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Daunis i Estadella, Josep
MartÃn Fernández, Josep Antoni |
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Universitat de Girona. Departament d’Informà tica i Matemà tica Aplicada | |
Lee, Bik-wa
Bacon Shone, John |
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In CoDaWork’05, we presented an application of discriminant function analysis (DFA) to 4 differentcompositional datasets and modelled the first canonical variable using a segmented regression modelsolely based on an observation about the scatter plots. In this paper, multiple linear regressions areapplied to different datasets to confirm the validity of our proposed model. In addition to dating theunknown tephras by calibration as discussed previously, another method of mapping the unknown tephrasinto samples of the reference set or missing samples in between consecutive reference samples isproposed. 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 theirfocus is on mapping the unknown tephra with relevant eruptive events rather than estimating the age ofunknown tephra.Kew words: Tephrochronology; Segmented regression Geologische Vereinigung; Institut d’EstadÃstica de Catalunya; International Association for Mathematical Geology; Cà tedra LluÃs Santaló d’Aplicacions de la Matemà tica; Generalitat de Catalunya, Departament d’Innovació, Universitats i Recerca; Ministerio de Educación y Ciencia; Ingenio 2010. |
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http://hdl.handle.net/2072/14744 | |
eng | |
Universitat de Girona. Departament d’Informà tica i Matemà tica Aplicada | |
Tots els drets reservats | |
Geologia -- Mètodes estadÃstics
Calibratge |
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An alternative method for dating unknown tephras based on a segmented regression model | |
info:eu-repo/semantics/conferenceObject | |
Recercat |