Proc. IODP, 308, Data report: natural remanent magnetization of IODP Holes U1319A, U1320A, U1322B, and U1324B and magnetic carrier identification by scanning electron microscopy

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Chapter contents Abstract Introduction Material and methods Magnetic techniques Scanning electron microscopy techniques Results Paleomagnetic analysis of Brazos-Trinity Basin IV (Holes U1319A and U1320A) Paleomagnetic analysis of the Ursa Basin (Holes U1322B and U1324B) SEM analyses of the magnetic mineral assemblage (Hole U1319A) Summary and outlook Acknowledgments References Figures F1. Map of Gulf of Mexico. F2. AF demagnetization, Sites U1319 and U1320. F3. AF demagnetization, Sites U1322 and U1324. F4. Hole U1319A NRM results. F5. Hole U1320A NRM results. F6. Hole U1322B NRM results. F7. Hole U1324B NRM results. F8. SEM micrographs. Tables T1. Inclination and declination per site. T2. Inclination and declination per core. T3. Semiquantitative EDS analyses. PDF file			Previous \| Next doi:10.2204/iodp.proc.308.209.2009 Data report: natural remanent magnetization of IODP Holes U1319A, U1320A, U1322B, and U1324B and magnetic carrier identification by scanning electron microscopy¹ Christine Franke,^2, 3 Yanzhe Fu,^3, 4 David Heslop,³ and Tilo von Dobeneck³ Abstract Paleomagnetic analyses of the natural remanent magnetization of >1700 vertically oriented sediment samples from Integrated Ocean Drilling Program (IODP) Holes U1319A, U1320A, U1322B, and U1324B in the northern Gulf of Mexico reveal complex magnetostratographic signals for the Brazos-Trinity and Ursa region carried by detrital iron oxide minerals. Additionally, gyroremanent magnetization was observed to form during alternating-field demagnetization of samples containing an enhanced amount of magnetic iron sulfide minerals. Most characteristic remanent magnetization inclinations are reasonable for the site latitudes. Stable declinations allow for azimuth correction of the formerly unoriented drill cores. ¹Franke, C., Fu, Y., Heslop, D., and von Dobeneck, T., 2009. Data report: natural remanent magnetization of IODP Holes U1319A, U1320A, U1322B, and U1324B and magnetic carrier identification by scanning electron microscopy. In Flemings, P.B., Behrmann, J.H., John, C.M., and the Expedition 308 Scientists, Proc. IODP, 308: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.308.209.2009 ²Laboratoire des Sciences du Climat et de l’Environnement, CEA-CNRS-UVSQ, Campus du CNRS, Bâtiment 12, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France. christine.franke@lsce.ipsl.fr ³Department of Geosciences, University of Bremen, Klagenfurter Strasse, 28359 Bremen, Germany. ⁴School of Engineering and Sciences, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany. Initial receipt: 7 April 2008 Acceptance: 9 October 2008 Publication: 6 April 2009 MS 308-209 Top of page \| Previous \| Next