Spectral Evolution geological spectrometers are designed for field use, including exploration for gold. With our oreXpress, oreXplorer or oreXpert spectrometer, and EZ-ID mineral identification software, exploration geologists have the field and core shack toolset necessary for an excellent Return-On-Investment while improving the effectiveness of drilling.

The oreXpress, oreXplorer and oreXpert geological spectrometers can be used in field mapping and exploration of many gold deposit types, including:

• Paleoplacer deposits
• Massive sulphide deposits
• Hot spring deposits
• Adularia/sericite epithermal deposits (low sulfidation)
• Alunite/kaolinite epithermal deposits (high sulfidation)
• Breccia pipe deposits
• Porphyry gold deposits
• Skarns
• Orogenic deposits
• Carbonate placement deposits
• Greenstone belts

With our field spectrometers, geologists can scan and identify common alteration minerals, for example:

• Low sulfidation deposits – illite, kaolinite, chlorites, illite/smectite, buddingtonite, epidote, montmorillonite, zeolites, quartz, calcite, hematite
• High sulfidation – alunite, opal, dickite, pyrophyllite, diaspore, zunyite, topaz, illite, kaolinite, chlorites, illite/smectite, epidote, quartz, montmorillonite, geothite, jarosite, hematite
• Orogenic gold – muscovite, paragonite muscobite, roscoelite, illite, kaolinite, quartz, siderite, ankerite, calcite, dolomite, chlorites, carbonates

Every oreXpress, oreXplorer and oreXpert includes our DARWin SP Data Acquisition software and is available with EZ-ID and the Custom Library Builder Module. EZ- ID allows you to compare your target sample with a known library of mineral spectra. EZ-ID comes with the USGS spectral library and is available with the GeoSPEC library and the SpecMIN mineral library from Spectral International.

EZ-ID features:

• Fast and accurate identification of an unknown mineral to a known spectral library sample
• Ease-of-use: take your scan using an oreXpress or SR-6500 and see results in real-time
• Simple, consistent user interface
• USGS, SpecMIN, and GeoSPEC libraries
• Weighted score for best matches
• Include or exclude spectral regions of interest for optimal results

oreXpress, oreXplorer and oreXpert field portable spectrometers for mineral identification

SPECTRAL EVOLUTION’S EZ-ID software has identified our target sample as kaolinite using the USGS spectral library for reference. The shaded areas shown in the scan allow a geologist to concentrate on regions in the spectra of particular interest.