An alternative method for dating unknown tephras based on a segmented regression model
dc.contributor.author
dc.contributor.editor
dc.date.accessioned
2008-05-13T09:45:32Z
dc.date.available
2008-05-13T09:45:32Z
dc.date.issued
2008-05-28
dc.identifier.citation
Lee, B.W.; Bacon Shone, J. 'An alternative method for dating unknown tephras based on a segmented regression model' a CODAWORK’08. Girona: La Universitat, 2008 [consulta: 13 maig 2008]. Necessita Adobe Acrobat. Disponible a Internet a: http://hdl.handle.net/10256/728
dc.identifier.uri
dc.description.abstract
In CoDaWork’05, we presented an application of discriminant function analysis (DFA) to 4 different
compositional datasets and modelled the first canonical variable using a segmented regression model
solely based on an observation about the scatter plots. In this paper, multiple linear regressions are
applied to different datasets to confirm the validity of our proposed model. In addition to dating the
unknown tephras by calibration as discussed previously, another method of mapping the unknown tephras
into samples of the reference set or missing samples in between consecutive reference samples is
proposed. The application of these methodologies is demonstrated with both simulated and real datasets.
This new proposed methodology provides an alternative, more acceptable approach for geologists as their
focus is on mapping the unknown tephra with relevant eruptive events rather than estimating the age of
unknown tephra.
Kew words: Tephrochronology; Segmented regression
dc.description.sponsorship
Geologische Vereinigung; Institut d’Estadística de Catalunya; International Association for Mathematical Geology; Càtedra Lluís Santaló d’Aplicacions de la Matemàtica; Generalitat de Catalunya, Departament d’Innovació, Universitats i Recerca; Ministerio de Educación y Ciencia; Ingenio 2010.
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada
dc.rights
Tots els drets reservats
dc.subject
dc.title
An alternative method for dating unknown tephras based on a segmented regression model
dc.type
info:eu-repo/semantics/conferenceObject
dc.rights.accessRights
info:eu-repo/semantics/openAccess