georefid:2007-124233SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.206.010.20072007-01-01publicationgeorefid:2007-124233doi:10.2973/odp.proc.sr.206.010.2007Cooper, Kari M.University of Washington, Department of Earth and Space Sciences, Seattle, WA, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Teagle, Damon A. H., Wilson, Douglas S., Acton, Gary D., Alt, Jeffrey C., Banerjee, Neil R., Barr, Samantha R., Coggon, Rosalind, Cooper, Kari M., Crispini, Laura, Einaudi, Florence, Jiang, Shijun, Kalberkamp, Ulrich, Kerneklian, Marcie J., Laverne, Christine, Nichols, Holly J., Sandwell, Rachel, Tartarotti, Paola, Umino, Susumu, Ziegler, Christa, Proceedings of the Ocean Drilling Program; volume 206; scientific results; an in situ section of the upper oceanic crust formed by superfast seafloor spreading; covering Leg 206 of the cruises of the drilling vessel JOIDES Resolution; Balboa, Panama to Balboa, Panama; Site 1256; 6 November 2002-4 January 2003206In this report, I present trace element data for basement samples at Ocean Drilling Program (ODP) Site 1256. The samples analyzed represent a subset of the group ("pool") samples from ODP Leg 206, and these trace element data are part of a more comprehensive data suite for the same samples, with analyses of stable and radiogenic isotopes (e.g., Sr, Li, and O) in progress or recently completed that will be presented elsewhere. The trace element analyses were performed in the GeoAnalytical Lab at Washington State University. The following elements were analyzed: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ba, Th, Nb, Y, Hf, Ta, U, Pb, Rb, Cs, Sr, Sc, and Zr. Trace element data indicate that the igneous basement at Site 1256 is geochemically normal midocean-ridge basalt. A massive ponded flow sampled in both Holes 1256C and 1256D is distinguished by higher abundances of rare earth elements (REE) and most of the other trace elements analyzed. One interval of highly altered basalt has significantly higher concentrations of Cs, Rb, and Ba and lower concentrations of Sr, Pb, Zr, Hf, Sc, and most REE than the samples of background alteration or halos. No correlation is obvious between trace element abundance and macroscopic type of alteration within the background alteration or halos.completedIgneous and metamorphic petrologyGeochemistry of rocks, soils, and sedimentsbasaltsbasementboreholeschemical ratiosconcentrationcorescrustEast PacificEast Pacific RiseEquatorial PacificgeochemistryGuatemala Basinigneous rocksLeg 206metalsmid-ocean ridge basaltsNorth PacificNortheast PacificOcean Drilling Programoceanic crustODP Site 1256Pacific Oceanrare earthsspatial variationstrace elementstrace metalsvolcanic rockswhole rockurn:org.iodp:exp:206urnlargerWorkCitationcampaignurn:org.iodp:exp:206:site:1256urnlargerWorkCitationstudyurn:org.iodp:exp:206urnlargerWorkCitationcampaignEnglishgeoscientificInformation-91.5600-91.56006.44006.4400application/pdfunknownSEDIS Publication Catalogue

ana.macario@awi.de

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