Seismic-scale Expression of Fluid Sourcing, Circulation and Expulsion in Sedimentary Series

Subsurface sediment remobilization has been recognized for at least a decade as a significant phenomenon in a number of<br>sedimentary basins. Many types of anomalies have since that time been described and interpreted as evidence of the<br>interaction between buried sediments and compaction fluids expelled through them, generally upwards. This paper proposes<br>a way to classify these features according to the role they play with respect to compaction fluids: some of them correspond to<br>fluids being supplied to the sedimentary column (e.g. “polygonal faults” or diagenetic horizons), while others indicate<br>deformation by ascending fluids (like sand injectites), and others yet the expulsion of the fluids at seafloor level (e.g. mud<br>volcanoes or pockmarks).