Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Raman modes of carbonate minerals as pressure and temperature gauges up to 6 GPa and 500 degrees C

Stefan Farsang, Sebastien Facq and Simon A. T. Redfern
Raman modes of carbonate minerals as pressure and temperature gauges up to 6 GPa and 500 degrees C
American Mineralogist (December 2018) 103 (12): 1988-1998

Abstract

Diamond-anvil cell (DAC) experiments focusing on the solubility of carbonates and aqueous carbon speciation at subduction zones require pressure monitoring with sensitive, chemically inert sensors. Commonly used pressure indicators are either too insensitive or prone to contaminate pressure-transmitting media due to their increased solubility at high pressure and/or temperature (P-T). Here, the P- and T-induced frequency shifts of the Raman vibrational modes of natural crystalline carbonate minerals aragonite, calcite, dolomite, magnesite, rhodochrosite, and siderite have been calibrated for application as Raman spectroscopic P and T sensors in DACs up to 500 degrees C and 6 GPa. The shifts of all modes are quasi-constant over the observed P and T ranges and are generally less prominent for internal modes than for external modes. Our method provides a sensitive and robust alternative to traditional pressure calibrants, and has three principal advantages: (1) higher sensitivity (for particular Raman vibrational modes), (2) monitoring P-T-induced shifts of several modes allows even more accurate P-T determination, and (3) no contamination of pressure-transmitting media by foreign materials can occur. Additionally, the isobaric and isothermal equivalent of the Gruneisen parameter and the anharmonic parameter for each of the traced modes have been determined.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 103
Serial Issue: 12
Title: Raman modes of carbonate minerals as pressure and temperature gauges up to 6 GPa and 500 degrees C
Affiliation: University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
Pages: 1988-1998
Published: 201812
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 73
Accession Number: 2019-006961
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
Secondary Affiliation: Shanghai Center for High Pressure Science and Technology Advanced Research, CHN, China
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201906
Close Modal

or Create an Account

Close Modal
Close Modal