{"data":{"id":"10.1594/pangaea.54717","type":"dois","attributes":{"doi":"10.1594/pangaea.54717","prefix":"10.1594","suffix":"pangaea.54717","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Bücker, Christian J","givenName":"Christian J","familyName":"Bücker","affiliation":[],"nameIdentifiers":[]},{"name":"Henrys, Stuart A","givenName":"Stuart A","familyName":"Henrys","nameIdentifiers":[{"schemeUri":"https://orcid.org","nameIdentifier":"https://orcid.org/0000-0002-7164-5274","nameIdentifierScheme":"ORCID"}],"affiliation":[]},{"name":"Wonik, Thomas","givenName":"Thomas","familyName":"Wonik","affiliation":[],"nameIdentifiers":[]}],"titles":[{"title":"Porosity and sound velocity measured in sediment core CIROS-1"}],"publisher":"PANGAEA","container":{},"publicationYear":1998,"subjects":[{"subject":"DEPTH, sediment/rock","subjectScheme":"Parameter"},{"subject":"Porosity","subjectScheme":"Parameter"},{"subject":"Velocity, compressional wave","subjectScheme":"Parameter"},{"subject":"Drilling/drill rig","subjectScheme":"Method"},{"subject":"Calculated","subjectScheme":"Method"},{"subject":"CIROS","subjectScheme":"Campaign"},{"subject":"Sampling/drilling ice","subjectScheme":"Basis"},{"subject":"Cape Roberts Project (CRP)","subjectScheme":"Project"}],"contributors":[],"dates":[{"date":"1998","dateType":"Issued"}],"language":"en","types":{"ris":"DATA","bibtex":"misc","citeproc":"dataset","schemaOrg":"Dataset","resourceType":"Supplementary Dataset","resourceTypeGeneral":"Dataset"},"relatedIdentifiers":[{"relationType":"IsSupplementTo","relatedIdentifier":"10013/epic.28339.d001","relatedIdentifierType":"Handle"}],"relatedItems":[],"sizes":["5366 data points"],"formats":["text/tab-separated-values"],"version":null,"rightsList":[{"rights":"Creative Commons Attribution 3.0 Unported","rightsUri":"https://creativecommons.org/licenses/by/3.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-3.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"The CIROS-1 drillhole, which in 1986 reached a depth of 700 m below the seafloor, is still the only deep hole that can provide information on the velocity structure of the upper crust in McMurdo Sound and the Ross Sea, Antarctica. A careful review and quality control of the downhole logging data of CIROS-1 resulted in a new porosity depth function that is consistent with porosity data from the MSSTS-1 and CRP-1 drillholes. Using existing porosity-velocity equations, it was possible for the first time to obtain reliable velocity information for the upper 700 m of strata off the Victoria Land coast. The calculated synthetic seismograms, based on downhole velocity and density data, fit very well with the existing seismic lines IT90A-71, PD90-12, and NBP9601-89. The quality of the correlation confirms that the average velocity of the top 700 m of strata is about 2 000-2 300 m/s, and not 2 800-3 000 m/s, as was previously assumed. In consequence, these distinctly lower velocities result in shallower depths for the seismic unconformities V3/V4 andV4/V5 and thus may have important implications for further drilling off Cape Roberts.","descriptionType":"Abstract"},{"description":"Supplement to: Bücker, Christian J; Henrys, Stuart A; Wonik, Thomas (1998): Revision of the Cenozoic seismic velocity structure of the CIROS-1 drillhole, Antarctica, and implications for further drilling off Cape Roberts. Terra Antartica, 5(3), 281-289","descriptionType":"Other"}],"geoLocations":[{"geoLocationPoint":{"pointLatitude":"-77.0818721666666","pointLongitude":"164.49886"}},{"geoLocationPlace":"Butter 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