La-icpms vs. empa for monazite dating

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Laser Ablation Inductively Coupled Plasma Mass Spectrometry LA-ICP-MS is widely used as a powerful micro analytical technique for solid sample analysis in a variety of scientific fields including geological, biological, archaeometrical, environmental, nuclear and metallurgical sciences. Trace-element concentrations in multiphase-solid MS inclusions see Ferrando et al. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
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Monazite geochronology

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(PDF) U-Pb and Th-Pb dating of apatite by LA-ICPMS | David Chew - sria.info

Narryer and Jack Hills meta-sedimentary rocks in the Narryer Gneiss Complex of the Yilgarn Craton, Western Australia are of particular importance because they yield Hadean detrital zircons. To better understand the tectonothermal history and provenance of these ancient sediments, we have integrated backscattered scanning electron images, in situ U—Pb isotopic and geochemical data for monazites from the meta-sediments. The data indicate multiple periods of metamorphic monazite growth in the Mt. These results set a new minimum age of 3. Narryer sediments, previously constrained between 3. Despite the significant metamorphic monazite growth, a relatively high proportion of detrital monazite survives in a Fe- and Mn-rich sample. This is likely because the high Fe and Mn bulk composition resulted in the efficient shielding of early formed monazite by garnet.
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Electron probe micro-analyzer (EPMA)

Metrics details. In consequence the monazite is interpreted to date a slightly pressure-dominated Variscan amphibolite-facies evolution. The Ordovician—Silurian-age monazites can be assigned to a pre-Variscan high-temperature event recorded by the homogenised garnets.
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