IMAGE-D4.04: Final Report on Estimating crustal stress and fracture permeability
This document summarizes the results of Task 4.4 that consists of the analysis of crustal stressdata and data of the fracture permeability for Iceland. This is the final report of the status of dataanalysis and compilation. In addition to an increase in data records the report provides theintegratio...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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Zenodo
2017
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| Online Access: | https://doi.org/10.5281/zenodo.1256393 |
| Summary: | This document summarizes the results of Task 4.4 that consists of the analysis of crustal stressdata and data of the fracture permeability for Iceland. This is the final report of the status of dataanalysis and compilation. In addition to an increase in data records the report provides theintegration of the findings presented in the preliminary report (IMAGE-D4.08) into a wider context. The stress data analysis of image log data from 51 boreholes in Iceland has been performed and issummarized in the preliminary report. For the final report the number of data records was furtherincreased by including also data from earthquake focal mechanism and geological indicators. Thefinal result is a stress database for Iceland with ten times more data records on the stress statethan previously available (increase from 38 to 485 data records) and enabled us to analyse indetail the stress pattern of whole Iceland and to identify distinct stress provinces. The results arepublished in the peer-reviewed journal Tectonophysics (Ziegler et al., 2016a; Appendix A) and in anew comprehensive stress map of Iceland (Ziegler et al., 2016b; Appendix B). The study of fracture permeability’s has been performed through original field studies carried out inGeitafell (Iceland) the field area chosen as analogue of the presently active geothermal systems ofKrafla presented in the preliminary report and in the Skagafjör›ur area. The obtained results are inagreement with data from literature and direct measurements in boreholes. Furthermore the data isan extension to the stress database. FP7 |
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