At Site 1114, the shipboard organic geochemistry consisted of determination of TOC, inorganic carbon, total carbon, total nitrogen, and total sulfur in sediments, in addition to the routine hydrocarbon gas safety monitoring procedure. The analytical techniques used are outlined in "Organic Geochemistry" in the "Explanatory Notes" chapter.
Headspace methane concentrations were found to be low and remained <5 ppmv throughout Hole 1114A (Table T10). Only one other hydrocarbon, ethylene, was detected at a very low concentration (0.1 ppmv).
The CaCO3 concentration was below 5-10 wt% for most of the sediments (Table T11; Fig. F44), except for a surficial ooze (65 wt%) and two samples from 219 and 231 mbsf (17 and 24 wt%). Organic carbon content (Table T11) was low (<1%) throughout Hole 1114A (Fig. F44) with the exception of a peak of 1.4% at 231 mbsf, which corresponds to a thin ash layer containing small fragments of woody material. The C/N ratios showed a mixture of predominantly marine (C/N = <8) and mixed marine/terrigenous (C/N = 8-20) organic material throughout the hole. Total sulfur contents were low, averaging 0.33% (Table T11). The single-point maximum at 238 mbsf (1.64%) corresponded to a section containing significant pyritization.