Choi, Sarang; Park, Jung-Woo; Im, Sunghwan; Kim, Wonnyon; Choi, Sun Ki: Composite geochemical inputs and modal mineral proportions used for thermodynamic phase equilibrium modeling of Onnuri OCC hydrothermal veins [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996131 (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:
Digital image segmentation data representing mineral area percentages and integrated end-member bulk chemical inputs utilized for thermodynamic T–X pseudosection paths were developed to model the spatial hydrothermal zonation at the Onnuri Oceanic Core Complex detachment interface, Central Indian Ridge. The aim was to compute an accurate bulk geochemical input (C_bulk) for direct fluid precipitates (V1 and V2 vein conduits) to reconstruct mineral stability fields in open-system hydrothermal regimes. High-resolution quantitative EDX elemental mapping was segmented in ImageJ to calculate the area fraction (Area%i) of constituent phases in the V1 core (chlorite: 39.14%, talc: 23.29%, tremolite: 37.57%). Bulk compositions were generated using a weighted average formula: C_bulk = Σ(Area%i × Ci), combining modal data with mean EPMA oxide concentrations (Ci). The V2 end-member was framed using a representative 50:50 tremolite:talc structural model.
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 Elevation: -3133.0 m * Maximum Elevation: -2045.0 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 | Mineral phase | Mineral phase | Choi, Sarang | |||
| 2 | Texture | Texture | Choi, Sarang | Textural domain | ||
| 3 | Silicon dioxide | SiO2 | % | Choi, Sarang | wt. % | |
| 4 | Titanium dioxide | TiO2 | % | Choi, Sarang | wt. % | |
| 5 | Aluminium oxide | Al2O3 | % | Choi, Sarang | wt. % | |
| 6 | Chromium(III) oxide | Cr2O3 | % | Choi, Sarang | wt. % | |
| 7 | Iron oxide, FeO | FeO | % | Choi, Sarang | wt. % | |
| 8 | Manganese oxide | MnO | % | Choi, Sarang | wt. % | |
| 9 | Magnesium oxide | MgO | % | Choi, Sarang | wt. % | |
| 10 | Calcium oxide | CaO | % | Choi, Sarang | wt. % | |
| 11 | Sodium oxide | Na2O | % | Choi, Sarang | wt. % | |
| 12 | Total | Total | % | Choi, Sarang | wt. % | |
| 13 | Area | Area | % | Choi, Sarang |
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:
89 data points