Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of discrete samples recording the Laschamp excursion in Core MD07-3076 recovered during Marion Dufresne cruise VT90/SOUC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.926797
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Abstract:
Component declination and inclination, determined from stepwise alternating field demagnetization data recording the Laschamp excursion from discrete (2x2 cm²) samples from Core MD07-3076 (see Channell et al., 2017). Age models for records of the Laschamp and Iceland Basin excursions were derived from radiocarbon dates, and from matching sea-surface temperature records to Antarctic (EPICA) air-temperature records from ice cores. The onset of the Laschamp excursion occurred during Antarctic Isotopic Maximum (AIM) 10, consistent with its occurrence during Greenland Interstadial 10. The end of the Laschamp excursion occurred prior to AIM 9 in Greenland Stadial 10. The age model is supported by synchroneity of directional and relative paleointensity manifestations of the Laschamp excursion in the marine core with peaks in EPICA10Be and nitrate flux. The Iceland Basin excursion is synchronous with the final phase of the transition from marine isotope stage (MIS) 7a to MIS 6e as recorded in the EPICA δD record. The onset of the Laschamp and Iceland Basin excursions, defined here by component inclinations >-40°, occurred at 41.4 ka and 190.0 ka, and durations are ~1 kyr and ~ 3.5 kyr, respectively, although these estimates depend on the criteria used to define the directional excursions. By comparison with Laschamp and Iceland Basin excursion records from the North Atlantic Ocean, the two excursions are synchronous at centennial timescales between the two hemispheres, based on synchronization of the GICC05 and AICC2012 age models for Greenland and Antarctic ice cores.
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Related to:
Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2017): Age and duration of Laschamp and Iceland Basin geomagnetic excursions in the South Atlantic Ocean. Quaternary Science Reviews, 167, 1-13, https://doi.org/10.1016/j.quascirev.2017.04.020
Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of discrete samples recording the Iceland Basin excursion in Core MD07-3077 recovered during Marion Dufresne cruise VT90/SOUC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.926787
Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of u-channel samples recording the Iceland Basin excursion in Core MD07-3077 recovered during Marion Dufresne cruise VT90/SOUC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.926795
Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus component declination and inclination of natural remanent magnetization (NRM) of u-channel samples recording the Laschamp excursion in Core MD07-3076 recovered during Marion Dufresne cruise VT90/SOUC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.926796
Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus two relative paleointensity proxies (slopes of NRM/ARM and NRM/IRM) for u-channel samples from Core MD07-3076 recovered during Marion Dufresne cruise VT90/SOUC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.926798
Channell, James E T; Vázquez Riveiros, Natalia; Gottschalk, Julia; Waelbroeck, Claire; Skinner, Luke C (2021): Age versus two relative paleointensity proxies (slopes of NRM/ARM and NRM/IRM) for u-channel samples from Core MD07-3077 recovered during Marion Dufresne cruise VT90/SOUC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.926799
Coverage:
Median Latitude: -43.766459 * Median Longitude: -26.240421 * South-bound Latitude: -53.613486 * West-bound Longitude: -70.930036 * North-bound Latitude: -33.919433 * East-bound Longitude: 18.449194
Date/Time Start: 2007-01-19T00:00:00 * Date/Time End: 2007-02-05T00:00:00
Event(s):
VT90/SOUC_track * Latitude Start: -33.919433 * Longitude Start: 18.449194 * Latitude End: -53.613486 * Longitude End: -70.930036 * Date/Time Start: 2007-01-19T00:00:00 * Date/Time End: 2007-02-05T00:00:00 * Campaign: VT90/SOUC * Basis: Marion Dufresne (1995) * Method/Device: Underwater vehicle
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | AGE | Age | ka BP | Channell, James E T | see description in data abstract | Geocode |
| 2 | Declination | Decl | deg | Channell, James E T | see Channell et al. (2017) | Discrete sample (2x2 cm²) |
| 3 | Inclination | Incl | deg | Channell, James E T | see Channell et al. (2017) | Discrete sample (2x2 cm²) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
44 data points