English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/18327
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 8 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Clay minerals in late Quaternary sediments from the south Chilean margin as indicators of provenance and palaeoclimate

AutorMarinoni, L.; Setti, M.; Salvi, C.; López-Galindo, A.
Palabras claveChile
Strait of megellan
Marine sediments
Palaeoclimate
Provenance
Clay minerals
Smectite
XRD
TEM
Fecha de publicación2-jun-2008
EditorMineralogical Society (Great Britain)
CitaciónClay Minerals 43(2): 235-253 (2008)
ResumenAn investigation of bulk-rock and clay-fraction compositions of two sedimentary cores from southern Chile was performed to evaluate the record of temporal climatic changes during the late Quaternary (11 ky and 30 ky BP). The bulk mineralogy shows an abundance of feldspars, mica and quartz, with lesser chlorite, amphibole and pyroxene, and variable amounts of carbonates. The clay fraction consists of illite, chlorite and scarce smectite. Smectite shows platy morphology, an Al-Fe beidellite chemical composition, and is detrital. Smectite, together with biogenic carbonate, increases in levels diagnostic of warmer phases. Increases in smectite are attributed either to the beginning of chemical weathering, allowed by the glacial retreat, or to ice extension and sea-level variations. Warmer climates also favoured the increase of carbonate productivity. Levels diagnostic of colder phases show a large decrease in carbonate, small amounts of smectite and large amounts of chlorite and mica, as the abundance of glaciers reduced the productivity and prevented chemical weathering.
Versión del editorhttp://dx.doi.org/10.1180/claymin.2008.043.2.07
URIhttp://hdl.handle.net/10261/18327
DOI10.1180/claymin.2008.043.2.07
ISSN1993-8616
Aparece en las colecciones: (IACT) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.