3D microXCT scans of 1mm pumiceous clasts from Rungwe Pumice eruption deposit (Tanzania)

Cite as:

Cappelli, Lorenzo; Buono, Gianmarco; Pappalardo, Lucia; Fontijn, Karen; Ernst, Gerald G.J.; van Gerve, Thomas; Namur, Olivier; Sielenou, Vanessa N.; Mbede, Evelyne; Edista, Abdallah; Kwelwa, Shimba (2025): 3D microXCT scans of 1mm pumiceous clasts from Rungwe Pumice eruption deposit (Tanzania). GFZ Data Services. https://doi.org/10.5880/fidgeo.2025.023

Status

I N R E V I E W : Cappelli, Lorenzo; Buono, Gianmarco; Pappalardo, Lucia; Fontijn, Karen; Ernst, Gerald G.J.; van Gerve, Thomas; Namur, Olivier; Sielenou, Vanessa N.; Mbede, Evelyne; Edista, Abdallah; Kwelwa, Shimba (2025): 3D microXCT scans of 1mm pumiceous clasts from Rungwe Pumice eruption deposit (Tanzania). GFZ Data Services. https://doi.org/10.5880/fidgeo.2025.023

Abstract

The dataset comprises 3D micro XCT scans collected with a ZEISS Xradia Versa 410 at the Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Vesuviano (Italy). Samples are ash particles within the 0/-0.5 φ (1-1.4 mm) grain size range collected from different stratigraphic horizons (C, F, I, L, O) of the type section (KF176) of the 4ka Rungwe Pumice Plinian eruption (Tanzania). A total of 4001 bidimensional X-ray absorption projections were collected during a 360° rotation of the sample at 80 kV and 7 W. For each sample a scan was collected using a 10x magnification lens, additionally, for specific samples, a further scan with a 20x lens was also collected at 150 kV and 10 W. The pixel size results in 2 µm/px (8 µm^3/voxel) for samples scanned with 10x lens and 1.1 µm/px (1.3 µm^3/voxel ) for samples scanned with 20x lens. When necessary, a low-energy (LE1) filter was used to minimise beam hardening. The scans were then reconstructed into tomographic volumes using the integrated XRM Reconstructor software.

Authors

Cappelli, Lorenzo;Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, 1050, Belgium
Buono, Gianmarco;Istituto Nazionale di Geofisica e Vulcanologia, Italy
Pappalardo, Lucia;Istituto Nazionale di Geofisica e Vulcanologia, Italy
Fontijn, Karen;Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, Belgium
Ernst, Gerald G.J.
van Gerve, Thomas;Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium
Namur, Olivier;Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium
Sielenou, Vanessa N.;Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, Belgium
Mbede, Evelyne;School of Mines and Geosciences; University of Dar es Salaam; Dar es Salaam, Tanzania
Edista, Abdallah;School of Mines and Geosciences; University of Dar es Salaam; Dar es Salaam, Tanzania
Kwelwa, Shimba;AngloGold Ashanti, Tanzania

Contact

Cappelli, Lorenzo (PhD); Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, 1050, Belgium;

Contributors

Micro-CT laboratory (INGV, Italy)

Funders

European Commission: Horizon Europe - EXCITE 2 TNA (101005611 and 101131765)

Keywords

Rungwe Pumice eruption, Pyroclastic textures, Plinian eruption, Vesicle textures, EPOS, multi-scale laboratories, geochemistry and microscopy, geochemistry data, compound material > rock > igneous rock > fragmental igneous rock > pyroclastic rock > ash tuff lapillistone and lapilli tuff, compound material > rock > igneous rock > glass rich igneous rock > glassy igneous rock

GCMD Science Keywords

More Metadata

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  - publisher: GFZ Data Services
  - publicationYear: 2025
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    - subject: Pyroclastic textures
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    - subject: Vesicle textures
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    - subject: geochemistry and microscopy
    - subject: geochemistry data
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    - subject (subjectScheme=CGI Simple Lithology): compound material > rock > igneous rock > glass rich igneous rock > glassy igneous rock
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    - subject (subjectScheme=NASA/GCMD Earth Science Keywords): EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > ASH/DUST COMPOSITION
    - subject (subjectScheme=NASA/GCMD Earth Science Keywords): EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > MAGMA COMPOSITION/TEXTURE
    - subject (subjectScheme=NASA/GCMD Earth Science Keywords): EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > MAGMA SPEED/FLOW
    - subject (subjectScheme=NASA/GCMD Earth Science Keywords): EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > PYROCLASTICS COMPOSITION/TEXTURE
    - subject (subjectScheme=NASA/GCMD Earth Science Keywords): EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > VOLCANIC EXPLOSIVITY
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        CharacterString: The dataset comprises 3D micro XCT scans collected with a ZEISS Xradia Versa 410 at the Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Vesuviano (Italy). Samples are ash particles within the 0/-0.5 φ (1-1.4 mm) grain size range collected from different stratigraphic horizons (C, F, I, L, O) of the type section (KF176) of the 4ka Rungwe Pumice Plinian eruption (Tanzania). A total of 4001 bidimensional X-ray absorption projections were collected during a 360° rotation of the sample at 80 kV and 7 W. For each sample a scan was collected using a 10x magnification lens, additionally, for specific samples, a further scan with a 20x lens was also collected at 150 kV and 10 W. The pixel size results in 2 µm/px (8 µm^3/voxel) for samples scanned with 10x lens and 1.1 µm/px (1.3 µm^3/voxel ) for samples scanned with 20x lens. When necessary, a low-energy (LE1) filter was used to minimise beam hardening. The scans were then reconstructed into tomographic volumes using the integrated XRM Reconstructor software.
      - pointOfContact
        CI_ResponsibleParty
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        CharacterString: Cappelli, Lorenzo
        organisationName
        CharacterString: Department of Geosciences, Environment and Society; Université libre de Bruxelles; Bruxelles, 1050, Belgium
        positionName
        CharacterString: PhD
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        CI_Contact
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        CI_Address
        electronicMailAddress
        CharacterString: cappellilorenzo93(_at_)gmail.com
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        CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=pointOfContact): pointOfContact
      - descriptiveKeywords
        MD_Keywords
        keyword
        CharacterString: Rungwe Pumice eruption
        keyword
        CharacterString: Pyroclastic textures
        keyword
        CharacterString: Plinian eruption
        keyword
        CharacterString: Vesicle textures
        keyword
        CharacterString: EPOS
        keyword
        CharacterString: multi-scale laboratories
        keyword
        CharacterString: geochemistry and microscopy
        keyword
        CharacterString: geochemistry data
      - descriptiveKeywords
        MD_Keywords
        keyword
        CharacterString: compound material > rock > igneous rock > fragmental igneous rock > pyroclastic rock > ash tuff lapillistone and lapilli tuff
        keyword
        CharacterString: compound material > rock > igneous rock > glass rich igneous rock > glassy igneous rock
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        CI_Citation
        title
        CharacterString: CGI Simple Lithology
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        CI_Date
        date (gco:nilReason=missing):
        dateType
        CI_DateTypeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode codeListValue=publication): publication
      - descriptiveKeywords
        MD_Keywords
        keyword
        CharacterString: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC LANDFORMS > VOLCANO
        keyword
        CharacterString: EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > ASH/DUST COMPOSITION
        keyword
        CharacterString: EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > MAGMA COMPOSITION/TEXTURE
        keyword
        CharacterString: EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > MAGMA SPEED/FLOW
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        CharacterString: EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > PYROCLASTICS COMPOSITION/TEXTURE
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        CharacterString: EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > VOLCANIC EXPLOSIVITY
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        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
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        MD_Constraints
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        CharacterString: CC BY 4.0
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        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: 10.31223/X5RB12
        codeSpace
        CharacterString: DOI
        associationType
        DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=IsSupplementTo): IsSupplementTo
      - aggregationInfo
        MD_AggregateInformation
        aggregateDataSetIdentifier
        RS_Identifier
        code
        CharacterString: 10.1016/j.jvolgeores.2010.07.021
        codeSpace
        CharacterString: DOI
        associationType
        DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=Cites): Cites
      - aggregationInfo
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        RS_Identifier
        code
        CharacterString: 10.1007/s00445-011-0486-8
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        CharacterString: DOI
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        DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=Cites): Cites
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        CharacterString: eng
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      - extent
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        description
        CharacterString: Location of the Rungwe Pumice type section KF176 sampled in 2008
        geographicElement
        EX_GeographicBoundingBox
        westBoundLongitude
        Decimal: 33.7169
        eastBoundLongitude
        Decimal: 33.7169
        southBoundLatitude
        Decimal: -9.20539
        northBoundLatitude
        Decimal: -9.20539
  - distributionInfo
    - MD_Distribution
      - transferOptions
        MD_DigitalTransferOptions
        onLine
        CI_OnlineResource
        linkage
        URL: http://doi.org/10.5880/fidgeo.2025.023
        protocol
        CharacterString: WWW:LINK-1.0-http--link
        name
        CharacterString: Data Access - DOI
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        CharacterString: Data Access - DOI
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        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_information): information
  - dataQualityInfo
    - DQ_DataQuality
      - scope
        DQ_Scope
        level
        MD_ScopeCode (codeListValue=dataset codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_ScopeCode):
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