Residual Gas Contents of Organic-Rich Canned Sediment Samples from Leg 23

Nature, Origin, and Petroleum Source Potential of Organic Matter from Deep Sea Drilling Project Sites 434, 435, 438, and 440 in the Japan Trench

“…All the samples contained some gas, mostly methane (Table 1), with traces of ethane, propane, and butane. Methane is about as abundant in these sediments as it is in other Tertiary and Quaternary sediments cored on the continental slope off Oregon (Sites 174, 176), in the Aleutian Trench (Sites 180, 186), and in the Bering Sea (Sites 185,189,191) (Mclver, 1973a(Mclver, , 1973b.…”

“…The very low gas contents of some of our samples (less than 1000 ppm) could show that these sediments have very little potential for generating hydrocarbons (Mclver, 1973c). This possibility seems unlikely, because some of the samples which are poor in gas (Table 1) are rich in extractable bitumens (Table 2).…”

“…This possibility seems unlikely, because some of the samples which are poor in gas (Table 1) are rich in extractable bitumens (Table 2). Instead, low gas contents reflect problems in sample-handling, or leakage of the storage cans (Mclver, 1973a(Mclver, , 1973b).…”

Hydrocarbon Gases in Canned Core Samples from Leg 28 Sites 271, 272, and 273, Ross Sea

“…They are more consistently high in value than Site 186 (Mclver, 1973) that had one value of 216,700 ppm of methane. Site 229 (Mclver, 1974) had one sample with 165,000 ppm methane, but the second was 84,500 ppm. Only two samples were sent from this location so we cannot say anything about uniformity of methane contents down the hole.…”

Gaseous and Heavy Hydrocarbons in Canned Core Samples from Leg 24, DSDP

“…Nine canned core samples from Sites 231 and 232 were analyzed by organic geochemical techniques as part of our continuing program to characterize the properties of Deep Sea Drilling Project samples. The total gas in the containers were determined first, by techniques reported earlier (Mclver, 1973), then total organic carbon was run. Because of the high organic carbon contents, some of the samples were next extracted with organic solvents to remove soluble organic matter, bitumens, for subsequent separation and identification (by techniques reported by Gehman, 1962, andKoons andMonaghan, 1960).…”