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Application of micro-FTIR imaging in the Earth sciences
Author(s)
Language
English
Obiettivo Specifico
2.3. TTC - Laboratori di chimica e fisica delle rocce
Status
Published
JCR Journal
JCR Journal
Title of the book
Issue/vol(year)
6/397 (2010)
Pages (printed)
2039-2049
Issued date
2010
Abstract
In this paper we describe recent applications of
micro-infrared imaging in the Earth sciences. We address,
in particular, the use of Fourier-transform infrared (FTIR)
spectroscopy in characterizing the zoning and speciation of
H and C in a variety of geological materials, including
microporous minerals, nominally anhydrous volcanic minerals
(NAMs), and crystal inclusions. These investigations
show that use of the modern techniques of FTIR imaging
enables detection of the zoning of volatile species across
the studied samples, and possible configuration changes of
structurally-bound carbon molecular species (e.g., CO2 vs
CO3) during crystal growth. Such features, which are not
accessible with other micro-analytical techniques, may
provide information about the physicochemical properties
which act as constraints in the genesis of the samples, and
important information about the evolution of the geological
system. Tests performed with focal-plane-array detectors
(FPA) show that resolution close to the diffraction limit can
be achieved if the amounts of the target molecules in the
sample are substantially different. We also point out the
possibility of using FTIR imaging for investigations under
non-ambient conditions.
micro-infrared imaging in the Earth sciences. We address,
in particular, the use of Fourier-transform infrared (FTIR)
spectroscopy in characterizing the zoning and speciation of
H and C in a variety of geological materials, including
microporous minerals, nominally anhydrous volcanic minerals
(NAMs), and crystal inclusions. These investigations
show that use of the modern techniques of FTIR imaging
enables detection of the zoning of volatile species across
the studied samples, and possible configuration changes of
structurally-bound carbon molecular species (e.g., CO2 vs
CO3) during crystal growth. Such features, which are not
accessible with other micro-analytical techniques, may
provide information about the physicochemical properties
which act as constraints in the genesis of the samples, and
important information about the evolution of the geological
system. Tests performed with focal-plane-array detectors
(FPA) show that resolution close to the diffraction limit can
be achieved if the amounts of the target molecules in the
sample are substantially different. We also point out the
possibility of using FTIR imaging for investigations under
non-ambient conditions.
Type
article
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