Increased precision in isotope-dilution thermal ionization mass spectrometry (ID-TIMS) U{\textendash}Pb geochronology has revealed age complexities in zircon populations that require new tools for understanding how the growth of zircon is related to geologic processes. U and Pb are routinely separated from other elements in dated minerals by ion exchange separation prior to TIMS isotope measurement. We develop a method in which trace elements in the exact same volume of zircon are redissolved and analyzed using solution nebulization inductively coupled plasma sector-field mass spectrometry with matrix-matched external liquid calibration. Using \<0.5~ml solution, resulting concentrations are between \<1~ppt for elements such as Ti, Nb and Ta and tens of ppb for Zr. By analyzing a series of standard solutions, zircons and procedural blanks, we show that accurate measurements are performed on Zr, Hf, Y, Sc, and the HREE while low-concentration elements can be measured accurately to \<5~ppt. We performed combined U{\textendash}Pb ID-TIMS geochronology with trace element analysis (here called U{\textendash}Pb TIMS-TEA) on zircons from eight volcanic rocks comprising several volcanic systems and one metamorphic sample. Similar to previous~in situ~trace element analyses, zircon geochemistry is distinct between different samples and records petrogenetic processes such as fractional crystallization, assimilation and/or magma mixing. Unique from~in situ~analysis, U{\textendash}Pb TIMS-TEA can trace geochemical evolution in accessory minerals with adequate age precision to resolve magmatic processes in rocks at least 200 million years old. This provides a means to identify auto-, ante- and xenocrystic zircon and lead to more robust age interpretations in ID-TIMS U{\textendash}Pb geochronology. One suite of Cretaceous andesitic zircons shows correlations in geochemistry and absolute time that record evolution of a magmatic system over \~{}250~ka prior to eruption. Future work will combine U{\textendash}Pb TIMS-TEA with solution isotopic analysis of Nd, Sr and Hf and will be applied to a host of datable minerals such as monazite, sphene, apatite, rutile, xenotime, and baddeleyite. These combined tools will provide access to an improved understanding of a wide range of igneous and metamorphic processes as a function of time.
}, year = {2010}, journal = {Geochimica et Cosmochimica Acta}, volume = {74}, pages = {7144-7159}, month = {12/2010}, url = {https://doi.org/10.1016/j.gca.2010.09.016}, doi = {10.1016/j.gca.2010.09.016}, language = {eng}, }