Geochemical data investigates beryllium's role in partial melting of the lower continental crust within the Archean Napier Complex. The study includes electron microprobe age determinations showing micrometer-scale heterogeneity, with chemical ages from 5 micrometer spots varying from 2352 +/-85 Ma to 800 +/-40 Ma. Research was conducted by SCIOPS and sourced from NASA's EarthData platform.
Use Cases
- Analyze the relationship between beryllium content and partial melting processes in lower crustal rocks.
- Model lead diffusion and loss using Th, U, and Pb compositional maps from monazite-(Ce) grains.
- Correlate monazite chemical variation (e.g., up to 28 wt% ThO2) with apparent age domains ranging from ~2400 Ma to 800 Ma.
- Study the enrichment of Pb in alkali feldspars (0.2 to 9.9 wt% PbO) contiguous to monazite-(Ce) grains.
- Characterize the new beryllosilicate mineral makarochkinite (Ca2Fe2+4Fe3+TiSi4BeAlO20) within the rock samples.
Strengths
- Includes detailed micrometer-scale geochemical and age data from electron microprobe analysis.
- Covers a significant geological time range, referencing events from 3800 Ma to ~520 Ma.
Limitations
- Sample size and specific row/column counts are unknown.
- Data format and structure are unspecified, requiring extraction from descriptive text.
- Geographic coverage is limited to specific Antarctic locations like Khmara Bay.
Provenance
- Source
- NASA EarthData, with research organization SCIOPS.
- Collection Method
- Electron microprobe analysis, isotopic dating (U-Pb), and compositional mapping.
- Time Range
- Geologic events from Early Archean (~3800 Ma) to late events at ~520 Ma, with analyzed ages from 2400-2500 Ma to ~800 Ma.
- Freshness
- null
- Geography
- Antarctica, specifically the Napier Complex and locations like Khmara Bay's 'Zircon Point'.