Abstract
Anisotropy of Magnetic Susceptibility (AMS) is a valid tool to investigate magma flow direction within dikes. However, geometrically inverse magnetic fabric characterized by maximum magnetic susceptibility axis (kmax) perpendicular to the dike wall, may complicate the interpretation of flow trajectories. To better understand the nature of this fabric, we present a multi-scale study on 19 dikes (383 samples) in the Miocene Alftafjordur volcanic system (Iceland), where 80% of the samples show a geometrically inverse magnetic fabric. We carried out (1) AMS measurements at different magnetic fields and temperatures, along with Anisotropy of Anhystheretic Remanent Magnetization (AARM) analysis; (2) Hysteresis loops and FORC diagrams; (3) thin section analysis; (4) structural fieldwork. A variable Ti-content (10
Original language | English (US) |
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Journal | Journal of Geophysical Research: Solid Earth |
DOIs | |
State | Published - Oct 29 2020 |
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Magnetic susceptibility and thin sections data from the the Alftafjordur volcanic system in Eastern Iceland
Trippanera, D. (Creator), Porreca, M. (Creator), Urbani, S. (Creator), Kissel, C. (Creator), Winkler, A. (Creator), Sagnotti, L. (Creator), Nazzareni, S. (Creator), Acocella, V. (Creator), Porreca, M. (Creator), Urbani, S. (Creator), Kissel, C. (Creator), Winkler, A. (Creator), Sagnotti, L. (Creator), Nazzareni, S. (Creator) & Acocella, V. (Creator), GFZ Data Services, 2020
DOI: 10.5880/fidgeo.2020.026, http://hdl.handle.net/10754/668591
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