利用Aster数据提取矿化蚀变异常——以新泰市石河庄硫铁矿为例

Extraction of Mineralized Alteration Anomalies from Aster Remote Sensing Data——Taking Shihezhuang Pyrite in Xintai City as an Example

以新泰市石河庄硫铁矿为例,在蚀变异常找矿的地质依据和蚀变异常提取的波谱依据的指导下,采用去干扰主分量门限化技术对ASTER遥感图像进行铝、镁羟基异常和铁染异常的蚀变信息提取,通过已知矿床与蚀变异常的关系分析,发现其提取结果与已知矿体、蚀变带吻合较好。然后结合已知矿床的成矿模式和充分考虑已知矿区的外围地段,圈定了1处成矿靶区,为找矿预测与评价工作提供了参考。

Taking Shihezhuang Pyrite in Xintai city as an example, based on ASTER satellite image data and major compo- nent analysis technology, this paper extracted the rion-stained and aluminum, magnesium hydroxyl anomaly alteration informa- tion, with the guidance of geologic basis for alteration anomalies prospecting and spectrum basis for remote sensing information extraction of alteration anomalies. By analyzing the relationship of known mineral deposit and alteration anomalies, the extrac- tion results compare well with the known ore-body,and alteration anomalies. One prospecting target area is delimited by metal- logenic model of known mineral deposits and known ore district surroundings. It offers reference to predication and evaluation for prospecting.