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The stone attached with copper tape before the analysis View original picture , opens in new tab/window

Father and son with gold fever

Published: 2 December 2013

Emil Hagenrud, aged 13, found a mysterious stone near the water just outside Luleå. He suspected that it might contain gold and a first analysis was made by the company GoldAdam. They used a simpler approach by brushing nitric acid over the surface and according to their expert the stone contained gold. In order to get this confirmed father and son Hagenrud visited The Department of Geosciences and Environmental Engineering at Luleå University of Technology.

- We met both professors, researchers and graduate students from Sweden, England and Germany. Some had the firm belief that it was gold, some were more hesitant. Then we met Glenn Bark, who promised to help us with a real analysis, said Erik Hagenrud.

LTU Press photo - Extreme High Resolution Scanning Electron Microscope -
Extreme High Resolution Scanning Electron Microscope

Glenn Bark was one of the more reluctant gold discovery wise from experience. But he sued the result of an analysis with an Extreme High Resolution Scanning Electron Microscope. With the help of this tool you can create a beam of electrons that sweeps across the surface of the object to be analyzed. This beam then generates an image of the surface of the object while the analysis process calculates the precious metals such as the stone contains.

Guldfeber-Lulea-tekniska-universitet-LTU.jpg
Emil and Erik Hagenrud awaiting the analysis answer

It was with eager anticipation we awaited the test response which, however, was a bit of a disappointment. What you thought might be gold turned out to be pure copper. Now it is quite unusual to find pure copper in this way and on that account may be well put the uncertainty wthe different and independent experts showed when analyzing this stone on a visual inspection.

- It was certainly exciting and interesting, said Emil, who also got some images from the analysis to bring home.

The researchers from the Department of Geosciences and Environmental Engineering usually don´t help out with this type of advanced analysis when citizens show up with different minerals, since both equipment and labor costs a lot.

- We made an exception today, says Glenn Bark, this was a special case and when our experts were in disagreement and we thought it was best to go to the root of the matter. See pictures from the analysis here.

Contact

In addition to research work Glenn Bark as a lecturer in the degree program Master Programme in Natural Resources Engineering at Luleå University of Technology.

Natural Resources Engineering

Free lecture with Glenn Bark

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