Zircon 2D shape and geochemistry

This data set accompanies the G-Cubed manuscript titled "Does Zircon Shape Retain Petrogenetic Information?". It presents individual zircon 2D shape measurements coupled with individual grain U and Th contents (where applicable) and sample whole-rock geochemistry.

Methods
Zircon 2D shape measurements were obtained by measuring black and white (binary) images contructed by merging reflected and transmitted light photomicrographs of zircons, mounted in epoxy. Zircon images were obtained from the Geological Survey of Western Australia (GSWA). Zircon shapes were measured using AnalyZr (https://zenodo.org/record/7885059).

Whole-rock geochemistry was sourced from the state-wide geochemistry data set of the GSWA (https://www.dmp.wa.gov.au/GeoChem-Extract-Geochemistry-1559.aspx). If multiple analyses exist for a chemical species measured in a given sample, the analysis with the lowest detection limit was used.

Zircon U and Th content was sourced from the GSWA's 2019 Geochronology Compilation https://dmpbookshop.eruditetechnologies.com.au/product/compilation-of-geochronology-information-2019.do). Zircon grains documented as having xenocrystic components, or being non-igneous (e.g., metamorphic, discordant, or subject to secondary processes) were excluded from the data. When a grain had multiple analyses interpreted to represent igneous crystallisation age, the analysis with the smallest analytical uncertainty was selected to represent the grain. A threshold of 1.5 Ga was used to select between 238U/206Pb (younger) or 207Pb/206Pb (older) isotope ratios for age determination.

The description, tectonic unit, age (Ma), age uncertainty (Ma), reference, lat, and long columns are drawn from the GSWA 2019 Geochronology Compilation spatial data set ( https://dmpbookshop.eruditetechnologies.com.au/product/compilation-of-geochronology-information-2019.do). The xenocryst component (%) reflects the xenocrysts to primary igneous zircon  for each sample, as documented in the GSWA 2019 Geochronology Compilation data sets ( https://dmpbookshop.eruditetechnologies.com.au/product/compilation-of-geochronology-information-2019.do) Discordant analyses were excluded from the xenocryst component (%) calculation.