994 resultados para 199-1218B


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Vorbesitzer: Bernhard Rorbach; Bartholomaeusstift Frankfurt am Main

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1 Brief von Edith Kriss an Margot von Mendelssohn, 13.10.1943; 1 Brief von Margot von Mendelssohn an Max Horkheimer, 23.01.1944; 1 Brief von Max Horkheimer an Henryk Grossman, 10.04.1944; 1 Brief von Nevitt Sanford an Max Horkheimer, 21.01.1944; 2 Briefe zwischen Richard C. Rothschild und Frederick Pollock, 1944; 1 Brief von Frederick Pollock an das Registrar for Voting in New York Country, [1944]; 1 Brief von Theodor W. Adorno an Frederick Pollock, 07.06.1944;

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Vorbesitzer: Heinrich Anton Cornill-d'Orville (Exlibris im Vorderdeckel)

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Vorbesitzer: Familie von Holzhausen

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Distribution, size, mineral, and chemical compositions of ferromanganese micronodules (FMMNs) and chemical composition of host sediments were examined in a series of red clay samples with ages from Eocene to the present at Ocean Drilling Program Leg 199, Site 1216, south of the Molokai Fracture Zone in the Central Pacific Basin. The number of FMMNs changed drastically throughout the 40-m-long red clay intervals. FMMNs are abundant in the upper 9 m of core, decrease between 9 and 25 meters below seafloor (mbsf) with depth, and are very rare from 30 to 40 mbsf. Chemical composition of FMMNs showed high Mn/Fe ratios and Ni and Cu contents and a distinct positive Ce anomaly because of the existence of buserite. This suggests that FMMNs in the red clay from 25 mbsf to the top of the cored interval were deposited continuously in an oxic diagenetic bottom environment. The red clay below 30 mbsf with higher Mn contents contains few FMMNs but abundant tiny Mn particles within brown silicates coated by Fe (oxy-hydro)oxides. This indicates that the mode of manganese deposition changed between 25 and 30 mbsf.

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Fil: Bicocca, Mauricio . Universidad de Los Andes (Venezuela)

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Elemental concentrations were determined on 21 samples from Hole 1215A to evaluate the influence of hydrothermal sources on bulk sediment composition. Rare earth element (REE) concentrations were also determined on 10 of these samples. Concentration profiles and REE patterns are consistent with a strong hydrothermal influence on sediment composition at the base of Hole 1215A.