LA-MC-ICPMS and SHRIMP U-Pb dating of complex zircons from Quarternary tephras from the French Massif Central: Magma residence time and geochemical implications
Analyses of zircon grains from the Queureuilh Quaternary tephras (pumice) provide new information about their pre-eruptive history. U-Pb dating was performed in situ using two methods: SHRIMP and LA-MC-ICPMS equipped with a multi-ion counting system. Both methods provided reliable 207Pb/206Pb and 206Pb/238U ratios as well as U and Th abundances required for U-Pb Concordia intercept age determination, after initial 230Th disequilibrium correction. The new LA-MC-ICPMS method was validated by...[Show more]
|Collections||ANU Research Publications|
|Source:||Geochimica et Cosmochimica Acta|
|01_Cocherie_LA-MC-ICPMS_and_SHRIMP_U-Pb_2009.pdf||336.46 kB||Adobe PDF||Request a copy|
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.