| 光谱学与光谱分析 |
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| Study on the Geochemical Anomalies Identification of REE Based on HJ-1A-HSI |
| CHEN Yong-gan1,2, WANG Mei-juan1,2, LI Peng1,2 |
1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
2. Institute of Gold Geology, Chinese Armed Police Force, Langfang 065000, China |
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Abstract The characteristic spectral bands of REE do not vary with the occurrence state, cannot be used to identify mineral species, but can prove the existence of its own. Here we report the spectrum characteristics of REE and their compounds by remote sensing wave bandfrom visible light-near infrared, with the quantitative relationship between the contents of REE and absorption index of characteristic spectral bands. The experimental study was carried out in Bayan Obo area, Inner Mongolia. Spectrums and Nd contents of typical rock and ore samples were gathered and analyzed. There is positive correlation between the Nd content, the absorption depth and absorption index of different spectrum characteristics (correlation coefficient >0.778). Moreover, the correlation between absorption index of 726~772 nm band and Nd content is the best, at 0.937. As mentioned above, the quantitative model and the inversion information remote sensing geochemical anomaly of Nd were built by the band of HJ-1A-HIS hyperspectral remote sensing data. Our results consistent with 1∶200 000 stream sediment geochemical anomalies of Nd. The model provides a new means for rapid extract regional geochemical anomalies of REE.
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Received: 2014-06-21
Accepted: 2014-10-28
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Corresponding Authors:
CHEN Yong-gan
E-mail: cyg49711@sohu.com
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