ZEISS Mineralogic – Quantitative Geochemical and Petrological Analysis
The Scanning Electron Microscope (SEM) is the most prolific piece of analytical equipment in the Earth Sciences, therefore quantitative mineral chemistry obtained directly from the SEM has the potential to streamline many geological fields.
Mineral chemistry provides direct constraints on geological processes, as a result major element analyses of rock forming minerals have been one of the major contributors to geochemistry for decades.
Electron beam techniques have been the most widely used method of obtaining in situ major element chemistry, dominated by the quantitative Wavelength Dispersive Spectroscopy (WDS) employed by the Electron Probe Micro Analyzer (EMPA). More rapid, and typically more qualitative Energy Dispersive Spectroscopy (EDS) major element measurements can easily be obtained on a standard SEM instrument.
Although automated EDS mineral mapping via SEM has remained essentially unchanged for decades, with an experienced operator required for many of the analytical tasks, ZEISS Mineralogic Automated Quantitative Mineralogy (AQM) takes a new approach following an analytical protocol more closely aligned with EPMA.
A combination of matrix corrections, peak deconvolution, and standard calibration allows peak intensities to be converted into wt% element directly at the time of analysis. The result is a data output that can be immediately interpreted, even for minerals not previously analyzed, by both new and experienced users.
AxioSCAN – Digital Petrology and Meaningful Correlations
Light microscopy is central to most petrological investigations. This technique provides a simple and effective method for earth scientists to investigate their samples. In recent years, these petrological investigations have become more digital, with digital cameras coupled to petrographic microscopes and software used to acquired images.
With the AxioSCAN we will outline a further digital revolution in light microscopy and petrography studies. We will show how an automated and high throughput slide scanning microscope can be used to digitally capture high resolution images to produce a single digital image of the entire thin section. We will also outline how machine learning driven segmentation can provide quantitative data and be used in a correlative workflow with the SEM.
- ZEISS Mineralogic is a unique analytical SEM, combining automated mineral mapping with quantitative geochemical analysis.
- AQM allows for bulk sample chemistry to be obtained at any scale within a petrographic thin section.
- Standard calibrated quantitative EDS can allow geological conditions to be constrained with direct context to petrographic observations samples.
- The ZEISS AxioSCAN is able to provide an innovative revolution of traditional light microscopy based petrographic analysis.
- Digitization, correlation with the scanning electron microscope and machine learning based mineral segmentation and quantification are some of the latest developments available.
Speaker: Mr. Shaun Graham - Business Development Manager, Materials Research, ZEISS, APAC
Schedule: August 20, 2020 | Thursday | 10:30 AM - 11:30 AM (IST)
Speaker Profile | Mr. Shaun Graham
Business Development Manager, Materials Research, ZEISS APAC
- Joined ZEISS in Cambridge, UK as an application specialist for SEM imaging and analysis in 2013.
- Involved in the marketing and product development for the FESEM, X-ray Microscope, ZEISS Mineralogic and Correlative software as part of the business sector team in 2015.
- Responsible for the the business development of the Raw Materials sub-segment in 2019 and currently drives growth for the Materials Research sub-segment as the Business Development Manager in the Asia-Pacific region.