Comprehensive Chemical and Isotopic Analyses of Basalt and Sediment Reference MaterialsGeostandards and Geoanalytical Research - Tập 35 Số 1 - Trang 125-143 - 2011
Catherine Chauvel, Sarah Bureau, Christèle Poggi
Geochemical studies of geological samples require the precise determination of their major and trace element contents and, when measured, of their isotopic compositions. It is now commonly accepted that the accuracy and precision of geochemical analyses are best estimated by the concomitant analysis of international reference materials run as unknown samples. Although the composition of a ...... hiện toàn bộ
Determination of Reference Values for NIST SRM 610–617 Glasses Following ISO GuidelinesGeostandards and Geoanalytical Research - Tập 35 Số 4 - Trang 397-429 - 2011
Klaus Peter Jochum, Ulrike Weis, Brigitte Stoll, Giovanna Guidoboni, Qichao Yang, Ingrid Raczek, Dorrit E. Jacob, Andreas Stracke, Karin Birbaum, Daniel A. Frick, Detlef Günther, Jacinta Enzweiler
We present new reference values for the NIST SRM 610–617 glasses following ISO guidelines and the International Association of Geoanalysts’ protocol. Uncertainties at the 95% confidence level (CL) have been determined for bulk‐ and micro‐analytical purposes. In contrast to former compilation procedures, this approach delivers data that consider present‐day requirements of data quality. New...... hiện toàn bộ
A Proposal for the Publication of Geochemical Data in the Scientific LiteratureGeostandards and Geoanalytical Research - Tập 36 Số 3 - Trang 225-230 - 2012
Philip J. Potts
A proposal is set out for the information and details that should accompany the publication of geochemical data in the research literature. This proposal is based on the principle that sufficient detail must be included both to allow independent replication of the results and for reviewers to confirm that data are fit‐for‐purpose in supporting the way in which they have been interpreted. I...... hiện toàn bộ
Zircon M257 ‐ a Homogeneous Natural Reference Material for the Ion Microprobe U‐Pb Analysis of ZirconGeostandards and Geoanalytical Research - Tập 32 Số 3 - Trang 247-265 - 2008
Lutz Nasdala, Wolfgang Hofmeister, Nicholas Norberg, J. Martinson, Fernando Corfú, Wolfgang Dörr, Sandra L. Kamo, Allen Kennedy, Andreas Kronz, Peter W. Reiners, Dirk Frei, Jan Košler, Yusheng Wan, Jens Götze, Tobias Häger, Alfred Kröner, John W. Valley
We introduce and propose zircon M257 as a future reference material for the determination of zircon U‐Pb ages by means of secondary ion mass spectrometry. This light brownish, flawless, cut gemstone specimen from Sri Lanka weighed 5.14 g (25.7 carats). Zircon M257 has TIMS‐determined, mean isotopic ratios (2s uncertainties) of 0.09100 ± 0.00003 for 206pb/238<...... hiện toàn bộ
Further Characterisation of the 91500 Zircon CrystalGeostandards and Geoanalytical Research - Tập 28 Số 1 - Trang 9-39 - 2004
Michael Wiedenbeck, John M. Hanchar, William H. Peck, Paul J. Sylvester, John W. Valley, Martin J. Whitehouse, Andreas Kronz, Y. Morishita, Lutz Nasdala, Jens Fiebig, I. A. Franchi, Jean‐Pierre Girard, R. C. Greenwood, R. W. Hinton, N. T. Kita, Paul R.D. Mason, M. D. Norman, M. Ogasawara, Philip M. Piccoli, Dieter Rhede, Hideto Satoh, B. Schulz-Dobrick, Øyvind Skår, Michael J. Spicuzza, Kentaro Terada, A. G. Tindle, S. Togashi, Torsten Vennemann, Xie Quan, Yong‐Fei Zheng
This paper reports the results from a second characterisation of the 91500 zircon, including data from electron probe microanalysis, laser ablation inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS), secondary ion mass spectrometry (SIMS) and laser fluorination analyses. The focus of this initiative was to establish the suitability of this large single zircon crystal for calibrating ...... hiện toàn bộ