title: Brillouin spectroscopy of fluid inclusions proposed as a paleothermometer for subsurface rocks.
abstract: As widespread, continuous instrumental Earth surface air temperature records are available only for the last hundred fifty years, indirect reconstructions of past temperatures are obtained by analyzing "proxies". Fluid inclusions (FIs) present in virtually all rock minerals including exogenous rocks are routinely used to constrain formation temperature of crystals. The method relies on the presence of a vapour bubble in the FI. However, measurements are sometimes biased by surface tension effects. They are even impossible when the bubble is absent (monophasic FI) for kinetic or thermodynamic reasons. These limitations are common for surface or subsurface rocks. Here we use FIs in hydrothermal or geodic quartz crystals to demonstrate the potential of Brillouin spectroscopy in determining the formation temperature of monophasic FIs without the need for a bubble. Hence, this novel method offers a promising way to overcome the above limitations.
authors: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon and Institut Universitaire de France, 69622 Villeurbanne Cedex, France.
authors: Mouna
authors: M
authors: El Mekki-Azouzi
authors: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon and Institut Universitaire de France, 69622 Villeurbanne Cedex, France.
authors: Chandra Shekhar Pati
authors: CS
authors: Tripathi
authors: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon and Institut Universitaire de France, 69622 Villeurbanne Cedex, France.
authors: Gaël
authors: G
authors: Pallares
authors: UMR CNRS 5276 Laboratoire de Géologie de Lyon, Université Lyon1/ENS Lyon, Campus de la Doua, 2 rue Raphaël Dubois, 69622 Villeurbanne Cedex, France.
authors: Véronique
authors: V
authors: Gardien
authors: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon and Institut Universitaire de France, 69622 Villeurbanne Cedex, France.
authors: Frédéric
authors: F
authors: Caupin