In situ U-Pb dating of xenotime by laser ablation (LA)-ICP-MS

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Nevertheless, the results of this study provide an example of the type of precision and accuracy that may be possible with this technique under ideal conditions. Earth and Planetary Science Letters, 349-350, 15-25. A flat surface of sample is needed to conduct an analysis.

Nevertheless, the results of this study provide an example of the type of precision and accuracy that may be possible with this technique under ideal conditions. Data Type Observation Interpretation Limitation The content of serves as a crystallization thermometer given knowledge of the melt a SiO2 and a TiO2. Nature, 269 5623 , 25-28. The geochemical and Hf isotopic signatures suggest that the Neoproterozoic Xiaoxigong granite was generated by partial melting of crustal rocks during the the post-orogenic period.

In situ U-Pb dating of xenotime by laser ablation (LA)-ICP-MS - High value of 18  observed in Hadean Jack Hills zircons led to two different ideas about the source of Hadean zircon.

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Scientists have constructed different models to explain the thermal history in early history including continental growth model, Icelandic rhyolites, intermediate igneous rocks, mafic igneous rocks, sagduction, , heat pipe tectonics, terrestrial and multi-stage scenarios. The matrix-effect resulted in either under-correction or over-correction of fractionation, and thus led to inaccurate ages. The latter is the method employed in this study. Since the crystallisation of is unknown, researchers can only estimate the temperature by calculation. A gas blank was collected before each analysis with the plasma on but laser not firing. However, the zircon crystals there are older than the rocks that contain them. The probability of discovering at least a single over four billion-year-old zircon is very low. Geochimica Et Cosmochimica Acta, 74 12 , A237-A237. However, it's still an unknown how the early Earth was formed. Zircon geochemistry By analysing the content of zircon, some zircon show the presence of titanium, rare earth minerals, lithium, aluminium and carbon.

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