Major and trace element analyses were made on biogenic carbonate,
silica, and fish debris and on authigenic philhipsite, micronodules, and
yellow and brown aggregates recovered from Bauer and Roggeveen Basin
metalliferous sediments. Phase components and the bulk samples were
analyzed by INAA and MS methods. Leachates and residues from ammonium
oxalate and mild HC1 leaches of bulk and fine sediment fractions were
also analyzed. The mild acid leach removed fish debris and carbonate,
and the oxalate leach dissolved the micronodule phase. Sediments of the
Bauer and Roggeveen Basins differ in bulk composition, yet respond to
various chemical treatments in similar manner. I interpret this as indicative
of a close similarity in the mineralogy of these two areas.
An iron-rich smectite, manganese micronodules, and fish debris
dominate the sediment compositions of both basins. The smectite phase
concentrates Fe, Si, and Al. Manganese, Co, Ni, Ce, and W are concentrated
in the micronodule phase and Ca, Sc, and the lanthanides predominantly
in the fish debris component. The trace elements Cu, Zn, As, and
Sb are distributed in a complex manner among the three principal phases.
Barium, and some Al and Fe, may be present in small quantities of barite,
feldspars, and goethite, respectively. Silica, carbonate, and phillipsite
phases exist in. such low concentrations that they do not contribute
significantly to the bulk composition of the sediments. The response of
the various size fractions leached indicates a uniformity of distribution
of sediment components from the coarse to the fine fractions. / Graduation date: 1978
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/27805 |
| Date | 19 September 1977 |
| Creators | Lopez, Carlos |
| Contributors | Corliss, John B. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
Page generated in 0.002 seconds