Purpose
Tools
The workflow for the correlation of stratigraphic records obtained from scientific ocean drilling cores requires multiple applications.
Table 1. Tasks and tools for stratigraphic correlation on and off the JOIDES Resolution.
| Task | Data types | Tool on JR | Applicable on shore? | User guide |
|---|---|---|---|---|
| Prepare data for correlation | Non-image data | Correlation Downloader | Not a this time. Use already prepared data or ask JRSO staff for help. | |
| Image data | LORE (LIMS Online Reports) | Yes | ||
| ImageRedux: cull and resample images (R script) | Yes | |||
| Correlate: shift cores and splice core segments | All non-image and image data | Correlator app | Yes | |
| Load shift offsets and splice interval data to the LIMS database | Affine tables Splice interval tables | SCORS Uploader and Manager | Yes but requires credentials to write to the LIMS database (and approval by project manager) | |
| Download data with CCSF (core composite depth below seafloor) depths | All data accessible from the LIMS database | LORE (LIMS Online Reports) | Yes |
Figure 1-1. Stratigraphic correlation support (SCORS) workflow and tools.
Correlation Downloader
Download core logging data from the LIMS database for use in Correlator.
- Automatically downloads relevant section summary data required for accurate computations in Correlator.
- Options to filter the data for edges and outliers.
- Feature to append new core data iteratively to hole files.
LORE (get correlation data)
Batch-download section half images for use in Correlator.
ImageRedux
Batch-process the images, cropping the peripheral ~1 cm from the images and reducing the image to ~200 kb, suitable for Correlator.
Correlator
Stratigraphic correlation of cores from multiple holes at a drill site, by
- depth shifting cores using high-resolution core logging data to construct a core composite depth below sea floor (CCSF) depth scale;
- splicing selected core intervals to construct the most complete stratigraphic representation possible at a site.
Correlator can be used as a stand-alone application, but efficacy and support is maximized when it is used in conjunction with the SCORS support applications in the JRSO LIMS infrastructure.
SCORS Uploader and Manager
Load affine tables and splice interval tables created by an external application (e.g., Correlator) to the LIMS database where the information can be reported and applied to all data in LIMS.
LORE again (get correlated data)
Provide (A) lists of existing affine tables and splice interval tables, with links to uploaded user files; (B) detailed, LIMS-computed affine and splice interval tables; (C) CCSF (alternate) depths for any data set in the LIMS; and (D) data sets by selected splice.