High‐precision Pb‐Sr‐Nd‐Hf isotopic characterization of USGS BHVO‐1 and BHVO‐2 reference materials
High‐precision Pb‐Sr‐Nd‐Hf isotopic characterization of USGS BHVO‐1 and BHVO‐2 reference materials
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DOI：
10.1029/2004gc000852
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发表时间：
2005-02
期刊：
影响因子：
3.7
通讯作者：
D. Weis;B. Kieffer;C. Maerschalk;W. Pretorius;J. Barling
中科院分区：
文献类型：
--
作者：
D. Weis;B. Kieffer;C. Maerschalk;W. Pretorius;J. Barling
多接收器电感耦合等离子体质谱（MC‐ICP‐MS）的最新发展和该技术的日益广泛使用，创造了对表征良好的岩石标准品的需求，特别是对于无法应用内部分馏校正的同位素系统。本文介绍了对美国地质调查局（USGS）参考材料BHVO-1和BHVO-2（夏威夷玄武岩）的仔细浸出实验，并记录了加工过程中岩石粉末污染的证据。这种污染解释了BHVO-1和BHVO-2的Pb同位素比值的差异，以及它们在Pb同位素组成和某些微量元素含量方面缺乏均匀性。
The recent development of multiple‐collector inductively coupled plasma mass spectrometry (MC‐ICP‐MS) and increasing use of the technique have created the need for well‐characterized rock standards, especially for isotopic systems where no internal fractionation correction can be applied. This paper presents a careful leaching experiment on the U.S. Geological Survey (USGS) reference materials BHVO‐1 and BHVO‐2 (Hawaiian basalts) and documents the evidence for contamination of the rock powders during processing. This contamination accounts for the difference in Pb isotopic ratios of BHVO‐1 and BHVO‐2 as well as for their lack of homogeneity both in Pb isotopic compositions and in some trace element contents.