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Li, Long; Bebout, Gray E (2006): Carbon and Nitrogen concentrations and isotopic composition of ODP Site 170-1040 and Leg 205 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.775318, Supplement to: Li, L; Bebout, GE (2006): Carbon and nitrogen geochemistry of wedge sediments at ODP Site 1040: evidence for sediment sources, diagenetic history, and fluid mobility. In: Morris, JD; Villinger, HW; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 205, 1-38, https://doi.org/10.2973/odp.proc.sr.205.214.2006

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Abstract:
We determined the C and N concentrations and isotopic compositions of sediments in the prism sampled during Ocean Drilling Program Legs 170 and 205 offshore Costa Rica, with the goals of evaluating sediment sources and extents of diagenesis and identifying any effects of infiltrating fluids on the sedimentary C and N. The sediments from Leg 170 Site 1040 contain 0.85-1.96 wt% total organic carbon (TOC) with Vienna Peedee belemnite (VPDB) d13CVPDB from -26.3 per mil to -22.5 per mil, and 832-2221 ppm total nitrogen (TN) with d15Nair from +3.5 per mil to +6.6 per mil. Sediment TN concentrations and d15N values show dramatic downhole increases within the uppermost 130 m of the section and more gradual downhole decreases from 130 meters below seafloor (mbsf) to the base of the décollement at ~370 mbsf. Concentrations and isotopic compositions of TOC are relatively uniform within the entire section, showing some minor perturbation within the décollement zone. In the uppermost 100 m, upsection increases in TN concentrations at constant TOC concentrations produce significant increases in atomic TOC/TN ratios from ~8 to ~18. Carbonate (calcite) contents in the wedge sediments are generally low (<4 wt%), but the d13C and Vienna standard mean ocean water (VSMOW) d18OVSMOW values vary significantly from -26.1 per mil to +4.1 per mil and from +30.0 per mil to +35.3 per mil, respectively. Concentrations and isotopic compositions of TOC and TN for sediments from Leg 205 Sites 1254 and 1255 overlap well with C-N data for sediments from the same depth intervals obtained during Leg 170 at Site 1040.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 9.660590 * Median Longitude: -86.179988 * South-bound Latitude: 9.654530 * West-bound Longitude: -86.185810 * North-bound Latitude: 9.661700 * East-bound Longitude: -86.178900
Date/Time Start: 1996-11-05T03:45:00 * Date/Time End: 2002-10-26T00:00:00
Event(s):
170-1040A * Latitude: 9.661700 * Longitude: -86.179100 * Date/Time Start: 1996-11-05T03:45:00 * Date/Time End: 1996-11-05T15:45:00 * Elevation: -4177.0 m * Penetration: 9.5 m * Recovery: 9.58 m * Location: Costa Rica subduction complex, North Pacific Ocean * Campaign: Leg170 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 9.5 m cored; 0 m drilled; 100.8 % recovery
170-1040B * Latitude: 9.661700 * Longitude: -86.179100 * Date/Time Start: 1996-11-05T15:45:00 * Date/Time End: 1996-11-08T06:30:00 * Elevation: -4178.0 m * Penetration: 190.2 m * Recovery: 127.92 m * Location: Costa Rica subduction complex, North Pacific Ocean * Campaign: Leg170 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 190.2 m cored; 0 m drilled; 67.3 % recovery
170-1040C * Latitude: 9.661600 * Longitude: -86.178900 * Date/Time Start: 1996-11-11T05:30:00 * Date/Time End: 1996-11-18T12:00:00 * Elevation: -4177.9 m * Penetration: 665 m * Recovery: 377.28 m * Location: Costa Rica subduction complex, North Pacific Ocean * Campaign: Leg170 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 505.7 m cored; 0 m drilled; 74.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Li, L; Bebout, GE (2006): (Table AT1) TOC concentrations and δ¹³C of sediments from ODP Holes 170-1040C and 205-1254A decalcified with varying HCl concentrations. https://doi.org/10.1594/PANGAEA.775315
  2. Li, L; Bebout, GE (2006): (Table T1) Carbon and nitrogen concentrations, and δ¹³C and d15N of sediments from ODP Leg 205 Sites and Site 170-1040. https://doi.org/10.1594/PANGAEA.775314
  3. Li, L; Bebout, GE (2006): (Table AT2) Nitrogen concentrations and d15N of sediments from ODP Holes 170-1040C and 205-1254A decalcified with varying HCl concentrations. https://doi.org/10.1594/PANGAEA.775316