Show simple item record

dc.contributor.authorLiu, Chun-Ru
dc.contributor.authorGruen, Rainer
dc.date.accessioned2017-05-16T04:21:40Z
dc.date.available2017-05-16T04:21:40Z
dc.date.issued2011
dc.identifier.issn1350-4487
dc.identifier.doi10.1016/j.radmeas.2011.06.076
dc.identifier.urihttp://hdl.handle.net/10072/336840
dc.description.abstractESR dating of fluvial terraces is usually based on the assumption of sunlight resetting of the Al centres in quartz. Very long bleaching times (months of sunlight exposure) are required to reset this centre to a stable, non-zero ESR intensity. Considering that highly light sensitive optically stimulated luminescence (OSL) analyses of fluvial samples often indicate partial bleaching, ESR dating should be extremely difficult. Two samples were analysed, a fluvial sediment from a Chinese river terrace and an Australian granite. Using a Höhnle sunlight simulator, the Ti centres of both samples were completely bleached within 1 to 65 h, while the Al centre required extreme bleaching times to reach stable residual intensities (∼1000 h). As an alternative to light resetting, tumbler experiments were carried out to simulate fluvial action. The samples were treated under OSL sample preparation conditions. After relatively short tumbling times, corresponding to a few km of fluvial transport, both Al- and Ti-centres were partially reset. In a granite sample, the tumbling reduced the intensity of the Al centre more effectively than light exposure.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherElsevier
dc.relation.ispartofpagefrom1038
dc.relation.ispartofpageto1042
dc.relation.ispartofissue10
dc.relation.ispartofjournalRadiation Measurements
dc.relation.ispartofvolume46
dc.subject.fieldofresearchGeochronology
dc.subject.fieldofresearchAtomic, Molecular, Nuclear, Particle and Plasma Physics
dc.subject.fieldofresearchOther Physical Sciences
dc.subject.fieldofresearchGeology
dc.subject.fieldofresearchcode040303
dc.subject.fieldofresearchcode0202
dc.subject.fieldofresearchcode0299
dc.subject.fieldofresearchcode0403
dc.titleFluvio-mechanical resetting of the Al and Ti centres in quartz
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorGrun, Rainer


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record