Strontium, Nd, and Pb isotopic data for basalt samples from the Macquarie Ridge Complex. Samples were collected from Macquarie Island and via dredging during the 2008 TAN0803 voyage, with analysis performed at the University of Geneva. The dataset was published by the Australian Antarctic Data Centre in 2019.
Use Cases
- Classify basalt samples by mantle source using 87Sr/86Sr, 143Nd/144Nd, and Pb isotope ratios.
- Model petrogenetic processes by analyzing correlations between 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb ratios.
- Trace the geochemical signature of the Macquarie Ridge by comparing isotopic ratios from island and dredged samples.
- Assess analytical precision and data quality using documented external reproducibility metrics for each isotope system.
Strengths
- Includes high-precision isotopic measurements with documented long-term external reproducibility (e.g., 10 ppm for Sr and Nd).
- Documents detailed analytical protocols, including interference corrections for Kr, Rb, Sm, and Hg.
- Reports total procedural blanks for Pb (<500 pg) and Sr/Nd (<100 pg), confirming minimal contamination.
Limitations
- Sample size and number of rows are not specified, limiting statistical assessment.
- Geographic coverage is restricted to the Macquarie Ridge Complex.
- Temporal coverage of sample collection is limited to specific events in 2008 and 2017.
Provenance
- Source
- Australian Antarctic Data Centre (AU_AADC), with sample collection by R. Merle, K. Evans, and the National Institute of Water and Atmospheric Research, New Zealand.
- Collection Method
- Field collection from Macquarie Island and dredging during the TAN0803 voyage; isotopic analysis via Multi-Collector ICP–MS at the University of Geneva.
- Time Range
- Sample collection occurred in 2008 and 2017.
- Freshness
- Last updated in 2019.
- Geography
- Macquarie Ridge Complex, specifically Macquarie Island and surrounding submarine ridge.