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- Chapter contents
- Introduction
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 Operations
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Logging while drilling
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Lithology
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Structural geology
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Biostratigraphy
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Paleomagnetism
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Physical properties
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Geochemistry
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Microbiology
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Observatory and downhole measurements
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Core-log-seismic integration
- References
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Figures
- F1. JFAST site map.
- F2. Mudline identification, Hole C0019B.
- F3. Log quality control logs, Hole C0019B.
- F4. Log quality control logs, Hole C0019C.
- F5. LWD log data, Hole C0019B.
- F6. Deep button resistivity and gamma ray, Hole C0019B.
- F7. Gamma ray and deep resistivity value ranges, Hole C0019B.
- F8. Real-time data, Hole C0019C.
- F9. Gamma ray and resistivity variation between log units.
- F10. Deep vs. shallow and bit vs. ring resistivity, Hole C0019B.
- F11. Gamma ray and resistivity variation, Hole C0019B.
- F12. Temperature, porosity, and density, Hole C0019B.
- F13. Repeated picks on bedding surfaces, Hole C0019B.
- F14. Bedding dips and faults/fractures, Hole C0019B.
- F15. Projections of bedding dips and fractures/faults.
- F16. Fault zone at 720 mbsf.
- F17. Bedding attitudes.
- F18. Fault zone at 820 mbsf.
- F19. Line HD33B seismic section.
- F20. RAB electrical images, Hole C0019B.
- F21. Borehole breakout azimuth variation, Hole C0019B.
- F22. Core-log-seismic integration summary diagram.
- F23. Unit 1 siliceous mud showing an ash bed.
- F24. Siliceous microfossils, mud, and vitric volcanic ash.
- F25. Two largest pieces of Unit 2.
- F26. MSCL-I images, Unit 3 mudstone.
- F27. Smear slides, Unit 3 mudstone.
- F28. Units 6 and 7 representative lithologies.
- F29. Major elements, Hole C0019E.
- F30. Whole-rock XRD patterns, Units 3 and 4.
- F31. Unit 5 brown mudstone.
- F32. Bedding and deformation structure dip.
- F33. Fault cutting mudstones in Unit 1.
- F34. Bedding, Hole C0019E.
- F35. Anastomosing dark seams, Hole C0019E.
- F36. X-ray CT bright band, Hole C0019E.
- F37. Thick zone of anastomosing shear surfaces.
- F38. Sediment-filled veins, Hole C0019E.
- F39. Core 343-C119E-17R whole round.
- F40. Uppermost ~30 cm of Core 343-C119E-17R.
- F41. Unit 5, Hole C0019E.
- F42. Units 5 and 6, Hole C0019E.
- F43. Paleomagnetic measurements, Hole C0019E.
- F44. AMS parameters, Hole C0019E.
- F45. Vector endpoint diagrams, Hole C0019E.
- F46. Paleomagnetic declinations and inclinations.
- F47. MSCL-W data, Core 343-C0019E-1R.
- F48. MSCL-W data, Cores 343-C0019E-2R through 21R.
- F49. MSCL-W data, Core 343-C0019E-17R.
- F50. MAD measurements, Hole C0019E.
- F51. UCS of discrete cylindrical samples, Hole C0019E.
- F52. P-wave velocity, Hole C0019E.
- F53. Vertical anisotropy, Hole C0019E.
- F54. Elastic wave velocity, Hole C0019E.
- F55. Electrical resistivity, Hole C0019E.
- F56. Particle size analysis, Core 343-C0019E-1R.
- F57. L*, a*, and b*, Hole C0019E.
- F58. SO42–, alkalinity, pH, PO4, NH4+, salinity, chlorinity, and Br–.
- F59. Cross-plots of selected elements.
- F60. Na, K, Ca, Mg, Ba, Fe, Si, B, Li, and Mn.
- F61. V, Zn, Sr, Rb, Mo, Cs, Pb, U, and Cu.
- F62. TC, IC, CaCO3, TOC, TN, TS, TOC/TN ratio, and TOC/TS ratio.
- F63. H2, CO, CH4, C2H6, C1/C2 ratio, and CH4/H2 ratio, Hole C0019E.
- F64. Temperatures and depths, MTL Run 1.
- F65. Temperature data, MTL Run 1.
- F66. Temperatures and depths, MTL Run 2.
- F67. Temperature data, MTL Run 2.
- F68. Temperatures and depths, MTL Run 3.
- F69. Temperature data, MTL Run 3.
- F70. Line HD33B log curves, Hole C0019B.
- F71. Log units on Line HD33B.
- F72. Core-Log-Seismic data.
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Tables
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PDF file
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doi:10.2204/iodp.proc.343343T.103.2013
Microbiology
Whole-round sampling
Whole-round samples were collected and analyzed from 12 of the 21 cores recovered from Hole C0019E (Table T14). Following the procedures described in “Microbiology” in the “Methods” chapter (Expedition 343/343T Scientists, 2013), the whole-round samples were subsequently subsampled for each analysis.
Contamination tests
PFC tracer was added to the drilling mud tank every time a new batch of drilling mud was prepared with surface seawater. After preparations were complete, a 50 cm3 sample was collected to measure PFC concentration so that the drilling fluid contamination of core samples could be assessed. PFC concentrations in the drilling mud were variable, ranging from 1.66 to 989 µg/cm3 (Table T14). These variations could be explained by the insufficient mixing of highly viscous drilling mud and PFC solution in the drilling mud tank. Two mud samples showed very high concentrations of PFC (Samples 343-C0019E-Mud-5/19–20 and Mud-5/20 in Table T14), which could represent insufficient mixing of the PFC solution. The other values (1.65–1.88 µg/cm3) represent average PFC concentrations in drilling mud sufficiently mixed with PFC.
PFC concentrations in the microbiological whole-round samples were generally much lower than those measured in drilling mud. Predictably, the exterior portions of whole-round samples always have higher PFC contaminations than the interior (Table T14); therefore, microbiological subsamples were only collected from the interior. Among all samples collected, the interiors of Cores 343-C0019E-4R, 12R, and 19R were found to be completely free from any drilling mud contamination. This implies that these subsamples escaped contamination from not only the drilling mud, but also from ambient seawater during core recovery. Similarly, the interior parts of Cores 343-C0019E-5R, 7R, 8R, 15R, and 20R show relatively less drilling mud and seawater contamination (Table T14). However, both the exterior and interior of Cores 343-C0019E-6R and 13R exhibited high concentrations of PFC. Thus, the microbiological data and even interstitial water chemistry data from these samples should be carefully examined for the potential of drilling mud and seawater contamination.
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