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  • 11. Symposium "Tektonik, Struktur- und Kristallingeologie" , 2006-03
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Discrimination of different volcanic rock units by magnetic properties — geothermal field at Reykjanes peninsula (SW-Iceland)

Vahle, C.
Kontny, A.ORCIDiD
Dietze, F.
Audunsson, H.
2006
Universitätsverlag Göttingen
Article in Anthology
Verlagsversion
Deutsch
11. Symposium "Tektonik, Struktur- und Kristallingeologie"
DOI: https://doi.org/10.23689/fidgeo-1915
Vahle, C.; Kontny, A.; Dietze, F.; Audunsson, H., 2006: Discrimination of different volcanic rock units by magnetic properties — geothermal field at Reykjanes peninsula (SW-Iceland). In: Philipp, S.; Leiss, B; Vollbrecht, A.; Tanner, D.; Gudmundsson, A. (eds.): 11. Symposium "Tektonik, Struktur- und Kristallingeologie"; 2006, Univ.-Verl. Göttingen, p. 238 - 239., , DOI: 10.23689/fidgeo-1915.
 
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  • Abstract
The geothermal field at Reykjanes peninsula is located at the boundary where the submarine Reykjanes Ridge passes over into the rift zone of southwestern Iceland. The geothermal field coincides with a magnetic low in the aeromagnetic anomaly map and is situated within a dense NE–SW fissure and fault zone. Surface geology is characterized by different historic fissure eruptions (youngest from 1226AD), shield lava (12.5–14.5 ka) and intercalated pillow basalt–hyaloclastite ridges probably formed during the last glacial episode (14.5–20 ka). During a field magnetic study in the vicinity of the geothermal field in summer 2005 different volcanic rock units have been sampled to correlate rock magnetic and magneto-mineralogical properties with magnetic field intensity. Additionally, measurements on a dense dolerite intrusion, recovered from the RN–19 borehole (2245–2248m depth) in May 2005 within the frame of IDDP, should shed light on the influence of crustal rocks on the total magnetic field intensity. Generally, the natural remanent magnetization and magnetic susceptibility, measured on rock specimen, is high, ranging between 2.5 and 33.6Am−1 and 2–37 ×10−3 SI, respectively...
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  • 11. Symposium "Tektonik, Struktur- und Kristallingeologie" , 2006-03 [111]
Subjects:
Reykjanes
Reykjanesrücken
Ergussgestein
Magnetische Suszeptibilität
Magnetostratigraphie
Paläomagnetismus {Geophysik}
Atlantischer Ozean {Geophysik}
Nordeuropa {Geophysik}
Erdmagnetische Verfahren {Geophysik}
Island {Geologie}
Teilgebiete {Geologie}
Ozeanische Kruste {Tektonik}
Physikalische Petrologie
Magnetische Stratigraphie {Sedimentologie}
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