Mössbauer spectroscopy and x-ray diffraction studies analyze iron mineralogy in desert varnish, lava flows, and Dry Valley soils. Data originates from field campaigns across the McMurdo Sound region, including Ross Island and the Taylor Valley. The dataset was compiled by SCIOPS and last updated in 1978.
Use Cases
- Classify bedrock type (e.g., dolerite, granite, sandstone) based on Mössbauer spectroscopic data of desert varnish coatings.
- Correlate lava flows from locations like Cape Royds using crystallographic parameters from x-ray diffraction of feldspar crystals.
- Determine soil formation extent and secondary iron oxide mineralogy in Dry Valley soils via Mössbauer spectroscopy.
- Analyze cation distribution in olivine samples from Crater Hill to infer the cooling history of volcanic features.
Strengths
- Data includes multiple analytical methods: Mössbauer spectroscopy, x-ray diffraction, and nuclear microprobe analysis.
- Samples collected from diverse Antarctic locations including Depot Nunatak, Beacon Valley, and the Olympus Range.
- Investigates three distinct study components: desert varnish, Erebus lava flows, and Dry Valley bedrock/soils.
Limitations
- Dataset is temporally stale, with no updates since 1978, limiting modern comparative analysis.
- Sample size and specific row/column counts are unknown, making statistical robustness unclear.
- Geographic scope is limited to the specific McMurdo Sound region, not representative of the entire continent.
Provenance
- Source
- SCIOPS via NASA EarthData.
- Collection Method
- Field sample collection and subsequent laboratory analysis using spectroscopic and diffraction techniques.
- Time Range
- null
- Freshness
- 1978-01-10
- Geography
- McMurdo Sound region, Antarctica, including Ross Island, Dry Valleys (e.g., Taylor Valley), and Victoria Valley.