Abstract
Isotope chronostratigraphy is now a proven form of chemical stratigraphy for high-resolution stratigraphic correlations in late Miocene through Pleistocene sections of exploration wells from the northern Gulf of Mexico (GOM). Detailed oxygen and carbon isotope records from wells spanning the GOM margin from Mississippi Canyon to East Breaks permit the development of a GOM type chemical stratigraphic section. The use of modern techniques of signal-to-noise identification enable us to compare our regional GOM type section to the global isotope record derived from deep-sea sections using coherence, auto-correlation, cross-correlation, and spectral analysis. These quantitative techniques enables us to recognize nearly 200 oxygen and carbon isotope zones or stages in the Piocene-Pleistocene. This chemical stratigraphy zonation offers unparalleled, fine-scaled correlation and depositional modeling of exploration wells. Removal of the global isotope signal from the regional GOM record permit us to determine the effects of meltwater-fluvial discharge episodes and regional sea level fluctuations on sedimentation along the GOM margin.
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