西澳大利亚州利用地下水进行金矿勘探

IF 1 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Geochemistry-Exploration Environment Analysis Pub Date : 2023-03-09 DOI:10.1144/geochem2022-066

N. Reid, C. Plet, R. Thorne, A. Hunt, J. Hille, R. Noble, D. Gray

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引用次数: 0

摘要

利用地下水地球化学勘探金矿化面临一些挑战。对于这种类型的矿化，最好的探路元素是Au本身。然而，包括Au和Ag在内的贵金属的分析技术具有相对较低的灵敏度，特别是对于微咸水到盐水。在分析之前，需要对中高盐度的水域进行稀释，从而导致Au浓度更低，更多样本低于检测阈值。在这里，我们介绍了通过使用活性炭小袋来添加预浓缩步骤的方法，该小袋从水样中吸附并浓缩感兴趣的贵金属。这种方法在北部伊尔加恩火山口的区域调查中以及在几个较小的案例研究中使用，以确定地下水地球化学在识别深度Au矿化方面的潜力。补充材料：https://doi.org/10.6084/m9.figshare.c.6454122

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Gold exploration using groundwater in Western Australia

The use of groundwater geochemistry to explore for Au mineralisation has faced some challenges. For this type of mineralisation, the best pathfinder element is Au itself. However, the analytical technique for precious metals including Au and Ag has a relatively low sensitivity, in particular for brackish to saline waters. Medium to high salinity waters need to be diluted before analyses, leading to even lower Au concentrations and more samples below detection thresholds. Here, we present methods where a pre-concentration step is added by using activated carbon sachets that adsorb and concentrate the precious metals of interest from the water sample. This approach was used during a regional survey in the Northern Yilgarn Craton, as well as on several smaller case studies, to determine the potential of groundwater geochemistry in identifying Au mineralisation at depth. Supplementary material: https://doi.org/10.6084/m9.figshare.c.6454122

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来源期刊

Geochemistry-Exploration Environment Analysis 地学-地球化学与地球物理

CiteScore

3.60

自引率

16.70%

发文量

审稿时长

1 months

期刊介绍： Geochemistry: Exploration, Environment, Analysis (GEEA) is a co-owned journal of the Geological Society of London and the Association of Applied Geochemists (AAG). GEEA focuses on mineral exploration using geochemistry; related fields also covered include geoanalysis, the development of methods and techniques used to analyse geochemical materials such as rocks, soils, sediments, waters and vegetation, and environmental issues associated with mining and source apportionment. GEEA is well-known for its thematic sets on hot topics and regularly publishes papers from the biennial International Applied Geochemistry Symposium (IAGS). Papers that seek to integrate geological, geochemical and geophysical methods of exploration are particularly welcome, as are those that concern geochemical mapping and those that comprise case histories. Given the many links between exploration and environmental geochemistry, the journal encourages the exchange of concepts and data; in particular, to differentiate various sources of elements. GEEA publishes research articles; discussion papers; book reviews; editorial content and thematic sets.