40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration
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Academia Brasileira de Ciências
2002
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| author | Wilson Teixeira |
| author_facet | Wilson Teixeira |
| contents | 40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration Wilson Teixeira Paulo M. Vasconcelos Artur T. Onoe Koji Kawashita Adalberto J. Soares Multidisciplinaria (Ciencias Naturales y Exactas) 40Ar 39Ar method irradiation calibration geochronology Laser heating 40Ar/39Ar geochronology provides high analytical precision and accuracy, µm-scale spatialresolution, and statistically significant data sets for the study of geological and planetary processes. Anewly commissioned 40Ar/39Ar laboratory at CPGeo/USP, São Paulo, Brazil, equips the Brazilian scientificcommunity with a new powerful tool applicable to the study of geological and cosmochemical processes.Detailed information about laboratory layout, environmental conditions, and instrumentation provides thenecessary parameters for the evaluation of the CPGeo/USP 40Ar/39Ar suitability to a diverse range of applications.Details about analytical procedures, including mineral separation, irradiation at the IPEN/CNENreactor at USP, and mass spectrometric analysis enable potential researchers to design the necessary samplingand sample preparation program suitable to the objectives of their study.Finally, the results of calibration tests using Ca and K salts and glasses, international mineral standards,and in-house mineral standards show that the accuracy and precision obtained at the 40Ar/39Ar laboratoryat CPGeo/USP are comparable to results obtained in the most respected laboratories internationally. Theextensive calibration and standardization procedures undertaken ensure that the results of analytical studiescarried out in our laboratories will gain immediate international credibility, enabling Brazilian students andscientists to conduct forefront research in earth and planetary sciences. 2002 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32774208 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.74 |
| format | Artículo científico |
| id | redalyc_32774208 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | 40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration Wilson Teixeira Multidisciplinaria (Ciencias Naturales y Exactas) 40Ar 39Ar method irradiation calibration geochronology 40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration Wilson Teixeira Paulo M. Vasconcelos Artur T. Onoe Koji Kawashita Adalberto J. Soares Multidisciplinaria (Ciencias Naturales y Exactas) 40Ar 39Ar method irradiation calibration geochronology Laser heating 40Ar/39Ar geochronology provides high analytical precision and accuracy, µm-scale spatialresolution, and statistically significant data sets for the study of geological and planetary processes. Anewly commissioned 40Ar/39Ar laboratory at CPGeo/USP, São Paulo, Brazil, equips the Brazilian scientificcommunity with a new powerful tool applicable to the study of geological and cosmochemical processes.Detailed information about laboratory layout, environmental conditions, and instrumentation provides thenecessary parameters for the evaluation of the CPGeo/USP 40Ar/39Ar suitability to a diverse range of applications.Details about analytical procedures, including mineral separation, irradiation at the IPEN/CNENreactor at USP, and mass spectrometric analysis enable potential researchers to design the necessary samplingand sample preparation program suitable to the objectives of their study.Finally, the results of calibration tests using Ca and K salts and glasses, international mineral standards,and in-house mineral standards show that the accuracy and precision obtained at the 40Ar/39Ar laboratoryat CPGeo/USP are comparable to results obtained in the most respected laboratories internationally. Theextensive calibration and standardization procedures undertaken ensure that the results of analytical studiescarried out in our laboratories will gain immediate international credibility, enabling Brazilian students andscientists to conduct forefront research in earth and planetary sciences. 2002 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32774208 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.74 |
| title | 40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) 40Ar 39Ar method irradiation calibration geochronology |
| url | https://www.redalyc.org/articulo.oa?id=32774208 |