How do basin margins record long-term tectonic and climatic changes?

A long-standing goal of sedimentary geoscience is to understand how tectonic and climatic changes are reflected in basin fill. Here, we use 14 numerical models of continental-scale sedimentrouting sys…

April 13, 2020 · J. Zhang, Z. Sylvester, J. A. Covault

Grain-Size and Discharge Controls on Submarine-Fan Depositional Patterns From Forward Stratigraphic Models

Submarine fans are important components of continental margins; they contain a stratigraphic record of environmental changes and host large accumulations of oil and gas. The grain size and volume of s…

December 13, 2019 · N. Hawie, J. A. Covault, Z. Sylvester

Submarine channels ‘swept’ downstream after bend cutoff in salt basins

Channel‐bend expansion and downstream translation, as well as vertical movements by aggradation and incision, set the stratigraphic architecture of channelized depositional systems. Early work on subm…

May 27, 2019 · J. A. Covault, Z. Sylvester, M. R. Hudec, C. Ceyhan, D. Dunlap

Conversion of tectonic and climatic forcings into records of sediment supply and provenance

Understanding how environmental forcings (e.g., tectonics, climate) are transformed by erosional landscapes into sedimentary signals is a critical component of inverting the stratigraphic record. Prev…

March 11, 2019 · G. R. Sharman, Z. Sylvester, J. A. Covault

Stratal patterns in salt-withdrawal minibasins

These are animations that accompany our 2015 article on the stratigraphy of salt-withdrawal basins on the slope (Sylvester, Z., Cantelli, A., and Pirmez, C., 2015, Stratigraphic evolution of intraslope minibasins: Insights from surface-based model: AAPG Bulletin, v. 99, no. 6, p. 1099–1129). We have used a simple model that investigates the interplay between subsidence and sedimentation and helps in the understanding of how stratal termination patterns relate to variations in sediment input and basin subsidence. Conventional sequence stratigraphy focuses on what is happening on the shelf and the shelf edge; and the origin of stratal patterns that characterize the typical ‘slug diagram’ are not trivial to relate to the three main parameters that influence continental-margin stratigraphy: changes in sea level, sediment supply, and subsidence. Our minibasin model is simpler because (1) it only has two parameters: sediment supply and subsidence (the impact of sea level - if any - is included in the sediment supply curve); and (2) sedimentary layers are deposited horizontally during each time step. The basic idea is to investigate the geometries of a system that consists of a depression that deepens through time and sediment is deposited in it with a certain rate. ...

July 18, 2018 · Zoltán Sylvester

Slope-fan depositional architecture from high-resolution forward stratigraphic models

Submarine fans in tectonically active continental-slope basins are targets of petroleum exploration and pro- duction. These slope fans commonly comprise compensationally stacked sandy and muddy archit…

February 2, 2018 · N. Hawie, J. A. Covault, D. Dunlap, Z. Sylvester