In this section
@article{Jackson:2012,
author = {Jackson, CAL},
journal = {Geological Society of America Bulletin},
pages = {746--761},
title = {The initiation of submarine slope failure and the emplacement of mass-transport deposits in salt-related minibasins: a 3D seismic reflection case study from the Santos Basin, offshore Brazil},
url = {http://gsabulletin.gsapubs.org/content/124/5-6/746.full},
volume = {124},
year = {2012}
}
TY - JOUR
AB - 3D seismic reflection data are used to characterise the seismic expression and investigate the origin of two mass transport complexes, which are contained in two salt-related minibasins on the São Paulo Plateau, offshore SE Brazil. The mass transport complex contains numerous slide blocks, which are expressed on seismic data as broadly tabular packages of weakly-deformed reflections. Individual slides blocks are up to 50 m thick and up to 1 km2 in plan-view. The slide blocks are flanked by laterally continuous reflections, which are interpreted as the seismic expression of either a thin mudstone-dominated debrite deposit or a thin interval of hemipelagic mudstones. The surface that bounds the base of the mass transport complex is planar and this suggests that the associated gravity flow event was associated with only limited erosion of the seafloor. The upper surface of the mass transport complex is very rugose and onlapped by overlying strata, indicating that the slide blocks formed seabed relief of up to 20 m. The mass transport complex occurs at the base of a unit that thins towards the margins of the studied minibasins, and the slide blocks in the mass transport complex decrease in size and density away from the salt-cored structural high that separates the two minibasins. Based on its seismic-stratigraphic context and the spatial distribution of the slide blocks which is contains, the mass transport complex is interpreted to have been derived from the failure of material of the margins of the salt-cored high in response a period of relatively rapid minibasin subsidence. The results of this study indicate that large volumes of sedimentary material may be derived from the margins of salt-related minibasins in relatively distal submarine settings. From a geohazard perspective this observation is important, as it is typically thought that the risk associated with submarine slope failure, and the transport and emplacement of large blocks, is low in relatively
AU - Jackson,CAL
EP - 761
PY - 2012///
SP - 746
TI - The initiation of submarine slope failure and the emplacement of mass-transport deposits in salt-related minibasins: a 3D seismic reflection case study from the Santos Basin, offshore Brazil
T2 - Geological Society of America Bulletin
UR - http://gsabulletin.gsapubs.org/content/124/5-6/746.full
VL - 124
ER -