Ocean Drilling Program hole 504B revealed a hydrothermal sulphur anomaly on the dyke-lava transition. This dataset contains sulfur concentration and isotope data from a 7.5km section of the Macquarie Ridge at Macquarie Island, a 39-9.7 Ma slow-spreading setting, with background pyrite sulfur averaging 1845 ppm and fault zones averaging 5000-11000 ppm. Data was contributed by the Australian Antarctic Data Centre (AU_AADC) and last updated in March 1998.
Use Cases
- Modeling global sulfur sinks based on sulfur concentration anomalies in fault zones.
- Analyzing the structural control of hydrothermal deposition based on descriptions of fault arrays and breccias.
- Studying sulfur isotope patterns to understand fluid-rock interactions in slow-spreading ridge settings.
- Reassessing the magnitude of the dyke-lava transition sulfur sink based on heterogeneity data from Macquarie Island.
Strengths
- Includes specific sulfur concentration measurements, with background levels averaging 1845 ppm and fault zones between 5000-11000 ppm.
- Covers a spatially significant 7.5km section of the dyke-basalt contact on Macquarie Ridge.
- Provides geological context for a rare hydrothermal sulfate occurrence in mid-ocean ridge crust.
Limitations
- Last updated 1998-03-31 23:59:59.999000; freshness should be verified.
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
Provenance
- Source
- Australian Antarctic Data Centre (AU_AADC), ASAC Project 2212
- Collection Method
- Field sampling and analysis of oceanic crust on Macquarie Island, likely involving geochemical assays.
- Time Range
- Covers crust formed during a 39-9.7 Ma period.
- Freshness
- 1998-03-31 23:59:59.999000
- Geography
- Macquarie Island, specifically the Macquarie Ridge and the east coast near Nuggets Point.