Metadata Identifier: gov.noaa.ngdc.mgg.geology:G04150

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Age, spreading rates, and spreading asymmetry of the world's ocean crust The authors present four companion digital models of the age, age uncertainty, spreading rates and spreading asymmetries of the world's ocean basins as geographic and Mercator grids with 2 minute resolution. The grids include data from all the major ocean basins as well as detailed reconstructions of back-arc basins. The age, spreading rate and asymmetry at each grid node is determined by linear interpolation between adjacent seafloor isochrons in the direction of spreading. Ages for ocean floor between the oldest identified magnetic anomalies and continental crust are interpolated by geological estimates of the ages of passive continental margin segments. The age uncertainties for grid cells coinciding with marine magnetic anomaly identifications, observed or rotated to their conjugate ridge flanks, are based on the difference between gridded age and observed age. The uncertainties are also a function of the distance of a given grid cell to the nearest age observation, and the proximity to fracture zones or other age discontinuities. Asymmetries in crustal accretion appear to be frequently related to asthenospheric flow from mantle plumes to spreading ridges, resulting in ridge jumps towards hotspots. The authors also use the new age grid to compute global residual basement depth grids from the difference between observed oceanic basement depth and predicted depth using two alternative age-depth relationships. The new set of grids helps to investigate prominent negative depth anomalies, which may be alternatively related to subducted slab material descending in the mantle or to asthenospheric flow. A combination of these digital grids and the associated relative and absolute plate motion model with seismic tomography and mantle convection model outputs represent a valuable set of tools to investigate geodynamic problems.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 Age, spreading rates, and spreading asymmetry of the world's ocean crust
    2008-12-31
    2008-12-31
doi:10.1029/2007GC001743
NCEI Metadata ID: gov.noaa.ngdc.mgg.geology:G04150
1 Documentation
    2008-12-31
1 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
    2008-11-12
1 GCMD Data Center Keywords Global Change Master Directory (GCMD) Data Center Keywords
    2020-01-09
1 GCMD Instrument Keywords Global Change Master Directory (GCMD) Instrument Keywords
    2020-01-09
1 GCMD Location Keywords Global Change Master Directory (GCMD) Location Keywords
    2020-01-09
1 GCMD Platform Keywords Global Change Master Directory (GCMD) Platform Keywords
    2020-01-09
1 GCMD Science Keywords Global Change Master Directory (GCMD) Science Keywords
    2020-01-09
1 International DOI Foundation (IDF)
    1 Library of Congress Subject Headings Library of Congress Subject Headings
      1 NOAA National Centers for Environmental Information
        1 NOAA/NCEI Marine Geology WAF
          2015-10-05
        1 SeaDataNet Common Vocabularies SeaDataNet Common Vocabularies
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          CI_Series

          Count Component Name Issue Identification Page
          1 Geochemistry, Geophysics, Geosystems Volume 9, Issue 4, April 2008
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          CI_ResponsibleParty

          Count Component Individual Organization Position Email Role Linkage
          1 https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/MGG/Geology/iso/
          1 EarthByte Group, School of Geosciences, University of Sydney, Australia collaborator
          1 European Petroleum Survey Group http://www.epsg-registry.org/
          1 Gaina, C. Center for Geodynamics, Geological Survey of Norway, Trondheim, Norway author
          1 Muller, R.D. School of Geosciences, University of Sydney, Australia author
          5 GCMD Landing Page NASA Goddard Space Flight Center, Earth Science Data and Information System custodian https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
          3 NCEI (pointOfContact) NOAA National Centers for Environmental Information ncei.info@noaa.gov pointOfContact https://www.ncei.noaa.gov/contact
          1 NOAA National Centers for Environmental Information publisher
          1 NOAA National Centers for Environmental Information author
          1 NCEI (distributor) NOAA National Centers for Environmental Information ncei.info@noaa.gov distributor https://www.ncei.noaa.gov/contact
          1 Roest, W.R. Departement Geosciences Marines, Plouzane, France author
          1 Sdrolias, M. EarthByte Group, School of Geosciences, University of Sydney, Australia author
          1 resourceProvider - SeaDataNet SeaDataNet resourceProvider http://www.seadatanet.org/Standards-Software/Common-Vocabularies
          1 resourceProvider - US Library of Congress US Library of Congress resourceProvider http://id.loc.gov/authorities/subjects
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          CI_OnlineResource

          Count Component Linkage Name Description Function
          1 http://id.loc.gov/authorities/subjects Library of Congress Subject Headings (LCSH) The Library of Congress Subject Headings (LCSH) are part of a Linked Data Service, actively maintained since 1898 to catalog materials held at the Library of Congress. information
          1 http://www.earthbyte.org/Resources/agegrid2008.html http://www.earthbyte.org/Resources/agegrid2008.html Alternate download from the originator. download
          1 http://www.epsg-registry.org/ European Petroleum Survey Group Geodetic Parameter Dataset Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search
          1 http://www.seadatanet.org/Standards-Software/Common-Vocabularies SeaDataNet Common Vocabularies The SeaDataNet Vocabulary Server is populated with lists describing a wide range of entities relevant to marine metadata and data such as parameters, sea area names, platform classes, instrument types, and so on. information
          1 https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/MGG/Geology/iso/ Marine geology metadata records. search
          5 https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information
          3 https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information
          1 https://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html https://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html NGDC Web page of information about the data set with links to download data and documentation from NCEI. information
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          MD_Identifier or RS_Identifier

          Count Component Code
          1 In Situ Ocean-based Platforms > SHIPS
          1 In Situ/Laboratory Instruments
          1 NCEI Metadata ID: gov.noaa.ngdc.mgg.geology:G04150
          1 doi:10.1029/2007GC001743
          1 urn:ogc:def:crs:EPSG:4326
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          EX_Extent

          Bounding Box Temporal Extent
          Count Component Description West East North South Start End
          1 Global sea floor -180.0 180.0 90.0 -90.0 2008-12-31 2008-12-31
          Unresolved Xlinks
          #boundingExtent at: gmi:MI_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:scope/gmd:DQ_Scope/gmd:extent
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          EX_GeographicBoundingBox

          Count Component West East North South
          1 -180.0 180.0 90.0 -90.0
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          EX_TemporalExtent

          Count Component Start End
          1 2008-12-31 2008-12-31
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          MD_Format

          Count Component Name Version specification
          1 ASCII UTF-8 American Standard Code for Information Interchange (ASCII) text format.
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          MD_Medium

          none found
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          MD_Constraints

          Count Component Use Limitation
          1 NCEI Copyright Statement Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
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          MD_ReferenceSystem

          Count Component Code Authority Title
          1 EPSG 4326 urn:ogc:def:crs:EPSG:4326 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
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          MD_GridSpatialRepresentation

          none found
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          MD_Georeferenceable or MI_Georeferenceable

          none found
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          MD_Georectified or MI_Georectified

          none found
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          MD_Dimension

          none found
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          MD_CoverageDescription or MI_CoverageDescription

          Count Component Attribute Description Content Type
          1 digital model of age, age uncertainty, spreading rate, and spreading asymmetries
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          MD_Band or MI_Band

          Count Component Identifier Descriptor
          1 gridded age Ages for ocean floor between the oldest identified magnetic anomalies and continental crust are interpolated by geological estimates of the ages of passive continental margin segments.
          1 gridded age uncertainty The age uncertainties for grid cells coinciding with marine magnetic anomaly identifications, observed or rotated to their conjugate ridge flanks, are based on the difference between gridded age and observed age. The uncertainties are also a function of the distance of a given grid cell to the nearest age observation, and the proximity to fracture zones or other age discontinuities.
          1 gridded spreading rate Rate of accretion of ocean crust.
          1 gridded spreading asymmetries Asymmetries in crustal accretion appear to be frequently related to asthenospheric flow from mantle plumes to spreading ridges, resulting in ridge jumps towards hotspots.
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          MI_RangeElementDescription

          none found
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          MD_AggregateInformation

          Count Component Title Code Association Type Code
          1 NOAA/NCEI Marine Geology WAF NOAA/NCEI Marine Geology WAF crossReference
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          LE_Source or LI_Source

          Count Component Title Date Description
          1 Unknown Dietmar Muller
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          LE_ProcessStep or LI_ProcessStep

          Count Component DateTime Description
          1 2008-12-31T00:00:00 Received data from originator
          1 2015-04-22T00:00:00 NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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          MI_Operation

          none found
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          MI_Platform

          Count Component Code Description
          1 In Situ Ocean-based Platforms > Ships In Situ Ocean-based Platforms > SHIPS Various ocean-based and lake-based ships, boats, remotely operated vehicles, submersibles, and other unspecified types of platforms
          Unresolved Xlinks
          In Situ Ocean-based Platforms > Ships at: gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:platform
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          MI_Instrument

          Count Component Code Type Description
          1 In Situ/Laboratory Instruments In Situ/Laboratory Instruments instrument
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