Validation of digestion and element separation methods and a new data reduction program (IsotopeHf®) for Lu-Hf isotope dilution analysis by MC-ICP-MS
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2016
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| author | Reneé González-Guzmán |
| author_facet | Reneé González-Guzmán |
| contents | Validation of digestion and element separation methods and a new data reduction program (IsotopeHf®) for Lu-Hf isotope dilution analysis by MC-ICP-MS Reneé González-Guzmán Bodo Weber María D. Tazzo-Rangel Luigi Solari Ciencias de la Tierra Lu Hf MC ICP MS analysis The Lu-Hf isotope system is not only an important geochrono- meter but also a powerful tool for petrogenetic studies. To determine reliable analytical results of this system from rock and mineral samples, a protocol is established that includes appropriate sample digestion, a three-stage HREE-Hf ion-exchange separation procedure, a data acquisition protocol by MC-ICP-MS, and an R-based data reduction software package (IsotopeHf ® ) that transforms raw mass spectrome- try data into meaningful isotopic ratios, including all the necessary corrections for spiked samples. Our 176 Hf/ 177 Hf results of both mafic and felsic geochemical reference standards agree with those reported by other authors. However, results obtained using PicoTrace® pressure digestion system (DAS®) yield significantly higher 176 Lu/ 177 Hf for felsic rocks with high Hf content (> 15 ppm) compared to data obtained by Parr® bomb dissolution, indicating incomplete digestion of HFSE-rich phases like zircon under specific conditions of DAS® digestion. The high degree of Hf purity attained using our chemical procedure, MC- ICP-MS measurement protocol, and the IsotopeHf ® program yielded accurate data with reliable and reproducible Lu-Hf isotope ratios within typical analytical uncertainties. 2016 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57246489009 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.2 Vol.33 |
| format | Artículo científico |
| id | redalyc_57246489009 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Validation of digestion and element separation methods and a new data reduction program (IsotopeHf®) for Lu-Hf isotope dilution analysis by MC-ICP-MS Reneé González-Guzmán Ciencias de la Tierra Lu Hf MC ICP MS analysis Validation of digestion and element separation methods and a new data reduction program (IsotopeHf®) for Lu-Hf isotope dilution analysis by MC-ICP-MS Reneé González-Guzmán Bodo Weber María D. Tazzo-Rangel Luigi Solari Ciencias de la Tierra Lu Hf MC ICP MS analysis The Lu-Hf isotope system is not only an important geochrono- meter but also a powerful tool for petrogenetic studies. To determine reliable analytical results of this system from rock and mineral samples, a protocol is established that includes appropriate sample digestion, a three-stage HREE-Hf ion-exchange separation procedure, a data acquisition protocol by MC-ICP-MS, and an R-based data reduction software package (IsotopeHf ® ) that transforms raw mass spectrome- try data into meaningful isotopic ratios, including all the necessary corrections for spiked samples. Our 176 Hf/ 177 Hf results of both mafic and felsic geochemical reference standards agree with those reported by other authors. However, results obtained using PicoTrace® pressure digestion system (DAS®) yield significantly higher 176 Lu/ 177 Hf for felsic rocks with high Hf content (> 15 ppm) compared to data obtained by Parr® bomb dissolution, indicating incomplete digestion of HFSE-rich phases like zircon under specific conditions of DAS® digestion. The high degree of Hf purity attained using our chemical procedure, MC- ICP-MS measurement protocol, and the IsotopeHf ® program yielded accurate data with reliable and reproducible Lu-Hf isotope ratios within typical analytical uncertainties. 2016 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57246489009 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.2 Vol.33 |
| title | Validation of digestion and element separation methods and a new data reduction program (IsotopeHf®) for Lu-Hf isotope dilution analysis by MC-ICP-MS |
| topic | Ciencias de la Tierra Lu Hf MC ICP MS analysis |
| url | https://www.redalyc.org/articulo.oa?id=57246489009 |