EUNAseis: A seismic model for Moho and crustal structure in Europe, Greenland, and the North Atlantic region

Artemieva, Irina; Thybo, Hans

doi:10.1016/j.tecto.2013.08.004

Cited by 144 publications

(137 citation statements)

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“…The deeper parts of shield crust are characterized by relatively high P-wave velocity (>7 km s −1 ) (cf. Artemieva & Thybo 2013) and high density .…”

Section: Previous Studiesmentioning

confidence: 99%

“…Crustal velocity and thickness are mainly determined by seismic refraction experiments and by analyses of receiver functions (EUGENO-S Working Group 1988; Iwasaki et al 1994;Svenningsen et al 2007;Olsson et al 2008;Sandrin & Thybo 2008;Stratford et al 2009;Stratford & Thybo 2011;. For a recent compilation and analysis, see Artemieva & Thybo (2013). The typical thickness of shield crust in southern Sweden is around 45 km (range about 40-50 km), which contrasts with the significantly thinner crust of about 30 km across the Danish and North German Basins.…”

Section: Previous Studiesmentioning

confidence: 99%

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Upper-mantleP- andS-wave velocities across the Northern Tornquist Zone from traveltime tomography

et al. 2015

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S U M M A R YThis study presents P-and S-wave velocity variations for the upper mantle in southern Scandinavia and northern Germany based on teleseismic traveltime tomography. Tectonically, this region includes the entire northern part of the prominent Tornquist Zone which follows along the transition from old Precambrian shield units to the east to younger Phanerozoic deep sedimentary basins to the southwest. We combine data from several separate temporary arrays/profiles (276 stations) deployed over a period of about 15 yr and permanent networks (31 stations) covering the areas of Denmark, northern Germany, southern Sweden and southern Norway. By performing an integrated P-and S-traveltime analysis, we obtain the first high-resolution combined 3-D V P and V S models, including variations in the V P /V S ratio, for the whole of this region of study. Relative station mean traveltime residuals vary within ±1 s for P wave and ±2 s for S wave, with early arrivals in shield areas of southern Sweden and later arrivals in the Danish and North German Basins, as well as in most of southern Norway. In good accordance with previous, mainly P-velocity models, a marked upper-mantle velocity boundary (UMVB) is accurately delineated between shield areas (with high seismic mantle velocity) and basins (with lower velocity). It continues northwards into southern Norway near the Oslo Graben area and further north across the Southern Scandes Mountains. This main boundary, extending to a depth of at least 300 km, is even more pronounced in our new S-velocity model, with velocity contrasts of up to ±2-3 per cent. It is also clearly reflected in the V P /V S ratio. Differences in this ratio of up to about ±2 per cent are observed across the boundary, with generally low values in shield areas to the east and relatively higher values in basin areas to the southwest and in most of southern Norway. Differences in the V P /V S ratio are believed to be a rather robust indicator of upper-mantle compositional differences. For the depth interval of about 100-300 km, thick, depleted, relatively cold shield lithosphere is indicated in southern Sweden, contrasting with more fertile, warm mantle asthenosphere beneath most of the basins in Denmark and northern Germany. Both compositional and temperature differences seem to play a significant role in explaining the UMVB between southern Norway and southern Sweden. In addition to the main regional upper-mantle velocity contrasts, a number of more local anomaly features are also outlined and discussed.

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“…The deeper parts of shield crust are characterized by relatively high P-wave velocity (>7 km s −1 ) (cf. Artemieva & Thybo 2013) and high density .…”

Section: Previous Studiesmentioning

confidence: 99%

Section: Previous Studiesmentioning

confidence: 99%

Upper-mantleP- andS-wave velocities across the Northern Tornquist Zone from traveltime tomography

et al. 2015

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“…1), the result of enhanced melting in the Iceland plume (White & McKenzie 1995;Staples et al 1997). Most of the NE Atlantic Ocean has shallower bathymetry and hotter mantle when compared to other oceans (Parkin & White 2008;Artemieva & Thybo 2013).…”

mentioning

confidence: 99%

“…The first-order structure of the crust can be recognized by regional mapping of the Moho and basement depth. A number of maps already exist for the region, such as the global model CRUST1.0 of Laske et al (2013) or the model for the North Atlantic region by Artemieva & Thybo (2013). In addition, large parts of the region are included in compilations that cover the European plate (Grad et al 2009;Molinari & Morelli 2011).…”

mentioning

confidence: 99%

Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions

Funck

Geissler

Kimbell

et al. 2016

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Seismic refraction data and results from receiver functions were used to compile the depth to the basement and Moho in the NE Atlantic Ocean. For interpolation between the unevenly spaced data points, the kriging technique was used. Free-air gravity data were used as constraints in the kriging process for the basement. That way, structures with little or no seismic coverage are still presented on the basement map, in particular the basins off East Greenland. The rift basins off NW Europe are mapped as a continuous zone with basement depths of between 5 and 15 km. Maximum basement depths off NE Greenland are 8 km, but these are probably underestimated. Plate reconstructions for Chron C24 (c. 54 Ma) suggest that the poorly known Ammassalik Basin off SE Greenland may correlate with the northern termination of the Hatton Basin at the conjugate margin. The most prominent feature on the Moho map is the Greenland-Iceland-Faroe Ridge, with Moho depths .28 km. Crustal thickness is compiled from the Moho and basement depths. The oceanic crust displays an increased thickness close to the volcanic margins affected by the Iceland plume.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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“…area is approximately 2~4 km, and the thickness of the upper-middle crust is roughly 15~20 km (Artemieva and Thybo 2013). Thus, the first four layers (layer1, layer2, layer3 and layer4) locate between the sediments and upper-middle …”

Section: Key Parameters Of Poisson Waveletsmentioning

confidence: 99%

A multilayer approach and its application in modeling QGNSea V1.0: a local gravmetric quasi-geoid model over the North Sea

Luo

Zhong

et al. 2018

Preprint

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Abstract:A multilayer approach is set up for local gravity field modeling based on the idea of multi-resolution representation merging heterogeneous gravity data. Different layers of Poisson wavelets' grids are formed to recover the signals at various levels, where the shallow and deep layers mainly capture the short-and long-wavelength signals, respectively. The depths of these layers beneath the topography are linked to the locations that the anomaly sources locate, estimated by the wavelet decomposition and power spectrum analysis. For testing the performance of this 15 approach, a gravimetric quasi-geoid over the North Sea in Europe called QGNSea V1.0 is computed and compared with other existing models. The results show that the multilayer approach outperforms the traditionally used single-layer one in high-frequency bands, and the former fit the gravity data better, especially in regions with a tendency toward topographical variation. The evaluation with GPS/leveling data show the accuracies of QGNSea V1.0 modeled from the multilayer approach are improved by 0.3 cm, 0.6 cm and 0.8 cm in the Netherlands, Belgium and 20 parts of Germany, respectively, compared to the original solution computed from the single-layer approach. Further validation with existing models show QGNSea V1.0 has the best quality, which may be beneficial for studying the ocean circulation between the North Sea and neighbouring waters.

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EUNAseis: A seismic model for Moho and crustal structure in Europe, Greenland, and the North Atlantic region

Cited by 144 publications

References 428 publications

Upper-mantleP- andS-wave velocities across the Northern Tornquist Zone from traveltime tomography

Upper-mantleP- andS-wave velocities across the Northern Tornquist Zone from traveltime tomography

Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions

A multilayer approach and its application in modeling QGNSea V1.0: a local gravmetric quasi-geoid model over the North Sea

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