| 西藏冲江-厅宫斑岩型铜矿区遥感蚀变信息提取与找矿预测 |
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| 引用本文： | 汪子义.西藏冲江-厅宫斑岩型铜矿区遥感蚀变信息提取与找矿预测[J].地质与勘探,2016,52(6):1129-1137. |
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| 作者姓名： | 汪子义 |
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| 作者单位： | 1. 成都理工大学地球科学学院,四川成都,610059;2. 成都理工大学地球科学学院,四川成都610059;地学空间信息技术国土资源部重点实验室,四川成都610059;成都理工大学工程技术学院,四川乐山 614000 |
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| 基金项目： | 国家自然科学基金“西藏典型斑岩型铜矿床遥感蚀变信息重现性机理研究”（编号：41202233）资助 |
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| 摘 要： | 西藏尼木县冲江和厅宫矿床是典型的斑岩型铜矿床,围岩蚀变强烈、类型丰富。对陆地卫星运行陆地成像仪(Operational Land Imager,OLI)光谱数据二维散点图做了结构分析,发现在提取铁染蚀变信息时,若选用OLI2和OLI4波段,则没有干扰端元;提取羟基蚀变信息时,选用OLI6和OLI7波段,干扰端元只有植被;剔除干扰端元之后,用主成分分析方法提取了该地区的围岩蚀变信息。最后,结合该研究区遥感蚀变信息、控矿和成矿地质特征,圈定了11个找矿靶区。
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| 关 键 词： | 遥感蚀变信息 斑岩型铜矿 OLI 二维散点图 找矿预测 |
| 收稿时间： | 2016/5/26 0:00:00 |
| 修稿时间： | 2016/10/30 0:00:00 |
Extraction of remote sensing alteration information and prospecting prediction of Chongjiang and Tinggong porphyry copper deposits in Tibet |
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| Wang Zi-yi.Extraction of remote sensing alteration information and prospecting prediction of Chongjiang and Tinggong porphyry copper deposits in Tibet[J].Geology and Prospecting,2016,52(6):1129-1137. |
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| Authors: | Wang Zi-yi |
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| Institution: | College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan; Key Laboratory of Geoscience Spatial Information Technology, Ministry of Land and Resources of the P.R. China, Chengdu , Sichuan; The Engineering& Technical College of Chengdu University of Technology, Leshan ,Sichuan; Institude of Mountain Hazards and Environment, CAS, Chengdu, Sichuan |
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| Abstract: | The Chongjiang and Tinggong deposits are typical porphyry copper mines in Nyêmo county of Tibet. Their country rocks have been altered intensively and have various types. This work has analyzed the two-dimensional scatter diagram of spectra of this area, which are from Operational Land Imager of Landsat. It was noted that when extracting the information of ferric alteration, choosing OLI2 and OLI4 bands has no interference endmember. And when extracting the information of hydroxyl alteration, choosing OLI6 and OLI7 band has only the vegetation interference as the endmember. After elimination of the interference endmember, the principal component analysis method was used to extract the alteration information of country rocks in this region. Finally, combining the remote sensing alteration information and ore-controlling and mineralization characteristics of these two deposits, this work has delineated eleven targets for further prospecting. |
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| Keywords: | remote sensing alteration porphyry copper deposit OLI two-dimensional scatter diagram prospecting prediction |
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