Magnesium Isotopic Compositions of International Geological Reference Materials
Magnesium Isotopic Compositions of International Geological Reference Materials
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DOI：
10.1111/j.1751-908x.2014.00326.x
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发表时间：
2015-09
影响因子：
3.8
通讯作者：
F. Teng;Wangye Li;S. Ke;Wei Yang;Sheng‐Ao Liu;F. Sedaghatpour;Shui‐Jiong Wang;Kang-Jun Huang-
中科院分区：
文献类型：
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作者：
F. Teng;Wangye Li;S. Ke;Wei Yang;Sheng‐Ao Liu;F. Sedaghatpour;Shui‐Jiong Wang;Kang-Jun Huang-
报道了24种国际地质参考物质的镁同位素组成，包括火成岩、变质岩和沉积岩，以及云母和蛇纹石矿物。根据对橄榄石和海水样品4年的分析，Mg同位素测定的长期重复性为δ26Mg≤0.07‰（2s）， δ25Mg≤0.05‰（2s）。通过分析合成标准物质来检验准确性，直至引用的长期重现性。该综合数据集，加上同一实验室生产的海水数据，可作为质量保证和实验室间高精度Mg同位素数据比较的参考。
Magnesium isotopic compositions are reported for twenty‐four international geological reference materials including igneous, metamorphic and sedimentary rocks, as well as phlogopite and serpentine minerals. The long‐term reproducibility of Mg isotopic determination, based on 4‐year analyses of olivine and seawater samples, was ≤ 0.07‰ (2s) for δ26Mg and ≤ 0.05‰ (2s) for δ25Mg. Accuracy was tested by analysis of synthetic reference materials down to the quoted long‐term reproducibility. This comprehensive dataset, plus seawater data produced in the same laboratory, serves as a reference for quality assurance and inter‐laboratory comparison of high‐precision Mg isotopic data.