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Digital core images offer the highest resolution realization of core properties available to scientific investigators. The digital core scanner used aboard the JOIDES Resolution during Integrated Ocean Drilling Program Expedition 303 captured ~10 pixels per millimeter of core. The ocean drilling community, however, has been slow to utilize these digital data as other than highly detailed pictures. In this study we illustrate a fast and simple method to extract core images as depth-scaled digital data. These data can then be manipulated through image enhancement to highlight detail not easily recognized in the original image or cores. Other data such as multisensor track core scans can be easily overlain on the images. We use digital core images to examine core distortion by developing sets of tables for five Expedition 303 sites that precisely map features in the site composite to those same features in individual cores from each hole at that site. In general, results show that in 80% of instances features within the composite section line up to within 35 cm of the same features in sections not used for the composite.

Data report: digital core images as data: an example from IDOP Expedition 303