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Altered mineral mapping and characteristic analysis in Qianhongquan Area,Beishan,Gansu Province,based on hyperspectral data from the ZY-1 02D satellite
Received date: 2024-09-06
Revised date: 2025-03-24
Online published: 2026-06-03
Hyperspectral remote sensing (HRS) technology,with its high spectral resolution and extensive spectral coverage,demonstrates significant potential in geological prospecting. Focusing on the Qianhongquan gold deposit in the Beishan orogenic belt,Gansu Province,this study conducted altered mineral mapping and component analysis,using HRS data from the AHSI sensor on the ZY-1 02D satellite and the self-developed hyperspectral mineral mapping technique,GeoAHSI,revealing their spatial distribution characteristics. Besides,ground-based spectral measurements were conducted on typical profiles to validate the spectral data,thereby assessing the reliability of the hyperspectral mineral mapping results. The results indicate that the primary altered minerals in the Qianhongquan gold deposit and its surrounding rocks include sericites (low-aluminum,medium-aluminum,high-aluminum,and iron-rich muscovites),calcites,dolomites,epidotes,and chlorites. Their distribution is closely related to ductile shear zones,with the distribution of sericites,chlorites,and epidotes being particularly significant within these zones. This spatial correlation provides critical indicators for regional prospecting. Additionally,it was observed that the 2 200 nm absorption feature of sericites and the 2 250 nm absorption feature of chlorites exhibit marked enrichment in silicon (Si) and iron (Fe) around ore bodies,which is closely correlated to the chemical compositions of the minerals. By enhancing the identification of weak spectral features,this study successfully applied HRS technology to mineral identification and spatial distribution analysis. These findings provide a scientific basis for further exploration of the Qianhongquan gold deposit and offer valuable references and guidance for the application of HRS in similar deposits.
HE Haiyang , LI Shijie , QIN Haoyang , LIU Xiaoyu , WANG Siqi , SUN Xu . Altered mineral mapping and characteristic analysis in Qianhongquan Area,Beishan,Gansu Province,based on hyperspectral data from the ZY-1 02D satellite[J]. Remote Sensing for Natural Resources, 2025 , 37(5) : 195 -205 . DOI: 10.6046/zrzyyg.2024293
表2 USGS光谱库绢云母样本Tab.2 Muscovite samples from the USGS spectral library |
| 样本ID | 光谱仪 | wv2 200/μm | Al2O3质量百分比/% |
|---|---|---|---|
| GDS114 | BECK | 2.207 | 33.09 |
| GDS116 | BECK | 2.214 | 31.06 |
| GDS111 | BECK | 2.222 | 28.03 |
| GDS113 | NIC4 | 2.197 | 35.64 |
| GDS117 | NIC4 | 2.200 | 35.54 |
| GDS118 | BECK | 2.212 | 31.31 |
| GDS108 | NIC4 | 2.198 | 35.0 |
| GDS120 | NIC4 | 2.200 | 35.69 |
| GDS119 | BECK | 2.204 | 33.34 |
表3 USGS波谱库绿泥石样本Tab.3 Chlorite samples from the USGS spectral library |
| 样本ID | 矿物 | 光谱仪 | wv2 250/μm | MgO质量百分比/% | Fe2O3质量百分比/% |
|---|---|---|---|---|---|
| NMNH83369 | 镁硬绿泥石 | NIC4 | 2.246 | 33.9 | 3.76 |
| GDS159 | 硬绿泥石 | NIC4 | 2.247 | 34.7 | 1.16 |
| NMNH83369 | 镁硬绿泥石 | NIC4 | 2.247 | 33.9 | 3.76 |
| SMR-13.b | 富镁绿泥石 | BECK | 2.248 | 30.2 | 8.34 |
| SMR-13.a | 富镁绿泥石 | BECK | 2.249 | 30.2 | 8.34 |
| SMR-13.d | 富镁绿泥石 | NIC4 | 2.250 | 30.2 | 8.34 |
| SMR-13.c | 富镁绿泥石 | NIC4 | 2.250 | 30.2 | 8.34 |
| SMR-13.d | 富镁绿泥石 | BECK | 2.250 | 30.2 | 8.34 |
| SMR-13.a | 富镁绿泥石 | NIC4 | 2.250 | 30.2 | 8.34 |
| SMR-13.a | 富镁绿泥石 | NIC4 | 2.250 | 30.2 | 8.34 |
| GDS158 | 硬绿泥石 | ASDNG | 2.251 | 24.7 | 14.10 |
| SC-CCa-1.b | 含铁硬绿泥石 | BECK | 2.255 | 26.1 | 20.70 |
| GDS158 | 硬绿泥石 | BECK | 2.255 | 24.7 | 14.10 |
| SC-CCa-1.a | 含铁硬绿泥石 | NIC4 | 2.255 | 26.1 | 20.70 |
| SC-CCa-1.b | 含铁硬绿泥石 | NIC4 | 2.256 | 26.1 | 20.70 |
| GDS157 | 含铁硬绿泥石 | BECK | 2.258 | 16.6 | 25.30 |
| SMR-15.b | 鳞绿泥石 | BECK | 2.260 | 16.8 | 37.50 |
| SMR-15.a | 鳞绿泥石 | NIC4 | 2.260 | 16.8 | 37.50 |
| SMR-15.d | 鳞绿泥石 | NIC4 | 2.260 | 16.8 | 37.50 |
| SMR-15.b | 鳞绿泥石 | NIC4 | 2.261 | 16.8 | 37.50 |
| SMR-15.b | 鳞绿泥石 | NIC4 | 2.261 | 16.8 | 37.50 |
| SMR-15.c | 鳞绿泥石 | NIC4 | 2.261 | 16.8 | 37.50 |
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