Proc. IODP, 314/315/316, Data report: joint analysis of acoustic and magnetic susceptibility anisotropies in the Nankai accretionary prism

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Chapter contents Abstract Introduction Sampling and preparation Methods Sample reorientation Anisotropy of magnetic susceptibility Anisotropy of P-wave velocity Results Bulk analysis Physical property fabrics Tectonic implications Acknowledgments References Figures F1. Kumano transect cross section. F2. Discrete sample. F3. P_j vs. K_m and P_j vs. V_m. F4. T_j vs. P_j. F5. AMS and APV eigenvectors. F6. T_j from AMS versus T_j from APV. Table T1. Physical properties measurements. PDF file			Previous \| Next doi:10.2204/iodp.proc.314315316.216.2012 Data report: joint analysis of acoustic and magnetic susceptibility anisotropies in the Nankai accretionary prism¹ Laurent Louis,^2, ³ Fabien Humbert,² Philippe Robion,² Pierre Henry,⁴ Matthew Knuth,⁵ and William Likos⁶ Abstract This report presents the results of laboratory measurements on discrete samples from Integrated Ocean Drilling Program Expeditions 315 and 316 of the complex drilling project Nankai Trough Seismogenic Zone Experiment. Anisotropies of P-wave velocity and magnetic susceptibility were measured on a common suite of samples to evaluate the potential of acoustic anisotropy as a tool for deformation studies. Whereas in-plane P-wave velocity directions provide ambiguous results, the associated anisotropy parameter appears exempt from lithologic artifacts, in contrast to anisotropy of magnetic susceptibility, and overall agreement between the fabric shape parameter values suggests further exploratory work. ¹ Louis, L., Humbert, F., Robion, P., Henry, P., Knuth, M., and Likos, W., 2012. Data report: joint analysis of acoustic and magnetic susceptibility anisotropies in the Nankai accretionary prism. In Kinoshita, M., Tobin, H., Ashi, J., Kimura, G., Lallemant, S., Screaton, E.J., Curewitz, D., Masago, H., Moe, K.T., and the Expedition 314/315/316 Scientists, Proc. IODP, 314/315/316: Washington, DC (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.314315316.216.2012 ² Département des Sciences de la Terre et l’Environnement, Université de Cergy-Pontoise, 95031 Cergy-Pontoise, France. Correspondence author: laurent.louis@bp.com ³ BP America, Houston TX 77079, USA. ⁴ CEREGE, Collège de France, 13545 Aix-en-Provence Cedex 04, France. ⁵ Department of Geosciences, University of Wisconsin-Madison, Madison WI 53706, USA. ⁶ Department of Civil and Environmental Engineering, University of Missouri, Columbia MO 65211, USA. Initial receipt: 21 December 2010 Acceptance: 19 October 2011 Publication: 23 January 2012 MS 314315316-216 Top of page \| Previous \| Next