U pb dating of zircon by la icp ms donghae dating yoona

Posted by / 28-May-2020 01:33

U pb dating of zircon by la icp ms

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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.

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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%.

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