青海赛多浦岗日地区遥感蚀变信息提取及成矿预测
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摘要
赛多浦岗日地区位于青海沱沱河长江源头格拉丹东雪峰东侧通天河上游一带,积雪和第四纪覆盖较厚,冬长夏短,交通不畅,不利于地质找矿工作的开展。利用ETM+遥感影像对研究区进行构造解译,羟基和铁染蚀变信息提取,并结合区域地质和物化探异常信息,圈定5处找矿靶区,并发现蚀变异常分布于侏罗纪雀莫错组火山岩与砂岩地层之中,局部地区异常与侵入体及构造线分布关系密切。在景日强玛异常区经地质工作,发现景日强玛铅银多金属矿点,取得了较好的应用效果。
Saiduopugangri area is located in the upper reaches of Tong Tian River on the east side of snow peak of Guerra Danon in the source of the Yangtze River in Qinghai. In this place, snow cover and quaternary period are relatively thick, with long winter and short summer and poor traffic, which is not conducive to geological prospecting. Using ETM+ remote sensing image to interpret the structure, we will extract the information of hydroxyl and iron corrosion in combining with regional geological and geophysical anomaly information. We have delineated five prospecting target areas and found that the alteration anomalies are distributed in volcanic rocks and sandstone stratum in Jurassic Period of Pasmol group. Local anomalies are related to intrusive bodies and structural lines. Through geological work in Jingriqiangma anomaly area, Jingriqiangma Pb-Ag polymetallic ore spot was found in good application effect.
Saiduopugangri area is located in the upper reaches of Tong Tian River on the east side of snow peak of Guerra Danon in the source of the Yangtze River in Qinghai. In this place, snow cover and quaternary period are relatively thick, with long winter and short summer and poor traffic, which is not conducive to geological prospecting. Using ETM+ remote sensing image to interpret the structure, we will extract the information of hydroxyl and iron corrosion in combining with regional geological and geophysical anomaly information. We have delineated five prospecting target areas and found that the alteration anomalies are distributed in volcanic rocks and sandstone stratum in Jurassic Period of Pasmol group. Local anomalies are related to intrusive bodies and structural lines. Through geological work in Jingriqiangma anomaly area, Jingriqiangma Pb-Ag polymetallic ore spot was found in good application effect.
引文
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[2] 龙晓君,何正伟,刘岩松,等.西藏羌多地区遥感蚀变与构造信息提取及成矿预测[J].国土资源遥感,2010(2):63-72.
[3] 陈建平,王倩,董庆吉,等.青海沱沱河地区遥感蚀变信息提取[J].中国地质大学学报,2009,34(2):314-318.
[4] 王贵仁,宋玉财,邹公明,等.青海南部茶曲怕查Pb、Zn矿床的勘查历史、现状与下一步找矿方向[J].岩石矿物学杂志,2012,31(1):79-90.
[5] 程知言,赵培松.云南播卡金矿遥感蚀变信息提取及成矿预测[J].国土资源遥感,2011(2):135-140.
[6] 何国金,,胡德永,陈志军,等.从TM图像中直接提取金矿化信息[J].遥感技术与应用,1995,10(3):51-54.
[7] 张玉君,曾朝铭,陈微.ETM+中蚀变遥感异常提取方法研究与应用[J].国土资源遥感,2003(2):44-49.
[8] 施炜,刘建民,王润生.内蒙古东部喀喇沁旗地区金矿围岩蚀变遥感信息提取及成矿预测[J].地球学报,2007,28(3):291-298.
[9] 杨金中,方洪宾,张玉君,等.中国西部重要成矿带遥感找矿异常提取的方法研究[J].国土资源遥感,2003(3):50-53.