Abstract

Point-bar sediments in deltaic environments and in close proximity to barrier-island deposits may contain two oxidation cells. One of these cells will generally be very narrow (less than 100 ft), contained within the channel-fill subenvironment and should be recognizable from the color of cuttings. The other will be within the accretion-set subenvironment and may show only subtle color differences which can make recognition of oxidation from cuttings very difficult. Recognition of the geometries of the point-bar subenvironments and delineation of the associated redox fronts could ensure that small ore pods or subtle oxidation would not be missed. Pit-wall mapping was correlated with resistance log character.--Modified journal abstract.

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