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GD-C1201
GOLD
Product Description
Structural geology demands more than visual inspection; it requires precise measurement of fracture orientation, spacing, aperture, and surface characteristics. The GD-C1201 Intelligent Drillhole Optical Imager serves as a quantitative structural geology workstation, providing the measurement tools, spatial reference framework, and data export capabilities necessary for rigorous discontinuity analysis, kinematic modeling, and rock mass classification.
Measurement Toolset: The TENSENSE2010 software includes three dedicated extraction tools designed for structural analysis. The crack width tool measures perpendicular distance across a fracture by click-and-drag, displaying the width in centimeters or millimeters and optionally adding it to the core attribute sheet. The orientation extraction tool captures strike and dip by clicking at the fracture's highest and lowest visible points; the software calculates the apparent dip plane and converts to true dip using borehole orientation data, displaying results in user-selectable formats (azimuth/dip, dip direction/dip, or quadrant notation). The rectangular area tool measures feature dimensions by bounding box, useful for estimating void sizes or alteration zone extents. All measurements are stored in the database with depth and orientation metadata, enabling statistical analysis across the entire borehole.
Spatial Reference Framework: The system maintains consistent coordinate conventions throughout the measurement process. The depth coordinate can be displayed as measured depth from collar or as elevation (requiring collar elevation input). The orientation reference can be set to geographic north, magnetic north, or grid north, with the software applying the user-specified angle error correction. The aperture parameter (borehole diameter) must be specified because the displayed feature width in the unwrapped image depends on hole diameter; the software applies trigonometric correction to compute true feature dimensions. This rigorous spatial framework ensures that measurements taken from the image correspond to real-world geometric parameters usable in engineering calculations.
Technical Specifications: The Structural Analysis Platform
| Analysis Requirement | Software/Hardware Feature | Quantitative Output |
|---|---|---|
| Fracture Orientation | 0.1° compass resolution; vertex-to-lowest-point extraction; coordinate convention selection | Strike and dip (format selectable) with 0.1° accuracy, logged to attribute sheet |
| Fracture Aperture | 0.1mm image resolution; perpendicular click-drag measurement; aperture parameter correction | True fracture width (mm/cm) corrected for borehole diameter, enabling hydraulic aperture estimation |
| Fracture Spacing | Continuous depth tracking; automated interval measurement between extracted features | Spacing statistics (mean, min, max, standard deviation) exportable for RMR/Q-system inputs |
| Fracture Surface Character | High-resolution imagery; adjustable brightness/contrast; zoom capability | Qualitative description (rough/smooth/planar/irregular) recorded in lithology sheet |
| Rock Quality Designation | 0.1mm depth resolution; core segment definition; automatic RQD calculation | RQD percentage per specified depth interval, directly comparable to core-based methods |
Integration with Industry Standards: The system's outputs align with established geotechnical classification systems. The measured fracture orientations feed directly into stereonet analysis (via exported CSV files), enabling identification of joint sets and computation of mean orientations. The spacing data supports Rock Mass Rating (RMR) calculation by providing the "joint spacing" rating parameter. The fracture surface descriptions (roughness, alteration, infilling) correspond to Q-system joint condition ratings. The borehole wall imagery serves as a digital substitute for physical core in RQD determination, with the added advantage of preserving in-situ orientation.
Advanced Analytical Features: The software supports multiple borehole correlation through the image merge function, which allows combining images from adjacent boreholes into a composite structural model. The 3D histogram view displays fractures as three-dimensional surfaces wrapped around the borehole, enabling visualization of structural patterns that are not apparent in planar development charts. The print output can include stereonets and rosette diagrams generated from extracted orientation data, producing integrated structural geology reports directly from the software.
The Structural Geologist's Verdict: For professionals whose work depends on precise discontinuity characterization, the GD-C1201 delivers laboratory-grade measurement accuracy in field-deployable form. It eliminates the subjectivity and approximation inherent in manual compass-and-clinometer measurements on broken core, replacing them with repeatable, digitally recorded, spatially referenced observations that stand up to peer review and regulatory scrutiny.
