U pb dating of zircon by la icp ms donghae dating yoona
This technique is especially well suited to reconnaissance geochronologic and detrital zircon studies.
Chemical Abrasion Isotope-Dilution Thermal Ionization Mass Spectrometry (CA-ID-TIMS) is known as a high precision technique for resolving lead loss and improving the interpretation of U–Pb zircon age data.
The method employs the concurrent measurement of Th (U-Th) ages simultaneously.
All zircon separates are analysed by LA-ICP-MS before and after CA, and age data are compared with CA-ID-TIMS U dates that are considered as the most accurately obtainable age.
All CA-treated zircon crystals show up to 50% less data scatter compared to the non-CA treated zircon grains and thus reduction of the calculated uncertainties is apparent.
Contributions cover a global geographic scope, and address all ages (Precambrian to the Quaternary, including modern analogs).
LA-ICPMS zircon U-Pb dating has been greatly advanced and widely applied in the past decade because it is a cheap and fast technique.
The obtained wt average LA-ICP-MS U ages of the CA-treated zircon grains are up to 4–6% higher than those of the non-CA treated crystals, exceeding the analytical uncertainties of the LA-ICP-MS dating technique of 1–2%.