ASD TerraSpec Halo Mineral Identifier

Portable full-range handheld spectrometer that is fast, accurate, and easy to use for the exploration geology market

For exploration and mine geologists, the ASD TerraSpec Halo mineral identifier is the next generation all-in-one mineral identifier/analysis system that allows you to immediately identify alteration minerals with a simple pull of a trigger for faster delineation of alteration, speedier core logging and quick confirmation of ore mineralogy.

The ASD TerraSpec Halo mineral identifier is a full-range VIS-NIR-SWIR spectrometer measuring the visible, near-infrared and short-wave infrared regions (350-2500 nm) that produces immediate on-instrument results using a non-destructive contact measurement. The instrument includes internal references to allow for easy operation and data management and also features proprietary, state-of-the-art mineral identification software for fast data capture in the field, and easy data management back in the lab or core shack. 

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Features and benefits

The ASD TerraSpec Halo handheld spectrometer delivers rapid mineral identification that significantly speeds exploration efforts, increases efficiency, improves analysis and decision making, and ultimately saves exploration programs valuable time and money. Benefits include:

  • Handheld
    Lightweight design and ruggedness allow for unprecedented portability. The fully integrated, full-range spectrometer with on-board mineral identification software eliminates the need for cumbersome cables or third-party devices. 
  • Fast and accurate
    Powerful on-board software allows for mineral results in seconds, including confidence rating and spectral scalars that give you even more information about your deposit. 
  • No cables
    Don’t get tangled up in fragile cables from your spectrometer to your contact probe. And don’t worry about putting down your third-party PDA and losing it. The TerraSpec Halo is an all-in-one device – one hand, one click. 
  • Simple mineral data capture and handling
    Data can be automatically saved on the instrument and later exported to any Windows computer. Use the intuitive Halo manager software for easy file naming, clear graphical spectrum and results review, and unprecedented spectrum management and export tools. 
  • No more lost notes or locations
    GPS and voice memo features allow you to geotag and record audio notes with every measurement. 
  • Immediate multi-mineral results and scalars
    TerraSpec Halo doesn’t give you just one mineral prediction. It gives you multi-mineral predictions, confidence levels and spectral scalars that allow you to monitor crystallinity changes, subtle shifts in alteration patterns and compositional changes associated within geochemical gradients. 
  • Extensive spectral library
    Comprehensive multi-continent spectral library.
  • User-friendly features
    Highly portable, the TerraSpec Halo is designed with audio and visual tools for easy operation, fast data collection and superb workflow. With a few clicks, optimize performance for both light or dark rocks. 
  • No third-party hardware
    Everything you need for the field is on the device. Download your spectral data from the TerraSpec Halo to your own laptop where you can export the data to The Spectral Geologist (TSG®), Leapfrog or other third-party software tools of your choice. 
  • Spectrum management
    Review spectra on the device or on your laptop. Laptop software allows for easy spectrum management with user-friendly file naming, spectrum review and tagging, and easy import/export capability. 

The output from the ASD TerraSpec Halo can be exported to be used by The Spectral Geologist (TSG) software from Spectral Geoscience to provide additional analysis of the spectra and produce mineralogical output products.

Key applications

ASD’s spectroradiometers have been used for decades for remote geologic interpretation. The ASD TerraSpec Halo mineral identifier can be used in many industry applications, including: 

Petroleum Exploration 
Petroleum geologists utilize ASD instruments for improved definition of deposit mineralogy, real-time strata correlation, hole stability monitoring and dolomite porosity determination. 

Mining Production and Mineral Processing 
Evaluate and monitor mineral and ore properties to maximize a variety of mining processes and operations. 

Mining Exploration 
Rapid identification of mineral deposit alteration assemblages. 

Remote Sensing and Geology 

Mineral/energy exploration 

Alteration mapping 

Greenfields/brownfields exploration 

Outcrop/hand samples 

Mine mapping 

Drill cuttings 

Core logging 

Clay species analysis  

Confirmation sampling 


Spectral Range (nm)350-2500
Spectral Resolution3 nm @ 700 nm
9.8 nm @ 1400 nm
8.1 nm @ 2100 nm
Height x Width x Depthcm: 31 x 10 x 30
in: 12.3 x 4.0 x 11.7
Weight with battery2.5 kg
5.5 lbs
Weight without battery2.0 kg
4.3 lbs

With a simple push of a button, it delivers mineralogy results in a matter of seconds, a rapid method to identify minerals and decrease associated exploration costs. Great results, easy to use.

Cristian Morales — Universidad de Chile