10/13/2017

(suomi) Geoblogi: GTK aloitti Keski-Lapissa postglasiaalisiirrosten vesien pitkäaikaisseurannan

Text:
Mira Markovaara-Koivisto, (suomi) geologi

[/caption]Juhannusviikolla instrumentoimme valittuihin kairanreikiin antureita, jotka keräävät 30 minuutin välein siirroksessa liikkuvan veden sähkönjohtavuus-, lämpötila- ja painetietoa. Datan voin lukea vaivattomasti toimistolta käsin puhelinyhteyttä käyttäen. Postglasiaalisiirrokset voivat purkaa vettä myös niiden yli kulkeviin jokiin. Nuutijokeen asensimme yhden seuranta-aseman yläjuoksulle Suasselän postglasiaalisiirrokseen nähden, ja toisen aseman Nuutijoen laskujokeen Seurujokeen, joka on siirroksen alajuoksun puolella. Postglasiaalisiirroksista purkautuva vesi […]

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10/02/2017

Science blog: Understanding long-term evolution in nuclear waste disposal through geology

Text:
Heini Reijonen, Chief Scientist

Geological disposal of radioactive waste Several options have been investigated for the management of radioactive waste, especially high-level wastes, such as spent nuclear fuel. Geological disposal is the internationally preferred option to deal with high-level radioactive waste. Even in cases where the fuel is treated or re-used, high-level waste, with variable compositions, will still be […]

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09/29/2017

Geoblogi: Kansainvälinen ryhmä tutkii postglasiaalisiirroksia Lapissa

Text:
Antti Ojala, (suomi) erikoistutkija
Maarit Middleton, (suomi) erikoistutkija

[/caption]Työn tavoitteena oli tutkia Vaalajärven ja Ristonmännikön siirrosten sisäistä rakennetta, kinematiikkaa ja vaikutuksia ympäristön muihin rakenteisiin, sekä arvioida koska ja millä tavalla kallioperän liikunto on tapahtunut. Tavoitetta lähestyttiin monin poikkitieteellisin tutkimusmenetelmin, kuten kuvaamalla maaperän sedimentologisia yksiköitä, tekemällä maa- ja kallioperässä näkyvistä piirteistä rakennegeologisia mittauksia, ottamalla näytteitä kemiallisiin analyyseihin ja ajoituksiin, sekä kuvaamalla leikkausseinämiä hyperspektrimenetelmän avulla. […]

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08/14/2017

Science Blog: Gas studies help to elucidate safety issues related to underground construction

Text:
Riikka Kietäväinen, Research Scientist

As economic natural gas accumulations are not known from Finland, gases have often been overlooked in bedrock and groundwater studies. However, gases, including methane, nitrogen, hydrogen and helium, can also be found in the Precambrian crystalline bedrock of the Fennoscandian Shield. The gases are mainly dissolved in water, but bubbling is also seen here and […]

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06/05/2017

Science Blog: Current Research Projects

Text:
Niko Putkinen, Geologist

Modern and Ancient Glaciations project Niko has been collaborating in the utilization of new imagery (LiDAR) to shed new light on the origin of drumlins and megaflutings formed under soft-bedded glaciers. Following his postdoctoral year in the laboratory of Nick Eyles at the Department of Physical and Environmental Sciences, University of Toronto at Scarborough (UTSC) […]

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05/10/2017

Science Blog: Stable Isotope Studies by Microbeam Analyses and Sources of Fluids in Orogenic Gold Mineral Systems

Text:
Ferenc Molnár, Research Professor

In situ mass spectrometric techniques are among the most rapidly developing analytical techniques that are revolutionizing our understanding of mineralogy, petrology and geochemistry. The advantage of these techniques is that they enable us to study very small mineral samples (e.g. a few hundreds of cubic micrometres), while still producing precise analyses of isotope ratios or […]

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04/26/2017

Science Blog: Groundwater as an Energy Resource in Finland

Text:
Teppo Arola, Chief Expert

Groundwater can be seen as an option for renewable energy utilisation and not only a source of individual or municipal drinking water. Finland has multiple groundwater reservoirs that are easily exploitable, but groundwater energy is not commonly used for renewable energy production. For this blog, I would like to briefly highlight the outcomes of my […]

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03/20/2017

Science Blog: Assessing the unknown: Finland’s undiscovered mineral resources

Text:
Kalevi Rasilainen, Geologist
Pasi Eilu, Senior Scientist

Assessments carried out by the Geological Survey of Finland (GTK) since 2008 indicate that Finland has notable undiscovered resources of several important metals. As of the end of 2016, assessment results have been published for platinum (Pt), palladium (Pd), gold (Au), silver (Ag), copper (Cu), zinc (Zn), nickel (Ni), cobalt (Co), lead (Pb), molybdenum (Mo) […]

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03/10/2017

Geo-Blog: New survey of the Helsinki–Tallinn railway tunnel route

Text:
Kimmo Alvi, Geologist
Ossi Ikävalko, Senior Specialist
Keijo Nenonen, Chief Expert, Science and Innovations

The Geological Survey of Finland (GTK) conducted acoustic-seismic surveys of the possible routes  for an undersea railway tunnel between Helsinki and Tallinn. The report was commissioned by the Helsinki-Uusimaa Regional Council (Figure 1). The survey provided a detailed overview of the geological structure of the sea floor basement and deposits between Finland and Estonia. The […]

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