Choi, Sarang; Park, Jung-Woo; Im, Sunghwan; Kim, Wonnyon; Choi, Sun Ki: Quantitative digital image analysis dataset of macroscopic dilation and hydrothermal vein area fractions in talc-rich metasomatites from the Onnuri Oceanic Core Complex, Central Indian Ridge [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996126 (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:
Quantitative structural data containing vein area fractions (AA) and calculated macroscopic bulk volume changes (ΔV) were obtained from rock specimens collected during the 2022 R/V ISABU expedition at the Onnuri Oceanic Core Complex (11°25′S, Central Indian Ridge). The aim was to physically constrain and quantify the net volumetric dilation associated with intense, non-deformational static silica metasomatism at mafic–ultramafic interfaces. Hand specimen photographs of representative talc-rich metasomatites were processed using ImageJ software (v.1.53k). Thicker V1 vein boundaries were manually traced, and images were converted to 8-bit grayscale for binary threshold segmentation to isolate combined hydrothermal vein networks (V1 + V2) from the host rock matrix. Bulk volume changes were subsequently computed using the Delesse area-to-volume equivalence principle.
Keyword(s):
Coverage:
Latitude: -11.420833 * Longitude: 66.407000
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Choi, Sarang | Geocode | |
| 2 | Lithology/composition/facies | Lithology | Choi, Sarang | |||
| 3 | Sample number | Sample no | Choi, Sarang | |||
| 4 | Vein area fraction | AA | Choi, Sarang | ImageJ software | ||
| 5 | Volume change, macroscopic bulk | ΔV | Choi, Sarang | ImageJ software | ΔV = AA / (1 - AA |
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:
19 data points