A new method for U-Pb geochronology of cassiterite by ID-TIMS applied to the Mole Granite polymetallic system, eastern Australia
We present a new method for precisely determining the U-Pb isotopic composition of cassiterite by isotope dilution-thermal ionisation mass spectrometry (ID-TIMS). Complete sample dissolution and spike-sample equilibration is accomplished in a pressure vessel with HBr. Isolation of small quantities of U and Pb from the tin-rich matrix is based on a novel TRU-spec column separation with total procedural blanks of < 9 pg of Pb and < 0.09 pg of U. The method was applied to measure the U-Pb...[Show more]
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