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. Low-temperature multi-thermochronometry, in which the(U-Th) / He and fission track methods are applied to minerals such as zirconand apatite, is a valuable approach for documenting rock cooling historiesand relating them to geological processes. Here we explore the behaviors oftwo of the most commonly applied low-temperature thermochronometers,(U-Th) / He in zircon (ZHe) and apatite (AHe), and directly compare them againstthe apatite fission track (AFT) thermochronometer for differentforward-modeled cooling scenarios. We consider the impacts that commonvariations in effective spherical radius (ESR) and effective uraniumconcentration (eU) may have on cooling ages and closure temperatures under arange of different cooling rates. This exercise highlights differentscenarios under which typical age relationships between thesethermochronometers (ZHe&gt;AFT&gt;AHe) are expected tocollapse or invert (either partially or fully). We anticipate that these predictionsand the associated software we provide will be a useful tool for teaching,planning low-temperature multi-thermochronometry studies, and for continuedexploration of the relative behaviors of these thermochronometers intemperature–time space through forward models.

Short communication: Modeling competing effects of cooling rate, grain size, and radiation damage in low-temperature thermochronometers