Cooper, Kari M. (2007): Data report; Trace element analyses in whole-rock basement samples, Site 1256, ODP Leg 206

Leg/Site/Hole:
ODP 206
ODP 206 1256
Identifier:
2007-124233
georefid

10.2973/odp.proc.sr.206.010.2007
doi

Creator:
Cooper, Kari M.
University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States
author

Identification:
Data report; Trace element analyses in whole-rock basement samples, Site 1256, ODP Leg 206
2007
In: 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 2003
Texas A&M University, Ocean Drilling Program, College Station, TX, United States
206
In 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.
English
Coverage:Geographic coordinates:
North:6.4400
West:-91.5600East: -91.5600
South:6.4400

Igneous and metamorphic petrology; Geochemistry of rocks, soils, and sediments; basalts; basement; boreholes; chemical ratios; concentration; cores; crust; East Pacific; East Pacific Rise; Equatorial Pacific; geochemistry; Guatemala Basin; igneous rocks; Leg 206; metals; mid-ocean ridge basalts; North Pacific; Northeast Pacific; Ocean Drilling Program; oceanic crust; ODP Site 1256; Pacific Ocean; rare earths; spatial variations; trace elements; trace metals; volcanic rocks; whole rock;

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