Magnetic anomalies and rock magnetism of basalts from Reykjanes (SW-Iceland)

被引：0
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作者：
Frank Dietze
Agnes Kontny
Ingo Heyde
Carsten Vahle
机构：
[1] Karlsruher Institut für Technologie (KIT),Institut für Angewandte Geowissenschaften
[2] Bundesanstalt für Geowissenschaften und Rohstoffe,undefined
[3] Eriksfiord AS,undefined
[4] Kunnskapsparken,undefined
来源：
Studia Geophysica et Geodaetica | 2011年 / 55卷
关键词：
remanent and induced magnetization; magnetic mineralogy; basalts on Iceland; short and intermediate wave-length magnetic anomalies;
D O I：
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摘要：
This study presents rock magnetic properties along with magnetic field measurements of different stratigraphic and lithologic basalt units from Reykjanes, the southwestern promontory of the Reykjanes peninsula, where the submarine Reykjanes Ridge passes over into the rift zone of southwestern Iceland. The basaltic fissure eruptions and shield lava of tholeiitic composition (less than 11500 a old) show a high natural remanent magnetization (NRM, Jr) up to 33.6 A/m and high Koenigsberger ratio (Q) up to 52.2 indicating a clear dominance of the NRM compared to the induced part of the magnetization. Pillow basalts and picritic shield lava show distinctly lower Jr values below 10 A/m. Magnetic susceptibility (κ) ranges for all lithologies from 2.5 to 26×10−3 SI.
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页码：109 / 130
页数：21
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