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首页> 外文期刊>International journal of applied earth observation and geoinformation >Large-scale mapping of iron oxide and hydroxide minerals of Zefreh porphyry copper deposit, using Worldview-3 VNIR data in the Northeastern Isfahan, Iran
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Large-scale mapping of iron oxide and hydroxide minerals of Zefreh porphyry copper deposit, using Worldview-3 VNIR data in the Northeastern Isfahan, Iran

机译：Zefreh斑岩铜矿氧化铁和氢氧化物矿物的大规模映射，在伊朗东北北部的世界观 - 3 VNIR数据

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摘要

Discrimination of iron oxide and hydroxide mineral assemblages is a key factor in porphyry copper exploration. This paper investigates the ability of the Worldview-3 VNIR data in mapping iron oxide / hydroxide minerals associated with the porphyry copper mineralization. The study area is situated in the central part of the Urumieh-Dokhtar magmatic arc, northeastern Isfahan, Iran, which hosts a number of important porphyry copper deposits. The copper mineralization is related to the porphyry intrusive complex that ranges in composition from diorite to granodiorite. Bands 2,3,4,5, and 8 of this satellite were used to enhance the pixels containing target minerals and to mask the effects of vegetation on these pixels. The best results in terms of mapping and discriminating target materials were acquired by the band math and the matched filtering (MF) methods. The MF output results enhanced pixels with the highest fractions of the target minerals. The field investigations, X-ray diffraction (XRD) analysis, and microscopic studies showed that the distribution pattern of target minerals correspond well to ground criteria and gossan caps associated with the porphyry copper mineralization. It was concluded that Worldview-3 has the efficient spectral bands in VNIR region, which could be proposed for the iron oxide / hydroxide mineral mapping.
机译：氧化铁和氢氧化物矿物组合的辨别是斑岩铜勘探的关键因素。本文调查了WorldView-3 VNIR数据在绘制氧化铁/氢氧化物矿物中与斑岩铜矿化相关的氧化铁/氢氧化物矿物质的能力。该研究区位于乌鲁木夫岩石岩石岩石，伊朗东北部，伊朗东北部的中央部分，举办了许多重要的斑岩铜矿矿床。铜矿化与斑岩侵入性复合物有关，该复合物在柴油机中的组成中的范围。这种卫星的带2,3,4,5和8和8用于增强含有目标矿物的像素，并掩盖植被对这些像素的影响。通过频段数学和匹配的滤波（MF）方法获得映射和鉴别目标材料方面的最佳结果。 MF输出结果增强了目标矿物的最高分数的像素。现场研究，X射线衍射（XRD）分析和微观研究表明，目标矿物的分布模式对应于与斑岩铜矿化相关的地标准和甘达帽。得出结论，WorldView-3具有VNIR区域中的有效光谱带，可以提出用于氧化铁/氢氧化物矿物测绘。

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