Investigations on the sediment chronology and trace metal accumulation in Sabine-Neches estuary, Beaumont, Texas /
at the bottom of the sediment cores was in secular
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | at the bottom of the sediment cores was in secular concentrations of Al, Fe, organic carbon, and trace metals Cu, Ni, Pb, Zn) were measured along with the concentrations disagreement between 21OPb and 226Ra concentrations at depth equilibrium with 226Ra, 23OTh, and 234U in some cores, while expected from inputs of cracking catalysts used in geochronology of sediments and reconstruction of the history in others, this was not the case. The reasons for light rare earth elements, and low inventories of metals and radioactive elements in the water column, low metals with dissolved organic matter. of Al, Fe, Mn and organic carbon in four sediment cores from of the estuarine water, long removal residence times of trace of trace metal inputs into this shallow estuarine environment Pb and Zn in some sections of the sediment column were radioisotopes could be a result of the short residence time rare earth elements was observed. Enrichment might have been refineries. Therefore REEs could not be used as non-steady Sabine-Neches estuary, near Beaumont, Texas. A reliable salinity conditions, and possibly, complexation of these sediment cores analyzed. No significant enrichment of light sedimentation rate was estimated to be about 4-5 mm/yr. Due sediments. The amount of fines varied from <20% to >90% slightly enriched, Co, Cr, Cu, and Ni were depleted in all The accumulation rates of sediments and trace metals (Co, Cr, the bomb fallout history into the environment. The the large variability of grain size parameters in the the sediments, the 21OPb dating method did not prove to be this estuary have remained relatively "pristine" with respect to the very low and variable activities of excess 21OPb in to trace metal concentrations. While the concentrations of trace metals demonstrated that, since 1860, the sediments of tracers. The lack of strong enrichment of trace metals, variations of aluminum normalized enrichment factors for varied as a function of the amount of fine particles. 21OPb very useful in the study area. One difficulty had to do with was possible because the 239,240pu profiles closely tracked were investigated. The mixing rates of surface sediments were low and was about 0.16-0.40 cm2yr-1. Down core within a single core. The activities of excess 21OPb and the |
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| Item Description: | "Major subject: Oceanography". Vita. |
| Physical Description: | xi, 110 leaves : illustrations, maps ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |