Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8526
Authors: | Carafa, M. M. C.* Barba, S.* |
Title: | The stress field in Europe: optimal orientations with confidence limits | Other Titles: | Stress in Europe with confidence limits | Journal: | Geophysical Journal International | Publisher: | Wiley-Blackwell | Issue Date: | 2013 | DOI: | 10.1093/gji/ggt024 | URL: | http://gji.oxfordjournals.org/content/early/2013/02/19/gji.ggt024.abstract | Keywords: | Neotectonics Seismicity and tectonics Fractures and faults Intra-plate processes Plate motions Dynamics: gravity and tectonics |
Subject Classification: | 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations 04. Solid Earth::04.04. Geology::04.04.09. Structural geology 04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress 05. General::05.02. Data dissemination::05.02.99. General or miscellaneous |
Abstract: | In this study, we modify and extend a data analysis technique to determine the stress orientations between data clusters by adding an additional constraint governing the probability algorithm. We apply this technique to produce a map of the maximum horizontal compressive stress (S_Hmax) orientations in the greater European region (including Europe, Turkey and Mediterranean Africa). Using the World Stress Map dataset release 2008, we obtain analytical probability distributions of the directional differences as a function of the angular distance, θ. We then multiply the probability distributions that are based on pre-averaged data within θ<3° of the interpolation point and determine the maximum likelihood estimate of the S_Hmax orientation. At a given distance, the probability of obtaining a particular discrepancy decreases exponentially with discrepancy. By exploiting this feature observed in the World Stress Map release 2008 dataset, we increase the robustness of our S_Hmax determinations. For a reliable determination of the most likely S_Hmax orientation, we require that 90% confidence limits be less than ±60° and a minimum of three clusters, which is achieved for 57% of the study area, with small uncertainties of less than ±10° for 7% of the area. When the data density exceeds 0.8×10^-3 data/km2, our method provides a means of reproducing significant local patterns in the stress field. Several mountain ranges in the Mediterranean display 90° changes in the S_Hmax orientation from their crests (which often experience normal faulting) and their foothills (which often experience thrust faulting). This pattern constrains the tectonic stresses to a magnitude similar to that of the topographic stresses. | Description: | This article has been accepted for publication in Geophysical Journal International ©: The Authors 2003. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Geophys. J. Int.-2013-Carafa-Barba_dowloadable.pdf | Main article - downloadable final draft | 3.25 MB | Adobe PDF | View/Open |
Geophys. J. Int.-2013-Carafa-Barba_publisher_pdf.pdf | Main article - publisher pdf (restricted access) | 9.11 MB | Adobe PDF | View/Open |
readme_supplementary_files.txt | Supplementary files - readme | 1.88 kB | Text | View/Open |
Figure_S1.pdf | Supplementary files - Figure S1 | 555.89 kB | Adobe PDF | View/Open |
Table_S1.zip | Supplementary files - Table S1 (csv zip) | 743.69 kB | ZIP | View/Open |
Table_S1.csv.gz | Supplementary files - Table S1 (csv gz) | 743.57 kB | gzip | View/Open |
CarafaBarba_ggt024_SupplementaryFiles.zip | Supplementary files - Figure S1 and Table S1 | 2 MB | ZIP | View/Open |
CarafaBarba_ggt024_kmz_GoogleEarth.zip | Supplementary files - Google Earth kmz | 2.51 MB | kmz (Google Earth) | View/Open |
CarafaBarba_ggt024_mapinfo.zip | Supplementary files - Mapinfo | 9.94 MB | Mapinfo | View/Open |
CarafaBarba_ggt024_Autocad-DXF.zip | Supplementary files - Autocad DXF | 3.94 MB | Autocad DXF | View/Open |
CarafaBarba_ggt024_mif-mid.zip | Supplementary files - Mapinfo (mif mid) | 4.26 MB | Mapinfo (mif mid) | View/Open |
CarafaBarba_ggt024_ESRI-shp.zip | Supplementary files - Esri Arcgis | 8.59 MB | SHP (ESRI Arcgis) | View/Open |
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