Proc. IODP, 331, Site C0013

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Chapter contents Background and objectives Operations Arrival at Site C0013 Hole C0013A Hole C0013B Hole C0013C Hole C0013D Hole C0013E Casing and capping of Hole C0013E Hole C0013F Hole C0013G Hole C0013H Lithostratigraphy Description of units Grain size distribution Interpretation Biostratigraphy Petrology Overview of hydrothermal alteration and mineralization at Site C0013 Near-surface sulfidic sediment Kaolinite-muscovite alteration Mottled Mg chlorite and nodular anhydrite alteration Quartz + Mg chlorite–altered volcanic basement Coarsely crystalline anhydrite veining Significance of the transition in “clay” mineralogy Relative timing of alteration and mineralization at Site C0013 Geochemistry Interstitial water Headspace gas Sediment carbon, nitrogen, and sulfur composition Microbiology Total prokaryotic cell counts Cultivation of thermophiles Cultivation of iron-oxidizing bacteria Contamination test Conclusions Physical properties Density and porosity Electrical resistivity (formation factor) Discrete P-wave velocity and anisotropy measurements Thermal conductivity MSCL-I and MSCL-C imaging MSCL-W derived electrical resistivity References Figures F1. Two-dimensional heat flow anomalies. F2. Bathymetric map. F3. Lithostratigraphy. F4. Tight interbedding. F5. Hydrothermal lithoclasts. F6. Euhedral vein anhydrite. F7. Vein clasts. F8. Nodular anhydrite interval. F9. Core photographs. F10. Polymict volcanic breccia clast. F11. Grain size compositions. F12. Grain size classification. F13. Grain size fractions. F14. Alteration assemblages and major mineral phases. F15. Native sulfur. F16. Anhydrite grain. F17. Framboidal pyrite aggregate. F18. Volcanic glass. F19. Opaline silica. F20. Mottled Mg chlorite + anhydrite alteration. F21. Volcanic basement and quartz stockwork veining. F22. Volcanic basement and remnant volcanic glass. F23. Carbon–clay matrix. F24. Hydrothermal activity and alteration. F25. Cl, Br, and sulfate. F26. Na, Na/Cl molar ratio, K, Mg, and Ca. F27. Rb and Cs. F28. B, Li, Sr, and Si. F29. Calcium plus magnesium. F30. Alkalinity, phosphate, and ammonium. F31. TOC, TN, and TS. F32. Hydrogen, methane, and methane/ethane. F33. Calcium carbonate. F34. Bulk density. F35. Porosity. F36. Physical properties parameters. F37. Formation factor. F38. Thermal conductivity. F39. Electrical resistivity. Tables T1. Coring summary. T2. Lithostratigraphic units. T3. Grain size distribution. T4. Micropaleontology samples. T5. XRD analyses. T6. Interstitial pore water. T7. Hydrocarbons. T8. H₂ and CH₄. T9. Carbon, nitrogen, and sulfur. T10. Direct cell counting. T11. Contamination tests with microspheres. T12. Contamination tests with PFT. PDF file			Previous \| Next doi:10.2204/iodp.proc.331.103.2011 References Allen, S.R., Fiske, R.S., and Tamura, Y., 2010. Effects of water depth on pumice formation in submarine domes at Sumisu, Izu-Bonin arc, western Pacific. Geology, 38(5):391–394. doi:10.1130/G30500.1 Árkai, P., 2002. Phyllosilicates in very low-grade metamorphism: transformation to micas. In Mottana, A., Sassi, F.P., Thompson, J.B., Jr., and Guggenheim, S. 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