新疆白杨河铀铍矿区航空高光谱矿物填图及蚀变特征分析

发布时间：2018-06-30 06:13

本文选题：高光谱遥感 + 蚀变　；参考：《国土资源遥感》2017年02期

【摘要】：以新疆白杨河铀铍矿区为研究区,通过建立航空高光谱数据CASI/SASI矿物填图处理流程,运用混合调制匹配滤波技术实现了多种蚀变矿物的填图。填图结果的野外验证表明,3种绢云母亚类的准确性高于85%,其他各类矿物的准确性高于90%。叠加研究区铀矿点资料,发现白杨河矿区赤铁矿化和高铝绢云母的空间分布特征与铀矿点分布高度相关,主要位于杨庄岩体与外围火山岩的北接触带附近,呈明显分带性。并且,高、中、低铝绢云母的空间分布指示矿床北部和南部的热液活动温度可能存在差异,区域上存在多期热液活动作用。这为矿区外围找矿预测和区域地质成因研究提供了参考和依据。
[Abstract]:Taking Baiyanghe uranium beryllium mining area in Xinjiang as the study area, by establishing the CASI / SASI mineral mapping process of aviation hyperspectral data, the mixed modulation matched filtering technique is used to map many altered minerals. Field verification of the mapping results showed that the accuracy of the three sericite subclasses was higher than that of the other minerals, and the accuracy of the other minerals was higher than that of the other minerals. It is found that the spatial distribution characteristics of hematitization and high alumina sericite in Baiyanhe ore area are highly related to the distribution of uranium ore points, mainly located near the northern contact zone between the Yangzhuang rock mass and the surrounding volcanic rocks, which shows obvious zonation. Moreover, the spatial distribution of high, middle and low aluminum sericite indicates that there may be differences in hydrothermal activity temperatures between the northern and southern parts of the deposit, and there are multiple hydrothermal activities in the region. This provides a reference and basis for the prediction of ore prospecting in the periphery of the mining area and the study of the regional geological origin.
【作者单位】：核工业北京地质研究院遥感信息与图像分析技术国家级重点实验室;中国地质大学(北京)地球科学与资源学院;
【基金】：中核集团优先发展技术项目“铀及伴生元素矿产勘查高分辨率遥感评价技术研究”(编号:中核科发[2010]269号)资助
【分类号】：P627;TP751

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