Till geochemistry sample series
| Regional till geochemistry survey samples | |
|---|---|
| Summary of dataset content: | Samples have been taken from unaltered till (horizon C) below the groundwater table at a depth of approximately 1.5 – 2 metres. The samples are combined field samples. The estimated coordinates for the sampling points saved in the dataset have been calculated on the basis of the coordinates for 3–5 subsamples. The subsamples can also be aggregate samples taken from linear formed till. The original application for the dataset was ore exploration. Please note! The archived sample is the screened <0.06 mm powder, not the original field sample! |
| Original application: | The determination of the chemical characteristics of till material for the purpose of conducting ore exploration and environmental study. |
| Geographical information product related to the dataset: | Regional till geochemistry (Hakku) |
| Analysis information for the dataset: | Analysis fractions <0.06 mm have been screened from the samples. The concentrations of soluble parts in aqua regia for approximately 25 chemical elements have been analysed from the samples. |
| Volume: | The total number of samples is 82,062 (x3 fractions: fine, medium and coarse) |
| Resolution (sample density): | One sample per four square kilometres |
| Geographic coverage: | The dataset covers the entire nation of Finland |
| Geographic coverage: | 1983 – 1991 |
| Physical form and storage conditions for the samples: | Powder packed in small plastic containers or plastic bags, weight approximately 5-15 g. |
| Sample identification: | Observation number, on the basis of which location and analysis data is available? |
| Resource address: | Sampling points on the map: http://gtkdata.gtk.fi/mdae/index.html |
| Location of the dataset: | Drill Core Archive in Loppi |
| Keywords: | geology, soil, till, chemical elements, geochemistry, stream sediment, mapping, sampling, chemical analysis, geochemical studies, geochemical provinces, stream water |
| Historical information: | http://tupa.gtk.fi/paikkatieto/meta/regional_till_geochemistry.html |
| Availability and terms of use / Public availability restrictions: | According to the agreement. |
| Responsible organization: | Geological Survey of Finland, geodata_gtk.fi |
| Metadata date: | 2015-04-15 |
| Targeting till geochemistry mapping samples | |
|---|---|
| Summary of dataset content: | The local geochemical mapping of till contains of soil samples collected by GTK along sampling lines in 1971-1983. In total, the material contains 385 000; app. 300 000 samples remains left in the archives. Most of the samples are till, but there are also sorted mineral soils, weathered bedrock and mixed intermediate forms containing both. The till samples contain both fine (P, < 0.06 mm) and medium (K, 0.06-0.25 mm) fractions. The samples were collected nationwide by 1:100 000 map sheets arranged in a discretionary order. The intended nationwide sample line network was not completed, since the sampling strategy changed. The concentration of 17 elements were determined from the samples using an emission quantometer. |
| Original application: | The objective of the geochemical survey is to map the prevalence of elements in the ground. |
| Geographical information product related to the dataset: | Targeting till geochemistry (Hakku) |
| Analysis information for the dataset: | Analysis fractions <0.06 mm have been screened from the samples. The concentrations of 17 chemical elements have been analysed from the samples. |
| Volume: | The total number of samples is 385 000; app. 300 000 samples (75%) remains left in the archives. Availability varies according to area. |
| Resolution (sample density): | The point density of soil sampling varies between 6-12 samples/km2. The line interval is 500-2000 metres and the point interval is 100-400 metres. Sample collection depth varies greatly, but on average, it is 2 metres. |
| Geographic coverage: | The dataset covers the selected parts in Northern Finland and Ladoga-Bothnian Bay zone. |
| Sampling years (time reference): | 1971-1983 |
| Physical form and storage conditions for the samples: | Powder packed in small plastic containers, weight varies from few grams to approximately 30 g for fine fraction and app. 10-30 g for medium fraction. |
| Sample identification: | Observation code (year, observation number, depth) |
| Resource address: | https://hakku.gtk.fi/en/locations/search?location_id=13 |
| Location of the dataset: | Drill Core Archive in Loppi |
| Keywords: | geology, soil, geochemistry, till, mapping, sampling, chemical analysis, geochemical surveys, chemical elements |
| Historical information: | http://tupa.gtk.fi/paikkatieto/meta/targeting_till_geochemistry.html |
| Availability and terms of use / Public availability restrictions: | According to the agreement. |
| Responsible organization: | Geological Survey of Finland, geodata_gtk.fi |
| Metadata date: | 2019-04-26 |
| Detailed till geochemistry samples, GTK | |
|---|---|
| Summary of dataset content: | Samples indicating the geochemical properties of the soil and the variation of element concentrations therein have been collected in the Finnish territory since 1960’s. The sample material is mostly till and weathered bedrock, but some samples also contain sorted soils, bedrock samples and boulder samples. The till samples have been sieved to obtain a fraction of less than 0.06 mm for analysis. Likewise, the weathered bedrock samples were sieved or milled to obtain a fraction of 0.06 mm. Some till samples were milled in their entirety without sieving in advance. The samples were extracted with aqua regia or nitric acid and the extract was analysed for multiple elements. The analysis methods atomic absorption spectrophotometry (FAAS and GAAS) and/or plasma atomic emission spectrometry (ICP-AES), quantimetry (EKV). |
| Original application: | The material is used as support for site-specific survey of natural resources, and for the needs of scientific research, environmental management and the other needs of society. |
| Geographical information product related to the dataset: | Detailed till geochemistry, GTK (Hakku) |
| Analysis information for the dataset: | Analysis fractions <0.06 mm have been screened from the samples. The amount of analysed elements depends on the analysis method. |
| Volume: | The total number of samples is 468 481; app. 350 000 samples (75%) remains left in the archives. Availability varies according to area. |
| Resolution (sample density): | variable; depending on the characteristics of the study and target, the data has been collected as points, lines or as grid sampling |
| Geographic coverage: | variable, local |
| Sampling years (time reference): | from 1960’s to present |
| Physical form and storage conditions for the samples: | Powder packed in small plastic containers, weight varies from few grams to app. 30 g. |
| Sample identification: | Observation code (year, observation number, depth) |
| Resource address: | https://hakku.gtk.fi/en/locations/search?location_id=59 |
| Location of the dataset: | Drill Core Archive in Loppi |
| Keywords: | geology, soil, till, chemical elements, geochemistry, stream sediment, mapping, sampling, chemical analysis, geochemical studies, geochemical provinces, stream water |
| Historical information: | http://tupa.gtk.fi/paikkatieto/meta/gtk_detailed_till_geochemistry.html |
| Availability and terms of use / Public availability restrictions: | According to the agreement. |
| Responsible organization: | Geological Survey of Finland, geodata_gtk.fi |
| Metadata date: | 2019-02-07 |
| Detailed till geochemistry samples, OKU | |
|---|---|
| Summary of dataset content: | The Outokumpu-GTK data transfer project, which was implemented between the years 2003 and 2007, transferred to GTK app. 500 000 targeted till samples. Before this, the material was in custody of Outokumpu Mining Oy. The material was acquired in 1970-1998 for exploration purposes by Outokumpu Oy, Lapin Malmi Oy and Rautaruukki Oy. The material mostly contains till geochemistry samples, but the material from Rautaruukki Oy also contains bedrock geochemistry and stream sediment geochemistry samples. |
| Original application: | The data was acquired in 1970-1998 for targeted exploration purposes at Outokumpu Oy, Lapin Malmi Oy and Rautaruukki Oy. |
| Geographical information product related to the dataset: | Detailed till geochemistry, OKU (Hakku) |
| Analysis information for the dataset: | http://tupa.gtk.fi/paikkatieto/meta/oku_detailed_till_geochemistry.html |
| Volume: | The total number of samples is app. 500 000; app. 90% remains left in the archives. |
| Resolution (sample density): | variable; depending on the characteristics of the study and target, the data has been collected as points, lines or as grid sampling |
| Geographic coverage: | variable, local |
| Sampling years (time reference): | 1970-1998 |
| Physical form and storage conditions for the samples: | Powder packed in small plastic containers, weight varies from few grams to approximately 30 g. |
| Sample identification: | Observation code (year, observation number) |
| Resource address: | https://hakku.gtk.fi/en/locations/search?location_id=58 |
| Location of the dataset: | Drill Core Archive in Loppi |
| Keywords: | geochemistry, mineral exploration, sampling, analysis, till |
| Historical information: | http://tupa.gtk.fi/paikkatieto/meta/oku_detailed_till_geochemistry.html |
| Availability and terms of use / Public availability restrictions: | According to the agreement. |
| Responsible organization: | Geological Survey of Finland, geodata_gtk.fi |
| Metadata date: | 2019-02-07 |
