(Table 1) C1 - C8 volatile compounds in sediments from DSDP Leg 63 Holes
Autoria(s):
Whelan, Jean K; Hunt, John M
Cobertura
MEDIAN LATITUDE: 31.037820 * MEDIAN LONGITUDE: -118.805880 * SOUTH-BOUND LATITUDE: 23.482200 * WEST-BOUND LONGITUDE: -120.757800 * NORTH-BOUND LATITUDE: 33.849500 * EAST-BOUND LONGITUDE: -112.496300 * DATE/TIME START: 1978-10-10T00:00:00 * DATE/TIME END: 1978-11-08T00:00:00 * MINIMUM DEPTH, sediment/rock: 7.8 m * MAXIMUM DEPTH, sediment/rock: 967.0 m
Data(s)
13/09/1981
Resumo
Low-temperature diagenetic reactions (less than 50°C) are held responsible for the generation of small amounts of C1-C8 hydrocarbons (less than 100 ng hydrocarbon/g dry weight of sediment) at outer continental shelf Deep Sea Drilling Project Sites 468 and 469 (sub-bottom depths 415 m and 454 m, respectively). In contrast, Site 471 shows an exponential rise in hydrocarbon yields at depths greater than 500 meters. The high yields of C4-C8 hydrocarbons (up to 30 ng hydrocarbon/g dry weight of sediment) in this area of high geothermal and volcanic activity suggest the penetration of an active petroleum-generating zone. Similar arguments apply to Site 467, where relatively high levels (up to 3 µg hydrocarbon/g dry weight sediment) occurred in very shallow (250-600 m) sediments.
Supplement to: Whelan, Jean K; Hunt, John M (1981): C1-C8 hydrocarbons in IPOD Leg 63 sediments from outer California and Baja California borderlands. In: Yeats, RS; Haq, BU; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 63, 775-784, doi:10.2973/dsdp.proc.63.132.1981
