Unknown
PANGAEA
In:
Supplement to: Whelan, Jean K; 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
Publication Date:
2023-06-27
Description:
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.
Keywords:
56-434; 56-434B; 56-435; 56-435A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg56; North Pacific/TRENCH
Type:
Dataset
Format:
application/zip, 3 datasets
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