Zircon is a key mineral in geochronology because of its chemical inertness and tendency to incorporate radioactive trace elements such as U and Th. Quantifying the partitioning of the actinide elements is critical to constrain initial non-secular equilibrium amounts of 230Th in zircon. An excess or deficit of 206Pb will be produced from such an initial excess/deficit of 230Th from the secular equilibrium condition, which influences the calculated 238U - 206Pb age (Schärer, 1984; Mattinson, 1973). However, there is no standard way to calculate DTh/U values when applying age corrections to young igneous systems making uncertainties hard to estimate. Zircon was synthesized in multiple series of one-atmosphere experiments using basaltic andesite, andesite, and rhyolite starting materials, doped with Zr, U, and Th. Different experimental temperatures and oxygen fugacity conditions (ΔQFM-4 to ΔQFM+4) were explored to examine non-equilibrium U and Th partitioning. U and Th concentrations in zircon crystals and coexisting melt were analyzed through EPMA, SIMS, and ICP-MS. In our study, we specifically quantify the effects of sector zoning, fractional crystallization, oxygen fugacity, melt composition, and temperature on actinide element partitioning. By combing experimental and natural zircon data, we find temperature has the primary control on the partitioning of U and Th in the zircon and there is a negative relationship between D_actinides^(zir/rock) and zircon crystallization temperatures. The calibrated equation can be directly applied to the 230Th correction for an improvement in the accuracy of age-corrected determinations once we know the zircon crystallization temperatures and whole rock silica contents.