Consolidation patterns during initiation and evolution of a plate-boundary decollement zone: Northern Barbados accretionary prism
Geology
By: J.C. Moore, A. Klaus, N.L. Bangs, B. Bekins, C.J. Bucker, W. Bruckmann, S.N. Erickson, O. Hansen, T. Horton, P. Ireland, C.O. Major, Gregory F. Moore, S. Peacock, S. Saito, E.J. Screaton, J.W. Shimeld, P.H. Stauffer, T. Taymaz, P.A. Teas, and T. Tokunaga
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Abstract
Borehole 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.
Suggested Citation
Moore, J., Klaus, A., Bangs, N., Bekins, B., Bucker, C., Bruckmann, W., Erickson, S., Hansen, O., Horton, T., Ireland, P., Major, C., Moore, G.F., Peacock, S., Saito, S., Screaton, E., Shimeld, J., Stauffer, P., Taymaz, T., Teas, P., and Tokunaga, T., 1998, Consolidation patterns during initiation and evolution of a plate-boundary decollement zone: Northern Barbados accretionary prism: Geology, v. 26, no. 9, p. 811-814, https://doi.org/10.1130/0091-7613(1998)026<0811:CPDIAE>2.3.CO;2.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Consolidation patterns during initiation and evolution of a plate-boundary decollement zone: Northern Barbados accretionary prism |
| Series title | Geology |
| DOI | 10.1130/0091-7613(1998)026<0811:CPDIAE>2.3.CO;2 |
| Volume | 26 |
| Issue | 9 |
| Year Published | 1998 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 4 p. |
| First page | 811 |
| Last page | 814 |