English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. The cross-correlation of ambient noise records registered by seismic networks has proven to be a valuable tool to obtain new insights into thecrustal structure at different scales. Based on 2 to 14 s period Rayleigh and Love dispersion data extracted from the seismic ambient noiserecorded by 20 three-component broadband stations belonging to two different temporary experiments, we present the first (i) upper-crustal(1–12 km) high-resolution shear wave velocity and (ii) radial anisotropy variation models of the continental crust in NW Iberia. The areaof study represents one of the best-exposed cross sections along the Variscan orogen of western Europe, showing the transition between the externaleastern zones towards the internal areas in the west. Both the 2-D maps and an E–W transect reveal a close correspondence with the main geologicaldomains of the Variscan orogen. The foreland fold-and-thrust belt of the orogen, the Cantabrian Zone, is revealed by a zone of relatively low shearwave velocities (2.3–3.0 km s−1), while the internal zones generally display higher homogeneous velocities(&gt; 3.1 km s−1). The boundary between the two zones is clearly delineated in the models, depicting the arcuate shape of the orogenicbelt. The velocity patterns also reveal variations of the elastic properties of the upper crust that can be linked to major Variscan structures,such as the basal detachment of the Cantabrian Zone, the stack of nappes involving pre-Variscan basement, or sedimentary features such as thepresence of thick syn-orogenic siliciclastic wedges. Overall, the radial anisotropy magnitude varies between −5 % and 15 % and increaseswith depth. The depth pattern suggests that the alignment of cracks is the main source of anisotropy at &lt; 8 km depths, although theintrinsic anisotropy seems to be significant in the West Asturian–Leonese Zone, the low-grade slate belt adjacent to the Cantabrian Zone. Atdepths &gt; 8 km, widespread high and positive radial anisotropies are observed, which we attribute to the presence of subhorizontalalignments of grains and minerals in relation to the pre- or syn-orogenic deformation associated with the Variscan orogenesis.

Radial anisotropy and S-wave velocity depict the internal to external zone transition within the Variscan orogen (NW Iberia)