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首页> 外文期刊>Geochemistry: exploration, environment, analysis >Regional scale hydrogeochemical mapping of the northern Yilgarn Craton, Western Australia: a new technology for exploration in arid Australia
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Regional scale hydrogeochemical mapping of the northern Yilgarn Craton, Western Australia: a new technology for exploration in arid Australia

机译：西澳大利亚州北部伊尔加恩克拉顿的区域规模水文地球化学测绘：干旱澳大利亚的一项新勘探技术

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摘要

The northern Yilgarn Craton, with an extensive mineral exploration history and relatively fresh and neutral groundwaters, was selected to test the utility of regional hydrogeochemical mapping in Australia. The assembled data of 2509 groundwater samples (generally at 4-8 km spacing) are relatively unbiased, allowing robust statistical analysis such as testing sample types (flowing v. 'stagnant'), contamination, and lithological controls on groundwater characteristics. Lithological indicators were developed to map underlying bedrock through cover. Areas with discrepancies between groundwater results and previous geological mapping were identified. Where these are areas previously discounted as prospective for mineral commodities, they may now be re-considered on this basis. Even in well explored parts of this region, this study identified new areas which may have prospective rocks overlain with a thin (<50 m) veneer of granitic material. A large background data set was produced that has significant benefits for lithological discrimination, mineral exploration, guiding human and livestock drinking water supplies and environmental management (e.g. mine closure).
机译：选择了具有丰富矿物勘探历史和相对淡水和中性地下水的北部伊尔加恩克拉通地区，以测试澳大利亚区域水文地球化学测绘的实用性。 2509个地下水样品（通常以4-8 km的间隔）的组合数据是相对无偏的，从而可以进行可靠的统计分析，例如测试样品类型（流动与“停滞”），污染以及对地下水特征的岩性控制。开发了岩性指示剂以通过覆盖层绘制下伏的基岩。确定了地下水结果与先前地质图之间存在差异的区域。如果这些地区以前曾被打折为矿产商品的前景，现在可以在此基础上重新考虑它们。即使在该地区的勘探良好的地区，这项研究也发现了新的地区，这些地区可能覆盖有潜在的岩石，上面铺有薄薄的（<50 m）花岗岩材料薄板。产生了大量的背景数据，这些数据对岩性识别，矿物勘探，指导人类和牲畜饮用水供应以及环境管理（例如矿山关闭）具有重大益处。

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