Kosters, Martha E; de Boer, Rosa A; Out, Frenk; Cortés-Ortuño, David Ignacio; de Groot, Lennart Vincent (2023): Magnetic surface flux data and spatial information of magnetic grains from a Hawaiian lava and results of using this data for Micromagnetic Tomography [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.955725
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2023-02-15 • DOI registered: 2023-02-20
Abstract:
Micromagnetic Tomography is a new technique which combines magnetic surface scan of a sample with spatial information (shape, location) of magnetic grains. Combining these two datasets enables us to overcome the non-uniqueness in the inversion and thus we can allocate magnetizations to individual grains that best reproduce the magnetic surface scan. This is a step into understanding how magnetic fields are recorded in magnetic grains, which is relevant for the field of paleomagnetism.
Keyword(s):
Related to:
Kosters, Martha E; de Boer, Rosa A; Out, Frenk; Cortés-Ortuño, David Ignacio; de Groot, Lennart Vincent (2023): Unraveling the Magnetic Signal of Individual Grains in a Hawaiian Lava Using Micromagnetic Tomography. Geochemistry, Geophysics, Geosystems, 24(4), e2022GC010462, https://doi.org/10.1029/2022GC010462
Project(s):
Funding:
European Commission (EC), grant/award no. 851460: Paleomagnetism and rock-magnetism by Micro-Magnetic Tomography
Coverage:
Latitude: 19.071900 * Longitude: 155.738600
Event(s):
HW03 * Latitude: 19.071900 * Longitude: 155.738600 * Location: North Pacific Ocean, western part * Method/Device: Rock sample (ROCK) * Comment: Lava cooled in 1907
Comment:
The data in this repository consists of three parts; (1) the magnetic surface scan, (2) the spatial data and (3) the raw dataset. The orientation and scale of file 1 matches the orientation and scale of file 2. This means that using file 1 and 2, an inversion for the magnetic grains can be performed. If the exact same procedure is used as described in the manuscript this dataset is supplement to, then the magnetizations from file 3 can be reproduced. The magnetizations in file 3 can also be filtered and interpreted to reproduce various figures from the manuscript.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Binary Object | Binary | Kosters, Martha E | Micromagnetic Tomography (MMT) | ||
| 2 | File content | Content | Kosters, Martha E | Micromagnetic Tomography (MMT) | ||
| 3 | File content | Content | Kosters, Martha E | Micromagnetic Tomography (MMT) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
9 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.
| 1 Binary | 2 Content | 3 Content |
|---|---|---|
| Bzup_OrgQDM_rotated.csv | 1) The rotated magnetic surface scan | Matrix of 1921 x 1309 datapoints from the magnetic surface scan. Each datapoint represents the magnetic flux in vertical direction (positive pointing out of surface). Measured: 18 January 2018 at Harvard University. Resolution: the QDM scan was done with stepsize of 1.2 micrometer. |
| Cuboids_scaled.csv | 2) The Cuboids file | List of cuboids per grain for the entire 1873 grains that were scanned using the MicroCT. Measured: February 2018 at TU Delft. Voxelsize: 0.75 micrometer cubed. |
| Results_from_MMT.csv | 3) Raw dataset | List of all 261306 solutions from the grains that are fully within the FOV of the individual subarea. Each grain was present in multiple tiles, thus there are multiple solutions per grain. |