Proc. IODP, 308, Data report: stress orientations from borehole breakouts, IODP Expedition 308, Ursa area, Mississippi Fan, Gulf of Mexico

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Chapter contents Abstract Introduction Description of breakouts Orientation of breakouts Implications Acknowledgments References Figures F1. Bathymetry, Ursa region. F2. Resistivity images. F3. Breakout orientations, Site U1322. F4. Breakout orientations, Site U1324. PDF file			Previous \| Next doi:10.2204/iodp.proc.308.212.2009 Introduction Borehole breakouts were recognized during the initial analysis of logging-while-drilling (LWD) imaging logs from Integrated Ocean Drilling Program (IODP) Expedition 308 (see the “Site U1322” chapter). Elsewhere breakouts have been documented from convergent margins during the Ocean Drilling Program (ODP) (Goldberg and Janik, 2006; McNeill et al., 2004). The breakouts from Expedition 308 cores are a first occurrence, encountered during IODP drilling, from a passive continental margin. The site report notes that the breakouts are oriented approximately east–west. This data report provides a more extensive examination of the breakouts from the Ursa region on the Mississippi Fan (Fig. F1). The analysis includes quantification of the azimuthal and depth distribution of the breakouts and was conducted using GMI-Imager software, produced by Geomechanics International. Top of page \| Previous \| Next

Introduction