Fig. 3
From: Enhanced U-Pb detrital zircon, Lu-Hf zircon, δ18O zircon, and Sm-Nd whole rock global databases
The trend toward using smaller mass spectrometer spot diameters over time for U-Pb dating of detrital zircon: (blue) LA-ICP-MS analyses for all labs, (green) LA-ICP-MS analyses conducted at the Arizona LaserChron Center, and (red) SHRIMP/SIMS analyses for all labs.
