946 resultados para TIN OXIDES


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One of the objectives of Leg 55 was to investigate the Tertiary history of sedimentation and environment on the Emperor Seamounts after their volcanic activity. For the three first sites, 430, 431, and 432, drilled on Ojin, Nintoku, and Yömei Seamounts, the Neogene sedimentary deposits are not well represented and are not typical pelagic sediments. Except for two holes (430A and 432), where we found calcareous oozes, the sediments are heterogeneous sands, gravels, and pebbly mudstones with a wide range in grain size and composition. Two phenomena characterize these deposits: the inheritance of volcaniclastic material and its alteration, and the authigenesis of secondary minerals including silicates, phosphates, and ferromanganese oxides formed under volcanic influence in a marine environment.

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Includes bibliographies.

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Work performed at the Argonne National Laboratory.

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A total of 699 references are included to journal articles and reports dealing with properties of bismuth, lead, and tin tellurides. The references are arranged by sujbect. Author and report-number indexes are included.

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"Physics thesis under the direction of Professor Sherwood K. Haynes."

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"Contract AT-30-1-GEN-366."