Mass physical, granulometric and mineralogical Characterisation of the glaciomarine sediments of the Bransfield Basin ( NW Antarctic Peninsula)
The textural analysis of two gravity cores reveals that the sediments in the Central and Eastern Bransfield subbasins are mainly clayey silts with some coarser levels of sandy silts. While a turbidity origin can be attributed to the coarser levels, other processes should control the deposition of th...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/12197 |
| Acceso en línea: | http://hdl.handle.net/10272/12197 |
| Access Level: | acceso abierto |
| Palabra clave: | Bransfield Basin Marine sedimentology Clay mineralogy Chlorite Smectite Illite |
| Sumario: | The textural analysis of two gravity cores reveals that the sediments in the Central and Eastern Bransfield subbasins are mainly clayey silts with some coarser levels of sandy silts. While a turbidity origin can be attributed to the coarser levels, other processes should control the deposition of the fine fractions, e.g. settling of suspended particles, ice-rafting and ash airfall Chlorite, smectite and illite are the dominant clay minerals. While a detritic origin can be attributed to chlorite and illite the diagenetic alteration of volcanic glass origin is the most likely origin for smectite even though a minor detritic contribution cannot be completely enied Higher sand and smectite contents, and more abundant ash laminated facies suggest that the volcanic influence is higher in the Eastern Bransfield core than in the Central Bransfield core |
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