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DeLong archipelago rock analysis:QEMSCAN compared to traditional methods
Andreas Sjöqvist (BSc student)

QEMSCAN false color image of a volcanoclastic rock, Jeanetta Island.

This project compares traditional methods of optical analysis with Quantitative Estimation of Mineralogy using Scanning Electron Microscopy (QEMSCAN).  Traditional methods include for example petrography, point counting and optical grain-shape analysis. QEMSCAN allows fast, automated analyses and provides much more information such as porosity, composition, mapping, etc.  QEMSCAN is also non-destructive. Clearly QEMSCAN analyses would be beneficial if the data compare well.