(Table 1) Core intervals of sediment core CRP-3 that have been stitched and reorientated to North

CRP-3 cores were not orientated with respect to North during coring operations. However, borehole televiewer (BHTV) logging did obtain azimuthally orientated images of the borehole wall, and core processing included digital imaging of the outer surface of 85% of the cores. Images of many individual...

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Bibliographic Details
Main Authors: Jarrard, Richard D, Paulsen, Timothy S, Wilson, Terry
Format: Dataset
Language:English
Published: PANGAEA 2001
Subjects:
Angle
Cape Roberts Project
Confidence
Core wireline system
CRP
CRP-3
CWS
Depth
bottom/max
sediment/rock
top/min
Number of observations
Ross Sea
Sampling/drilling from ice
Standard deviation
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.465903
https://doi.org/10.1594/PANGAEA.465903
Description
Summary:CRP-3 cores were not orientated with respect to North during coring operations. However, borehole televiewer (BHTV) logging did obtain azimuthally orientated images of the borehole wall, and core processing included digital imaging of the outer surface of 85% of the cores. Images of many individual core segments can be digitally joined, or stitched, by rotating them to match the shapes of their adjoining surfaces and then closing the gap. By aligning features (fractures, bedding, and clasts) on stitched-core images with correlative features on orientated BHTV images, we reorientated 231 m of core, or 25% of the cored interval. We estimate that the orientation uncertainty is ±10° for entire stitched-core intervals, and ±15° for individual features such as a single fracture or palaeomagnetic sample. Reliability of core orientations was confirmed by comparing azimuths of bedding and fractures measured directly within these reorientated cores to those measured within orientated borehole televiewer images.

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