Core scan image analysis corrected for cracks, ODP Hole 154-926C

Drill cores are essential for the study of deep-sea sediments and on-land sites because often no suitable outcrop is available or accessible. These cores form the backbone of stratigraphical studies using and combining various dating techniques. Cyclostratigraphy is usually based on fast and inexpen...

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Bibliographic Details
Main Authors: Zeeden, Christian, Hilgen, Frederik J, Röhl, Ursula, Seelos, Klemens, Lourens, Lucas Joost
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
154-926C
DeCrack routine
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Greyscale value
Joides Resolution
Leg154
Multi-Sensor Core Logger (MSCL)
GEOTEK
North Atlantic Ocean
Ocean Drilling Program
ODP
Sample code/label
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.848008
https://doi.org/10.1594/PANGAEA.848008
Description
Summary:Drill cores are essential for the study of deep-sea sediments and on-land sites because often no suitable outcrop is available or accessible. These cores form the backbone of stratigraphical studies using and combining various dating techniques. Cyclostratigraphy is usually based on fast and inexpensive measurements of physical sediment properties. One indirect but highly valuable proxy for reconstructing the sediment composition and variability is sediment color. However, cracks and other disturbances in sediment cores may dramatically influence the quality of color data retrieved either directly from photospectrometry or derived from core image analysis. Here we present simple but powerful algorithms to extract color data from core images, and focus on routines to exclude cracks from these images. Results are discussed using the example of an ODP core from the Ceara Rise in the Central Atlantic. The crack correction approach presented highly improves the quality of color data and allows the easy incorporation of cracked cores into studies based on core images. This facilitates the quick and inexpensive generation of large color datasets directly from quantified core images, for cyclostratigraphy and other purposes.

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