Authors: Dubessy, Jean; Lhomme, Thérèse; Boiron, Marie-Christine; Rull, Fernando

Source: Applied Spectroscopy, Volume 56, Issue 1, Pages 9A-36A and 1-138 (January 2002) , pp. 99-106(8)

Publisher: Society for Applied Spectroscopy

Abstract:

A new analytical method, based on the Raman spectroscopy of the ν(OH) stretching vibration of water, has been developed for the determination of the concentration of chloride in aqueous solutions with the goal of reconstructing the bulk ion content of fluid inclusions that are relics of paleo-fluid circulation in rocks. The method involves calibrating the area of one band of the spectrum difference between pure water and solutions of appropriate composition with respect to the chloride concentration. Calibration curves were constructed for the major geological chemical salts LiCl, NaCl, KCl, CaCl₂, and MgCl₂, and NaCl-CaCl₂ systems. The application to fluid inclusions has been confirmed using synthetic fluid inclusions. For cubic minerals such as fluorite, the calibration curve for the NaCl system correctly estimates the chlorinity. For birefringent minerals, such as quartz, the Raman spectrum of the aqueous solution depends on the orientation of the host crystal. The crystal must be oriented in such a way that one axis of the ellipse of the indicatrix projects parallel to the spectrometer slit. This method complements micro-thermometric data and allows the determination of chlorinity when ice-melting temperature cannot be used.

Keywords: CHLORIDE AQUEOUS SOLUTIONS; FLUID INCLUSIONS; RAMAN SPECTROSCOPY; POLARIZATION EFFECT

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702021954278

Publication date: 2002-01-01

More about this publication?

• The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge.
  
  Previously published as Bulletin (Society for Applied Spectroscopy)
• Editorial Board
• Information for Authors
• Submit a Paper
• Subscribe to this Title
• Membership Information
• Request copyrighted SAS materials
• Spectroscopic Nomenclature
• Focus Compendium
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Analytical Chemistry
• By this author: Dubessy, Jean ;  Lhomme, Thérèse ;  Boiron, Marie-Christine ;  Rull, Fernando

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers