Modified: 15.07.2008
Geochemical Data
Geological Survey of Finland processes geochemical data from
The bedrock data are stored as data files, the other data are stored in the ALKEMIA
relational databases.
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BEDROCK at reconnaissance scale
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Material:
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Bedrock
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Sampling density:
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1 sample / 120 km
2 – 1 sample / 30 km
2
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Coverage:
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Whole country, 6544 samples
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Analyses:
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Total concentrations of 54 elements, aqua regia soluble
concentrations of 32 elements
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Usage (examples):
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Regional scale studies of bedrock units, metallogenic
studies
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Availability:
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Digital format only at:
http://www.gtk.fi/publ/RGDB
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TILL at reconnaissance scale |
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Material:
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Basal till, the sampling depth 0.7 m in average |
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Sampling density:
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1 sample / 300 km
2 |
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Coverage:
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Whole country, 1057 samples |
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Analyses:
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Total concentrations of 38 elements, aqua regia soluable
concentration of 24 elements from fine fraction (<0.06 mm) of till |
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Usage (examples):
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Buffering capacity and nutrient level in forest soils, heavy metal
concentration in catchment areas, prospecting |
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Availability:
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Digital format and the publication: Koljonen, Tapio (ed.) 1992.
Suomen geokemian atlas. Osa 2 : Moreeni = The Geochemical Atlas of Finland. Part 2 : Till. Espoo:
Geologian tutkimuskeskus. 218 p. + 9 app. maps. |
| TILL at regional scale |
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Material:
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Basal till, the sampling depth 1.5 - 2.0 m |
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Sampling density:
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1 sample / 4 km
2 |
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Coverage:
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Whole country, 82000 samples |
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Analyses:
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Aqua regia soluable concentration of ca. 24 elements from fine
fraction (<0.06 mm) of till |
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Usage (examples):
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Buffering capacity and nutrient level in forest soils, heavy metal
concentration in catchment areas, prospecting |
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Availability:
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Digital format and the publication: Salminen, Reijo (ed.) 1995.
Alueellinen geokemiallinen kartoitus Suomessa 1982-1994. Summary: Regional geochemical mapping in
Finland in 1982-1994. Geologian tutkimuskeskus. Tutkimusraportti 130. 47 p. + 24 app. maps. |
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LAKE SEDIMENTS at regional scale |
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Material:
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Bulk sample from the uppermost 10 cm layer of lake sediment, 1973 - 1984 |
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Sampling density:
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1 sample / 5 km
2 |
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Coverage:
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Lake District, ca. 16000 samples |
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Analyses:
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Concentrations of 8 elements from ash |
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Usage (examples):
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Heavy metal concentration in lake sediments, prospecting |
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Availability:
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Digital format and the publication: Tenhola, Markku 1988.
Alueellinen geokemiallinen järvisedimenttikartoitus Itä-Suomessa. Summary: Regional geochemical
mapping based on lake sediments in eastern Finland. Geologian tutkimuskeskus. Tutkimusraportti 78.
42 p. |
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STREAM SEDIMENTS AND
STREAM WATERS
at reconnaissance scale
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Material:
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Topmost fine grained organic rich layer of stream sediments and stream water.
August 1990. |
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Sampling density:
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1 sample / 300 km
2 |
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Coverage:
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Whole country |
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Analyses:
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Concentrations of 29 elements from stream sediments. From stream
waters same elements and pH, EC, colour index, COD, HCO
3, SO
4, Cl, F, SiO
2, and NO
3 |
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Usage (examples):
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The quality of stream waters and stream sediments |
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Availability:
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Digital format and the publication: Lahermo, P.; Väänänen, P.;
Tarvainen, T.; Salminen, R. 1996. Suomen geokemian atlas. Osa 3 : Ympäristögeokemia - purovedet ja
-sedimentit = Geochemical atlas of Finland. Part 3 : Environmental geochemistry - stream waters and
sediments. Espoo: Geologian tutkimuskeskus. 149 p. |
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GROUND WATER at reconnaissance and regional scale |
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Material:
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Water samples from natural springs, drilled wells and dug wells |
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Sampling density:
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At the reconnaissance scale 1 sample / 50 km
2 1978 - 1982. At regional scale ground water is sampled as part of 1 : 20 000 scale
mapping of the Quaternary deposits. Detailed studies from certain regions. New sampling covering
all Finland in 1999 (1002 samples). |
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Coverage:
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Whole country |
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Analyses:
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At reconnaissance scale: Concentrations from 21 elements and pH,
EC, colour index, COD, HCO
3, SO
4, Cl, F, SiO
2, and NO
3. At regional scale also 17 additional elements. In the 1999 study: 52 parameters |
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Usage (examples):
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The quality of ground water |
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Availability:
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- Lahermo, Pertti; Ilmasti, Maija; Juntunen, Risto; Taka, Matti 1990. Suomen geokemian atlas. Osa
1 : Suomen pohjavesien hydrogeokemiallinen kartoitus = The Geochemical Atlas of Finland. Part 1 :
The hydrogeochemical mapping of Finnish groundwater. Espoo: Geologian tutkimuskeskus. 66 p. + 1
app.
- Lahermo, Pertti; Tarvainen, Timo; Hatakka, Tarja; Backman, Birgitta; Juntunen, Risto;
Kortelainen, Nina; Lakomaa, Tuula; Nikkarinen, Maria; Vesterbacka, Pia; Väisänen, Ulpu; Suomela,
Pekka 2002. Tuhat kaivoa - Suomen kaivovesien fysikaalis-kemiallinen laatu vuonna 1999. Summary:
One thousand wells - the physical-chemical quality of Finnish well waters in 1999. Geologian
tutkimuskeskus. Tutkimusraportti 155. 92 p.
- Backman, Birgitta 1993. Lammin - Kosken (Hl) alueen pohjaveden seurantatutkimus. Vuosien
1969-1990 tulokset. Summary: Groundwater monitoring in the Lammi-Koski area, results for 1969-1990.
Geologian tutkimuskeskus. Tutkimusraportti 118. 100 p.
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Enquiries about GIS-data: geodata
 gtk.fi
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Foregs Geochemical Atlas
of Europe