High-resolution thin-section imaging and elemental mapping 

At H-Expertise Services, we utilize advanced imaging and analytical techniques to provide comprehensive insights into the geological and geochemical characteristics of your samples. Our services include high-resolution thin-section imaging, cathodoluminescence petrography, and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS) for chemical mapping. By integrating these advanced imaging techniques, we provide a comprehensive toolkit for characterizing geological samples that also support and help interpreting all our other analytical services.  

High-resolution thin-section imaging with Keyence VHX 7000N

Our high-resolution thin-section imaging service, using the Keyence VHX 7000N microscope, provides unparalleled detail on the microstructures and mineral compositions of rock samples. This precision aids in the accurate interpretation of geological processes and history, crucial for effective resource management.

  • Raster build-up and composite imaging: We create high-resolution composite images by summing up to 500+ individual images, tailored to the resolution requested by the client. This allows for detailed analysis of the entire thin section.
  • 3D profiling: The Keyence microscope also generates 3D profiles of ablation spots in both carbonate and zircon samples. This is essential for quality checks and petrographic phase identification in 3D space.
  • Fluid inclusion imaging: Investigate fluid inclusion density in diagenetic phases, providing insights into fluid migration and thermal history within the geological sample.
Figure 1. The Keyence VHX 7000N microscope setup for high-resolution imaging, shown with its display, microscope, and an operator analysing data (Xavier Mangenot).

Cathodoluminescence Petrography

Cathodoluminescence (CL) imaging reveals the internal structures and growth zones of minerals that are not visible under standard light microscopy. This technique is invaluable for understanding the history and diagenetic processes of minerals. CL imaging may also be used in conjunction with laser ablation spots for U-Pb dating, providing detailed information about the sample, including diagenetic and cementation history. It may help in analyzing single growth zones or very detailed specific diagenetic features (e.g. Syntaxial cement around echinoderm). 

LA-ICPMS for chemical mapping

Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS) enables precise elemental mapping of minerals, offering insights into their major and trace chemical compositions.

Elemental maps: LA-ICPMS can generate detailed maps at various spatial resolution showing the distribution of elements such as uranium (U), thorium (Th), and lead (Pb) within the samples (used for U/Pb dating). We can map a large variety of elements (e.g. Sr, Mg, Ca, Mn) in different minerals. Please contact Xavier Mangenot for more detail.

Figure 2. This figure demonstrates elemental mapping by LA-ICPMS for uranium (U), thorium (Th), and lead (Pb). The left image shows a mineral sample with visible ablation tracks, indicating where the laser ablated material for analysis. The middle images display the concentration distributions of U and Th, with colour scales representing varying concentrations (U in ppm and Th in counts per second). The right image depicts the U/Pb ratio, crucial for U-Pb dating, with red areas showing higher ratios and blue areas indicating lower ratios. The bottom left corner shows the LA-ICPMS setup, essential for precise elemental analyses and mapping.

Contact us

At H-Expertise Services, we leverage advanced techniques, state-of-the-art equipment, and the expertise of our geochemist with decades of practical experience to ensure you receive precise and insightful data, deepening your understanding of geological systems.  Partner with us for unmatched expertise and impactful results. Please contact our specialist, Xavier Mangenot, at xavier.mangenot@h-expertise-services.com to discuss your operational needs, pricing, and to design a customized analytical strategy tailored to your requirements.

Recent Case Studies and Geological Projects

Interested in the practical applications of our geochemistry analysis services? For detailed examples of recent case studies and geological projects we have undertaken, please visit our case study section. Discover how our advanced techniques have delivered crucial insights and improved reservoir understanding for our clients.….read more here