Residual Hydrocarbon Gases in Canned Core Material from Holes 379A and 380A, Leg 42B

Abstract

Nine samples, eight from Hole 379A and one from Hole 380A, of sediment specifically canned for determination of residual gases contained the moderate amounts of hydrocarbon gas, virtually all of which was methane. These quantities are consistent with values detained from previous analysis of samples from earlier legs. Four additional samples from Holes 380 and 380A, collected and frozen for organic geochemistry, had moderate amounts of predominantly amorphous kerogen and were at a low state of thermal alteration (about 2) in the 1 to 5 alteration index scale, which was also evidenced by the low hydrocarbon to total bitumen ratio of the solvent extractables.