Hodson, Timothy O; Powell, Ross; Brachfield, Stefanie; Tulaczyk, Slawek; Scherer, Reed P; WISSARD Science Team (2016): 4.5. Principal Component Analysis calculation of best fit line for multiple demagnetization steps in order to determine the inclination and declination of SLW1 sediment cores [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.859984, In supplement to: Hodson, TO et al. (2016): Physical processes in Subglacial Lake Whillans, West Antarctica: inferences from sediment cores. Earth and Planetary Science Letters, 444, 56-63, https://doi.org/10.1016/j.epsl.2016.03.036
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Coverage:
Latitude: -82.375000 * Longitude: -168.625000
Minimum DEPTH, sediment/rock: 0.14 m * Maximum DEPTH, sediment/rock: 0.56 m
Event(s):
Comment:
Principal Component Analysis (PCA) calculation of best fit line for multiple demagnetization steps in order to determine the inclination and declination. 20, 30, 40, and 50 mT demagnetization steps. Only samples for which the maximum angular deviation (MAD value) is less than 5° are included. MAD is a goodness of fit parameter. Smaller MAD is better.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Hodson, Timothy O | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Hodson, Timothy O | Geocode | |
| 3 | Depth, top/min | Depth top | m | Hodson, Timothy O | ||
| 4 | Depth, bottom/max | Depth bot | m | Hodson, Timothy O | ||
| 5 | Demagnetization step | Demag step | mT | Hodson, Timothy O | Principal component analyses (PCA) | range minimum |
| 6 | Demagnetization step | Demag step | mT | Hodson, Timothy O | Principal component analyses (PCA) | range maximum |
| 7 | NRM, Inclination after demagnetization | Incl (AF) | deg | Hodson, Timothy O | Principal component analyses (PCA) | |
| 8 | NRM, Declination after demagnetization | Decl (AF) | deg | Hodson, Timothy O | Principal component analyses (PCA) | |
| 9 | Maximum angular deviation | MAD | deg | Hodson, Timothy O | Principal component analyses (PCA) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
28 data points
Data
| 1 Event | 2 Depth sed [m] | 3 Depth top [m] | 4 Depth bot [m] | 5 Demag step [mT] (range minimum) | 6 Demag step [mT] (range maximum) | 7 Incl (AF) [deg] | 8 Decl (AF) [deg] | 9 MAD [deg] |
|---|---|---|---|---|---|---|---|---|
| SLW1_SLW_MC3A | 0.16 | 0.15 | 0.17 | 20 | 50 | -40.9 | 161.6 | 5.4 |
| SLW1_PC1 | 0.14 | 0.13 | 0.15 | 20 | 50 | -79.5 | 232.2 | 2.1 |
| SLW1_PC1 | 0.18 | 0.17 | 0.19 | 20 | 50 | -87.1 | 124.1 | 4.1 |
| SLW1_PC1 | 0.56 | 0.55 | 0.57 | 20 | 50 | -49.5 | 169.9 | 5.0 |