Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation
This paper demonstrates a novel approach that uses wavelet tessellation in rapid analysis of raw geochemical data produced by laser-induced breakdown spectroscopy (LIBS) to produce pseudologs that are representative of stratigraphy. Single-line LIBS spectral data for seven major rock-forming element...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/3/312 |
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| author | Fernando F. Fontana Steven Tassios Jessica Stromberg Caroline Tiddy Ben van der Hoek Yulia A. Uvarova |
| author_facet | Fernando F. Fontana Steven Tassios Jessica Stromberg Caroline Tiddy Ben van der Hoek Yulia A. Uvarova |
| author_sort | Fernando F. Fontana |
| collection | DOAJ |
| description | This paper demonstrates a novel approach that uses wavelet tessellation in rapid analysis of raw geochemical data produced by laser-induced breakdown spectroscopy (LIBS) to produce pseudologs that are representative of stratigraphy. Single-line LIBS spectral data for seven major rock-forming elements (Al, Ca, Fe, Mg, Si, Na and K) were collected from a synthetic 22-sample rock-block comprising two distinct lithological groups based on mineralogy, chemistry and texture: plutonic rocks and marble. Seven sublithologies are identified within the rock-block from traditional laboratory whole-rock geochemical analysis: marble, Mg-marble, granite, quartz monzonite, foidolite, granodiorite and gabbroic diorite. Two-domain clustering (k = 2) on raw spectral LIBS data combined with wavelet tessellation was applied to generate a simplified lithological stratigraphy of marble and plutonic rocks and generate a pseudolog identical to the rock-block stratigraphy. A pseudolog generated from seven-domain clustering (k = 7) and wavelet tessellation successfully discriminated most sublithologies within the rock-block slabs, especially marble slabs. Small-scale units were identified within the more mineralogically and geochemically complex plutonic slabs. The spatial resolution of the LIBS analysis, with a measurement spacing of ~0.35 mm, allowed for assessment of individual mineral compositions and rock textures, and small-scale units within the plutonic rocks can be correlated to specific coarse-grained minerals or mineralogical associations. The application of the wavelet tessellation method to raw LIBS geochemical data offers the possibility of rapid and objective lithogeochemical analysis and interpretations which can predate further analysis (quantitative) and supplement geological logging. |
| first_indexed | 2024-03-10T13:08:20Z |
| format | Article |
| id | doaj.art-099d8c0ff360491abd6917d8628ec616 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T13:08:20Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-099d8c0ff360491abd6917d8628ec6162023-11-21T10:56:13ZengMDPI AGMinerals2075-163X2021-03-0111331210.3390/min11030312Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and InterpretationFernando F. Fontana0Steven Tassios1Jessica Stromberg2Caroline Tiddy3Ben van der Hoek4Yulia A. Uvarova5Future Industries Institute, UniSA STEM, University of South Australia, Mawson Lakes, SA 5000, AustraliaMineral Exploration Cooperative Research Centre (MinEx CRC), Mawson Lakes, SA 5000, AustraliaMineral Exploration Cooperative Research Centre (MinEx CRC), Mawson Lakes, SA 5000, AustraliaFuture Industries Institute, UniSA STEM, University of South Australia, Mawson Lakes, SA 5000, AustraliaFuture Industries Institute, UniSA STEM, University of South Australia, Mawson Lakes, SA 5000, AustraliaMineral Exploration Cooperative Research Centre (MinEx CRC), Mawson Lakes, SA 5000, AustraliaThis paper demonstrates a novel approach that uses wavelet tessellation in rapid analysis of raw geochemical data produced by laser-induced breakdown spectroscopy (LIBS) to produce pseudologs that are representative of stratigraphy. Single-line LIBS spectral data for seven major rock-forming elements (Al, Ca, Fe, Mg, Si, Na and K) were collected from a synthetic 22-sample rock-block comprising two distinct lithological groups based on mineralogy, chemistry and texture: plutonic rocks and marble. Seven sublithologies are identified within the rock-block from traditional laboratory whole-rock geochemical analysis: marble, Mg-marble, granite, quartz monzonite, foidolite, granodiorite and gabbroic diorite. Two-domain clustering (k = 2) on raw spectral LIBS data combined with wavelet tessellation was applied to generate a simplified lithological stratigraphy of marble and plutonic rocks and generate a pseudolog identical to the rock-block stratigraphy. A pseudolog generated from seven-domain clustering (k = 7) and wavelet tessellation successfully discriminated most sublithologies within the rock-block slabs, especially marble slabs. Small-scale units were identified within the more mineralogically and geochemically complex plutonic slabs. The spatial resolution of the LIBS analysis, with a measurement spacing of ~0.35 mm, allowed for assessment of individual mineral compositions and rock textures, and small-scale units within the plutonic rocks can be correlated to specific coarse-grained minerals or mineralogical associations. The application of the wavelet tessellation method to raw LIBS geochemical data offers the possibility of rapid and objective lithogeochemical analysis and interpretations which can predate further analysis (quantitative) and supplement geological logging.https://www.mdpi.com/2075-163X/11/3/312LIBSwavelet tessellationlithogeochemistrygeological loggingmultivariate analysis<i>k</i>-means |
| spellingShingle | Fernando F. Fontana Steven Tassios Jessica Stromberg Caroline Tiddy Ben van der Hoek Yulia A. Uvarova Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation Minerals LIBS wavelet tessellation lithogeochemistry geological logging multivariate analysis <i>k</i>-means |
| title | Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation |
| title_full | Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation |
| title_fullStr | Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation |
| title_full_unstemmed | Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation |
| title_short | Integrated Laser-Induced Breakdown Spectroscopy (LIBS) and Multivariate Wavelet Tessellation: A New, Rapid Approach for Lithogeochemical Analysis and Interpretation |
| title_sort | integrated laser induced breakdown spectroscopy libs and multivariate wavelet tessellation a new rapid approach for lithogeochemical analysis and interpretation |
| topic | LIBS wavelet tessellation lithogeochemistry geological logging multivariate analysis <i>k</i>-means |
| url | https://www.mdpi.com/2075-163X/11/3/312 |
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