Supplementary data for "Age of shergottite magmatism constrained by in situ U–Pb dating of merrillite"
收藏资源简介:
Numerical data underlying every figure and table of the paper "Age of shergottite magmatism constrained by in situ U–Pb dating of merrillite", together with the code from which those quantities were derived. The deposit provides, in comma-separated text format: electron-probe major- and minor-element analyses of merrillite, chlorapatite, and tuite in six shergottites (Northwest Africa 2975, 3171, 4480, 6963, 7042, and 7257); per-spot trace-element concentrations and CI-normalized rare-earth-element patterns; Ce and Eu anomalies; per-spot U–Pb isotopic ratios; Tera–Wasserburg lower-intercept ages for free and common-Pb-anchored regressions; the trace-element and Pb concentrations of a shock-vein traverse in Northwest Africa 7042; and phosphate modal abundances with individual grain measurements from whole-section energy-dispersive X-ray maps. The same content is supplied as a single spreadsheet for convenience; the CSV files are authoritative. The code comprises the extraction, regression, image-analysis, and figure-generation scripts. Optical and backscattered-electron images are not included. Trace-element and U–Pb data were collected by laser-ablation inductively-coupled-plasma mass spectrometry at the University of Houston; electron-probe microanalysis was performed at Queen's University; electron imaging and X-ray mapping were performed at the Zircon and Accessory Phase Laboratory, Western University.



