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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
1 Documentation
    2008-12-31
1 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
    2008-11-12
1 Library of Congress Subject Headings Library of Congress Subject Headings
    1 NASA/GCMD Data Center Keywords NASA/GCMD Data Center Keywords
      2015-03-01
      1995-04-24
    1 NASA/GCMD Instrument Keywords NASA/GCMD Instrument Keywords
      2015-03-01
      1995-04-24
    1 NASA/GCMD Location Keywords NASA/GCMD Location Keywords
      2015-03-01
      1995-04-24
    1 NASA/GCMD Platform Keywords NASA/GCMD Platform Keywords
      2015-03-01
      1995-04-24
    1 NASA/GCMD Project Keywords NASA/GCMD Project Keywords
      2015-03-01
      1995-04-24
    1 NASA/GCMD Science Keywords NASA/GCMD Science Keywords
      2015-03-01
      1995-04-24
    1 NASA/Global Change Master Directory (GCMD) Platform Keywords NASA/Global Change Master Directory (GCMD) Platform Keywords
      2008-02-05
    1 NOAA/NCEI Marine Geology WAF
      2015-10-05
    NOAA/NCEI Marine Geology WAF
    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
      8 GCMD Valids http://gcmd.nasa.gov/learn/keyword_list.html
      1 Carmen Gaina Center for Geodynamics, Geological Survey of Norway, Trondheim, Norway originator
      1 NCEI (publisher) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher
      1 Marine Geology Data Manager - distributor - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Data Manager geology.info@noaa.gov distributor
      1 EarthByte Group, School of Geosciences, University of Sydney, Australia publisher
      1 European Petroleum Survey Group http://www.epsg-registry.org/
      1 Maria Sdrolias EarthByte Group, School of Geosciences, University of Sydney, Australia originator
      2 pointOfContact - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Marine Geology Data Manager DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Marine Geology Data Manager geology.info@noaa.gov pointOfContact
      1 custodian - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Marine Geology Data Manager DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Marine Geology Data Manager geology.info@noaa.gov custodian
      7 GCMD User Support Office NASA GCMD User Support Office gcmduso@gcmd.gsfc.nasa.gov publisher http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso
      1 National Centers for Environmental Information, NOAA author
      1 R. Dietmar Muller School of Geosciences, University of Sydney, Australia originator
      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
      1 Walter R. Roest Departement Geosciences Marines, Plouzane, France originator
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      CI_OnlineResource

      Count Component Linkage Name Description Function
      7 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
      7 http://gcmd.nasa.gov/learn/keyword_list.html GCMD's Science Keywords and Associated Directory Keywords This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions. information
      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.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html http://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
      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/harvest/850a876a-3f44-456f-9599-430b9b10b34d Marine geology data sets in data.noaa.gov from NOAA/NCEI More marine geology data sets in data.noaa.gov stewarded by NOAA/NCEI. search
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      MD_Identifier or RS_Identifier

      Count Component Code
      1 In Situ Ocean-based Platforms > SHIPS
      1 In Situ/Laboratory Instruments
      2 NOAA/NCEI Marine Geology WAF
      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[1]/gmd:DQ_DataQuality[1]/gmd:scope[1]/gmd:DQ_Scope[1]/gmd:extent[1]
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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 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 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 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[1]/gmi:MI_AcquisitionInformation[1]/gmi:platform[1]
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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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