Date of Award
Spring 5-2019
Degree Type
Thesis
Degree Name
M.S.
Degree Program
Earth and Environmental Sciences
Department
Earth and Environmental Sciences
Major Professor
Kulp, Mark A.
Second Advisor
McLindon, Chris
Third Advisor
Robison, Brad A.
Abstract
An in-depth field study of the Delacroix Island producing field illustrates the evolution of the east-trending Delacroix Island Fault during the last 13 My. Well log correlations and 3-D seismic interpretation of 22 subsurface bio-stratigraphic horizons across the fault reveal variable stratigraphic thicknesses and displacement. Wells, with well log curve data as shallow as 31 m (100 ft) below the surface, were used to calculate interval thicknesses, expansion indices, sediment accumulation rates, burial history and magnitudes of displacement. Through these analyses, a correlation was found between the positioning of ancient Miocene depocenters over Delacroix Island and a period of increased fault activity. Historic satellite imagery (last 34 yrs) of the field depicts a lineation on the modern marsh surface coincident with the upward projected fault plane. Continuous wetland loss on the downthrown side of the fault trace suggests that recent and continued fault movement may be contributing to marsh submergence.
Recommended Citation
Levesh, Jarrett Leigh, "Middle Miocene to Holocene History of the Delacroix Island Fault System" (2019). University of New Orleans Theses and Dissertations. 2623.
https://scholarworks.uno.edu/td/2623
Included in
Geology Commons, Geomorphology Commons, Stratigraphy Commons, Tectonics and Structure Commons
Rights
The University of New Orleans and its agents retain the non-exclusive license to archive and make accessible this dissertation or thesis in whole or in part in all forms of media, now or hereafter known. The author retains all other ownership rights to the copyright of the thesis or dissertation.