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QEMSCAN

January 01, 1970

QEMSCAN is the name for an integrated automated mineralogy and petrography system providing quantitative analysis of minerals, rocks and man-made materials. QEMSCAN is an abbreviation standing for quantitative evaluation of minerals by scanning electron microscopy, and a registered trademark owned by FEI Company since 2009. Prior to 2009, QEMSCAN was sold by LEO, a company jointly owned by Leica and ZEISS. The integrated system comprises a scanning electron microscope (SEM) with a large specimen chamber, up to four light-element energy-dispersive X-ray spectroscopy (EDS) detectors, and proprietary software controlling automated data acquisition. The offline software package iDiscover provides data processing and reporting functionality.

QEMSCAN
QEMSCAN Automated Mineralogy solution[buzzword]
InventorCSIRO
Inception2001
ManufacturerFEI Company
Availableyes
Current supplierFEI Australia Center of Excellence for Natural Resources
Last production year2013
Websitehttp://www.fei.com/applications/industry

Mineral identification and quantification edit

 
QEMSCAN image of a fluvial sandstone, grid size=500 µm

QEMSCAN creates phase assemblage maps of a specimen surface scanned by a high-energy accelerated electron beam along a predefined raster scan pattern. Low-count energy-dispersive X-ray spectra (EDX) are generated and provide information on the elemental composition at each measurement point. The elemental composition in combination with back-scattered electron (BSE) brightness and x-ray count rate information is converted into mineral phases.[1] QEMSCAN data includes bulk mineralogy and calculated chemical assays. By mapping the sample surface, textural properties and contextual information such as particle and mineral grain size and shape, mineral associations, mineral liberation, elemental deportment, porosity, and matrix density can be calculated, visualized, and reported numerically. Data processing capabilities include combining multiple phases into mineral groups, resolving mixed spectra (boundary phase processing), image-based filtering, and particle-based classification. Quantitative reports can be generated for any selected number of samples, individual particles, and for particle classes sharing similar compositional and/or textural attributes, such as size fractions or rock types.

Sample types and preparation edit

QEMSCAN is routinely employed in the analysis of rock- and ore-forming minerals. Sample preparation requirements include a level, dry specimen surface, coated with a thin electrically conductive layer (e.g. carbon). The sample must be stable under high vacuum conditions and the electron beam, typically 15 to 25 kV. Common sample types include 30 mm resin-impregnated blocks of drill cuttings and ore, thin sections of drill core and rocks, as well as soil samples. Very small particles such as atmospheric dust have been measured on carbon tape or filter paper. Coal samples are generally mounted in carnauba wax, providing sufficient contrast to allow for separation of the sample from the mounting medium, and subsequent measurement of coal and macerals.

Software suite edit

QEMSCAN consists of proprietary software package iDiscover which consists of four software modules:

  1. Datastore Explorer - data management module
  2. iMeasure - measurement module, SEM and EDS control
  3. iExplorer - data processing and classification tools, mineral database management, reports
  4. SIP editor - phase identification protocol

Measurement modes edit

QEMSCAN consists of five customisable measurement modes:

  1. BMA bulk mineralogical analysis
  2. PMA particle mineralogical analysis
  3. SMS specific mineral search
  4. TMS trace mineral search
  5. Field Image surface imaging mode

Applications edit

QEMSCAN measurements can be applied in quantitative mineral characterisation of rocks, weathering products such as regolith and soils, and most man-made materials. As a result, it has commercial and scientific applications in mining and mineral processing;[2] O&G;[3] coal;[4] environmental sciences;,[5][6] forensic geosciences;[7] archaeology;[8] agribusiness; built environment and planetary geology.[9]

History edit

  • 1970s CSIRO Australia devised a way to automatically use Energy-dispersive X-ray spectroscopy technology and a scanning electron microscope to accurately image and identify minerals in ore samples.[10] This technology became patented and known as QEM*SEM (quantitative evaluation of minerals by scanning electron microscopy)
  • 1980s New digital hardware and software developments by CSIRO allowed for automated analysis of multiple samples, creation of particle images form which mineralogy, texture and metallurgical parameters can be extracted and quantified.
  • 1990s Light element X-ray detectors are introduced improving the mineral identification. The Julius Kruttschnitt Mineral Research Centre at the University of Queensland develops the Mineral Liberation Analyzer (MLA) expert software.
  • 2001 CSIRO announces intention to commercialise QEMSCAN.
  • 2003 Intellection Pty Ltd. is founded to develop, market and sell QEMSCAN technology solutions[buzzword] based on the ZEISS EVO scanning electron microscope.
  • 2009 FEI Company announces the acquisition of selected assets from Intellection Pty Ltd., including the QEMSCAN technology.
  • 2010, June. Ammtec completes the first "on site" analysis, utilising an "R" series QEMSCAN, at an oil well drilling site in Sumatra, RI.
  • Sep.1, 2010 press release on version 5.0 iDiscover software including a new spectral analysis system capable of identifying 72 elements for improved complex mineral composition discrimination.
  • Nov.15, 2010 press release on new website launch for QEMSCAN and MLA Automated Mineralogy solutions[buzzword] for Natural Resources
  • Oct. 19, 2011 press release on introduction of QEMSCAN WellSite analysis solution[buzzword], field-tested on onshore and offshore oil platforms in collaboration with mudlogging service providers and oil & gas companies, including Halliburton, Oil Search Limited and Maersk.
  • 2015 Development of QEMSCAN ceases.

References edit

  1. ^ Gottlieb, P., Wilkie, G., Sutherland, D., Ho-Tun, E., Suthers, S., Perera, K., Jenkins, B., Spencer, S., Butcher, A., Rayner, J. 2000. Using quantitative electron microscopy for process mineralogy applications. JOM - Journal of the Minerals, Metals and Materials Society, 52, 4, 24-25. doi:10.1007/s11837-000-0126-9
  2. ^ Goodall, W.R., Scales, P.J., Butcher, A.R. 2005. The use of QEMSCAN and diagnostic leaching in the characterisation of visible gold in complex ores. Minerals Engineering, 18, 8, 877-886 doi:10.1016/j.mineng.2005.01.018
  3. ^ Fröhlich, S., Redfern, J., Petitpierre, L., J.D. Marshall, M. Power, Grech, P. 2010. Diagenetic evolution of incised channel sandstones: implications for reservoir characterisation of the Lower Carboniferous Marar Formation, Ghadames Basin, Western Libya. Journal of Petroleum Geology, 33; 3-18. abstract
  4. ^ Liu, Y., Gupta, R., Sharma, A., Wall, T., Butcher, A., Miller, G., Gottlieb, P., French, D. 2005. Mineral matter–organic matter association characterisation by QEMSCAN and applications in coal utilisation. Fuel, 84, 10, 1259–1267. doi:10.1016/j.fuel.2004.07.015
  5. ^ Haberlah, D., Williams, M.A.J., Halverson, G., Hrstka, T., Butcher, A.R., McTainsh, G.H., Hill, S.M., Glasby, P. 2010. Loess and floods: high-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia. Quaternary Science Reviews, 29, 19-20, 2673–2693. doi:10.1016/j.quascirev.2010.04.014
  6. ^ Haberlah, D., Strong, C., Pirrie, D., Rollinson, G.K., Gottlieb, P., Botha, W.S.K., Butcher, A.R. 2011. Automated petrography applications in Quaternary Science. Quaternary Australasia, 28(2), 3–12
  7. ^ Pirrie, D., Power, M.R., Rollinson, G.K., Wiltshire, P.E.J., Newberry, J., Campbell, H.E. 2005. Automated SEM-EDS (QEMSCAN) Mineral Analysis in Forensic Soil Investigations: Testing Instrumental Reproducibility. In:K. Ritz et al. (eds.) Criminal and Environmental Soil Forensics, 84, 10, 411-430, Springer Science doi:10.1007/978-1-4020-9204-6_26
  8. ^ Knappett, C., Pirrie, D., Power, M.R., Nikolakopoulou, I., Hilditch, J., Rollinson, G.K. 2005. Mineralogical analysis and provenancing of ancient ceramics using automated SEM-EDS analysis (QEMSCAN): A pilot study on LB I pottery from Akrotiri, Thera. Journal of Archaeological Science, in press doi:10.1016/j.jas.2010.08.022
  9. ^ Schrader, C.M., Rickman, D., Stoeser, D., Wentworth, S.J., Botha, P.W.S.K., Butcher, A.R., McKay, D., Horsch, H., Benedictus, A., Gottlieb, P. 2008. Analysis of Lunar Highland Regolith Samples from Apollo 16 Drive Core 64001/2 and Lunar Regolith Simulants - An Expanding Comparative Database. NASA Technical Report, MSFC-2144 abstract
  10. ^ Frost, M. T., O'Hara, K., Suddaby, P., Grant, G., Reid, A.F., Wilson, A.F., Zuiderwyk, M. 1977. A description of two automated control systems for the electron microprobe. X-Ray Spectrometry, 5, 4, 180-187. doi:10.1002/xrs.1300050403

External links edit

  • Automated Mineralogy Resources - Online repository for journal papers, conference abstracts, published reports and theses on SEM-EDS based automated mineralogy and petrography applications

January 01, 1970
qemscan, name, integrated, automated, mineralogy, petrography, system, providing, quantitative, analysis, minerals, rocks, made, materials, abbreviation, standing, quantitative, evaluation, minerals, scanning, electron, microscopy, registered, trademark, owned. QEMSCAN is the name for an integrated automated mineralogy and petrography system providing quantitative analysis of minerals rocks and man made materials QEMSCAN is an abbreviation standing for quantitative evaluation of minerals by scanning electron microscopy and a registered trademark owned by FEI Company since 2009 Prior to 2009 QEMSCAN was sold by LEO a company jointly owned by Leica and ZEISS The integrated system comprises a scanning electron microscope SEM with a large specimen chamber up to four light element energy dispersive X ray spectroscopy EDS detectors and proprietary software controlling automated data acquisition The offline software package iDiscover provides data processing and reporting functionality QEMSCANQEMSCAN Automated Mineralogy solution buzzword InventorCSIROInception2001ManufacturerFEI CompanyAvailableyesCurrent supplierFEI Australia Center of Excellence for Natural ResourcesLast production year2013Websitehttp www fei com applications industry Contents 1 Mineral identification and quantification 2 Sample types and preparation 3 Software suite 4 Measurement modes 5 Applications 6 History 7 References 8 External linksMineral identification and quantification edit nbsp QEMSCAN image of a fluvial sandstone grid size 500 µm QEMSCAN creates phase assemblage maps of a specimen surface scanned by a high energy accelerated electron beam along a predefined raster scan pattern Low count energy dispersive X ray spectra EDX are generated and provide information on the elemental composition at each measurement point The elemental composition in combination with back scattered electron BSE brightness and x ray count rate information is converted into mineral phases 1 QEMSCAN data includes bulk mineralogy and calculated chemical assays By mapping the sample surface textural properties and contextual information such as particle and mineral grain size and shape mineral associations mineral liberation elemental deportment porosity and matrix density can be calculated visualized and reported numerically Data processing capabilities include combining multiple phases into mineral groups resolving mixed spectra boundary phase processing image based filtering and particle based classification Quantitative reports can be generated for any selected number of samples individual particles and for particle classes sharing similar compositional and or textural attributes such as size fractions or rock types Sample types and preparation editQEMSCAN is routinely employed in the analysis of rock and ore forming minerals Sample preparation requirements include a level dry specimen surface coated with a thin electrically conductive layer e g carbon The sample must be stable under high vacuum conditions and the electron beam typically 15 to 25 kV Common sample types include 30 mm resin impregnated blocks of drill cuttings and ore thin sections of drill core and rocks as well as soil samples Very small particles such as atmospheric dust have been measured on carbon tape or filter paper Coal samples are generally mounted in carnauba wax providing sufficient contrast to allow for separation of the sample from the mounting medium and subsequent measurement of coal and macerals Software suite editQEMSCAN consists of proprietary software package iDiscover which consists of four software modules Datastore Explorer data management module iMeasure measurement module SEM and EDS control iExplorer data processing and classification tools mineral database management reports SIP editor phase identification protocolMeasurement modes editQEMSCAN consists of five customisable measurement modes BMA bulk mineralogical analysis PMA particle mineralogical analysis SMS specific mineral search TMS trace mineral search Field Image surface imaging modeApplications editQEMSCAN measurements can be applied in quantitative mineral characterisation of rocks weathering products such as regolith and soils and most man made materials As a result it has commercial and scientific applications in mining and mineral processing 2 O amp G 3 coal 4 environmental sciences 5 6 forensic geosciences 7 archaeology 8 agribusiness built environment and planetary geology 9 History edit1970s CSIRO Australia devised a way to automatically use Energy dispersive X ray spectroscopy technology and a scanning electron microscope to accurately image and identify minerals in ore samples 10 This technology became patented and known as QEM SEM quantitative evaluation of minerals by scanning electron microscopy 1980s New digital hardware and software developments by CSIRO allowed for automated analysis of multiple samples creation of particle images form which mineralogy texture and metallurgical parameters can be extracted and quantified 1990s Light element X ray detectors are introduced improving the mineral identification The Julius Kruttschnitt Mineral Research Centre at the University of Queensland develops the Mineral Liberation Analyzer MLA expert software 2001 CSIRO announces intention to commercialise QEMSCAN 2003 Intellection Pty Ltd is founded to develop market and sell QEMSCAN technology solutions buzzword based on the ZEISS EVO scanning electron microscope 2009 FEI Company announces the acquisition of selected assets from Intellection Pty Ltd including the QEMSCAN technology 2010 June Ammtec completes the first on site analysis utilising an R series QEMSCAN at an oil well drilling site in Sumatra RI 1 Sep 1 2010 press release on version 5 0 iDiscover software including a new spectral analysis system capable of identifying 72 elements for improved complex mineral composition discrimination Nov 15 2010 press release on new website launch for QEMSCAN and MLA Automated Mineralogy solutions buzzword for Natural Resources Oct 19 2011 press release on introduction of QEMSCAN WellSite analysis solution buzzword field tested on onshore and offshore oil platforms in collaboration with mudlogging service providers and oil amp gas companies including Halliburton Oil Search Limited and Maersk 2015 Development of QEMSCAN ceases References edit Gottlieb P Wilkie G Sutherland D Ho Tun E Suthers S Perera K Jenkins B Spencer S Butcher A Rayner J 2000 Using quantitative electron microscopy for process mineralogy applications JOM Journal of the Minerals Metals and Materials Society 52 4 24 25 doi 10 1007 s11837 000 0126 9 Goodall W R Scales P J Butcher A R 2005 The use of QEMSCAN and diagnostic leaching in the characterisation of visible gold in complex ores Minerals Engineering 18 8 877 886 doi 10 1016 j mineng 2005 01 018 Frohlich S Redfern J Petitpierre L J D Marshall M Power Grech P 2010 Diagenetic evolution of incised channel sandstones implications for reservoir characterisation of the Lower Carboniferous Marar Formation Ghadames Basin Western Libya Journal of Petroleum Geology 33 3 18 abstract Liu Y Gupta R Sharma A Wall T Butcher A Miller G Gottlieb P French D 2005 Mineral matter organic matter association characterisation by QEMSCAN and applications in coal utilisation Fuel 84 10 1259 1267 doi 10 1016 j fuel 2004 07 015 Haberlah D Williams M A J Halverson G Hrstka T Butcher A R McTainsh G H Hill S M Glasby P 2010 Loess and floods high resolution multi proxy data of Last Glacial Maximum LGM slackwater deposition in the Flinders Ranges semi arid South Australia Quaternary Science Reviews 29 19 20 2673 2693 doi 10 1016 j quascirev 2010 04 014 Haberlah D Strong C Pirrie D Rollinson G K Gottlieb P Botha W S K Butcher A R 2011 Automated petrography applications in Quaternary Science Quaternary Australasia 28 2 3 12 Pirrie D Power M R Rollinson G K Wiltshire P E J Newberry J Campbell H E 2005 Automated SEM EDS QEMSCAN Mineral Analysis in Forensic Soil Investigations Testing Instrumental Reproducibility In K Ritz et al eds Criminal and Environmental Soil Forensics 84 10 411 430 Springer Science doi 10 1007 978 1 4020 9204 6 26 Knappett C Pirrie D Power M R Nikolakopoulou I Hilditch J Rollinson G K 2005 Mineralogical analysis and provenancing of ancient ceramics using automated SEM EDS analysis QEMSCAN A pilot study on LB I pottery from Akrotiri Thera Journal of Archaeological Science in press doi 10 1016 j jas 2010 08 022 Schrader C M Rickman D Stoeser D Wentworth S J Botha P W S K Butcher A R McKay D Horsch H Benedictus A Gottlieb P 2008 Analysis of Lunar Highland Regolith Samples from Apollo 16 Drive Core 64001 2 and Lunar Regolith Simulants An Expanding Comparative Database NASA Technical Report MSFC 2144 abstract Frost M T O Hara K Suddaby P Grant G Reid A F Wilson A F Zuiderwyk M 1977 A description of two automated control systems for the electron microprobe X Ray Spectrometry 5 4 180 187 doi 10 1002 xrs 1300050403External links editAutomated Mineralogy Resources Online repository for journal papers conference abstracts published reports and theses on SEM EDS based automated mineralogy and petrography applications Retrieved from https en wikipedia org w index php title QEMSCAN amp oldid 1142278323, wikipedia, wiki, book, books, library,

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