Coal Exploration
 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
Coal is a naturally combustible solid that is still an important fossil
fuel especially for generating electricity. Coal is classified by
hardness and carbon content as anthracite, bituminous coal, sub-
bituminous coal, and lignite.

Spectroscopy can be used in coal exploration to identify coal  as well
as related minerals including: quartz, kaolinite, illite, montmorillonite,
chlorite, pyrite, calcite, and siderite. Coal exhibits important  spectral
absorption features at 680, 1429-1441, 1915 and 2296-2300

Spectral Evolution’s SR-6500 with three thermoelectrically cooled
photodiode arrays delivers the ultimate in high resolution and stable
performance for coal exploration. The SR-6500 offers the ultimate in
high resolution  in a portable instrument:
  • 1.5nm @ 700nm
  • 3.0nm @ 1500nm
  • 3.8nm @ 2100nm

The SR-6500 can be used with bare fiber or field of view fiber-
attached lenses for field outcrop analysis or with our ILM-660 100
Watt tungsten halogen light source or for lab and core shack analysis
the Miniprobe contact probe with a 3mm spot size and built-in light
source. With the Miniprobe or ILM-660, the SR-6500 is well-suited for
capturing high resolution scans of coal pathfinder minerals or coal
itself. These scans will show additional features not seen with
standard resolution spectrometers.

Using the SR-6500 with EZ-ID, a geologist can quickly identify an
alteration mineral that may not be readily identifiable by sight,
matching an unknown sample against a known spectral library. EZ-ID
allows the geologist to select specific spectral regions to fine-tune
the matching process for a more precise ID. If the geologist wants to
look at a particular absorption feature, the geologist can highlight
that or other features and EZ-ID provides new matches. EZ-ID
includes a Library Builder module for the inclusion of project and
location specific scans of known samples for comparison with target

EZ-ID works right from the DARWin SP Data Acquisition software
included with all SPECTRAL EVOLUTION spectrometers and
spectroradiometers. All spectra collected with an oreXpress are
saved as ASCII files for easy import into other 3rd party analysis
software for mine planning, mineral mapping and 3D imaging.
 First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
The SR-6500 allows you to focus on features that are not apparent with a lower
resolution instrumewnt. With EZ-ID you can build your own library from known coal
samples to match to target samples for fast identification.
The SR-6500 delivers the highest resolution available in a portable spectrometer.
Download our SR-6500 brochure for more information.