U-Pb Ages, Neodymium Isotope Ratios, and Trace Element Concentrations by Laser-Ablation Split Stream (LASS) Analysis of Igneous Titanite and Apatite from Interior and Southcentral Alaska

This dataset contains U-Pb isotopic data and ages plus trace element concentrations from titanite and apatite in igneous rocks collected for USGS projects in the Alaska Range, Yukon Tanana uplands of eastern Alaska, and a study of ophiolites in Alaska. A subset of analyses also includes simultaneous measurements of Sm-Nd isotope ratios. For this subset, split-stream configuration analyzed U-Pb isotope ratios and trace element concentrations by quadrupole inductively coupled plasma mass spectrometry (Q-ICPMS), and Sm-Nd isotope ratios by multi collector inductively coupled plasma mass spectrometry (MC-ICP-MS). For other samples, where grain sizes were small (