Identifying Carbonates
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
1 Canal Street  ◊  Unit B1
Lawrence, MA 01840  USA
Tel: 978 687-1833  ◊  Fax: 978 945-0372

Copyright © 2012 Spectral Evolution, Inc
An oreXpress field spectrometer with EZ-ID mineral identification
software can be used in the field to identify carbonates in the major
groups: calcite, dolomite and aragonite. Within these groups are
minerals such as rhodochrosite, azurite, malachite, cerussite,
magnesite, smithsonite, siderite, strontianite and witherite.
Carbonate ions join with metal cations to form carbonate minerals
which show major absorption features at 2290 to 2350 nanometers.

EZ-ID can match your unknown samples to known carbonate samples
in its many libraries. It can help you to distinguish among hard to
discriminate carbonate minerals such as calcite and dolomite.
Dolomite has a large absorption feature between 800 and 1600nm
due to iron and has a larger water feature than calcite. Features for
dolomite in general have longer wavelengths than similar features in
calcite. EZ-ID matches the target samples to known library samples.

The oreXpress delivers full range, UV/VIS/NIR capabilities from
350-2500nm, is lightweight (under 7 lbs), rugged, includes integral
autoexposure and auto-dark shutter, and comes with a handheld
GETAC microcomputer with digital camera, GPS, and voice notes that
can be tagged to your spectra.

In addition, our DARWin Data Acquisition software saves  your scans
as ASCII files for use (without pre-processing) with third party
software, including 3D mapping and mining programs
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
Comparing calcite and dolomites spectra in DARWin SP Data Acquisition software
multi-plot scan
Calcite spectra identified by EZ-ID by comparing to two spectral libraries.
Dolomite spectra identified by EZ-ID.