Publication
Names
  • P. Beck
  • O. Beyssac
  • B. Schmitt
  • A. J. Brown
  • C. Royer
  • L. Mandon
  • E. Boulard
  • N. Rividi
Title
Crystal chemistry of Fe-Mg carbonates retrieved through Raman and near-infrared remote sensing
Abstract
On Earth carbonate minerals are widely used as recorders of the geological environments in which they formed. Here we present a method designed to retrieve the crystal chemistry of Fe-Mg carbonate minerals using infrared or Raman remote sensing. We analyzed a suite of well-characterized Fe-Mg carbonate minerals for which Raman spectra were obtained in two different laboratories, and IR spectra were measured in reflectance and transmission from the visible range to 25-µm. We build calibration lines for the dependence of fundamental and harmonic vibrational modes position to the Mg# (defined as Mg#=100*Mg/(Mg+Fe+Ca+Mn)). These calibrations should enable retrieval of Mg# based on remote sensing observations with a typical accuracy of 10. We discuss the framework of applicability of these calibrations and apply them to a typical CRISM spectrum of carbonates from the Nilli Fossae region of Mars.
Keywords
spectroscopy, reflectance, transmission, Raman spectroscopy, Vis, NIR, MIR, FIR, KBr pellet, band position, band attribution, minerals, composition, carbonate, magnesite, siderite, MgCO3, FeCO3, Fe, Mg, Planetary Science, Mars, Asteroid
Content
band list data, spectral data, planetary sciences
Year
2024
Journal
Earth and Space Science
Document type
article
Publication state
submitted