GF-5高光谱数据在铀矿勘查中的应用

doi:10.6046/zrzyyg.2022250

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摘要

高分五号(GF-5)卫星自2018年发射以来,利用该型卫星AHSI高光谱数据开展铀矿勘查应用的研究少见报道。为此,以内蒙古卫境地区为研究区,基于GF-5 AHSI数据,采用光谱沙漏技术提取了针铁矿和低铝、中铝及高铝绢云母蚀变异常; 采用主成分变换(principal component analysis,PCA)及PCI Geomatica软件中的LINE模型,自动提取了研究区线性构造,制作了研究区线性构造密度分布图; 最后结合ArcGIS软件,通过对各证据层的整合,制作了研究区铀成矿潜力图。结果表明: 所采用的蚀变信息、线性构造提取以及多证据层整合方法可行,获得的铀成矿潜力图可靠性较高。根据研究结果结合地质资料,圈定了1处铀矿预测区,为该区后续铀矿勘查工作提供了指导,同时也将为GF-5 AHSI数据在地质领域的应用提供参考。

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	张元涛
	潘蔚
	余长发

关键词 ：高分五号, 高光谱, 蚀变信息, 线性构造, 权重叠加, 铀矿

Abstract：

However, since GF-5 launch in 2018, few studies regarding the application of GF-5 AHSI data for uranium deposit exploration have been reported. In this study, with the Weijing area of Inner Mongolia as the study area, the spectral hourglass technology was applied to extract alteration anomalies of goethite and low-, medium-, and high-aluminum sericite from corresponding GF-5 AHSI data. Then, the principal component analysis (PCA) and the LINE module in PCI Geomatica software were employed for the automatic extraction of linear structures in the study area, with a linear structure density map created. Finally, a uranium mineralization potential map of the study area was generated by integrating all proof layers based on the ArcGIS software. The results indicate that the extraction of alteration information and linear structures, and the integration of multiple proof layers are feasible, and the obtained uranium mineralization potential map exhibits high reliability. One uranium deposit prediction zone was identified based on the study results and geological data. The study results will guide the subsequent uranium deposit exploration in the study area while providing a reference for the geological application of GF-5 AHSI data.

Key words： GF-5 hyperspectrum alteration information linear structure weighted overlay uranium deposit

收稿日期: 2022-06-16 出版日期: 2023-12-21

ZTFLH:

TP79

基金资助:中国核工业集团公司集中研发项目“第四代铀矿勘查关键技术研究与示范(第一阶段)”(中核科发[2021]143号);国防科技工业局高分专项项目“高分数据(民用部分)在铀资源勘查核查应用技术”(55-Y20A12-9001-16/17)

作者简介: 张元涛(1991-),男,博士研究生,主要研究方向为地学目标识别。Email: 809316163@qq.com。

引用本文:

张元涛, 潘蔚, 余长发. GF-5高光谱数据在铀矿勘查中的应用[J]. 自然资源遥感, 2023, 35(4): 61-70.
ZHANG Yuantao, PAN Wei, YU Changfa. Application of GF-5 hyperspectral data in uranium deposit exploration. Remote Sensing for Natural Resources, 2023, 35(4): 61-70.

链接本文:

https://www.gtzyyg.com/CN/10.6046/zrzyyg.2022250 或 https://www.gtzyyg.com/CN/Y2023/V35/I4/61

Fig.1 研究区地质图略图(据核工业208大队2015年资料改编)
1. 第四系; 2. 玄武岩; 3. 新近系; 4. 白垩系; 5. 侏罗系满克头鄂博组二岩段; 6. 大石寨组四岩组; 7. 大石寨组三岩组; 8. 大石寨组二岩组; 9. 大石寨组一岩组; 10. 青白口系; 11. 早白垩世花岗岩; 12. 晚侏罗世花岗岩; 13. 早侏罗世二长花岗岩; 14. 早侏罗世花岗岩; 15. 晚二叠世二长花岗岩; 16. 晚二叠世花岗岩; 17. 早二叠世闪长岩; 18. 志留纪花岗岩; 19. 断层(虚线为推测断层); 20. 野外验证点

Tab.1 GF-5 AHSI图像的主要参数

Fig.2 波段276原始影像与条纹修复后影像

Fig.3 研究流程图

Fig.4 端元波谱及标准光谱

Tab.2 LINE模块不同参数及研究采用值

Fig.5 蚀变矿物空间分布
1. Q第四系; 2. N新近系; 3. K₂白垩系; 4. P₁ds⁴大石寨组四岩组; 5. P₁ds²大石寨组二岩组; 6. Qn青白口系; 7. K₁γ早白垩世花岗岩; 8. J₁ηγ早侏罗世二长花岗岩; 9. J₁γ早侏罗世花岗岩; 10. P₂ηγ晚二叠世二长花岗岩

Fig.6 线性构造空间分布
1. Q第四系; 2. N新近系; 3. K₂白垩系; 4. P₁ds⁴大石寨组四岩组; 5. P₁ds²大石寨组二岩组; 6. Qn青白口系; 7. K₁γ早白垩世花岗岩; 8. J₁ηγ早侏罗世二长花岗岩; 9. J₁γ早侏罗世花岗岩; 10. P₂ηγ晚二叠世二长花岗岩

Fig.7 线性构造玫瑰花图

Tab.3 各证据层权重值及类别划分

Fig.8 各证据层分类结果及铀成矿潜力图

Fig.9 卫境地区野外查证照片

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