LA-ICP-MS protocols for U-Pb geochronology and trace element analysis of zircons: Optimized implementation at the PetroChron laboratory

This article presents a standardized analytical protocol for zircon characterization using a 193 nm ArF excimer laser (Teledyne Photon Machines IRIDIA) coupled to a single quadrupole ICP-MS (Thermo Scientific iCAP RQ). The method optimizes two primary workflows: high-resolution U-Pb geochronology and the simultaneous acquisition of U-Pb isotopic ratios with trace element (TE) concentrations. By systematically calibrating operational parameters-including carrier gas flow, repetition rates, and laser fluence-this approach maximizes analytical sensitivity while minimizing sample consumption, providing a robust framework for investigating detrital, igneous, and metamorphic zircons.•Optimized Workflows: Establishes precise parameters for both standalone U-Pb dating and integrated U-Pb/Trace Element analysis to ensure high spatial resolution and analytical throughput.•Performance Metrics: Demonstrates U-Pb age accuracy within 5% (precision <3%) and trace element accuracy better than 10% for most analytes based on extensive data acquisition.•Petrogenetic Application: Delivers a reliable, integrated framework for complex geological characterization, maintaining high-standard precision across diverse zircon populations.