Geotechnical and physical properties from whole-round consolidations samples of ODP Leg 110 holes (Table 1)


Sediments cored from the Barbados Ridge accretionary complex at ODP Sites 671, 672, and 676 are progressively underconsolidated with depth. Very low measured intergranular permeabilities contribute substantially to the probable excess pore-water pressures that account for the underconsolidated behavior. The estimated pore pressures immediately overlying the incipient decollement at the reference site are nearly equal to the overburden stress. Data show that the pore fluids within the fine-grained sediments of the complex are absorbing the tectonic shock of underthrusting as they are accreted, effectively leading to "lubricated subduction" of the underthrust Oligocene and older sediments. Lateral compression and dewatering by fracture permeability is taking place in the accreted section despite apparent underconsolidation, resulting in limited pore-volume reduction and sediment strengthening from east to west on the ridge.

Supplement to: Taylor, Elliott; Leonard, John (1990): Sediment consolidation and permeability at the Barbados Forearc. In: Moore, JC; Mascle, A; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 110, 289-308

Related Identifier
Metadata Access
Creator Taylor, Elliott; Leonard, John
Publisher PANGAEA
Publication Year 1990
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 874 data points
Discipline Earth System Research
Spatial Coverage (-58.810W, 15.525S, -58.641E, 15.540N); South Atlantic Ocean
Temporal Coverage Begin 1986-06-27T08:15:00Z
Temporal Coverage End 1986-08-14T00:30:00Z