Proc. IODP, 342, Site U1402

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Expedition reports Research results Supplementary material Drilling maps Expedition bibliography
Chapter contents Background and objectives Operations Hole U1402A summary Hole U1402B summary Description Lithostratigraphy Unit I Biostratigraphy Calcareous nannofossils Radiolarians Planktonic foraminifers Benthic foraminifers Paleomagnetism Results Magnetostratigraphy Magnetic susceptibility and anisotropy of magnetic susceptibility Geochemistry Sediment gas sampling and analysis Interstitial water chemistry Depositional environment control on interstitial water chemistry Sediment geochemistry Physical properties Density and porosity Magnetic susceptibility P-wave velocity Natural gamma radiation Color reflectance MDHDS deployment Components Deployment Deployment results Results References Figures F1. Site map. F2. ODP Site 1073 core data. F3. Lithologic summary. F4. Representative lithology. F5. MS and paleomagnetism data. F6. AF demagnetization results. F7. AMS vs. depth. F8. Sediment geochemistry. F9. Bulk and grain densities. F10. P-wave velocity and color reflectance. F11. MDHDS components. F12. MDHDS assembly. F13. Telemetry system. F14. MFTM components. F15. ERS electronics and latch motor housing. F16. ERS sinker bar. F17. ERS latch. F18. Inner barrel subassembly. F19. Outer barrel subassembly. F20. Inner and outer barrel subassemblies. F21. Latch and latching tool. F22. Latch mechanism. F23. Latch mechanism. F24. Inner barrel subassembly and RS fishing neck. F25. Lifting the MDHDS. F26. Placing the MDHDS in the drill string. F27. IE4M connector. F28. Stages of MDHDS deployment. F29. Maximum reach of ERS. F30. Deployment 1 T2P data, 0–14,000 s. F31. Deployment 1 T2P data, 12,600–13,400 s. F32. Deployment 1 T2P data, 20,600–22,000 s. F33. Deployment 2 T2P data, –5,000–20,000 s. F34. Deployment 2 T2P data, –1,000 to –400s. F35. Deployment 2 T2P data, –300–300 s. F36. Pressure, temperature, and ship heave. F37. Deployment 2 T2P data, 2,000–2,500 s. F38. Deployment 2 wireline tension data. F39. Pressure and temperature dissipation. F40. Pressure vs. depth. F41. Inner rod subassembly. Tables T1. Coring summary. T2. Foraminifer distribution. T3. AF demagnetization results. T4. Discrete sample AMS. T5. Headspace gas geochemistry. T6. Interstitial water geochemistry. T7. Sediment geochemistry. T8. MDHDS engineering personnel transit. T9. MDHDS testing events, Deployment 1. T10. MDHDS testing events, Deployment 2. T11. MDHDS testing details, Deployment 2. PDF file			Previous \| Next doi:10.2204/iodp.proc.342.103.2014 Site U1402¹ R.D. Norris, P.A. Wilson, P. Blum, A. Fehr, C. Agnini, A. Bornemann, S. Boulila, P.R. Bown, C. Cournede, O. Friedrich, A.K. Ghosh, C.J. Hollis, P.M. Hull, K. Jo, C.K. Junium, M. Kaneko, D. Liebrand, P.C. Lippert, Z. Liu, H. Matsui, K. Moriya, H. Nishi, B.N. Opdyke, D. Penman, B. Romans, H.D. Scher, P. Sexton, H. Takagi, S.K. Turner, J.H. Whiteside, T. Yamaguchi, and Y. Yamamoto² Background and objectives Integrated Ocean Drilling Program (IODP) Site U1402 was chosen as the location for the engineering test of the Motion Decoupled Hydraulic Delivery System (MDHDS). The MDHDS is a new downhole tool delivery system that is deployed by wireline and uses drill string pressure to advance a penetrometer (or other downhole tool) into the formation at the bottom of the borehole. After hydraulic deployment of the penetrometer, the bottom-hole assembly (BHA) is completely decoupled from the BHA; this eliminates the adverse effects of ship heave. The motivation for this engineering development is discussed by Flemings et al. (in press) and in “Background and Objectives: Motion Decoupled Hydraulic Delivery System sea trials” in the “Expedition 342 summary” chapter (Norris et al., 2014a). Site U1402 is at the same location as Ocean Drilling Program (ODP) Leg 174A Site 1073 (Fig. F1). At this location, the continental slope is smooth and draped by sediments from the Hudson apron, and the water depth is 639 m. During Leg 174A, advanced piston corer (APC) cores were taken to 215 m below seafloor (mbsf). Sediments within the uppermost 200 mbsf were dominated by silty clay (Shipboard Scientific Party, 1998). The former Site 1073 was chosen because the lithology was well understood from previous drilling (Fig. F2). The mudstone lithology was known to be appropriate for deployment of a penetrometer. Finally, previous work had inferred the presence of excess pressures in this location (Dugan and Flemings, 2000) (Fig. F2), and thus a scientific goal was to directly document the presence of overpressures. Approximately 2 days of ship time were dedicated to testing the MDHDS. When time allowed, some piston cores were also taken. ¹ Norris, R.D., Wilson, P.A., Blum, P., Fehr, A., Agnini, C., Bornemann, A., Boulila, S., Bown, P.R., Cournede, C., Friedrich, O., Ghosh, A.K., Hollis, C.J., Hull, P.M., Jo, K., Junium, C.K., Kaneko, M., Liebrand, D., Lippert, P.C., Liu, Z., Matsui, H., Moriya, K., Nishi, H., Opdyke, B.N., Penman, D., Romans, B., Scher, H.D., Sexton, P., Takagi, H., Turner, S.K., Whiteside, J.H., Yamaguchi, T., and Yamamoto, Y., 2014. Site U1402. In Norris, R.D., Wilson, P.A., Blum, P., and the Expedition 342 Scientists, Proc. IODP, 342: College Station, TX (Integrated Ocean Drilling Program). doi:10.2204/iodp.proc.342.103.2014 ² Expedition 342 Scientists’ addresses. Publication: 3 March 2014 MS 342-103 Top of page \| Previous \| Next

Site U14021

Background and objectives

Site U1402¹