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
Data
| 1 Event | 2 Lithology | 3 Sample no | 4 Depth sed [m] | 5 Ms [Am2/kg] | 6 Fe3O4 [%] |
|---|---|---|---|---|---|
| RD1912_DREG | Serpentinite | RD1912-04 | 0 | 2.459 | 2.66 |
| RD1912_DREG | Serpentinite | RD1912-04 | 0 | 2.562 | 2.77 |
| RD1912_DREG | Serpentinite | RD1912-04 | 0 | 2.622 | 2.84 |
| RD1912_DREG | Serpentinite | RD1912-04 | 0 | 2.525 | 2.73 |
| RD1912_DREG | Serpentinite | RD1912-12 | 0 | 2.984 | 3.23 |
| RD1912_DREG | Serpentinite | RD1912-12 | 0 | 2.645 | 2.86 |
| RD1912_DREG | Serpentinite | RD1912-12 | 0 | 2.756 | 2.98 |
| RD1912_DREG | Serpentinite | RD1912-12 | 0 | 3.076 | 3.33 |
| RD1912_DREG | Serpentinite | RD1912-13 | 0 | 3.070 | 3.32 |
| RD1912_DREG | Serpentinite | RD1912-13 | 0 | 3.262 | 3.53 |
| RD1912_DREG | Serpentinite | RD1912-13 | 0 | 3.451 | 3.74 |
| RD1912_DREG | Serpentinite | RD1912-13 | 0 | 3.442 | 3.73 |
| RD1912_DREG | Serpentinite | RD1912-16 | 0 | 2.993 | 3.24 |
| RD1912_DREG | Serpentinite | RD1912-16 | 0 | 3.094 | 3.35 |
| RD1912_DREG | Serpentinite | RD1912-16 | 0 | 2.998 | 3.25 |
| RD1912_DREG | Serpentinite | RD1912-16 | 0 | 3.098 | 3.35 |
| RD1913_DREG | Serpentinite | RD1913-02 | 0 | 2.501 | 2.71 |
| RD1913_DREG | Serpentinite | RD1913-02 | 0 | 2.533 | 2.74 |
| RD1913_DREG | Serpentinite | RD1913-02 | 0 | 2.699 | 2.92 |
| RD1913_DREG | Serpentinite | RD1913-02 | 0 | 2.689 | 2.91 |
| RD2208_DREG | Serpentinite | RD2208-10 | 0 | 4.532 | 4.91 |
| RD2208_DREG | Serpentinite | RD2208-10 | 0 | 4.576 | 4.95 |
| RD2208_DREG | Serpentinite | RD2208-10 | 0 | 4.660 | 5.05 |
| RD2208_DREG | Serpentinite | RD2208-10 | 0 | 4.563 | 4.94 |
| RD2208_DREG | Serpentinite | RD2208-10 | 0 | 4.427 | 4.79 |
| RD2208_DREG | Serpentinite | RD2208-10 | 0 | 4.601 | 4.98 |
| RD2208_DREG | Serpentinite | RD2208-11 | 0 | 2.461 | 2.67 |
| RD2208_DREG | Serpentinite | RD2208-11 | 0 | 2.550 | 2.76 |
| RD2208_DREG | Serpentinite | RD2208-11 | 0 | 2.399 | 2.60 |
| RD2208_DREG | Serpentinite | RD2208-11 | 0 | 2.347 | 2.54 |
| RD2208_DREG | Serpentinite | RD2208-11 | 0 | 2.399 | 2.60 |
| RD2208_DREG | Serpentinite | RD2208-11 | 0 | 2.501 | 2.71 |
| RD2208_DREG | Serpentinite | RD2208-39 | 0 | 4.031 | 4.36 |
| RD2208_DREG | Serpentinite | RD2208-39 | 0 | 3.909 | 4.23 |
| RD2208_DREG | Serpentinite | RD2208-39 | 0 | 4.038 | 4.37 |
| RD2208_DREG | Serpentinite | RD2208-39 | 0 | 3.964 | 4.29 |
| RD2208_DREG | Serpentinite | RD2208-39 | 0 | 3.965 | 4.29 |
| RD2208_DREG | Serpentinite | RD2208-39 | 0 | 3.998 | 4.33 |
| RD1913_DREG | Talc-serpentinite | RD1913-01 | 0 | 0.795 | 0.86 |
| RD1913_DREG | Talc-serpentinite | RD1913-01 | 0 | 0.705 | 0.76 |
| RD1913_DREG | Talc-serpentinite | RD1913-01 | 0 | 0.847 | 0.92 |
| RD1913_DREG | Talc-serpentinite | RD1913-01 | 0 | 0.907 | 0.98 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-04 | 0 | 0.015 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-04 | 0 | 0.015 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-04 | 0 | 0.017 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-04 | 0 | 0.015 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-04 | 0 | 0.014 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-04 | 0 | 0.017 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-12 | 0 | 0.019 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-12 | 0 | 0.019 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-12 | 0 | 0.018 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-12 | 0 | 0.019 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-12 | 0 | 0.021 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-12 | 0 | 0.020 | 0.02 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-13 | 0 | 0.603 | 0.65 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-13 | 0 | 0.614 | 0.66 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-13 | 0 | 0.618 | 0.67 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-13 | 0 | 0.570 | 0.62 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-13 | 0 | 0.584 | 0.63 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-13 | 0 | 0.575 | 0.62 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-38 | 0 | 0.049 | 0.05 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-38 | 0 | 0.047 | 0.05 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-38 | 0 | 0.038 | 0.04 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-38 | 0 | 0.058 | 0.06 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-38 | 0 | 0.061 | 0.07 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-38 | 0 | 0.042 | 0.05 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-43 | 0 | 0.149 | 0.16 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-43 | 0 | 0.151 | 0.16 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-43 | 0 | 0.154 | 0.17 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-43 | 0 | 0.147 | 0.16 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-43 | 0 | 0.149 | 0.16 |
| RD2208_DREG | Talc-rich metasomatite | RD2208-43 | 0 | 0.144 | 0.16 |