GFZ Data Services

Released
Dataset

Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany)

Cite as:

Förster, Hans-Jürgen (2019): Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany). GFZ Data Services. http://doi.org/10.5880/GFZ.4.8.2019.001

Status

I   N       R   E   V   I   E   W : Förster, Hans-Jürgen (2019): Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany). GFZ Data Services. http://doi.org/10.5880/GFZ.4.8.2019.001

Abstract

This data set is the 4th contribution of a series reporting chemical data for accessory minerals from felsic igneous rocks. It deals with two late Variscan biotite-granite massifs emplaced in the Saxothuringian Zone of the Variscan Orogen (Erzgebirge−Vogtland metallogenic province) in Germany. Mineral compositions were measured by electron-microprobe on surface rocks and borehole samples.

The data set assembles the results of electron-microprobe spot analyses of primary and secondary allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-phase biotite-granite plutons of Kirchberg (KIB, Western Erzgebirge) and Niederbobritzsch (NBZ, Eastern Erzgebirge). Both plutons comprise several, compositionally and texturally distinct sub-intrusions, contain locally centimeter- to decimeter-sized co-genetic enclaves and xenoliths, and are cross-cut by chemically distinct, fine-grained aplitic dikes. These late-Variscan (c. 325 Ma) granites are moderately to highly evolved and (not considering enclaves) span the SiO2-range (in wt%) 67.0-77.4 (KIB) and 66.8-76.2 (NBZ). The granites are weakly peraluminous (A/CNK = 1.04−1.11 for KIB and 0.99-1.10 for NBZ) and of transitional I−S-type affinity.

Formation of primary allanite-(Ce) was restricted to the least-evolved subintrusions KIB1 and NBZ1 of both massifs. All other granites contain monazite-(Ce) as predominant LREE host. Magmatic allanite-(Ce) is variably altered and characterized by totals <100 wt%, implying the presence of several wt% water in the structure. Synchysite-(Ce) constitutes one of its alteration minerals. The Kirchberg massif hosts a second sub-facies of KIB1 that contains monazite instead of allanite as primary species. Severe alteration of this granite facies gave rise to partial or complete dissolution of part of the monazite accompanied by formation of allanite-epidote solid solutions as alteration product. Monazite-(Ce) displays large variations in Th versus REE concentrations even at thin-section scale. Incorporation of Th is mainly governed by the huttonite substitution Th^4+ + Si^4+ = REE^3+ + P^5+. Thorium concentrations span the range 1.33 – 41.8 wt.% ThO2. Xenotime-(Y) does not occur in KBI1 and NBZ1, but crystallized in all other subintrusions. Notable is the predominance of the heaviest REE Er-Lu (normalized to chondrite).

The data set contains the complete pile of electron-microprobe analyses for the four accessory minerals allanite-(Ce) (ALLA-KIB-NBZ2019), monazite-(Ce) (MONA-KIB-NBZ2019), xenotime-(Y) (XENO-KIB-NBZ2019) and zircon (ZIRC-KIB-NBZ2019). All tables are presented as Excel (xlsx) and machine-readable csv formats. The content of the tables and further data description are given in the data description file, together with BSE images of primary and secondary allanite-(Ce) from the KIB1 subintrusion.

Contact

Contributors

Rhede, Dieter; Appelt, Oona

Keywords

monazite, xenotime, zircon, allanite, mineral composition, magma differentiation, electron-microprobe analysis, rare earth elements, Variscan orogeny, late Carboniferous, Erzgebirge-Vogtland, multi-phase biotite-granite plutons

GCMD Science Keywords

More Metadata

  • iso19115:  /  download xml
    • MD_Metadata (xsi:schemaLocation=http://www.isotc211.org/2005/gmd http://www.isotc211.org/2005/gmd/gmd.xsd)
      • fileIdentifier
        • CharacterString: doi:10.5880/GFZ.4.8.2019.001
      • language
        • LanguageCode (codeList=http://www.loc.gov/standards/iso639-2/ codeListValue=eng): eng
      • characterSet
        • MD_CharacterSetCode (codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_CharacterSetCode codeListValue=utf8): 
      • hierarchyLevel
        • MD_ScopeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ScopeCode codeListValue=): 
      • hierarchyLevelName
        • CharacterString: 
      • contact
        • CI_ResponsibleParty
          • organisationName
            • CharacterString: GFZ German Research Centre for Geosciences
          • contactInfo
            • CI_Contact
              • address
                • CI_Address
                  • electronicMailAddress
                    • CharacterString: 
              • onlineResource
                • CI_OnlineResource
                  • linkage
                    • URL: http://www.gfz-potsdam.de/
                  • function
                    • CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=information): information
          • role
            • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=pointOfContact): pointOfContact
      • dateStamp
        • Date: 2019-02-26
      • referenceSystemInfo
        • MD_ReferenceSystem
          • referenceSystemIdentifier
            • RS_Identifier
              • code
                • CharacterString: urn:ogc:def:crs:EPSG:4326
      • identificationInfo
        • MD_DataIdentification
          • citation
            • CI_Citation
              • title
                • CharacterString: Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany)
              • date
                • CI_Date
                  • date
                    • Date: 2019-02-26
                  • dateType
                    • CI_DateTypeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode codeListValue=revision): revision
              • identifier
                • MD_Identifier
                  • code
                    • CharacterString: doi:10.5880/GFZ.4.8.2019.001
              • citedResponsibleParty
                • CI_ResponsibleParty
                  • individualName
                    • CharacterString: Förster, Hans-Jürgen
                  • organisationName
                    • CharacterString: GFZ German Research Centre for Geosciences, Potsdam, Germany
                  • role
                    • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode_author): author
          • abstract
            • CharacterString: This data set is the 4th contribution of a series reporting chemical data for accessory minerals from felsic igneous rocks. It deals with two late Variscan biotite-granite massifs emplaced in the Saxothuringian Zone of the Variscan Orogen (Erzgebirge−Vogtland metallogenic province) in Germany. Mineral compositions were measured by electron-microprobe on surface rocks and borehole samples. The data set assembles the results of electron-microprobe spot analyses of primary and secondary allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-phase biotite-granite plutons of Kirchberg (KIB, Western Erzgebirge) and Niederbobritzsch (NBZ, Eastern Erzgebirge). Both plutons comprise several, compositionally and texturally distinct sub-intrusions, contain locally centimeter- to decimeter-sized co-genetic enclaves and xenoliths, and are cross-cut by chemically distinct, fine-grained aplitic dikes. These late-Variscan (c. 325 Ma) granites are moderately to highly evolved and (not considering enclaves) span the SiO2-range (in wt%) 67.0-77.4 (KIB) and 66.8-76.2 (NBZ). The granites are weakly peraluminous (A/CNK = 1.04−1.11 for KIB and 0.99-1.10 for NBZ) and of transitional I−S-type affinity. Formation of primary allanite-(Ce) was restricted to the least-evolved subintrusions KIB1 and NBZ1 of both massifs. All other granites contain monazite-(Ce) as predominant LREE host. Magmatic allanite-(Ce) is variably altered and characterized by totals <100 wt%, implying the presence of several wt% water in the structure. Synchysite-(Ce) constitutes one of its alteration minerals. The Kirchberg massif hosts a second sub-facies of KIB1 that contains monazite instead of allanite as primary species. Severe alteration of this granite facies gave rise to partial or complete dissolution of part of the monazite accompanied by formation of allanite-epidote solid solutions as alteration product. Monazite-(Ce) displays large variations in Th versus REE concentrations even at thin-section scale. Incorporation of Th is mainly governed by the huttonite substitution Th^4+ + Si^4+ = REE^3+ + P^5+. Thorium concentrations span the range 1.33 – 41.8 wt.% ThO2. Xenotime-(Y) does not occur in KBI1 and NBZ1, but crystallized in all other subintrusions. Notable is the predominance of the heaviest REE Er-Lu (normalized to chondrite). The data set contains the complete pile of electron-microprobe analyses for the four accessory minerals allanite-(Ce) (ALLA-KIB-NBZ2019), monazite-(Ce) (MONA-KIB-NBZ2019), xenotime-(Y) (XENO-KIB-NBZ2019) and zircon (ZIRC-KIB-NBZ2019). All tables are presented as Excel (xlsx) and machine-readable csv formats. The content of the tables and further data description are given in the data description file, together with BSE images of primary and secondary allanite-(Ce) from the KIB1 subintrusion.
          • status
            • MD_ProgressCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ProgressCode codeListValue=Complete): Complete
          • pointOfContact
            • CI_ResponsibleParty
              • individualName
                • CharacterString: Förster, Hans-Jürgen
              • organisationName
                • CharacterString: GFZ German Research Centre for Geosciences, Potsdam, Germany
              • positionName
                • CharacterString: Senior Scientist
              • contactInfo
                • CI_Contact
                  • address
                    • CI_Address
                      • electronicMailAddress
                        • CharacterString: hans-juergen.foerster(_at_)gfz-potsdam.de
              • role
                • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode_pointOfContact): pointOfContact
          • descriptiveKeywords
            • MD_Keywords
              • keyword
                • CharacterString: monazite
              • keyword
                • CharacterString: xenotime
              • keyword
                • CharacterString: zircon
              • keyword
                • CharacterString: allanite
              • keyword
                • CharacterString: mineral composition
              • keyword
                • CharacterString: magma differentiation
              • keyword
                • CharacterString: electron-microprobe analysis
              • keyword
                • CharacterString: rare earth elements
              • keyword
                • CharacterString: Variscan orogeny
              • keyword
                • CharacterString: late Carboniferous
              • keyword
                • CharacterString: Erzgebirge-Vogtland
              • keyword
                • CharacterString: multi-phase biotite-granite plutons
          • descriptiveKeywords
            • MD_Keywords
              • keyword
                • CharacterString: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS
              • keyword
                • CharacterString: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > IGNEOUS ROCKS
              • keyword
                • CharacterString: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > MINERALS
              • thesaurusName
                • CI_Citation
                  • title
                    • CharacterString: NASA/GCMD Earth Science Keywords
                  • date
                    • CI_Date
                      • date (gco:nilReason=missing): 
                      • dateType
                        • CI_DateTypeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode codeListValue=publication): publication
          • resourceConstraints (xlink:href=http://creativecommons.org/licenses/by/4.0/)
            • MD_Constraints
              • useLimitation
                • CharacterString: CC BY 4.0
          • resourceConstraints
            • MD_LegalConstraints
              • accessConstraints
                • MD_RestrictionCode (codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_RestrictionCode codeListValue=otherRestrictions): 
              • otherConstraints
                • CharacterString: CC BY 4.0
          • resourceConstraints
            • MD_SecurityConstraints
              • classification
                • MD_ClassificationCode (codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_ClassificationCode codeListValue=unclassified): 
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: http://www.minsocam.org/ammin/AM60/AM60_599.pdf
                  • codeSpace
                    • CharacterString: URL
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=References): References
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: 10.1016/0016-7037(89)90286-X
                  • codeSpace
                    • CharacterString: DOI
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=References): References
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: http://www.minsocam.org/msa/AmMin/TOC/Articles_Free/1998/Forster_p1302-1315_98.pdf
                  • codeSpace
                    • CharacterString: URL
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=IsDocumentedBy): IsDocumentedBy
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: http://www.minsocam.org/msa/AmMin/TOC/Articles_Free/1998/Forster_p259-272_98.pdf
                  • codeSpace
                    • CharacterString: URL
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=IsDocumentedBy): IsDocumentedBy
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: 10.1093/petroj/40.11.1613
                  • codeSpace
                    • CharacterString: DOI
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=IsDocumentedBy): IsDocumentedBy
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: 10.1016/0009-2541(72)90016-2
                  • codeSpace
                    • CharacterString: DOI
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=References): References
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: 10.1111/j.1751-908X.1991.tb00115.x
                  • codeSpace
                    • CharacterString: DOI
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=References): References
          • language
            • CharacterString: eng
          • extent
            • EX_Extent
              • description
                • CharacterString: Kirchberg Massif (KIB)
              • geographicElement
                • EX_GeographicBoundingBox
                  • westBoundLongitude
                    • Decimal: 12.35756578966334
                  • eastBoundLongitude
                    • Decimal: 12.550169854604746
                  • southBoundLatitude
                    • Decimal: 50.5559371301353
                  • northBoundLatitude
                    • Decimal: 50.63047562722225
          • extent
            • EX_Extent
              • description
                • CharacterString: Niederbobritzsch Massif (NBZ)
              • geographicElement
                • EX_GeographicBoundingBox
                  • westBoundLongitude
                    • Decimal: 13.39425324886247
                  • eastBoundLongitude
                    • Decimal: 13.452274794272626
                  • southBoundLatitude
                    • Decimal: 50.886629350051386
                  • northBoundLatitude
                    • Decimal: 50.93025129573137
      • distributionInfo
        • MD_Distribution
          • transferOptions
            • MD_DigitalTransferOptions
              • onLine
                • CI_OnlineResource
                  • linkage
                    • URL: http://dx.doi.org/doi:10.5880/GFZ.4.8.2019.001
                  • protocol
                    • CharacterString: WWW:LINK-1.0-http--link
                  • name
                    • CharacterString: Download
                  • description
                    • CharacterString: Download
                  • function
                    • CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode_download): download
  • datacite:  /  download xml
    • resource (xsi:schemaLocation=http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4/metadata.xsd)
      • identifier (identifierType=DOI): 10.5880/GFZ.4.8.2019.001
      • creators
        • creator
          • creatorName: Förster, Hans-Jürgen
          • givenName: Hans-Jürgen
          • familyName: Förster
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • titles
        • title (xml:lang=eng): Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany)
      • publisher: GFZ Data Services
      • publicationYear: 2019
      • subjects
        • subject: monazite
        • subject: xenotime
        • subject: zircon
        • subject: allanite
        • subject: mineral composition
        • subject: magma differentiation
        • subject: electron-microprobe analysis
        • subject: rare earth elements
        • subject: Variscan orogeny
        • subject: late Carboniferous
        • subject: Erzgebirge-Vogtland
        • subject: multi-phase biotite-granite plutons
        • subject (schemeURI=http://gcmdservices.gsfc.nasa.gov/kms/concepts/concept_scheme/sciencekeywords subjectScheme=NASA/GCMD Earth Science Keywords xml:lang=en): EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS
        • subject (schemeURI=http://gcmdservices.gsfc.nasa.gov/kms/concepts/concept_scheme/sciencekeywords subjectScheme=NASA/GCMD Earth Science Keywords xml:lang=en): EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > IGNEOUS ROCKS
        • subject (schemeURI=http://gcmdservices.gsfc.nasa.gov/kms/concepts/concept_scheme/sciencekeywords subjectScheme=NASA/GCMD Earth Science Keywords xml:lang=en): EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > MINERALS
      • contributors
        • contributor (contributorType=Other)
          • contributorName: Rhede, Dieter
          • givenName: Dieter
          • familyName: Rhede
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
        • contributor (contributorType=Other)
          • contributorName: Appelt, Oona
          • givenName: Oona
          • familyName: Appelt
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • language: eng
      • resourceType (resourceTypeGeneral=Dataset): Dataset
      • relatedIdentifiers
        • relatedIdentifier (relatedIdentifierType=URL relationType=References): http://www.minsocam.org/ammin/AM60/AM60_599.pdf
        • relatedIdentifier (relatedIdentifierType=DOI relationType=References): 10.1016/0016-7037(89)90286-X
        • relatedIdentifier (relatedIdentifierType=URL relationType=IsDocumentedBy): http://www.minsocam.org/msa/AmMin/TOC/Articles_Free/1998/Forster_p1302-1315_98.pdf
        • relatedIdentifier (relatedIdentifierType=URL relationType=IsDocumentedBy): http://www.minsocam.org/msa/AmMin/TOC/Articles_Free/1998/Forster_p259-272_98.pdf
        • relatedIdentifier (relatedIdentifierType=DOI relationType=IsDocumentedBy): 10.1093/petroj/40.11.1613
        • relatedIdentifier (relatedIdentifierType=DOI relationType=References): 10.1016/0009-2541(72)90016-2
        • relatedIdentifier (relatedIdentifierType=DOI relationType=References): 10.1111/j.1751-908X.1991.tb00115.x
      • sizes
        • size: 3 Files
      • formats
        • format: application/octet-stream
        • format: application/octet-stream
        • format: application/octet-stream
      • rightsList
        • rights (rightsURI=http://creativecommons.org/licenses/by/4.0/): CC BY 4.0
      • descriptions
        • description (descriptionType=Abstract)
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
      • geoLocations
        • geoLocation
          • geoLocationBox
            • westBoundLongitude: 12.35756578966334
            • eastBoundLongitude: 12.550169854604746
            • southBoundLatitude: 50.5559371301353
            • northBoundLatitude: 50.63047562722225
          • geoLocationPlace: Kirchberg Massif (KIB)
        • geoLocation
          • geoLocationBox
            • westBoundLongitude: 13.39425324886247
            • eastBoundLongitude: 13.452274794272626
            • southBoundLatitude: 50.886629350051386
            • northBoundLatitude: 50.93025129573137
          • geoLocationPlace: Niederbobritzsch Massif (NBZ)
  • dif:  /  download xml
    • DIF (xsi:schemaLocation=http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.nasa.gov/Aboutus/xml/dif/dif_v9.8.2.xsd)
      • Entry_ID: 10.5880/GFZ.4.8.2019.001
      • Entry_Title: Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany)
      • Data_Set_Citation
        • Dataset_Creator: Förster, Hans-Jürgen
        • Dataset_Title: Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany)
        • Dataset_Release_Date: 2019
        • Dataset_Release_Place: Potsdam, Germany
        • Dataset_Publisher: GFZ Data Services
        • Online_Resource: http://dx.doi.org/10.5880/GFZ.4.8.2019.001
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: ROCKS/MINERALS/CRYSTALS
        • Variable_Level_1: ELEMENTS
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: ROCKS/MINERALS/CRYSTALS
        • Variable_Level_1: IGNEOUS ROCKS
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: ROCKS/MINERALS/CRYSTALS
        • Variable_Level_1: MINERALS
      • ISO_Topic_Category: geoscientificInformation
      • Keyword: monazite
      • Keyword: xenotime
      • Keyword: zircon
      • Keyword: allanite
      • Keyword: mineral composition
      • Keyword: magma differentiation
      • Keyword: electron-microprobe analysis
      • Keyword: rare earth elements
      • Keyword: Variscan orogeny
      • Keyword: late Carboniferous
      • Keyword: Erzgebirge-Vogtland
      • Keyword: multi-phase biotite-granite plutons
      • Spatial_Coverage
        • Southernmost_Latitude: 50.5559371301353
        • Northernmost_Latitude: 50.63047562722225
        • Westernmost_Longitude: 12.35756578966334
        • Easternmost_Longitude: 12.550169854604746
      • Spatial_Coverage
        • Southernmost_Latitude: 50.886629350051386
        • Northernmost_Latitude: 50.93025129573137
        • Westernmost_Longitude: 13.39425324886247
        • Easternmost_Longitude: 13.452274794272626
      • Data_Center
        • Data_Center_Name
          • Short_Name: Deutsches GeoForschungsZentrum GFZ
          • Long_Name: GFZ
        • Personnel
          • Role: DATA CENTER CONTACT
          • Last_Name: Deutsches GeoForschungsZentrum GFZ
      • Summary
        • Abstract: This data set is the 4th contribution of a series reporting chemical data for accessory minerals from felsic igneous rocks. It deals with two late Variscan biotite-granite massifs emplaced in the Saxothuringian Zone of the Variscan Orogen (Erzgebirge−Vogtland metallogenic province) in Germany. Mineral compositions were measured by electron-microprobe on surface rocks and borehole samples. The data set assembles the results of electron-microprobe spot analyses of primary and secondary allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-phase biotite-granite plutons of Kirchberg (KIB, Western Erzgebirge) and Niederbobritzsch (NBZ, Eastern Erzgebirge). Both plutons comprise several, compositionally and texturally distinct sub-intrusions, contain locally centimeter- to decimeter-sized co-genetic enclaves and xenoliths, and are cross-cut by chemically distinct, fine-grained aplitic dikes. These late-Variscan (c. 325 Ma) granites are moderately to highly evolved and (not considering enclaves) span the SiO2-range (in wt%) 67.0-77.4 (KIB) and 66.8-76.2 (NBZ). The granites are weakly peraluminous (A/CNK = 1.04−1.11 for KIB and 0.99-1.10 for NBZ) and of transitional I−S-type affinity. Formation of primary allanite-(Ce) was restricted to the least-evolved subintrusions KIB1 and NBZ1 of both massifs. All other granites contain monazite-(Ce) as predominant LREE host. Magmatic allanite-(Ce) is variably altered and characterized by totals <100 wt%, implying the presence of several wt% water in the structure. Synchysite-(Ce) constitutes one of its alteration minerals. The Kirchberg massif hosts a second sub-facies of KIB1 that contains monazite instead of allanite as primary species. Severe alteration of this granite facies gave rise to partial or complete dissolution of part of the monazite accompanied by formation of allanite-epidote solid solutions as alteration product. Monazite-(Ce) displays large variations in Th versus REE concentrations even at thin-section scale. Incorporation of Th is mainly governed by the huttonite substitution Th^4+ + Si^4+ = REE^3+ + P^5+. Thorium concentrations span the range 1.33 – 41.8 wt.% ThO2. Xenotime-(Y) does not occur in KBI1 and NBZ1, but crystallized in all other subintrusions. Notable is the predominance of the heaviest REE Er-Lu (normalized to chondrite). The data set contains the complete pile of electron-microprobe analyses for the four accessory minerals allanite-(Ce) (ALLA-KIB-NBZ2019), monazite-(Ce) (MONA-KIB-NBZ2019), xenotime-(Y) (XENO-KIB-NBZ2019) and zircon (ZIRC-KIB-NBZ2019). All tables are presented as Excel (xlsx) and machine-readable csv formats. The content of the tables and further data description are given in the data description file, together with BSE images of primary and secondary allanite-(Ce) from the KIB1 subintrusion.
      • Metadata_Name: DIF
      • Metadata_Version: 9.8.2
  • escidoc:  /  download xml
    • resource
      • title (xml:lang=eng): Accessory Minerals in Felsic Igneous Rocks - Part 4: Composition of allanite-(Ce), monazite-(Ce), xenotime-(Y) and zircon from the multi-stage, weakly peraluminous F-poor granite massifs of Kirchberg and Niederbobritzsch (Erzgebirge−Vogtland metallogenic province, Germany)
      • creator
        • creatorName: Förster, Hans-Jürgen
        • givenName: Hans-Jürgen
        • familyName: Förster
        • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany

Location

Click/hover over markers or bounding boxes to see related details. Click/hover over details to see related marker or bounding box.

    Files

    License

    CC BY 4.0