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Three Cobalt-Rich Seamount Crust Reference Materials: GSMC-1 to 3
Authors:Xiaohong Wang  Yushu Gao  Yimin Wang  SI Andreev
Institution:National Research Centre of Geoanalysis, 26 Baiwanzhuang Street, Beijing 100037, China;All-Russian Research Institute for Geology and Mineral Resources of the World Ocean (VNIIOkeangeologiya), St. Petersburg 191021, Russia
Abstract:A research project involving the preparation of three Co-rich crust reference materials (GSMC-1 to 3) has been preliminarily completed. The samples were collected from the eastern and central Pacific seamount zones and their main chemical composition is MnO2. After the raw materials were dried in ambient air and at low temperature (60-100 C), they were ground in a ball mill to form a well-mixed powder. The proportion of particle size fractions of < 74 μm and < 3 μm was over 98% and 50% respectively. The homogeneity of the materials was tested using wavelength dispersive X-ray fluorescence spectrometry (WD-XRF). The relative standard deviation (% RSD) of the measurements for all the selected elements in forty sub-samples randomly taken from the bottles was less than 0.4%. Sixteen laboratories from Germany, Russia, France, Australia and China participated in the collaborative analysis programme. Fifty seven elements or constituents were analysed, and among those, forty six elements were certified in each sample. The sum of contents of the major and minor elements or components was 99.5% for GSMC-1, 99.6% for GSMC-2 and 99.2% for GSMC-3.
Keywords:Co-rich crust  reference materials  Pacific seamount  characterisation programme  GSMC-1 to 3
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