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Spatial Distribution of Clay Minerals in Guanabara Bay Sediments and Its Relationship with the Estuary Hydrodynamics
| Content Provider | Semantic Scholar |
|---|---|
| Author | Patchineelam, Soraya Maia Neto, José Antônio Baptista |
| Copyright Year | 2007 |
| Abstract | Ninety-two samples were collected in the Guanabara Bay bottom sediments. After grainsize analyses, clay mineral identification was performed in twenty-five samples located in the inner section of the bay where fine sediment deposition predominates. Kaolinites (mean=73%), illites (mean=16%) and smectites (mean=11%) were the group of clay minerals identified. The clay minerals identified showed detrital characteristics which indicate an absence of recent authigenic processes within the surface sediments of the bay. Smectites showed a preferential setting towards the region of higher salinity values. Its lowest abundance (0.15%) was observed near the rivers where the average salinity was 14 whereas its highest abundance (17%) was observed at the most downstream station with average salinity of 32. An inverse relationship between kaolinites and smectites relative abundance was also observed from the inner region towards the more saline region of the bay. |
| File Format | PDF HTM / HTML |
| DOI | 10.21715/gb.v21i1.252 |
| Volume Number | 21 |
| Alternate Webpage(s) | http://www.geobrasiliensis.org.br/geobrasiliensis/article/download/252/pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
