Heterogeneity of the middle crust: Implications for strength of continental lithosphereGeology (1998)
AbstractBorehole logs from the northern Barbados accretionary prism show that the plate-boundary decollement initiates in a low-density radiolarian claystone. With continued thrusting, the decollement zone consolidates, but in a patchy manner. The logs calibrate a three-dimensional seismic reflection image of the decollement zone and indicate which portions are of low density and enriched in fluid, and which portions have consolidated. The seismic image demonstrates that an underconsolidated patch of the decollement zone connects to a fluid-rich conduit extending down the decollement surface. Fluid migration up this conduit probably supports the open pore structure in the underconsolidated patch.
Publication DateJanuary 1, 1998
Citation InformationKE Karlstrom and ML Williams. "Heterogeneity of the middle crust: Implications for strength of continental lithosphere" Geology Vol. 26 Iss. 9 (1998)
Available at: http://works.bepress.com/michael_williams/23/