Abstract

This work is aimed at the practical application of satellite imagery data for the selection of promising areas during geological exploration work in conditions of medium-low mountainous terrain and a sharply continental climate. The processing results and analysis of WorldView-2 data within the Talmanskaya area are presented in order to identify zones of hydrothermal-metasomatic changes in rocks that are promising for identifying of gold-polymetallic mineralization. The choice of the study area is due to sufficient geological knowledge and the absence of man-made formations that affect the result of processing satellite imagery materials. To increase the spectral information content of the WorldView-2 data, the spectral channel ratio method was used, as a result of which a pseudocolor RGB composite was created that displays the spectral characteristics of objects on the Earth’s day surface, in particular, minerals of the oxide/hydroxide group containing transition iron ions (Fe³⁺ and Fe³⁺/Fe²⁺). A comparison of satellite data processing results along with geological information made it possible to identify spectral anomalies as indicators of the presence of near-ore changes, which are an important search criterion for hydrothermal deposits.

中文翻译：

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使用塔尔曼遗址的 WorldView-2 数据识别热液蚀变岩区域（俄罗斯外贝加尔湖东南部塔尔曼斯卡亚地区）

摘要

本工作旨在在中低山地形和强烈大陆性气候条件下的地质勘探工作中，利用卫星影像数据来选择有希望的地区。塔尔曼斯卡亚地区 WorldView-2 数据的处理结果和分析旨在确定岩石中的热液交代变化区域，这些区域有望用于识别金多金属矿化。选择研究区域是因为有足够的地质知识，并且不存在影响卫星图像材料处理结果的人造地层。为了增加WorldView-2数据的光谱信息含量，采用了光谱通道比方法，从而创建了伪彩色RGB合成图，显示地球日表面物体的光谱特征，特别是矿物的光谱特征。含有过渡铁离子(Fe ³⁺和Fe ³⁺ /Fe ²⁺ )的氧化物/氢氧化物基团。通过将卫星数据处理结果与地质信息进行比较，可以识别光谱异常作为近矿变化存在的指标，这是热液矿床的重要搜索标准。