Concept information
Preferred term
PETROGRAPHIC MICROSCOPES
Definition
- PETROGRAPHIC MICROSCOPES are microscopes used with The Geological Survey of Japan (GSJ) who has issued 31 rock reference samples for the analysis of major, minor and trace elements, isotopic compositions and isotopic ages. The purpose of this standard reference material project in Geological Survey of Japan is to improve and check the reliability of analytical data obtained from different methods and different laboratories. (en)
Broader concept
URI
https://gcmd.earthdata.nasa.gov/kms/concept/5b9da836-cd16-4dab-b1ff-be1588738ef8
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