01/15/2020

Science Blog: Studying the graphitization temperature and degree of graphite crystallinity with Raman spectroscopy

Text:
Thair Al-Ani, Senior Scientist
Akseli Torppa, Research Scientist

Introduction Previous studies have demonstrated that Raman spectroscopy is an excellent tool for studying the degree of graphitization of carbonaceous material (CM), a method that in the case of metamorphic processes is independent of pressure but strongly dependent on temperature. Recently, natural graphite has come to be considered as a promising anode material for lithium […]

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12/04/2019

Science Blog: Using the 50 Hz EM method to locate conductive mineralizations in electro-magnetic well-logging

Text:
Arto Korpisalo, Geophysicist
Esa Pohjolainen, Senior Specialist

The two-year Dynamic Control of Underground Mining Operations project (DynaMine) was carried out in 2014-2015. In the Green Mining project, VTT Technical Research Centre of Finland, Aalto University and the Geological Survey of Finland (GTK) participated in research cooperation with mining companies, with the goal of optimising extraction planning and mine safety. As part of […]

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11/04/2019

Science Blog: Mineral prospectivity modelling and virtual geologists

Text:
Johanna Torppa, Senior Scientist

The development and use of automated computational approaches to solve geological problems is raising concerns among geologists about the reliability of the computational results. There is currently a lot of talk about machine learning and artificial intelligence, which sounds fancy to some people and terrifying to others. Can a computer program mimic the reasoning of […]

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10/07/2019

Science Blog: Do you get too much arsenic from your diet?

Text:
Kirsti Loukola-Ruskeeniemi, Professor, Senior Scientist

In the old days, the Finns enjoyed food grown in their own village fields and slaked their thirst with water from a spring or from a well in their yard. Exported goods such as rice were expensive and few had heard about shrimps or other exotic foods. Now the Finnish diet contains a vast range […]

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09/06/2019

Science Blog: Acid rock drainage prediction by SEM mineralogy

Text:
Teemu Karlsson, Geologist

GTK has a long history in mining environmental investigation. A recently published study (Karlsson et al. 2018) examined the use of SEM mineralogy in acid rock drainage (ARD) prediction. The results were promising and indicate that mineralogical calculation can be an efficient tool in mine drainage quality assessment. ARD with high concentrations of harmful elements […]

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05/07/2019

Science Blog: Ancient Supercontinents in East Antarctica – Africa Border Zone Revealed by Xenoliths from Vestfjella

Text:
Ilona Romu, Geologist

Exploration and research in the remote and long inaccessible Arctic and Antarctic regions became possible at the late era of sailing vessels. In the western Dronning Maud Land of East Antarctica, Vestfjella, known also as the Kraul Mountains, was first listed on the map in the 1930s and some of the first printed geological notes […]

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04/01/2019

Science Blog: Microstructural and 3D X-ray Tomographic Study of the High-purity Quartz (HPQ): Examples from Finland

Text:
Thair Al-Ani, Senior Scientist

High purity quartz is one of the primary strategic raw materials in the manufacture of semiconductors, high- temperature lamp tubing, optics, telecommunication and electronic devices, and solar silicon applications (Haus 2010; Moore 2005; Dal Martello et al. 2011a, b). The Geological Survey of Finland (GTK) has been active in locating potential deposits of high-purity quartz […]

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03/11/2019

Science Blog: Reflections from the project COGITO-MIN

Text:
Suvi Heinonen, Senior Scientist

August 2016, I was driving from Helsinki towards Polvijärvi with anticipation. I was being followed by  groups from the University of Helsinki, the Institute of Geophysics Polish Academy of Sciences, Vibrometric Oy and Geopartner Ltd., with seismic equipment worth millions of Euros. We all had a common goal: to acquire multiple high-quality seismic data sets […]

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02/12/2019

Science Blog: Cross-border cooperation for proper storm water handling

Text:
Johannes Klein, Senior Scientist

Storm water management is a subject now high on the agendas of many cities in Northern Europe. Two major phenomena drive the need for improvement in storm water management and the search for alternative approaches; the expectation of more heavy downpours and an ever-increasing amount of sealed surface. Combined, these two factors can cause sewage […]

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02/04/2019

Science Blog: Estimating the lithium resources of Finland

Text:
Kalevi Rasilainen, Geologist

The Geological Survey of Finland (GTK) has been carrying out assessments of undiscovered mineral resources in the Finnish bedrock since 2008. As a part of this process, the lithium resources hosted by undiscovered lithium–caesium–tantalum (LCT) pegmatite deposits were estimated down to the depth of one kilometre in 2018. Presently, the world’s dominant sources of lithium […]

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