Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective
This study presents an innovative solution for detecting complex geological formations, particularly in areas where field surveys are difficult or impossible. Even when feasible, conventional surveys often fail to delineate subtle lithological transitions without extensive laboratory analysis, which...
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Elsevier
2025-08-01
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| Series: | International Journal of Applied Earth Observations and Geoinformation |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1569843225003668 |
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| author | Huy Hoa Huynh Jaehyung Yu Lei Wang Trung Hieu Pham Jin-Young Lee |
| author_facet | Huy Hoa Huynh Jaehyung Yu Lei Wang Trung Hieu Pham Jin-Young Lee |
| author_sort | Huy Hoa Huynh |
| collection | DOAJ |
| description | This study presents an innovative solution for detecting complex geological formations, particularly in areas where field surveys are difficult or impossible. Even when feasible, conventional surveys often fail to delineate subtle lithological transitions without extensive laboratory analysis, which alone cannot define spatial distribution. We interpreted the geology of an inaccessible limestone quarry using an integrated approach combining petrographic, chemical, and spectral analyses with close-range hyperspectral remote sensing. Petrographic and chemical analyses revealed that the outcrop was significantly altered by igneous intrusion, resulting in distinct mineralogical and lithological transitions within both igneous and carbonate bodies. Late-stage magmatic and hydrothermal activity produced four discrete igneous phases and widespread metasomatism. Hydrothermal alteration caused extensive dolomitization, transforming the original limestone units. These transitions are characterized by calcite and sericite formations in igneous rocks and quartz in carbonate rocks. Spectrally, dyke displayed Al-OH absorption indicative of plagioclase and sericite, while metasomatic interactions introduced secondary calcite with additional CO32– absorption. Dolomitization is further distinguished by Mg-OH absorption features. A 3D-CNNs model combined with spectral normalization effectively mapped these transition lithologies, clearly revealing the geological processes imprinted in the outcrop. Most dykes show intensive metasomatic, with only core portions retain pure igneous signatures. Limestones are concentrated near dyke contacts, suggesting marble formation via contact metamorphism, while dolostone dominated the outcrop due to regional dolomitization. The mapping results provide a preliminary resource assessment indicating that igneous intrusion has reduced the economic value by approximately 80% compared to pure limestone. This integrated approach accurately represents gradational lithological boundaries, addressing the limitations of conventional survey methods. |
| format | Article |
| id | doaj-art-cd9dd7416d074c66b09de730e86b7295 |
| institution | Kabale University |
| issn | 1569-8432 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Applied Earth Observations and Geoinformation |
| spelling | doaj-art-cd9dd7416d074c66b09de730e86b72952025-08-20T03:45:11ZengElsevierInternational Journal of Applied Earth Observations and Geoinformation1569-84322025-08-0114210471910.1016/j.jag.2025.104719Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspectiveHuy Hoa Huynh0Jaehyung Yu1Lei Wang2Trung Hieu Pham3Jin-Young Lee4Department of Earth, Environmental & Space Sciences (Geological Sciences), Chungnam National University, Deajeon 34134, South KoreaDepartment of Geological Sciences, Chungnam National University, Daejeon 34134, South Korea; Corresponding authors.Department of Geography and Anthropology, Louisiana State University, Baton Rouge, LA 70803, USAFaculty of Geology, University of Science, Ho Chi Minh 700000, VietnamQuaternary Environmental Research Center, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, South KoreaThis study presents an innovative solution for detecting complex geological formations, particularly in areas where field surveys are difficult or impossible. Even when feasible, conventional surveys often fail to delineate subtle lithological transitions without extensive laboratory analysis, which alone cannot define spatial distribution. We interpreted the geology of an inaccessible limestone quarry using an integrated approach combining petrographic, chemical, and spectral analyses with close-range hyperspectral remote sensing. Petrographic and chemical analyses revealed that the outcrop was significantly altered by igneous intrusion, resulting in distinct mineralogical and lithological transitions within both igneous and carbonate bodies. Late-stage magmatic and hydrothermal activity produced four discrete igneous phases and widespread metasomatism. Hydrothermal alteration caused extensive dolomitization, transforming the original limestone units. These transitions are characterized by calcite and sericite formations in igneous rocks and quartz in carbonate rocks. Spectrally, dyke displayed Al-OH absorption indicative of plagioclase and sericite, while metasomatic interactions introduced secondary calcite with additional CO32– absorption. Dolomitization is further distinguished by Mg-OH absorption features. A 3D-CNNs model combined with spectral normalization effectively mapped these transition lithologies, clearly revealing the geological processes imprinted in the outcrop. Most dykes show intensive metasomatic, with only core portions retain pure igneous signatures. Limestones are concentrated near dyke contacts, suggesting marble formation via contact metamorphism, while dolostone dominated the outcrop due to regional dolomitization. The mapping results provide a preliminary resource assessment indicating that igneous intrusion has reduced the economic value by approximately 80% compared to pure limestone. This integrated approach accurately represents gradational lithological boundaries, addressing the limitations of conventional survey methods.http://www.sciencedirect.com/science/article/pii/S1569843225003668Hyperspectral Remote SensingComplex Lithological Transitions MappingIgneous IntrusionCarbonate RocksAdvanced Machine LearningMetasomatism and Hydrothermal Alteration |
| spellingShingle | Huy Hoa Huynh Jaehyung Yu Lei Wang Trung Hieu Pham Jin-Young Lee Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective International Journal of Applied Earth Observations and Geoinformation Hyperspectral Remote Sensing Complex Lithological Transitions Mapping Igneous Intrusion Carbonate Rocks Advanced Machine Learning Metasomatism and Hydrothermal Alteration |
| title | Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective |
| title_full | Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective |
| title_fullStr | Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective |
| title_full_unstemmed | Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective |
| title_short | Detection of mineralogical and lithological transitions in igneous Intrusion-Limestone boundaries using close-range hyperspectral remote Sensing: A resource perspective |
| title_sort | detection of mineralogical and lithological transitions in igneous intrusion limestone boundaries using close range hyperspectral remote sensing a resource perspective |
| topic | Hyperspectral Remote Sensing Complex Lithological Transitions Mapping Igneous Intrusion Carbonate Rocks Advanced Machine Learning Metasomatism and Hydrothermal Alteration |
| url | http://www.sciencedirect.com/science/article/pii/S1569843225003668 |
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