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首页> 外文期刊>Geochemistry: exploration, environment, analysis >Dendrochemistry and soil clay geochemistry applied to exploration for deep U mineralization at the Halliday Lake Prospect, Athabasca Basin, Canada
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Dendrochemistry and soil clay geochemistry applied to exploration for deep U mineralization at the Halliday Lake Prospect, Athabasca Basin, Canada

机译：龙头化学与土壤粘土地球化学在加拿大Athabasca盆地的Halliday Lake ProSpect探索探索

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摘要

Drilling at the c. 750 m deep Halliday Lake prospect in the Athabasca Basin has identified features favourable for unconformity-related U mineralization such as sandstone enrichments in pathfinder elements, graphitic metapelite gneiss, sandstone and basement hosted faulting, hydrothermal alteration and sub-economic U mineralization. Soils, jack pine (Pinus banksiana) and black spruce (Picea mariana) tree cores were collected on a 250 m sampling grid to assess their effectiveness as exploration geochemical media for concealed mineralization. The < 2 mu m soil clay-size fractions comprise mixtures of quartz, chlorite, illite, kaolinite, and plagioclase with the plagioclase reflecting basement boulders transported in the Quaternary cover. Basement rocks in the till impart a geochemical signature enriched in K, Ba, Bi, Co, Cr, Cs, Cu, Li, Mn and Ni, complicating the interpretation of some pathfinder elements in the < 2 mu m soil clay-size fraction. Tree cores have Mo, Co, Cu and S enrichments in areas of thin overburden also associated with sandstone hosted hydrothermal alteration and pathfinder element enrichment. Radiogenic Pb isotope ratios in the < 2 mu m soil clay-size fraction are associated with drill holes hosting sub-economic U mineralization whereas barren drill holes are spatially associated with common Pb isotope ratios. Radiogenic tree core Pb isotope ratios are supportive of the < 2 mu m soil clay-size fraction Pb isotope ratios.
机译：钻孔在c。 Athabasca盆地的750米深海湖前景已经确定了有利于无关相关的U矿化的特点，如探测器元素，石墨法锭，砂岩和地下室托管故障，水热改变和亚经济U矿化。在250米的采样网格上收集了土壤，杰克松树（Pinus Banksiana）和黑云杉（Picea Mariana）树核心，以评估其作为隐藏矿化的勘探地球化学媒体的效果。 <2μm土壤粘土尺寸级分包括石英，亚氯酸盐，伊尔石，高岭土的混合物，具有普拉基酶反射在季覆盖中运输的基底燃烧器的Plagioclase。直到富有富含K，Ba，Bi，Co，Cr，Cs，Cu，Li，Mn和Ni的地球化学签名赋予富含K，Ba，Bi，Co，Cr，Cs，Cu，Li，Li，Mn和Ni，使其在<2μm土壤粘土尺寸级分中的一些裂口元件的解释。树核心有莫，CO，Cu和S浓缩，薄覆盖层也与砂岩载有水热改变和探测器元素富集相关。 <2μm土壤粘土尺寸级分中的辐射性Pb同位素比与托管子经济U矿化的钻孔相关，而贫瘠钻孔在空间上与普通的Pb同位素比率相关。辐射树核心Pb同位素比率是<2μm土壤粘土大小馏分Pb同位素比的支持性。

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