ISSN:
1432-1157
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract Gassy sediments are detectable acoustically in subbottom profiles of Canada's Fraser Delta slope and prodelta areas. Interstitial gas is typically represented by zones of acoustic turbidity on high-resolution seismic profiles and by gas brightening on air-gun profiles. The top of the acoustically turbid zone is generally highest within the sediment column closest to the river mouths and lies within 10 ms (two-way travel time) of the sea floor in a nearly continuous area that covers over 530 km2. Most of the gas is believed to be biogenic in origin, although thermogenic gas derived from underlying Tertiary sedimentary rocks may be present in places.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01204392
