Nine samples of carbonaceous shale and two coquinite samples from the Cretaceous Toolebuc Formation were analyzed using high-energy resolution fluorescence detection x-ray absorption spectroscopy. The results characterize uranium speciation, indicating a significant proportion (~20 to 30%) exists as U(VI) in reducing conditions. This abstract was presented at the 2023 Goldschmidt Conference and is hosted by Geoscience Australia.
Use Cases
- Modeling uranium adsorption and reduction processes based on oxidation state measurements.
- Improving hydrocarbon exploration models based on uranium enrichment patterns in organic-rich shales.
- Assessing environmental risks of uranium mobilization by groundwater based on its speciation and distribution.
- Correlating uranium redox state with depositional environment conditions like anoxia or dysoxia.
Strengths
- Analysis includes specific total organic carbon (TOC) content ranges from 0.3 to 13.4 wt%.
- Uranium oxidation state is characterized at multiple scales, from mm to nanoscale, using techniques like NanoSIMS.
- Dataset is associated with a peer-reviewed scientific conference abstract (Goldschmidt 2023).
Limitations
- Row count is unknown, which may limit suitability assessment.
- Column-level documentation is absent; field semantics must be inferred after download.
- Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- High-energy resolution fluorescence detection (HERFD) x-ray absorption spectroscopy and nanoscale secondary ion mass spectrometry (NanoSIMS) on sediment samples.
- Time Range
- Cretaceous period (geological samples)
- Freshness
- Last updated 2026-04-30 14:44:00.056260; freshness should be verified.
- Geography
- Toolebuc Formation, Eromanga Basin, Australia