European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 35, issue 6
Articles | Volume 35, issue 6
https://doi.org/10.5194/ejm-35-949-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-35-949-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 35, issue 6
Research article
 | 
13 Nov 2023
Research article |  | 13 Nov 2023

Near-infrared signature of hydrothermal opal: a case study of Icelandic silica sinters

Maxime Pineau, Boris Chauviré, and Benjamin Rondeau

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Short summary
We study Icelandic silica sinter samples formed in hot-spring environments to evaluate the effect of both temperature and microstructure on the spectral properties of hydrothermal opal. We show that spectral changes can be related to different parameters such as fluid temperatures, hydrodynamics, microbial activity, and silica micro-textures, which are specific to their environment of formation within hot-spring geothermal contexts.
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