The Dufek Intrusion dataset from AMD_USAPDC focuses on a large exposed magma chamber in Antarctica. It likely contains high-precision U-Pb zircon ages, crystallization temperature data, and isotopic compositions (Hf, Sr, Nd, Pb) from samples across the intrusion. The dataset was last updated on 2024-12-31.
Use Cases
- Testing cooling profile hypotheses based on zircon age distribution across stratigraphy.
- Comparing isotopic compositions to determine genetic relationships between suspected separate intrusions.
- Constructing thermal models of emplacement and cooling based on crystallization temperature and cooling rate data.
- Providing constraints on the duration of magmatism associated with continental breakup.
Strengths
- Focuses on a rare, fully exposed magma chamber, the Dufek Intrusion.
- Includes high-precision U-Pb zircon ages from throughout the intrusion.
- Data supports testing of two competing geological hypotheses.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data may reflect geographic bias inherent to nasa_earthdata, being specific to Antarctica.
Provenance
- Source
- AMD_USAPDC
- Collection Method
- Analysis of existing rock samples from the Dufek Intrusion.
- Time Range
- Related to magmatic event approximately 182 million years ago.
- Freshness
- Last updated 2024-12-31 23:59:59.999000; freshness should be verified.
- Geography
- Antarctica, specifically the Dufek Intrusion.