西昆仑老并-赞坎矿集区铁矿成矿条件遥感研究
Remote Sensing Study of Metallogenic Condition in West Kunlun Laobing-Zankan Ore Concentration Area
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摘要: 通过Aster图像的遥感矿化蚀变信息提取和Worldview-Ⅱ图像的遥感解译,总结适合高寒、高海拔地区沉积变质型铁矿的遥感技术方法。基于矿集区铁矿成矿背景分析,针对Aster、Worldview-Ⅱ图像特点和铁矿矿化主要类型,提出以铁染异常为主的遥感矿化蚀变信息提取的技术方法,并对其可靠性进行评价;充分利用Worldview-Ⅱ高分辨率图像的优势,解译成矿作用的地层岩性、构造、侵入岩,特别是矿体、矿化带的解译,较之以往图像更为明显;通过成控矿条件遥感分析,建立铁矿遥感找矿模型。圈定矿集区除已知矿床外的铁矿矿化带4处,部分经野外验证和已知矿床的对比分析是可靠的。通过对老并-赞坎矿集区铁矿成矿条件遥感研究,确定老并赞坎矿集区具有良好的找矿前景。Abstract: This paper summarized remote sensing technology method suitable for the iron ore of sedimentary metamorphic type in arctic-alpine high altitude localities through mineralized alteration information extraction of remote sensing from Aster image and remote sensing interpretation from Worldview-Ⅱ image. Based on the background analysis of iron ore mineralization in the ore concentration area, and in view of Aster and Worldview-Ⅱimage features and major types of iron ore mineralization, the technology and method for mineralized alteration information extraction of remote sensing mainly focusing on iron stained anomaly is put forward. Meanwhile, its reliability is analyzed. The author made full use of the advantages of the high-resolution images from Worldview-Ⅱ and interpreted the metallogenesis including lithology, structure, intrusive rock, particularly the ore body and mineralized zone, which are much clearer than previous images. Prospecting model of iron ore remote sensing is set up through remote sensing analysis of ore-controlling conditions. Four iron ore mineralization belts except the known iron ore deposit are delineated. The comparison analysis is reliable between part of the field confirmation and the known mineral deposit. It is concluded that Laobing-Zankan ore concentration area boasts good prospecting potential through the remote sensing study of iron ore minerogenetic condition in the Laobing-Zankan ore concentration area.
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