<?xml version="1.0" encoding="UTF-8"?><!--*** Generated from internal PANGAEA metadata schema by dif.xslt ***--><DIF xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.4.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/">
<Entry_ID>PANGAEA_864229</Entry_ID>
<Entry_Title>Observation of manganese nodules and encrustations in various lakes of Finland</Entry_Title>
<Data_Set_Citation>
<Dataset_Creator>Halbach, Peter</Dataset_Creator>
<Dataset_Title>Observation of manganese nodules and encrustations in various lakes of Finland</Dataset_Title>
<Dataset_Release_Date>1975</Dataset_Release_Date>
<Dataset_Publisher>PANGAEA</Dataset_Publisher>
<Data_Presentation_Form>Dataset</Data_Presentation_Form>
<Other_Citation_Details>Supplement to: Halbach, Peter (1976): Mineralogical and geochemical investigations on Finnish lake ores. Bulletin of the Geological Society of Finland, 48(1-2), 33-42, https://doi.org/10.17741/bgsf/48.1-2.004</Other_Citation_Details>
<Online_Resource>https://doi.pangaea.de/10.1594/PANGAEA.864229</Online_Resource>
</Data_Set_Citation>
<Personnel>
<Role>Investigator</Role>
<First_Name>Peter</First_Name>
<Last_Name>Halbach</Last_Name>
</Personnel>
<Discipline>
<Discipline_Name>Earth Science</Discipline_Name>
</Discipline>
<Parameters>
<Detailed_Variable>Event label</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Latitude of event</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Longitude of event</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Elevation of event</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Sample ID</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>DEPTH, sediment/rock</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Position</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Deposit type</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Quantity of deposit</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Size</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Shape</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Substrate type</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Description</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Uniform resource locator/link to image</Detailed_Variable>
</Parameters>
<ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
<Keyword>Kirrinjarvi_H</Keyword>
<Keyword>Rotimojarvi_H</Keyword>
<Keyword>Salahmijarvi_H</Keyword>
<Data_Set_Progress>Complete</Data_Set_Progress>
<Spatial_Coverage>
<Southernmost_Latitude>62.23771</Southernmost_Latitude>
<Northernmost_Latitude>63.966571</Northernmost_Latitude>
<Westernmost_Longitude>25.1704</Westernmost_Longitude>
<Easternmost_Longitude>26.9</Easternmost_Longitude>
<Minimum_Depth>0.0 m (DEPTH, sediment/rock)</Minimum_Depth>
<Maximum_Depth>0.0 m (DEPTH, sediment/rock)</Maximum_Depth>
</Spatial_Coverage>
<Project>
<Short_Name>NOAA-MMS</Short_Name>
<Long_Name>NOAA and MMS Marine Minerals Geochemical Database</Long_Name>
</Project>
<Access_Constraints>unrestricted</Access_Constraints>
<Use_Constraints>CC-BY-3.0: Creative Commons Attribution 3.0 Unported</Use_Constraints>
<Data_Set_Language>English</Data_Set_Language>
<Data_Center>
<Data_Center_Name>
<Short_Name>PANGAEA</Short_Name>
<Long_Name>Data Publisher for Earth &amp; Environmental Science</Long_Name>
</Data_Center_Name>
<Data_Center_URL>https://www.pangaea.de/</Data_Center_URL>
<Personnel>
<Role>Data Center Contact</Role>
<First_Name>Michael</First_Name>
<Last_Name>Diepenbroek</Last_Name>
<Email>info@pangaea.de</Email>
<Contact_Address>
<Address>Leobener Str.</Address>
<City>Bremen</City>
<Province_or_State>Bremen</Province_or_State>
<Postal_Code>28359</Postal_Code>
<Country>Germany</Country>
</Contact_Address>
</Personnel>
</Data_Center>
<Distribution>
<Distribution_Media>online</Distribution_Media>
<Distribution_Size>37 data points</Distribution_Size>
<Distribution_Format>text/tab-separated-values</Distribution_Format>
</Distribution>
<Reference>Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT</Reference>
<Reference>Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN</Reference>
<Summary>The limnic ferromanganese ore concretions in some Finnish lakes are  described. Their chemical and mineral compositions have been measured as have their natural surroundings — the latter by means of physico-chemical in-situ analysis. The sources of the nodules' contents are discussed, and a theory based on the calculated precipitation fields of the important ore minerals is presented for the ore formation. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.864229"! ** From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.</Summary>
<Related_URL>
<URL>https://doi.org/10.17741/bgsf/48.1-2.004</URL>
<Description>Mineralogical and geochemical investigations on Finnish lake ores</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.7289/V52Z13FT</URL>
<Description>The NOAA and MMS Marine Minerals Geochemical Database</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.7289/V53X84KN</URL>
<Description>The NOAA and MMS Marine Minerals Bibliography</Description>
</Related_URL>
<Related_URL>
<URL>https://wiki.pangaea.de/wiki/NOAA-MMS</URL>
<Description>NOAA-MMS</Description>
</Related_URL>
<Metadata_Name>DIF</Metadata_Name>
<Metadata_Version>9.4</Metadata_Version>
<DIF_Creation_Date/>
<Last_DIF_Revision_Date>2026-04-30</Last_DIF_Revision_Date>
</DIF>
