Quantitative mapping of alluvial fan evolution using ground-based reflectance spectroscopy

2.50
Hdl Handle:
http://hdl.handle.net/10545/292350
Title:
Quantitative mapping of alluvial fan evolution using ground-based reflectance spectroscopy
Authors:
Ferrier, Graham; Pope, Richard J. J.
Abstract:
The ability of field-based reflectance spectroscopy to resolve the relative proportions of Fe-oxides and clays in soils was used to map the composition, relative age and distribution of segments within late Quaternary fan systems in Sfakia, southwest Crete. The spectrometric results demonstrate that luvisols that have formed on the surfaces of fan segments are characterized by distinctive Fe-oxides (types) and clay minerals (species). Furthermore, Fe-oxide and clay concentrations display a clear and consistent trend whereby for each study fan luvisols formed on increasingly proximal fan segments are characterized by a progressive build-up of spectrally distinct secondary iron oxides and clay minerals, which suggests that proximal segments formed first. The relative ages and hence order of formation of segments suggested by the spectral data are strongly supported by an optically stimulated luminescence (OSL)-based geochronology which provides a tentative maximum age of 144 ka for the oldest (stage 1) surface and 11.2 ka for the youngest (stage 2C) surface. Moreover, the chronometric data indicate that time intervals of the order 20 to 25,000 years are necessary to generate sufficient differences in pedogenic Fe-oxides and clay concentrations to enable differentiation of fan segments by field spectroscopy. ⺠Field-based reflectance spectroscopy was used to map alluvial fan segments. ⺠Strong relationships between spectral profiles and soil composition were identified. ⺠Fan segments were differentiated using time interval between depositional events. ⺠Age differences of 25,000 years are required to differentiate fan segments.
Affiliation:
University of Hull; University of Derby
Journal:
Geomorphology
Issue Date:
2012
URI:
http://hdl.handle.net/10545/292350
DOI:
10.1016/j.geomorph.2012.06.013
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0169555X12002978
Type:
Article
Language:
en
Description:
Research paper based on primary research in Crete
ISSN:
0169555X
Appears in Collections:
Human & Physical Environments Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorFerrier, Grahamen
dc.contributor.authorPope, Richard J. J.en
dc.date.accessioned2013-05-20T11:11:46Z-
dc.date.available2013-05-20T11:11:46Z-
dc.date.issued2012-
dc.identifier.issn0169555X-
dc.identifier.doi10.1016/j.geomorph.2012.06.013-
dc.identifier.urihttp://hdl.handle.net/10545/292350-
dc.descriptionResearch paper based on primary research in Creteen
dc.description.abstractThe ability of field-based reflectance spectroscopy to resolve the relative proportions of Fe-oxides and clays in soils was used to map the composition, relative age and distribution of segments within late Quaternary fan systems in Sfakia, southwest Crete. The spectrometric results demonstrate that luvisols that have formed on the surfaces of fan segments are characterized by distinctive Fe-oxides (types) and clay minerals (species). Furthermore, Fe-oxide and clay concentrations display a clear and consistent trend whereby for each study fan luvisols formed on increasingly proximal fan segments are characterized by a progressive build-up of spectrally distinct secondary iron oxides and clay minerals, which suggests that proximal segments formed first. The relative ages and hence order of formation of segments suggested by the spectral data are strongly supported by an optically stimulated luminescence (OSL)-based geochronology which provides a tentative maximum age of 144 ka for the oldest (stage 1) surface and 11.2 ka for the youngest (stage 2C) surface. Moreover, the chronometric data indicate that time intervals of the order 20 to 25,000 years are necessary to generate sufficient differences in pedogenic Fe-oxides and clay concentrations to enable differentiation of fan segments by field spectroscopy. ⺠Field-based reflectance spectroscopy was used to map alluvial fan segments. ⺠Strong relationships between spectral profiles and soil composition were identified. ⺠Fan segments were differentiated using time interval between depositional events. ⺠Age differences of 25,000 years are required to differentiate fan segments.en
dc.language.isoenen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0169555X12002978en
dc.rightsArchived with thanks to Geomorphologyen
dc.subjectAlluvial fansen
dc.subjectSfakia, SW Creteen
dc.subjectGround-based reflectance spectroscopyen
dc.titleQuantitative mapping of alluvial fan evolution using ground-based reflectance spectroscopyen
dc.typeArticleen
dc.contributor.departmentUniversity of Hullen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalGeomorphologyen
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