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| Titel |
The Hydrorift Experiment |
| VerfasserIn |
S. Kristjansdottir, K. Agustsson, A. Franco, M. Adelinet, K. Arnason, C. Dorbath, C. Doubre, O. G. Flovenz, J. Fortin, L. Geoffroy, G. P. Hersir, R. Karlsdottir, A. Schubnel, A. M. Vilhjálmsson |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250065335
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| Zusammenfassung |
| The HYDRORIFT experiment involves ISOR (Iceland GeoSurvey), the energy company HS
Orka and a group of French GEOFLUX scientists in a geophysical experiment on the
Reykjanes Peninsula (RP) in Iceland. It includes high-resolution TEM/MT resistivity studies,
seismic tomography and general analysis of seismic data. The objective is to get a better idea
of velocity anomalies discovered in the Krýsuvík area (central RP) following an experiment
in 2005, resulting in a more accurate physical knowledge of the geometry and time-evolution
of the different reservoirs within the active rift zone in Iceland. Understanding the
behavior of fluids in the deep upper crust and at the brittle/ductile crust transition is
of importance in both academic and industrial fields. Pore fluids are thought to
play a major role in the seismic cycle, mainly by decreasing friction along major
faults.
For the purpose of gathering data, an array of thirty seismic stations, including three
broadband seismometers, was deployed in the Krýsuvík area in May to October 2009.
During the operation period of the network an intense seismic swarm occurred in
the region, located mainly within the network. The swarm gives a good insight
into the processes at the plate boundary in the area, such as the stress field and
the stress release. Furthermore, prerequisites for detailed tomographic analysis
existed as well as dense magneto-telluric and transient electromagnetic (MT/TEM)
soundings had been made in the area. Comparative analysis of the seismic velocity
distribution from seismic tomography and 3D interpretation of resistivity from MT/TEM
soundings may shed light on the physical conditions of the rock and pore fluids at depth. |
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