moroccan side where a similar detachment was observed in northern Morocco. We attribute a relatively shallow strong negativepolarity discontinuity to the lithosphere-asthenosphere boundary. This means relatively thin lithosphere ranging from ∼50 km thickness in southeastern Iberia and northeastern Morocco to ∼90-100 km beneath the western Betics and the Rif, with abrupt changes of ∼30 km under the central Betics and northern Morocco. Our observations support a geodynamic scenario where in western Betics oceanic subduction has developed into ongoing continental subduction/delamination while in eastern Betics this process is inactive.

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Section: Flat Moho In the South Of The Iberian Massifsupporting

confidence: 54%

Crustal thickness and images of the lithospheric discontinuities in the Gibraltar arc and surrounding areas

Mancilla

Stich

Morales

et al. 2015

Geophysical Journal International

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“…The high-resolution basement depth map from this paper is compared to three other maps of lower resolution: one global map (Laske and Masters 1997) and two regional maps (Molinari and Morelli 2011;Tesauro et al 2008). For a comparison of these maps and the map from our study, all are filtered and interpolated with the same 50-km boxcar filter (Fig.…”

Section: Seismic Basement: Resultsmentioning

confidence: 99%

“…c Difference between final basement map and basement depth by Molinari and Morelli (2011). d Difference between final basement map and basement depth by Tesauro et al (2008) Model (Michalak 2004) has to be included. The difference between the map from this study and the map by Laske and Masters (1997) is shown in Fig.…”

Section: Seismic Basement: Resultsmentioning

confidence: 99%

“…a Basement depth from boreholes limited to 4.5 km depth (Małolepszy 2005; see text for more explanation); white color shows area with no data. b Depth of the seismic basement in northeastern Poland (Skorupa 1974) and depth of the basement (high-conductivity layer) from magnetotelluric investigations in Carpathians in southern Poland (Stefaniuk and Klityński 2007). c Basement depth beneath seismic refraction profiles; for each point along the profiles, a mask of 20 km radius was used to plot the basement depth; the white color shows an area with no refraction data.…”

Section: Datamentioning

confidence: 99%

“…f Interpolated P-wave velocity of the uppermost basement from seismic refraction profiles; the dotted line ellipse shows the area of anomalous velocity (anisotropy) discussed in the text. The data in the map c are from modern seismic refraction experiments/profiles: POLONAISE'97: Guterch et al (1999); profile P1-Jansen et al boreholes by Stefaniuk and Klityński (2007). A proper mask for this map is calculated as having value 1 where data are available and value 0 elsewhere.…”

Section: Datamentioning

confidence: 99%

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Seismic basement in Poland

Grad

Polkowski

2015

Int J Earth Sci (Geol Rundsch)

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Vertical GPS ground motion rates in the Euro‐Mediterranean region: New evidence of velocity gradients at different spatial scales along the Nubia‐Eurasia plate boundary

Faccenna²,

et al. 2013

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[1] We use 2.5 to 14 years long position time series from >800 continuous Global Positioning System (GPS) stations to study vertical deformation rates in the Euro-Mediterranean region. We estimate and remove common mode errors in position time series using a principal component analysis, obtaining a significant gain in the signal-to-noise ratio of the displacements data. Following the results of a maximum likelihood estimation analysis, which gives a mean spectral index~À0.7, we adopt a power law + white noise stochastic model in estimating the final vertical rates and find 95% of the velocities within ±2 mm/yr, with uncertainties from filtered time series~40% smaller than from the unfiltered ones. We highlight the presence of statistically significant velocity gradients where the stations density is higher. We find undulations of the vertical velocity field at different spatial scales both in tectonically active regions, like eastern Alps, Apennines, and eastern Mediterranean, and in regions characterized by a low or negligible tectonic activity, like central Iberia and western Alps. A correlation between smooth vertical velocities and topographic features is apparent in many sectors of the study area. Glacial isostatic adjustment and weathering processes do not completely explain the measured rates, and a combination of active tectonics and deep-seated geodynamic processes must be invoked. Excluding areas where localized processes are likely, or where subduction processes may be active, mantle dynamics is the most likely process, but regional mantle modeling is required for a better understanding.

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EuCRUST‐07: A new reference model for the European crust

Cited by 241 publications

References 28 publications

Crustal thickness and images of the lithospheric discontinuities in the Gibraltar arc and surrounding areas

Crustal thickness and images of the lithospheric discontinuities in the Gibraltar arc and surrounding areas

Seismic basement in Poland

Vertical GPS ground motion rates in the Euro‐Mediterranean region: New evidence of velocity gradients at different spatial scales along the Nubia‐Eurasia plate boundary

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