Download Hyperspectral Core Imaging

View Core Logging in a New Light
See more with The GeoSpectral Image™
STANDARD CORE LOGGING
With the aid of a hand lens, scratcher and acid bottle, the geologist methodically records information on paper or digitally about the
diagnostic geologic features that can be identified through visual inspection of the core.
The image above is a typical log sheet used by geologists to log core. In this example, the geologist logged the box below as partially
decalcified with crosscutting calcite/quartz veins and local argillization.
A NEW APPROACH TO CORE LOGGING
TerraCore’s, The GeoSpectral Image™ presents hyperspectral data from the Visible Near Infrared (VNIR) and the Short Wave Infrared
(SWIR) portion of the electromagnetic spectrum in a single data cube. This allows geologist to see significant geologic information that
cannot be identified through visual inspection of core.
The GeoSpectral Image™ to the right of the core box shows that the limestone contains interbedded silty limestone with illitic alteration.
A small fracture with phengitic illite crosscuts the silty limestone. From 55 ft to 58 ft, quartz dominates the core in conjunction with an
increase in decalcification. Phengitic illite is also identified at the end of the box related to an increase in argillization. This suggests that
a small structure may have altered the illitic silty limestone to phengitic illite. The siltier and silicic area within the limestone appears to be
associated with anomalous gold values. The graph to the right shows the spectra used to identify the minerals.
WHY USE HYPERSPECTRAL CORE LOGGING?
• Focus more time analyzing and less time gathering geologic data
• Get accurate and consistent results, eliminating the need to conduct re-logging campaigns
• Obtain significant geologic information relative to the composition of a wide variety of minerals
• Store results electronically and load them into any database or modeling program
• Collect semi-quantitative mineral abundances of the core’s surface
• Map chip trays rapidly and efficiently
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