Further Characterization of the RW-1 Monazite: A New Working Reference Material for Oxygen and Neodymium Isotopic Microanalysis
Autor: | Qiu-Li Li, Qian Mao, Xiao-Xiao Ling, Chaofeng Li, Yue-Heng Yang, You-Lian Li, Xian-Hua Li, Benita Putlitz, Li-Guang Wu |
---|---|
Rok vydání: | 2019 |
Předmět: |
lcsh:Mineralogy
lcsh:QE351-399.2 Materials science 010504 meteorology & atmospheric sciences Analytical chemistry standard chemistry.chemical_element Geology Microbeam Electron microprobe Thermal ionization mass spectrometry 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology Mass spectrometry 01 natural sciences Neodymium Microanalysis Secondary ion mass spectrometry o isotopes chemistry rw-1 Monazite monazite nd isotopes 0105 earth and related environmental sciences |
Zdroj: | Minerals, Vol 9, Iss 10, p 583 (2019) Minerals Volume 9 Issue 10 |
ISSN: | 2075-163X |
Popis: | The oxygen (O) and neodymium (Nd) isotopic composition of monazite provides an ideal tracer of metamorphism and hydrothermal activity. Calibration of the matrix effect and monitoring of the external precision of monazite O&ndash Nd isotopes with microbeam techniques, such as secondary ion mass spectrometry (SIMS) and laser ablation-multicollector-inductively coupled plasma-mass spectrometry (LA-MC-ICPMS), require well-characterized natural monazite standards for precise microbeam measurements. However, the limited number of standards available is impeding the application of monazite O&ndash Nd isotopes. Here, we report on the RW-1 monazite as a potential new working reference material for microbeam analysis of O&ndash Nd isotopes. Microbeam measurements by electron probe microanalysis (EPMA), SIMS, and LA-MC-ICPMS at 10&ndash 24 µ m scales have confirmed that it is homogeneous in both elemental and O&ndash Nd isotopic compositions. SIMS measurements yield &delta 18O values consistent, within errors, with those obtained by laser fluorination techniques. Precise analyses of Nd isotope by thermal ionization mass spectrometry (TIMS) are consistent with mean results of LA-MC-ICPMS analyses. We recommend &delta 18O = 6.30&permil ± 0.16&permil (2SD) and 143Nd/144Nd = 0.512282 ± 0.000011 (2SD) as being the reference values for the RW-1 monazite. |
Databáze: | OpenAIRE |
Externí odkaz: | |
Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |