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Whelan, Jean K; Sato, S (1980): C1–C5 hydrocarbons from core gas pockets at DSDP Leg 56 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.823108, Supplement to: Whelan, JK; Sato, S (1980): C1-C5 hydrocarbons from core gas pockets, Deep Sea Drilling Project Legs 56 and 57, Japan Trench transect. In: Scientific Party, Initial Reports of the Deep Sea Drilling Project, 56/57, Initial Reports of the Deep Sea Drilling Project, 56/57, U.S. Government Printing Office, 56-57, 1335-1347, https://doi.org/10.2973/dsdp.proc.5657.168.1980

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Abstract:
C1-C5 hydrocarbons from DSDP Legs 56 and 57 sediment gas pockets were analyzed on board ship. Results suggest that the C2-C5 hydrocarbons accompanied biogenic methane and were generated at low temperatures - less than 50° C - either by microorganisms or by low-temperature chemical reactions. Neopentane, a rare constituent of petroleum, is the major C5 component (about 80%) in much of the sediment at Site 438. This compound, which appeared in smaller amounts at Sites 434, 439, 440, and 441, seems to correlate with either fractured or coarse-grained sediments. Scatter in C4 and C5 isomer ratios and generally good correlation between C3, C4 and C5 components suggest local sources for these molecules.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 39.737049 * Median Longitude: 143.847702 * South-bound Latitude: 39.734800 * West-bound Longitude: 143.792200 * North-bound Latitude: 39.747800 * East-bound Longitude: 144.102000
Date/Time Start: 1977-09-12T00:00:00 * Date/Time End: 1977-09-18T00:00:00
Event(s):
56-434 * Latitude: 39.746000 * Longitude: 144.102000 * Date/Time: 1977-09-12T00:00:00 * Elevation: -5986.0 m * Penetration: 301 m * Recovery: 54.2 m * Location: North Pacific/TRENCH * Campaign: Leg56 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 301 m cored; 0 m drilled; 18 % recovery
56-434B * Latitude: 39.747800 * Longitude: 144.101300 * Date/Time: 1977-09-12T00:00:00 * Elevation: -5986.0 m * Penetration: 637.5 m * Recovery: 63.2 m * Location: North Pacific/TRENCH * Campaign: Leg56 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 32 cores; 295.5 m cored; 47.5 m drilled; 21.4 % recovery
56-435 * Latitude: 39.734800 * Longitude: 143.792200 * Date/Time: 1977-09-18T00:00:00 * Elevation: -3401.0 m * Penetration: 150.5 m * Recovery: 78.4 m * Location: North Pacific/TRENCH * Campaign: Leg56 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 141 m cored; 9.5 m drilled; 55.6 % 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. Whelan, JK; Sato, S (1980): (Table 2) Gas quantity at DSDP Site 56-435. https://doi.org/10.1594/PANGAEA.823106
  2. Whelan, JK; Sato, S (1980): (Table 3) Gas behaviour versus sediment type at DSDP Site 56-435. https://doi.org/10.1594/PANGAEA.823107
  3. Whelan, JK; Sato, S (1980): (Table 1) CH4 and delta 13C, methane at DSDP Leg 56 Holes. https://doi.org/10.1594/PANGAEA.823105