Webinar
High precision 142Nd isotope measurements using a Nu TIMS
Watch this webinar on demand to learn about Nu TIMS and more specifically how it can be used to achieve high precision analysis with our guest Claudine Israel from Institut de Physique du Globe de Paris.
· Daniel Roberts, Nu TIMS product manager (Nu Instruments):
Short presentation of Nu TIMS, its design and unique features
· Claudine Israel, Ingénieur de recherche (Institut de Physique du Globe de Paris)
The 146Sm-142Nd isotopic system (T1/2=103 Ma) is a powerful tool in geology for tracing early Earth’s continents formation and evolution during the first 500 Ma of Earth’s history. Hadean material is very rare at the surface of the Earth but some might still be preserved in the mantle and be sampled by recent volcanism. However, the expected range of 142Nd/144Nd variations in modern volcanic rocks is very small. To detect minute anomalies requires measurements with a routine precision better than 5 ppm (2sd).
In this webinar, Claudine will describe the method she uses with their Nu TIMS to perform a 5-line multi-dynamic analyses of Nd isotopes using the flexibility of its zoom optic system and the 16-fixed Faraday detectors fitted with 1011 Ω amplifier resistors [1]. Her results demonstrate that a precision better than 4 ppm can be routinely obtained on a Nu TIMS. This opens the possibility to trace very small variations in 142Nd/144Nd and detect minor traces of Hadean material in the present-day Earth mantle
[1] Luu et al. (Chemical Geology, 2022)
Nu TIMS Thermal Ionisation Mass Spectrometry
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