the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Seismo-tectonics of Greater Iberia: An updated review
Abstract. From the analysis of 542 moment tensor focal mechanisms in Iberia, active tectonic deformations and stresses were inferred by implementing different and complementary methodologies: FMC classification of the rupture type; composed focal mechanism based on the average seismic moment tensor; rotation angle between tensors estimates; Right Dihedra composed focal mechanisms; Slip Model analysis to determine the strain conditions and classical stress inversion methodology. By using the Slip Model results and considering the tectonic constraints of the Cenozoic deformation in Iberia, the study region was subdivided into a series of zones where the different methods were individually applied. The results indicate that thrust faulting stress regimes are active in the Gorringe-Horseshoe area and the easternmost Tell Atlas. In the south, most of the zones are transpressive, as well as in the southwestern corner of Iberia, south of Lisbon. The exception is the Granada Basin, which displays an almost radial normal faulting stress regime. Normal faulting stresses are dominant in the Pyrenees and in the Mediterranean rim, north of the Betics. In the central part of the Pyrenees, we find a maximum horizontal extension perpendicular to the range, indicating that local stresses related to post-orogenic collapse or isostatic rebound dominate over regional ones. The maximum horizontal compression along the Eurasia-Africa plate limit is very homogeneously close to N154° E, except in some parts of the Betics that are probably influenced by a remanent effect of the Alboran Slab. In the Central Ranges and offshore Atlantic, the maximum horizontal compression is slightly rotated anticlockwise to N140° E.
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Status: open (until 08 Mar 2025)
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RC1: 'Comment on egusphere-2024-4126', A. M. Casas, 30 Jan 2025
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The paper by Olaiz et al presents a recopilation of a large quantityt of data, that will contribute to the understanding of the recent or rather present-day tectonics of Iberia (whether greater or not, I think that the term greater could be kept for the sector limited by the ancient plate boundaries, let's say the mid-Atlantic ridge on one side an Sicily-Calabria on the other). The selection of data is good and therefore I think that the discussion and conclusions presented are well founded on these data. The presentation is of very good quality, and all in all the paper will contribute to the knowledge of this particular sector, sometimes with controversial interpretations, of the European-African plate boundary. My only remarks are related to formal issues. These include the use of toponyms that are of common knowledge for the researchers who work in the Iberian plate, but not for the rest. I do not know in which way they could be made undestandable (and localized for the whole scientific community. Maybe a table with the location of the different features referred to in the text or their location in the map. Another possibility is to reduce the number of geographical/geological names but this is not so good a solution, in my opinion. Other minor issues are related to the use of Tertiary for Cenozoic of some gramatical or typographic errors (suggests in line 165, Gorring instead of Gorringe, etc...). I also suggest the authors to revise carefully the use of subscripts because sometimes the names of the stress axes and other variables are difficult to distinguish within the text.
Citation: https://doi.org/10.5194/egusphere-2024-4126-RC1 -
AC1: 'Reply on RC1', Antonio Olaiz, 03 Feb 2025
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Dear Dr. Casas,
Thank you for your comments. We are enhancing the geographical information to make it easier for readers to follow the manuscript. We also appreciate your efforts in identifying grammatical and typographical errors, as well as issues with subscripts. These will be reviewed before the final submission
Citation: https://doi.org/10.5194/egusphere-2024-4126-AC1
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AC1: 'Reply on RC1', Antonio Olaiz, 03 Feb 2025
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