Field remote Stokes/anti‐Stokes Raman characterization of sulfur in hydrothermal vents. (20th April 2018) - Guimbretière, G.
Abstract: To study the dynamics of active volcanic environments, minerals involved in fresh lava flows are a nice probe and Raman spectroscopy is an excellent tool for their characterization. Because of the highly hostile environment linked to volcanic activity, studying lava cooling and weathering needs remote setups and specific procedures dedicated to medium‐high temperature targets. In this paper, we present the remote Raman characterization of sulfur produce by the fumarolic activity at Solfatara crater (Phlegraean Fields, Italy). Two medium temperature sites (280–380 K) were probed with two different Raman setups. For both, β‐sulfur is the prominent type in the entire temperature range and the absolute local temperature of the sulfur was remotely estimated by mean of a Stokes/anti‐Stokes procedure with ±10 K uncertainty. These results represent a good starting point for the development of new setups and protocols aimed to an increase of both measurement distance and temperature range. Abstract : In 2015, in Solfatara (Naples, Italia), two different portable setups were implemented for remote field estimation of hydrothermal sulfur temperature by mean of the Stokes/anti‐Stokes Raman ratio. The efficiency of the procedure was compared with micro‐Raman laboratory measurements in an optical furnace and temperature accuracy estimated to be (±10 K).