Crustal motion results derived from observations in the European geodetic VLBI network

Haas, Rüdiger; Gueguen, E.; Scherneck, Hans‐Georg; Nothnagel, A.; Campbell, James

doi:10.1186/bf03352278

Cited by 24 publications

(13 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Geodetic VLBI observations in Europe, including the VLBI station of Madrid, have been performed on a regular basis since the early 1990s. They indicate a negligible velocity of Madrid with respect to Wettzel, located on stable Europe (0.1 ± 0.3 mm/yr; HAAS et al, 2000). The analysis of the ITRF2000 velocity field, that includes these VLBI measurements, confirms this result (Fig.…”

Section: The Iberian Peninsulasupporting

confidence: 74%

Geodetic Measurements of Crustal Deformation in the Western Mediterranean and Europe

Nocquet

Calais²

2004

Pure and Applied Geophysics

310

154

View full text Add to dashboard Cite

Geodetic measurements of crustal deformation over large areas deforming at slow rates (<5 mm/yr over more than 1000 km), such as the Western Mediterranean and Western Europe, are still a challenge because (1) these rates are close to the current resolution of the geodetic techniques, (2) inaccuracies in the reference frame implementation may be on the same order as the tectonic velocities. We present a new velocity field for Western Europe and the Western Mediterranean derived from a rigorous combination of (1) a selection of sites from the ITRF2000 solution, (2) a subset of sites from the European Permanent GPS Network solution, (3) a solution of the French national geodetic permanent GPS network (RGP), and (4) a solution of a permanent GPS network in the western Alps (REGAL). The resulting velocity field describes horizontal crustal motion at 64 sites in Western Europe with an accuracy on the order of 1 mm/yr or better. Its analysis shows that Central Europe behaves rigidly at a 0.4 mm/yr level and can therefore be used to define a stable Europe reference frame. In that reference frame, we find that most of Europe, including areas west of the Rhine graben, the Iberian peninsula, the Ligurian basin and the Corsica-Sardinian block behaves rigidly at a 0.5 mm/yr level. In a second step, we map recently published geodetic results in the reference frame previously defined. Geodetic data confirm a counterclockwise rotation of the Adriatic microplate with respect to stable Europe, that appears to control the strain pattern along its boundaries. Active deformation in the Alps, Apennines, and Dinarides is probably driven by the independent motion of the Adriatic plate rather than by the Africa-Eurasia convergence. The analysis of a global GPS solution and recently published new estimates for the African plate kinematics indicate that the Africa-Eurasia plate motion may be significantly different from the NUVEL1A values. In particular, geodetic solutions show that the convergence rate between Africa and stable Europe may be 30-60% slower than the NUVEL1A prediction and rotated 10-30°counterclockwise in the Mediterranean.

show abstract

Section: The Iberian Peninsulasupporting

confidence: 74%

Geodetic Measurements of Crustal Deformation in the Western Mediterranean and Europe

Nocquet

Calais²

2004

Pure and Applied Geophysics

310

154

View full text Add to dashboard Cite

show abstract

“…Nevertheless, evidence for younger tectonics includes the occurrence of Quaternary volcanism and thermal springs along N-S regional faults in the northern part of Spitsbergen (SKJELKVALE et al 1989;VÅ GNES and AMUNDSEN 1993;HJELLE et al 1999) and the existence of moderate to strong magnitude earthquakes (MITCHELL et al 1990). GUEGUEN et al (2003) and KUMAR and SINGH (2012) have found in the NW Svalbard (Ny Å lesund) an uplift rate from geodetic measurements (above 6 mm/year) higher than those predicted by post-glacial rebound models (lower than 2 mm/year, MITROVICA et al 1994;SOUDARIN et al 1999;HAAS et al 2000), and suggested a tectonic contribution related to active/recent faults in the Brøggerhalvøya.…”

Section: Geological and Tectonic Settingmentioning

confidence: 99%

Lineament Domain of Regional Strike-Slip Corridor: Insight from the Neogene Transtensional De Geer Transform Fault in NW Spitsbergen

Cianfarra

Salvini

2014

Pure Appl. Geophys.

View full text Add to dashboard Cite

Abstract-Lineaments on regional scale images represent controversial features in tectonic studies. Published models explain the presence of the lineament domains in most geodynamic environments as resulting from the enhanced erosion along strikes normal to the upper crustal regional extension. Despite their success in many tectonic frameworks, these models fail to explain the existing lineament domains in the regional strike-slip corridors that separate regional blocks, including the transform faults. The present paper investigates the lineament distribution in such environments, and specifically presents the results from a study along the shear corridor of the De Geer Transform Fault in the North Atlantic, responsible for the separation and drifting away between Northern Greenland and the Svalbard Archipelago since Oligocene times. The study spans from satellite image analysis and outcrop scale investigations to a more regional analysis on a digital bathymetric model of the North Atlantic-Arctic Ocean. Lineaments were automatically detected in the spectral band 8 (0.52-0.9 lm) of a Landsat 7 image (15 m/pixel resolution). A total of 320 image lineaments were extracted from both the regional and the local scale investigations and statistically analyzed. Results from the multi-scalar lineament analyses revealed the existence of a main N-S lineament domain regionally persistent from the De Geer corridor to the western margin of northern Spitsbergen where it relates to the youngest, post-Oligocene, tectonics observed onshore. This is confirmed by field observations showing that the N-S faults represent the youngest brittle deformation system and systematically cut the deformations associated with the building of the Tertiary West Spitsbergen fold and thrust belt. The N-S lineament domain is the result of the activity of a larger, regional scale tectonic feature, NW-SE oriented and responsible for the localized extension within its deformation corridor, the De Geer Transform Fault. A model is presented that involves the presence of a thin upper crust with brittle behavior lying above a deeper crustal layer characterized by a more ductile deformation. The lower layer suffers more diffuse, homogeneous strain. This strain is transmitted to the upper brittle layer, forming clusters of enhanced fracturing zones aligned following the induced stress trajectories. Lineaments develop along these weaker fractured zones, preferentially etched by erosional processes, and align perpendicular to the least horizontal compression (sigma3), which in turn forms an angle to the shear kinematics. In the western part of Spitsbergen, this angle is smaller than 45°due to the transtensional tectonic regime. The proposed model for lineament domain origin in strike-slip environments well integrates the existing models in literature and could be applied to other similar geodynamic contests.

show abstract

“…Many space geodetic techniques have the sensitivity to recover horizontal deformation components due to post-glacial rebound (James and Lambert, 1993;Mitrovica et al, 1993;Argus et al, 1999;Campbell and Nothnagel, 2000;Haas et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

BIFROST project: 3-D crustal deformation rates derived from GPS confirm postglacial rebound in Fennoscandia

et al. 2014

Self Cite

View full text Add to dashboard Cite

Since autumn 1993 the BIFROST project has provided daily GPS solutions of geodetic positions from a network of more than 40 stations covering a large area of the Baltic shield. This area is expected to show large vertical motion due to glacial isostatic rebound following the deglaciation at the end of the Pleistocene. This paper will discuss the inference of three-dimensional rates of crustal motion at the GPS stations with respect to (1) a plate-fixed average for the horizontal components; (2) a geocentric reference in order to infer absolute changes of sea level from vertical crustal motion and models of geoidal rebound. We show that the horizontal strain rate pattern is largely dominated by unilateral extension and not exhibiting horizontal shear to an important extent. In regard to the vertical motion a crucial issue is the stability of the geocentre in the GPS frame. We show results from an Empirical Orthogonal Function analysis that attenuates regionally correlated noise. In all components our observations suggest reasonably close agreement with forward computions on the basis of postglacial isostatic adjustment. A dominant tectonic signal would lead to a certain fraction of the batch of baselines to exhibit shortening. A tectonic process leading to a similar pattern of horizontal motion as expected from postglacial rebound can safely be dismissed in the context of the currently accepted plate tectonic setting. Thus, our baseline rate comparison will be a critical first order test of the prevailing style of deformation.

show abstract

Crustal motion results derived from observations in the European geodetic VLBI network

Cited by 24 publications

References 14 publications

Geodetic Measurements of Crustal Deformation in the Western Mediterranean and Europe

Geodetic Measurements of Crustal Deformation in the Western Mediterranean and Europe

Lineament Domain of Regional Strike-Slip Corridor: Insight from the Neogene Transtensional De Geer Transform Fault in NW Spitsbergen

BIFROST project: 3-D crustal deformation rates derived from GPS confirm postglacial rebound in Fennoscandia

Contact Info

Product

Resources

About