Short-wave infrared (SWIR) reflectance spectrometric characterisation of clays from geothermal systems of the Taupō Volcanic Zone, New Zealand

Short-wave infrared (SWIR) reflectance spectrometric characterisation of clays from geothermal... •Short-wave infrared (SWIR) reflectance spectrometric characterisation of clays from geothermal systems of the Taupō Volcanic Zone.•Spectral characterisation/distinction of smectite, mixed-layered illite-smectite and illite by calibration against clay separate X-ray diffraction.•Recognition volcanic glass present in weakly altered rocks has a spectral signature.•Smectite, illite-smectite and illite useful to infer temperature and the thermal structure of the geothermal systems when these clays formed.•SWIR is a rapid, non-destructive mineral identification technique that can be done during drilling and can be used to identify other key geothermal minerals e.g. epidote, kaolinite, alunite, pyrophyllite, and others. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geothermics Elsevier

Short-wave infrared (SWIR) reflectance spectrometric characterisation of clays from geothermal systems of the Taupō Volcanic Zone, New Zealand

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0375-6505
eISSN
1879-3576
D.O.I.
10.1016/j.geothermics.2018.01.006
Publisher site
See Article on Publisher Site

Abstract

•Short-wave infrared (SWIR) reflectance spectrometric characterisation of clays from geothermal systems of the Taupō Volcanic Zone.•Spectral characterisation/distinction of smectite, mixed-layered illite-smectite and illite by calibration against clay separate X-ray diffraction.•Recognition volcanic glass present in weakly altered rocks has a spectral signature.•Smectite, illite-smectite and illite useful to infer temperature and the thermal structure of the geothermal systems when these clays formed.•SWIR is a rapid, non-destructive mineral identification technique that can be done during drilling and can be used to identify other key geothermal minerals e.g. epidote, kaolinite, alunite, pyrophyllite, and others.

Journal

GeothermicsElsevier

Published: May 1, 2018

References

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