Proc. IODP, 334, Site U1381

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Chapter contents Background and objectives Operations Transit to Site U1381 Site U1381 Lithostratigraphy and petrology Description of units Tephra layers Depositional environment and correlation to Sites U1378 and U1379 Alteration Paleontology and biostratigraphy Foraminifers Structural geology Structures in sediment Structures in basalt Geochemistry and microbiology Geochemistry Microbiology Physical properties Density and porosity Magnetic susceptibility Natural gamma radiation P-wave velocity Thermal conductivity Downhole temperature Heat flow Vane shear Color spectrometry Paleomagnetism Natural remanent magnetization Demagnetization behavior References Figures F1. Site location. F2. Graphic summary log. F3. Silty clay. F4. Silty clay with tephra layer. F5. Chilled margin. F6. Plagioclase-phyric basalt. F7. Core image, Unit III. F8. Core image, Unit III. F9. Core image, Unit III. F10. Silicified tephra layer. F11. Bedding plane dips. F12. Mineral-filled veins and fractures. F13. Concentration-depth profiles. F14. Density and porosity. F15. Magnetic susceptibility. F16. Natural gamma radiation. F17. Compressional wave velocity. F18. Thermal data. F19. Temperature-time series. F20. Undrained shear strength. F21. Reflectance values. F22. Sediment paleomagnetic measurements. F23. Basalt paleomagnetic measurements. F24. Sediment magnetization directions. F25. Basalt magnetization directions. F26. Discrete sample AF demagnetization. F27. Magnetization intensity change. Tables T1. Operations summary. T2. Calcareous nannofossils. T3. Planktonic foraminifers. T4. Interstitial water chemistry. T5. Temperature measurements. PDF file			Previous \| Next doi:10.2204/iodp.proc.334.106.2012 References Barckhausen, U., Ranero, C.R., von Huene, R., Cande, S.C., and Roeser, H.A., 2001. Revised tectonic boundaries in the Cocos plate off Costa Rica: implications for the segmentation of the convergent margin and for plate tectonic models. J. Geophys. Res., [Solid Earth], 106(B9):19207–19220. doi:10.1029/2001JB000238 Expedition 334 Scientists, 2012. Methods. In Vannucchi, P., Ujiie, K., Stroncik, N., Malinverno, A., and the Expedition 334 Scientists, Proc. IODP, 334: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.334.102.2012 Fisher, A.T., Stein, C.A., Harris, R.N., Wang, K., Silver, E.A., Pfender, M., Hutnak, M., Cherkaoui, A., Bodzin, R., and Villinger, H., 2003. Abrupt thermal transition reveals hydrothermal boundary and role of seamounts within the Cocos plate. Geophys. Res. Lett., 30(11):1550–1553. doi:10.1029/2002GL016766 Kimura, G., Silver, E.A., Blum, P., et al., 1997. Proc. ODP, Init. Repts., 170: College Station, TX (Ocean Drilling Program). doi:10.2973/odp.proc.ir.170.1997 Morris, J.D., Villinger, H.W., and Klaus, A. (Eds.), 2006. Proc. ODP, Sci. Results, 205: College Station, TX (Ocean Drilling Program). doi:10.2973/odp.proc.sr.205.2006 Silver, E., Kastner, M., Fisher, A., Morris, J., McIntosh, K., and Saffer, D., 2000. Fluid flow paths in the Middle America Trench and Costa Rica margin. Geology, 28(8):679–682. doi:10.1130/0091-7613(2000)28<679:FFPITM>2.0.CO;2 Stein, C.A., and Stein, S., 1994. Constraints on hydrothermal heat flux through the oceanic lithosphere from global heat flow. J. Geophys. Res., [Solid Earth], 99(B2):3081–3095. doi:10.1029/93JB02222 von Huene, R., Ranero, C.R., Weinrebe, W., and Hinz, K., 2000. Quaternary convergent margin tectonics of Costa Rica, segmentation of the Cocos plate, and Central American volcanism. Tectonics, 19(2):314–334. doi:10.1029/1999TC001143 Zijderveld, J.D.A., 1967. AC demagnetization of rocks: analysis of results. In Collinson, D.W., Creer, K.M., and Runcorn, S.K. (Eds.), Methods in Palaeomagnetism: New York (Elsevier), 254–286. Top of page \| Previous \| Next

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