@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00757592v1> a dcat:Dataset ;
    dct:description """
              Ocean Drilling Program Hole 1256D reached for the first time the transition zone between the sheeted dike complex and the uppermost gabbros. The recovered crustal section offers a unique opportunity to study the deepest part of the hydrothermal system in present-day oceanic crust. We present a structural analysis of electrical borehole wall images. We identified, and measured the orientations of four categories of structures: major faults, minor fractures, possibly hydrothermal veins, and dikes. All structures tend to strike parallel to the paleo-ridge axis. Three major fault zones (meter thick) and dikes are steeply dipping (~ 75° on average) outward the ridge. Centimeter-thick moderately conductive planar features are interpreted as hydrothermal veins, are organized in arrays of consistent spacing, thickness, and orientation, and are dipping about 15-20° toward the ridge. This structural pattern is interpreted as an on-axis paleohydrothermal circulation system, with vertical, dike-parallel fractures, and sub-horizontal high-temperature hydrothermal veins at the base of the sheeted dike, which was subsequently rotated ~ 15° westward around a ridge-parallel, sub-horizontal axis. This rotation can be caused by upper-crustal block rotation along a listric normal fault, and/or subsidence at the ridge axis.
            """ ;
    dct:identifier "hal-00757592" ;
    dct:issued "2026-06-03T23:36:13.359405"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-06-03T23:36:13.359411"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Structure of the hydrothermal root zone of the sheeted dikes in fast-spread oceanic crust : a core-log integration study of ODP hole 1256D, Eastern Equatorial Pacific" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00757592v1/resource/e4c8d79e-8d12-4b1f-985d-ef2d80ecf36e> ;
    dcat:keyword "dikes",
        "electrical-borehole-images-hydrothermal-system",
        "fractures",
        "hole-1256d",
        "infoeu-reposemanticsarticle",
        "iodp",
        "journal-articles",
        "mid-oceanic-ridge",
        "odp",
        "physphysphys-geo-phphysics-physicsphysics-physicsgeophysics-physicsgeo-ph",
        "sdemcgenvironmental-sciencesglobal-changes",
        "sdustugpsciences-of-the-universe-physicsearth-sciencesgeophysics-physicsgeo-ph",
        "upper-oceanic-crust-sheeted-dike-complex",
        "veins" ;
    dcat:landingPage <ISSN:%200391-2612> .

<ISSN:%200391-2612> a foaf:Document .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00757592v1/resource/e4c8d79e-8d12-4b1f-985d-ef2d80ecf36e> a dcat:Distribution ;
    dct:format "HTML" ;
    dct:issued "2026-06-03T23:36:13.373498"^^xsd:dateTime ;
    dct:modified "2026-06-03T23:36:13.310662"^^xsd:dateTime ;
    dct:title "Structure of the hydrothermal root zone of the sheeted dikes in fast-spread oceanic crust : a core-log integration study of ODP hole 1256D, Eastern Equatorial Pacific" ;
    dcat:accessURL <https://hal.science/hal-00757592> .

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