Age, spreading rates, and spreading asymmetry of the world's ocean crust | spatialRepresentationInfo|
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(MI_Metadata) fileIdentifier: gov.noaa.ngdc.mgg.geology:G04150 hierarchyLevel: (MD_ScopeCode) dataset contact: (CI_ResponsibleParty) organisationName: NOAA National Centers for Environmental Information contactInfo: (CI_Contact) address: (CI_Address) electronicMailAddress: ncei.info@noaa.gov onlineResource: (CI_OnlineResource) linkage: https://www.ncei.noaa.gov/contact name: NCEI Contact Information description: Information for contacts at NCEI. function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) pointOfContact dateStamp: 2020-04-21 metadataStandardName: ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data metadataStandardVersion: ISO 19115-2:2009(E) return to top spatialRepresentationInfo: (MD_VectorSpatialRepresentation) geometricObjects: (MD_GeometricObjects) geometricObjectType: (MD_GeometricObjectTypeCode) point return to top referenceSystemInfo: (MD_ReferenceSystem) referenceSystemIdentifier: (RS_Identifier) authority: (CI_Citation) title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry date: (CI_Date) date: 2008-11-12 dateType: (CI_DateTypeCode) publication citedResponsibleParty: (CI_ResponsibleParty) organisationName: European Petroleum Survey Group contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: http://www.epsg-registry.org/ name: European Petroleum Survey Group Geodetic Parameter Dataset description: Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. function: (CI_OnLineFunctionCode) search role: (inapplicable) code: urn:ogc:def:crs:EPSG:4326 version: 6.18.3 return to top identificationInfo: (MD_DataIdentification) citation: (CI_Citation) title: Age, spreading rates, and spreading asymmetry of the world's ocean crust date: (CI_Date) date: 2008-12-31 dateType: (CI_DateTypeCode) publication date: (CI_Date) date: 2008-12-31 dateType: (CI_DateTypeCode) revision edition: 1 identifier: (MD_Identifier) authority: (CI_Citation) title: International DOI Foundation (IDF) date: (inapplicable) code: Anchor: DOI doi:10.1029/2007GC001743 identifier: (MD_Identifier) authority: (CI_Citation) title: NOAA National Centers for Environmental Information date: (inapplicable) code: NCEI Metadata ID: gov.noaa.ngdc.mgg.geology:G04150 citedResponsibleParty: (CI_ResponsibleParty) individualName: Muller, R.D. organisationName: School of Geosciences, University of Sydney, Australia role: (CI_RoleCode) author citedResponsibleParty: (CI_ResponsibleParty) individualName: Sdrolias, M. organisationName: EarthByte Group, School of Geosciences, University of Sydney, Australia role: (CI_RoleCode) author citedResponsibleParty: (CI_ResponsibleParty) individualName: Gaina, C. organisationName: Center for Geodynamics, Geological Survey of Norway, Trondheim, Norway role: (CI_RoleCode) author citedResponsibleParty: (CI_ResponsibleParty) individualName: Roest, W.R. organisationName: Departement Geosciences Marines, Plouzane, France role: (CI_RoleCode) author citedResponsibleParty: (CI_ResponsibleParty) organisationName: EarthByte Group, School of Geosciences, University of Sydney, Australia role: (CI_RoleCode) collaborator citedResponsibleParty: (CI_ResponsibleParty) organisationName: NOAA National Centers for Environmental Information role: (CI_RoleCode) publisher presentationForm: (CI_PresentationFormCode) tableDigital series: (CI_Series) name: Geochemistry, Geophysics, Geosystems issueIdentification: Volume 9, Issue 4, April 2008 otherCitationDetails: DOI:10.1029/2007GC001743 abstract: 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. purpose: Scientific Research credit: Cite as: Muller, R. D., M. Sdrolias, C. Gaina, and W. R. Roest (2008), Age, spreading rates, and spreading asymmetry of the world's ocean crust, Geochem. Geophys. 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It also provides information on how users can participate in the further development of the keywords. function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) custodian descriptiveKeywords: (MD_Keywords) keyword: SOLID EARTH > CRUST keyword: Geographic Region > Global Ocean keyword: Vertical Location >Sea Floor type: (MD_KeywordTypeCode) place thesaurusName: (CI_Citation) title: Global Change Master Directory (GCMD) Location Keywords date: (CI_Date) date: 2020-01-09 dateType: (CI_DateTypeCode) publication edition: 9.1 citedResponsibleParty: (CI_ResponsibleParty) organisationName: NASA Goddard Space Flight Center, Earth Science Data and Information System contactInfo: (CI_Contact) onlineResource: (CI_OnlineResource) linkage: https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords name: Global Change Master Directory (GCMD) Keywords description: 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. function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) custodian resourceConstraints: (MD_LegalConstraints) accessConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. resourceConstraints: (MD_LegalConstraints) useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. resourceConstraints: (MD_LegalConstraints) accessConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: Access to this dataset is unrestricted. resourceConstraints: (MD_LegalConstraints) useLimitation: (MD_RestrictionCode) otherRestrictions otherConstraints: Cite as: Muller, R.D.; Sdrolias, M.; Gaina, C.; Roest, W.R.; 2008: Age, spreading rates, and spreading asymmetry of the world's ocean crust. NOAA National Centers for Environmental Information. https://doi.org/10.1029/2007GC001743. Accessed [date]. resourceConstraints: (MD_Constraints) useLimitation: Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States. resourceConstraints: (MD_LegalConstraints) useConstraints: (MD_RestrictionCode) otherRestrictions otherConstraints: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. 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Version 3 (posted 9/25/2008) contains the following changes: 1) Spreading asymmetry for crust without a present day conjugate is included in this version of the grid due to several requests received by the authors.2) Adjustment to the location of chron M25 in the westernmost Pacific (Pacific-Izanagi) and to the age assigned to the Pacific triangle.3) Minor COB modifications around back-arc basins to minimise over-interpolation artifacts from the adjacent subducting ocean floor.4) A gridding artifact in the Bay of Bengal, eastern India and in the southern Indian Ocean, east of the Enderby Basin was fixed.5) Inclusion of the Komandorsky Basin and Bering Sea, North Pacific. return to top contentInfo: (MI_CoverageDescription) attributeDescription: RecordType: digital model of age, age uncertainty, spreading rate, and spreading asymmetries contentType: (MD_CoverageContentTypeCode) grid dimension: (MD_Band) sequenceIdentifier: MemberName: aName: gridded age attributeType: (unknown) descriptor: 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. maxValue: (unknown) minValue: (unknown) units: (unknown) dimension: (MD_Band) sequenceIdentifier: MemberName: aName: gridded age uncertainty attributeType: (unknown) descriptor: 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. maxValue: (unknown) minValue: (unknown) units: (unknown) dimension: (MD_Band) sequenceIdentifier: MemberName: aName: gridded spreading rate attributeType: (unknown) descriptor: Rate of accretion of ocean crust. maxValue: (unknown) minValue: (unknown) units: (unknown) dimension: (MD_Band) sequenceIdentifier: MemberName: aName: gridded spreading asymmetries attributeType: (unknown) descriptor: Asymmetries in crustal accretion appear to be frequently related to asthenospheric flow from mantle plumes to spreading ridges, resulting in ridge jumps towards hotspots. maxValue: (unknown) minValue: (unknown) units: (unknown) return to top contentInfo: (MD_FeatureCatalogueDescription) complianceCode: false includedWithDataset: true featureTypes: LocalName: featureCatalogueCitation: (CI_Citation) title: Documentation date: (CI_Date) date: 2008-12-31 dateType: (CI_DateTypeCode) creation otherCitationDetails: Entities and attributes are completely described in a text file accompanying the dataset on download. return to top distributionInfo: (MD_Distribution) distributor: (MD_Distributor) distributorContact: (CI_ResponsibleParty) organisationName: NOAA National Centers for Environmental Information contactInfo: (CI_Contact) address: (CI_Address) electronicMailAddress: ncei.info@noaa.gov onlineResource: (CI_OnlineResource) linkage: https://www.ncei.noaa.gov/contact name: NCEI Contact Information description: Information for contacts at NCEI. function: (CI_OnLineFunctionCode) information role: (CI_RoleCode) distributor distributionOrderProcess: (MD_StandardOrderProcess) fees: In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. orderingInstructions: Contact NCEI for other distribution options and instructions. distributorFormat: (MD_Format) name: ASCII version: UTF-8 specification: American Standard Code for Information Interchange (ASCII) text format. distributorTransferOptions: (MD_DigitalTransferOptions) onLine: (CI_OnlineResource) linkage: https://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html protocol: WWW:LINK-1.0-http--link applicationProfile: Web Browser name: https://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html description: NGDC Web page of information about the data set with links to download data and documentation from NCEI. function: (CI_OnLineFunctionCode) information distributorTransferOptions: (MD_DigitalTransferOptions) onLine: (CI_OnlineResource) linkage: http://www.earthbyte.org/Resources/agegrid2008.html protocol: WWW:LINK-1.0-http--link applicationProfile: Web Browser name: http://www.earthbyte.org/Resources/agegrid2008.html description: Alternate download from the originator. function: (CI_OnLineFunctionCode) download return to top dataQualityInfo: (DQ_DataQuality) scope: (DQ_Scope) level: (MD_ScopeCode) dataset extent: #boundingExtent levelDescription: (MD_ScopeDescription) dataset: gov.noaa.ngdc.mgg.geology:G04150 report: (DQ_AbsoluteExternalPositionalAccuracy) nameOfMeasure: Horizontal Positional Accuracy measureDescription: (unknown) evaluationMethodDescription: The horizontal accuracy of data values is unknown. result: (unknown) report: (DQ_QuantitativeAttributeAccuracy) nameOfMeasure: Reliability measureDescription: no quality control measures were performed by NCEI. evaluationMethodDescription: Quality control was performed by the originator. result: (unknown) lineage: (LI_Lineage) statement: lineage prior to transfer to NCEI is unknown. processStep: (LI_ProcessStep) description: Received data from originator dateTime: DateTime: 2008-12-31T00:00:00 source: (LI_Source) description: Dietmar Muller return to top dataQualityInfo: (DQ_DataQuality) scope: (DQ_Scope) level: (MD_ScopeCode) repository levelDescription: (MD_ScopeDescription) other: NOAA National Centers for Environmental Information lineage: (LI_Lineage) processStep: (LE_ProcessStep) description: 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. dateTime: DateTime: 2015-04-22T00:00:00 return to top metadataMaintenance: (MD_MaintenanceInformation) maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded maintenanceNote: Modified for compliance to NCEI Template v1.2. return to top acquisitionInformation: (MI_AcquisitionInformation) instrument: (MI_Instrument) identifier: (MD_Identifier) code: In Situ/Laboratory Instruments type: instrument description: Instrument Type: Sea floor and lakebed geologic sampling (coring, drilling, dredging, trawling, and/or grab sampling devices) and/or in situ measurements (cameras, visual observations, and/or recorders/loggers) platform: (MI_Platform) identifier: (MD_Identifier) code: In Situ Ocean-based Platforms > SHIPS description: Various ocean-based and lake-based ships, boats, remotely operated vehicles, submersibles, and other unspecified types of platforms instrument: (inapplicable) |