New Reference Material of Dunite Rock, NGRI-UMR: Preparation and Evaluation |
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| Authors: | Pradip K Govil BL Narayana |
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| Institution: | Geochemistry Group, National Geophysical Research Institute, Hyderabad - 500 007, India. e-mail: |
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| Abstract: | A dunite reference material has been prepared as part of the reference materials programme at the National Geophysical Research Institute, Hyderabad, India. The scarcity of reference materials for undertaking the chemical analysis of ultramafic rocks for major and trace elements justified the preparation of such a rock reference material. A 300 kg sample of starting material was collected from an active quarry near the town of Salem in Tamil Nadu, southern India. The sample was homogenized and an invitation for round robin participation was published in Geostandards Newsletter (October 1995). A total of twenty seven international laboratories participated in the study, providing information on the total element concentration of major, minor, trace and rare earth elements. Following data compilation, outlier rejection, and statistical analysis, proposed and indicative total element concentrations are reported for twenty four elements. |
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| Keywords: | dunite NGRI-UMR reference material data compilation characterisation report |
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