多尺度 (微观到遥感) 金矿-矿大理石的初步勘探:来自埃及努比亚盾牌的案例研究
Ali Shebl1,2, Mohamed Hamdy3
1Department of Mineralogy and Geology, University of Debrecen, Debrecen, 4032, Hungary. ali.shebl@science.tanta.edu.eg.
Scientific reports
|June 6, 2023
概括
这项研究绘制了埃及黄金和含大理石的地图.
科学领域:
- 经济地质学 地质学
- 遥感 遥感 遥感 遥感
- 机器学习 机器学习
背景情况:
- 埃及努比亚盾牌中的黄金和金大理石在经济上具有重要意义,但由于具有挑战性的地形,研究不足.
- 对于大理石识别的传统现场工作是耗时且昂贵的.
- 遥感和机器学习为地质特征识别提供了有效的替代方案.
研究的目的:
- 通过遥感和机器学习,在巴拉米亚-达格巴格地区划分金矿-矿大理石的分布.
- 为了创建这些大理石和主要岩石单元的主题地图.
- 为这些矿产化区域开发初步勘探模型.
主要方法:
- 在Sentinel 2的遥感数据上应用支持矢量机 (SVM) 算法.
- 整合ALOS PRISM (2.5米) 全面利的Sentinel 2数据,以提高大理石的分辨率.
- 现场工作,岩石调查,X射线衍射 (XRD),背散电子图像 (BSEI) 和能量散射X射线光谱 (EDX) 进行验证.
主要成果:
- 制作了一个以超过90%的准确度划分金矿-金矿大理石和岩石单位的专题地图.
- 发现大理石在空间上与ophiolitic蛇形岩石岩石有关.
- 实地和实验室分析证实了新的黄金 (Au) 和 (U) 含量区域,矿化时间各不相同 (syn- to post-metamorphism).
结论:
- 遥感和机器学习有效地绘制了Barramiya-Daghbagh地区的金矿-矿大理石.
- 这些发现支持了这些大理石在新新生代海洋石化层中的起源.
- 建议在Barramiya-Daghbagh地区和类似的地质环境中进行进一步的勘探.
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