Choi, Sarang; Park, Jung-Woo; Im, Sunghwan; Kim, Wonnyon; Choi, Sun Ki: Rock magnetic properties and quantitative magnetite abundance dataset of the serpentinite-to-metasomatite transition at the Onnuri Oceanic Core Complex [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996099 (dataset in review), In: Choi, S et al.: Geochemical, Mineral Chemical, and Petrological Dataset of Serpentinites and Talc-Rich Metasomatites from the Onnuri Oceanic Core Complex, Central Indian Ridge [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996097 (dataset in review)
Abstract:
Saturation magnetization (Ms) measurements and derived quantitative bulk magnetite concentrations (wt.%) were conducted on rock suites exhumed along the detachment faults of the Onnuri Oceanic Core Complex, Central Indian Ridge, during the 2019 and 2022 R/V ISABU dredge operations (RD1912, RD1913, RD2208). The aim was to investigate the geophysical consequences of silica-driven fluid overprinting, specifically by tracking the destabilization and destruction of magnetic carriers formed during prior serpentinization. Rock powders (0.15–0.44 g) were analyzed using a Princeton MicroMag 3900 Vibrating Sample Magnetometer (VSM) at the Korea Institute of Geoscience and Mineral Resources (KIGAM). Hysteresis loops were measured under a maximum applied magnetic field of 1 T to extract saturation magnetization (Ms). Magnetite weight fractions were quantified by normalizing specimen Ms values against the reference saturation magnetization of stoichiometric magnetite (92.36 Am²/kg).
Keyword(s):
Coverage:
Median Latitude: -11.420718 * Median Longitude: 66.401321 * South-bound Latitude: -11.428260 * West-bound Longitude: 66.378405 * North-bound Latitude: -11.413095 * East-bound Longitude: 66.421243
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
RD1912_DREG * Latitude Start: -11.413095 * Longitude Start: 66.418228 * Latitude End: -11.414573 * Longitude End: 66.421243 * Elevation Start: -2162.0 m * Elevation End: -2045.0 m * Method/Device: Dredge (DRG) * Comment: Geomorphology: Detachment fault surface. Lithology: Diabase, Gabbro, Serpentinite
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Choi, Sarang | |||
| 2 | Lithology/composition/facies | Lithology | Choi, Sarang | |||
| 3 | Sample number | Sample no | Choi, Sarang | |||
| 4 | DEPTH, sediment/rock | Depth sed | m | Choi, Sarang | Geocode | |
| 5 | Magnetization saturation | Ms | Am2/kg | Choi, Sarang | Vibrating Sample Magnetometer (VSM), Princeton, MicroMag 3900 | |
| 6 | Magnetite | Fe3O4 | % | Choi, Sarang | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
288 data points