Stratigraphic evolution of a high-relief slope clinoform syste, Magallanes Basin, Chilean Patagonia
Date
2012
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Abstract
Upper Cretaceous-Paleogene strata that crop-out in southern Chile, including the Tres Pasos and Dorotea formations, record the final infill of the deep-water Magallanes foreland basin. A depositional dip-oriented exposure of a shelf to slope system that had >900 m of paleobathymetric relief has been ??apped over 200 km2• The stratigraphic framework for the large-scale depositional system is grounded with detailed sedimentological analyses. Stratigraphic architecture characterized by progradational clinoforms is punctuated by two over-steepened slope surfaces that are characterized by substantial evidence for sediment bypass of the slope, and deep-water sand accumulation. Dominant shelf processes (e.g., waves, tides, etc.) and shelf-edge evolution, or trajectory, had a minor impact on the delivery of sand and gravel beyond the shelf-edge relative to the role of margin readjustment in which over-steepened conditions developed. Outcrop observations provide realistic insight into reservoir distribution and characteristics in analogous hydrocarbon-prone clinoform systems.
Description
Bibliography: p. 7-10, 59-66,105-120
Many pages are in colour.
Many pages are in colour.
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Citation
Bauer, D. B. (2012). Stratigraphic evolution of a high-relief slope clinoform syste, Magallanes Basin, Chilean Patagonia (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/4898