不同环境条件下金矿遥感异常提取研究

金矿遥感异常在金矿资源综合评价与定位预测中发挥着重要作用。根据蚀变岩在可见光和近红外光谱区的诊断性波谱特征,在中等植被覆盖区利用各种方法手段压抑或排除环境因素的干扰可以提取出金矿蚀变信息;根据金的植被遥感异常理论,在植被覆盖区可以通过提取异常植被信息的方法来获得与金矿找矿有关的信息。1,运用矿物指数乘性因子法对四川省九寨沟县草地金矿区及外围进行金矿蚀变信息提取,所提取的金矿蚀变信息与该区解译构造预测结果对比,二者吻合度较高。2.对比研究了黑龙江呼玛地区与金矿有关的植被遥感异常特征,提取结果表明:这种异常主要分布在以兴隆沟为中心的大型环块构造区和沿黑龙江西岸新街基一呼吗一线北西向构造带内。

Study on Gold Remote Sensing Anomaly Extraction under Different Environmental Conditions

Remote sensing anomaly of gold plays an important role in the comprehensive evaluation and orientation prediction of gold deposit. According to the diagnostic spectral character of altered rocks in visible and near-infrared spectra, gold mineralized alteration information could be extracted by all kinds of ways to inhibit or eliminate the disturbance of environment in moderately vegetation covered area; based on the theory of vegetation remote sensing anomaly of gold, the relative information of gold prospecting could be obtained by extracting abnormal vegetation information in vegetation covered area. 1. Using mineral index multiplying factor method (MIMFM), the gold alteration information was extracted in Caodi gold deposit area and periphery, Jiuzhaigou County, Sichuan Province. Comparing between the results of gold alteration information extraction and that of interpretation structural prediction, the two coincided with each other. 2.The vegetation remote sensing anomalies were researched and extracted in Huma district, Heilongjiang Province, and the results proved that they densely distributed in Xinglonggou large ring structure area, and in Xinjieji-Huma NW-trending fault belt along the west bank of Heilongjiang river.