Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China
The high-grade uranium deposits in the Xiemisitan area, northwestern China, are genetically associated with the faulting of felsic volcanic or sub-volcanic rocks. Ferric iron alteration indicates that oxidizing hydrothermal fluids percolated through the rocks. In this study, we measured the gamma-ra...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-10-01
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| Series: | Remote Sensing |
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| Online Access: | http://www.mdpi.com/2072-4292/7/10/13878 |
| _version_ | 1818939059007913984 |
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| author | Jun-Ting Qiu Chuan Zhang Xiao Hu |
| author_facet | Jun-Ting Qiu Chuan Zhang Xiao Hu |
| author_sort | Jun-Ting Qiu |
| collection | DOAJ |
| description | The high-grade uranium deposits in the Xiemisitan area, northwestern China, are genetically associated with the faulting of felsic volcanic or sub-volcanic rocks. Ferric iron alteration indicates that oxidizing hydrothermal fluids percolated through the rocks. In this study, we measured the gamma-ray intensities of rocks in the Xiemisitan area and we propose a hybrid method for the mapping of ferric iron alteration using concentration-area fractal modeling and spectral angle mapper. The method enables ferric iron alteration to be distinguished from potash-feldspar granitic rocks. The mapping results were integrated with structural data to assist with exploration for uranium in the study area. Using this approach, six prospective areas of mineralization were proposed. Of these areas, two anomalies with high gamma-ray intensities of 104 and 650 Uγ were identified and verified by field inspection. These observations suggest that Enhanced Thematic Mapper Plus images are a valuable tool that can improve the efficiency of uranium exploration. |
| first_indexed | 2024-12-20T06:17:43Z |
| format | Article |
| id | doaj.art-997c0aa52ee946cc9cc2af01e41b4788 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-20T06:17:43Z |
| publishDate | 2015-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-997c0aa52ee946cc9cc2af01e41b47882022-12-21T19:50:30ZengMDPI AGRemote Sensing2072-42922015-10-01710138781389410.3390/rs71013878rs71013878Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW ChinaJun-Ting Qiu0Chuan Zhang1Xiao Hu2National Key Laboratory of Science and Technology on Remote Sensing Information and Image Analysis, Beijing Research Institute of Uranium Geology, Beijing 100029, ChinaNational Key Laboratory of Science and Technology on Remote Sensing Information and Image Analysis, Beijing Research Institute of Uranium Geology, Beijing 100029, ChinaChengdu Center of Hydrogeology and Engineering Geology, Chengdu 610081, ChinaThe high-grade uranium deposits in the Xiemisitan area, northwestern China, are genetically associated with the faulting of felsic volcanic or sub-volcanic rocks. Ferric iron alteration indicates that oxidizing hydrothermal fluids percolated through the rocks. In this study, we measured the gamma-ray intensities of rocks in the Xiemisitan area and we propose a hybrid method for the mapping of ferric iron alteration using concentration-area fractal modeling and spectral angle mapper. The method enables ferric iron alteration to be distinguished from potash-feldspar granitic rocks. The mapping results were integrated with structural data to assist with exploration for uranium in the study area. Using this approach, six prospective areas of mineralization were proposed. Of these areas, two anomalies with high gamma-ray intensities of 104 and 650 Uγ were identified and verified by field inspection. These observations suggest that Enhanced Thematic Mapper Plus images are a valuable tool that can improve the efficiency of uranium exploration.http://www.mdpi.com/2072-4292/7/10/13878enhanced thematic mapper plusconcentration-area fractal modelingspectral angle mapperuranium explorationXiemisitan areaNorthwest China |
| spellingShingle | Jun-Ting Qiu Chuan Zhang Xiao Hu Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China Remote Sensing enhanced thematic mapper plus concentration-area fractal modeling spectral angle mapper uranium exploration Xiemisitan area Northwest China |
| title | Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China |
| title_full | Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China |
| title_fullStr | Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China |
| title_full_unstemmed | Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China |
| title_short | Integration of Concentration-Area Fractal Modeling and Spectral Angle Mapper for Ferric Iron Alteration Mapping and Uranium Exploration in the Xiemisitan Area, NW China |
| title_sort | integration of concentration area fractal modeling and spectral angle mapper for ferric iron alteration mapping and uranium exploration in the xiemisitan area nw china |
| topic | enhanced thematic mapper plus concentration-area fractal modeling spectral angle mapper uranium exploration Xiemisitan area Northwest China |
| url | http://www.mdpi.com/2072-4292/7/10/13878 |
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