January 7, 2026 Dataset Open Access

Pospiech, Solveig; Middleton, Maarit

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  <identifier identifierType="DOI">10.14278/rodare.4328</identifier>
  <creators>
    <creator>
      <creatorName>Pospiech, Solveig</creatorName>
      <givenName>Solveig</givenName>
      <familyName>Pospiech</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0003-2727-2375</nameIdentifier>
    </creator>
    <creator>
      <creatorName>Middleton, Maarit</creatorName>
      <givenName>Maarit</givenName>
      <familyName>Middleton</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0002-9117-7690</nameIdentifier>
      <affiliation>Geological Survey of Finland: Espoo, Uusimaa, FI</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Data publication: Elemental data from transpired fluid from Norway spruce needles of the Horizon 2020 project NEXT</title>
  </titles>
  <publisher>Rodare</publisher>
  <publicationYear>2026</publicationYear>
  <subjects>
    <subject>Norway spruce</subject>
    <subject>mineral exploration</subject>
    <subject>Finland</subject>
    <subject>transpired fluid</subject>
    <subject>Gold</subject>
    <subject>ore geology</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2026-01-07</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Dataset"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://rodare.hzdr.de/record/4328</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsSupplementedBy">https://www.hzdr.de/publications/Publ-41163</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsIdenticalTo">https://www.hzdr.de/publications/Publ-42687</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsReferencedBy">https://www.hzdr.de/publications/Publ-41163</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.14278/rodare.4327</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://rodare.hzdr.de/communities/energy</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://rodare.hzdr.de/communities/rodare</relatedIdentifier>
  </relatedIdentifiers>
  <version>v1</version>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;&lt;strong&gt;1. Overview&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;This repository contains the **final, cleaned chemistry data** that were produced from the 2019 Raja field campaign of the Horizon 2020 Project NEXT.&lt;br&gt;
The data combine:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Norway spruce needle transpired fluids concentrations for a set of selected elements.&lt;/li&gt;
	&lt;li&gt;Corresponding soil‑till depth, point location, lithology and basic tree information.&lt;/li&gt;
	&lt;li&gt;Element‑specific relative‑standard‑deviation (RSD) uncertainties that were calculated from laboratory‑derived uncertainty parameters.&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;All files are provided in **CSV** format (UTF‑8, `,` separator) and/or the R programming language binary format RData.&lt;/p&gt;

&lt;p&gt;&lt;br&gt;
&lt;strong&gt;2. Column description&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;**Field Descriptions for Repository Metadata**&lt;/p&gt;

&lt;p&gt;#### **Point Identification &amp;amp; Metadata**&lt;br&gt;
1. **PointID** &amp;ndash; Unique identifier for each sampling point in the dataset (e.g., `NEXT-2019-193`).&lt;br&gt;
2. **till_depth** &amp;ndash; Depth of the till layer (in meters) at the sampling location.&lt;br&gt;
3. **ID_num** &amp;ndash; Numeric identifier for the point (e.g., `193`).&lt;br&gt;
4. **grainsize_2mm_pct** &amp;ndash; Percentage of grain size &amp;gt;2mm in the soil sample (proxy for rock fragments or coarse material).&lt;br&gt;
5. **OM_thickness** &amp;ndash; Thickness of organic matter (cm) in the soil profile.&lt;br&gt;
6. **Soilwetness_by_photo** &amp;ndash; Soil wetness category inferred from field photos (e.g., `mesic` = moist, `sub-xeric` = moderately dry).&lt;br&gt;
7. **Soilwetness_cat** &amp;ndash; Numeric ranking of soil wetness (likely 1&amp;ndash;7, with `1` = driest, `7` = wettest).&lt;br&gt;
8. **notes_by_photos** &amp;ndash; Qualitative observations from site photos (e.g., &amp;quot;paludified areas nearby,&amp;quot; &amp;quot;boulders present&amp;quot;).&lt;/p&gt;

&lt;p&gt;#### **Geophysical &amp;amp; Electrical Properties**&lt;br&gt;
9. **conductivity_ph-acid** &amp;ndash; Electrical conductivity (EC) measured after acidification (mS/m).&lt;br&gt;
10. **conductivity_ph-initial** &amp;ndash; Initial EC of the soil sample (mS/m).&lt;br&gt;
11. **conductivity_pit** &amp;ndash; EC measured in the field pit (mS/m).&lt;br&gt;
12. **conductivity** &amp;ndash; Conductivity averaged or processed for analysis (units vary).&lt;br&gt;
13. **dielectric permittivity_pit** &amp;ndash; Dielectric constant measured in the pit (proxy for soil moisture).&lt;br&gt;
14. **dielectric permittivity** &amp;ndash; Processed or averaged dielectric permittivity value.&lt;br&gt;
15. **pH_initial** &amp;ndash; Initial pH of the soil sample.&lt;br&gt;
16. **pH_with acid** &amp;ndash; pH after acidification (indicates buffer capacity).&lt;br&gt;
17. **pore water conductivity** &amp;ndash; EC of extracted pore water (mS/m).&lt;/p&gt;

&lt;p&gt;#### **Geospatial &amp;amp; Environmental Context**&lt;br&gt;
18. **VTEM, TMI, APR** &amp;ndash; Geophysical survey metrics (VTEM = Vertical Electromagnetic, TMI = Total Magnetic Intensity, APR = Airborne Radiometrics).&lt;br&gt;
19. **Soilwetness** &amp;ndash; Categorical soil wetness classification (e.g., `mesic`, `sub-xeric`).&lt;br&gt;
20. **Soiltype** &amp;ndash; Predominant soil type (e.g., `mineral soil`, `peat`).&lt;br&gt;
21. **Naturetype** &amp;ndash; Ecological classification (e.g., `Boreaaliset luonnonmets&amp;auml;t` = &amp;quot;Boreal natural forests&amp;quot;).&lt;br&gt;
22. **TMI_class** &amp;ndash; Categorization of Total Magnetic Intensity (e.g., `low`, `middle`, `high`).&lt;br&gt;
23. **Lithology** &amp;ndash; Original rock type classification (e.g., `Calcsilicate rocks`, `Mafic rocks`).&lt;br&gt;
24. **Lithology_updated** &amp;ndash; Updated lithological classification (refining earlier interpretations).&lt;br&gt;
25. **Lithology_updated_Sol** &amp;ndash; Lithology-specific to soil horizons (e.g., `Mafic rocks + quartzite`).&lt;br&gt;
26. **Mineralization** &amp;ndash; Qualitative assessment of mineralized zones (e.g., `barren`, `potential`, `min`).&lt;br&gt;
27. **Deposit** &amp;ndash; Type of geological deposit (e.g., `Till`, `hardpan layer`).&lt;br&gt;
28. **TMI_cat, VTEM_cat, APPRES_cat** &amp;ndash; Categorized geophysical survey results (e.g., `high` intensity).&lt;br&gt;
29. **vegetation_class_EFTAS** &amp;ndash; Vegetation classification (e.g., `mesic heath forest`).&lt;br&gt;
30. **i.ID_num** &amp;ndash; Redundant numeric ID (same as `ID_num`).&lt;br&gt;
31. **x, y** &amp;ndash; Cartesian coordinates for the sampling point.&lt;br&gt;
32. **Fotos** &amp;ndash; Reference to associated field photos (e.g., `104-0905`).&lt;/p&gt;

&lt;p&gt;#### **Site &amp;amp; Sampling Details**&lt;br&gt;
33. **GeneralSiteDescription** &amp;ndash; Textual description of terrain (e.g., &amp;quot;flat, paludified area starts 1m below&amp;quot;).&lt;br&gt;
34. **ForestType** &amp;ndash; Dominant forest type (e.g., `VMT` = &amp;quot;V&amp;auml;limets&amp;auml;&amp;quot; [forest type code]).&lt;br&gt;
35. **Soil_paludification** &amp;ndash; Degree of peatland/wetland influence on soil (e.g., `not paludified`).&lt;br&gt;
36. **Soil_nutrient_status** &amp;ndash; Nutrient availability assessment (e.g., `normal`).&lt;br&gt;
37. **Observations2019** &amp;ndash; Anomalies or notes from 2019 fieldwork (e.g., &amp;quot;eggs of gnomes in upper podsol layer&amp;quot;).&lt;br&gt;
38. **SedimentType** &amp;ndash; Type of sediment observed (e.g., `Till`, `Sand`).&lt;br&gt;
39. **SedimentGenesis** &amp;ndash; Origin of sediment (e.g., `glacial`, `alluvial`).&lt;br&gt;
40. **Pointtype** &amp;ndash; Classification of sampling point (e.g., `replicate`).&lt;br&gt;
41. **TMI_intensity, VTEM_intensity, APPRES_intensity** &amp;ndash; Quantitative geophysical survey intensities.&lt;br&gt;
42. **GPS-Easting, GPS-Northing** &amp;ndash; Precise GPS coordinates for the point.&lt;br&gt;
43. **SampleID** &amp;ndash; Unique identifier for lab samples (e.g., `TF-NEXT-2019-193-NrS-tf-0A`).&lt;br&gt;
44. **Date_full** &amp;ndash; Timestamp of sample collection/analysis.&lt;/p&gt;

&lt;p&gt;#### **Geochemical Data**&lt;br&gt;
45. **Al, B, Ba, Bi, ... Zn** &amp;ndash; Concentrations of elements (likely in **ppm/mg/g**) measured via lab analysis (e.g., ICP-MS).&lt;br&gt;
&amp;nbsp; &amp;nbsp;*Note: These columns represent a full suite of geochemical elements (e.g., Aluminum, Barium, Lead, Zinc) critical for mineral exploration, environmental studies, or soil health assessments.*&lt;/p&gt;

&lt;p&gt;---&lt;br&gt;
### **Key Notes for Repository Users**&lt;br&gt;
- **Units**: Conductivity (mS/m), pH (unitless), dielectric permittivity (dimensionless), GPS coordinates (meters, local system).&lt;br&gt;
- **Categorical Fields**: Wetness, lithology, and mineralization use standardized codes (e.g., `mesic` vs. `xeric`).&lt;br&gt;
- **Geophysical Data**: VTEM/TMI/APR are airborne survey metrics linked to subsurface mineralization.&lt;br&gt;
- **Geochemical Data**: Elemental concentrations are essential for understanding soil fertility, contamination, or ore potential.&lt;/p&gt;

&lt;p&gt;---&lt;br&gt;
### **Suggested Use Cases**&lt;br&gt;
- **Mineral Exploration**: Cross-reference `Mineralization` + `TMI_cat` with elemental data (e.g., high `Fe`, `Cr` for mafic rocks).&lt;br&gt;
- **Soil Science**: Analyze `Soilwetness` vs. `dielectric permittivity` to model moisture regimes.&lt;br&gt;
- **Ecological Studies**: Correlate `vegetation_class_EFTAS` with `Soil_nutrient_status`.&lt;/p&gt;</description>
  </descriptions>
</resource>