Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/18327
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

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

AuthorsMarinoni, L.; Setti, M.; Salvi, C.; López-Galindo, A.
KeywordsChile
Strait of megellan
Marine sediments
Palaeoclimate
Provenance
Clay minerals
Smectite
XRD
TEM
Issue Date2-Jun-2008
PublisherMineralogical Society (Great Britain)
CitationClay Minerals 43(2): 235-253 (2008)
AbstractAn 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.
Publisher version (URL)http://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
Appears in Collections:(IACT) Artículos

Show full item record
Review this work

SCOPUSTM   
Citations

15
checked on May 15, 2022

WEB OF SCIENCETM
Citations

13
checked on May 20, 2022

Page view(s)

391
checked on May 22, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.