Choi, Sarang; Park, Jung-Woo; Im, Sunghwan; Kim, Wonnyon; Choi, Sun Ki: Whole-Rrock major oxide geochemistry and titrated ferrous iron (Fe2+) dataset of hydrothermally altered serpentinites and metasomatites from the Onnuri Oceanic Core Complex [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996098 (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:
Whole-rock major element concentrations (wt.%), loss on ignition (LOI), and titrated ferrous iron (FeO) measurements were used to establish total iron oxidation states (Fe³⁺/Fe_total). Samples were collected from seafloor detachment surfaces 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 characterize the bulk-rock geochemical transition, hydration states, and chemical redox fluctuations associated with the pervasive replacement of background serpentinites into talc-rich suites. Pulverized rock powders (400 mesh) were analyzed at Actlabs (Canada). Major oxide abundances were determined by lithium metaborate/tetraborate fusion followed by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), whereas ferrous iron (FeO) contents were independently quantified using cold acid digestion (V₂O₅-HF) and subsequent potassium dichromate colorimetric titration.
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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
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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:
280 data points