本文選題：諸廣巖體 + 遙感蝕變信息提取　； 參考：《鈾礦地質(zhì)》2015年03期

【摘要】：諸廣南部花崗巖型鈾礦田區(qū)內(nèi)與鈾礦化相關(guān)的赤鐵礦化、綠泥石化和水云母化蝕變發(fā)育,但區(qū)內(nèi)植被覆蓋度高,直接對遙感圖像進行鐵染、羥基蝕變信息提取易受植被等因素的干擾。為了去除植被、水體、陰影和第四系的影響或使它們的影響降低到最小程度,分別采用ETM+4/3波段比值的高值掩模去除植被、7/1波段比值的低值掩模去除水體和陰影、以及用第四系分布的矢量圖層掩模去除第四系的干擾。對去除干擾后的圖像,利用ETM+1、3、4、5波段進行主成分分析,分析認(rèn)為其第四主成分的高值為鐵染主分量信息;ETM+1、4、5、7波段主成分分析結(jié)果顯示其第四主成分為羥基主分量信息。將鐵染和羥基主分量信息分別經(jīng)過濾波處理和統(tǒng)計密度分割,獲取諸廣巖體南部鐵染和羥基蝕變異常的分布信息。
[Abstract]:The hematitization associated with uranium mineralization in the granitic uranium ore field in the southern part of the Guangdong Province is characterized by the development of green-mud fossilization and hydromica alteration, but the vegetation coverage in the area is high, and the remote sensing images are directly stained with iron. The extraction of hydroxyl alteration information is easily disturbed by vegetation and other factors. In order to remove or minimize the effects of vegetation, water body, shadow and Quaternary system, the high value mask of ETM 4 / 3 band ratio is used to remove the low value mask of 7 / 1 band ratio of vegetation to remove water body and shadow, respectively. And the Quaternary pattern mask is used to remove the Quaternary interference. After removing the interference, the principal component analysis (PCA) was carried out in the band of ETM _ (1) ~ (3) O _ (3) and (4) ~ (5). It was concluded that the high value of the fourth principal component was the principal component information of iron stain. The results of principal component analysis in the band of ETM _ (1) ~ (4) ~ (4) ~ (5) ~ (5) showed that the fourth principal component was hydroxyl principal component. The iron-stained and hydroxyl group principal component information are filtered and the statistical density is partitioned respectively to obtain the distribution information of iron-stained and hydroxyl alteration anomalies in the southern part of the Guang rock mass.
【作者單位】： 東華理工大學(xué)江西省數(shù)字國土重點實驗室核資源與環(huán)境教育部重點實驗室;
【分類號】：TP751

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