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Table of Electron Probe Microanalyses of Vermiculite Samples


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Swayze, G.A., Lowers, H.A., Benzel, W.M., Clark, R.N., Driscoll, R.L., Perlman, Z.S., Hoefen, T.M., and Dyar, D.M., 2018, Spectroscopy of Expanded Vermiculite Products and Insulation: U.S. Geological Survey data release,


This dataset contains results from electron microprobe analyses for expanded and unexpanded vermiculite samples. These data are provide for samples of vermiculite ore, expanded vermiculite insulation, horticultural products, aggregate, and packing materials derived from mines near Enoree, South Carolina; Libby, Montana; Louisa, Virginia; Palabora, South Africa; Jiangsu, China; and Llano, Texas. An ASCII text file of results is provided in comma-separated by value (csv) format. The file has the name “vermiculite_probe_microanalyses_data.csv”.


Point of Contact :
Gregg Swayze
Originator :
Swayze, Gregg A.
Metadata Contact :
Swayze, Gregg A.
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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vermiculite_probe_microanalyses_data.csv 610.69 KB text/csv
Vermiculites_probe_microanalyses_data_dictionary.csv 2.83 KB text/csv


Data were obtained to develop an in situ spectral technique to identify the provenance (e.g., source) for use by inspectors and laboratories for identifying potentially asbestos-bearing vermiculite insulation in buildings and homes.

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