{"xmlId":"2477","NOAAStudyId":"5809","studyName":"Ziegler and Murray 2007 Central Pacific ODP1215 Cenozoic Elemental Concentration Data","doi":"https://doi.org/10.25921/g6x8-6f26","uuid":"f96eff25-c4c0-4320-9ac0-34277cf11b78","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site."},"dataType":"PALEOCEANOGRAPHY","investigators":"Ziegler, C.L.; Murray, R.W.","investigatorDetails":[{"firstName":"Christa","lastName":"Ziegler","initials":"C.L.","orcId":null},{"firstName":"Richard","lastName":"Murray","initials":"R.W.","orcId":"0000-0002-7688-4098"}],"version":"1.0","funding":[],"studyNotes":null,"onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/5809","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-5809.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-ocean-5809.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography","studyCode":null,"scienceKeywords":null,"reconstruction":"N","contributionDate":"2007-04-30","entryId":"noaa-ocean-5809","earliestYearBP":56000000,"mostRecentYearBP":0,"earliestYearCE":-55998050,"mostRecentYearCE":1950,"publication":[{"author":{"name":"Ziegler, C. L., and R. W. Murray"},"pubYear":2007,"title":"Geochemical evolution of the central Pacific Ocean over the past 56 Myr","journal":"Paleoceanography","volume":"22","edition":null,"issue":"2","pages":null,"reportNumber":"PA2203","citation":"Ziegler, C. L., and R. W. Murray. 2007. Geochemical evolution of the central Pacific Ocean over the past 56 Myr. Paleoceanography, 22(2), PA2203. doi: 10.1029/2006PA001321","type":"publication","identifier":{"type":"doi","id":"10.1029/2006PA001321","url":"http://dx.doi.org/10.1029/2006PA001321"},"abstract":"We measured the elemental concentrations of 69 sediment samples collected at Ocean Drilling Program Site 1215 and employed a suite of statistical methods and elemental ratios to quantify the lithogenic, biogenic, and authigenic/hydrogenous/hydrothermal (AHH) components. We show that the changes in their abundance record (1) northwestward migration of the Pacific Plate, (2) changes in climatic and oceanographic processes associated with the transition from the Eocene greenhouse into the Oligocene icehouse, and (3) changes in Pacific spreading rates and plate reorganization. The distributions of three separate lithogenic end-members depend on the latitudinal positioning of the site underneath the different wind belts. Locations north of 22°N received material from Asia, which was transported to the central Pacific via the westerlies. Locations between 20° and 22°N display a silicic volcanic composition and may reflect the boundary between westerlies and northeast trade winds. Locations south of 20°N are geochemically (e.g., Cr/Ta, Sc/Th, etc.) distinct from locations north of 22°N and suggest a North American origin. Rb/Sc significantly increases from values of 2.8 g g1 at <2022 Ma to 5.7 g g1 in the modern, recording the development of the east Asian monsoon and formation of Asian loess. During the early to mid-Eocene (5354 Ma), when Site 1215 was located at <11°13°N and was above the carbonate compensation depth, export production increased by 4055% and was <25% greater than the modern value at 9°N. The AHH component dominated from late Eocene to the late Miocene and during the late Eocene may have been driven by elevated hydrothermal activity during increased seafloor spreading.","pubRank":"1"}],"site":[{"NOAASiteId":"57060","siteName":"ODP 1215","siteCode":null,"mappable":"Y","locationName":"Ocean>Pacific Ocean>North Pacific Ocean","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["26","-147.5"]},"properties":{"southernmostLatitude":"26","northernmostLatitude":"26","westernmostLongitude":"-147.5","easternmostLongitude":"-147.5","minElevationMeters":"-5396","maxElevationMeters":"-5396"}},"paleoData":[{"dataTableName":"ODP1215A element Ziegler07","NOAADataTableId":"32564","earliestYear":56000000,"mostRecentYear":0,"timeUnit":"cal yr 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