Sedimentological processes in lahars: Insights from optically stimulated luminescence analysis

Muñoz‐Salinas, Esperanza; Bishop, Paul; Zamorano, Jose-Juan; Sanderson, David

doi:10.1016/j.geomorph.2011.06.024

Cited by 18 publications

(14 citation statements)

References 43 publications

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“…Kinnard et al 2012;Muñoz-Salinas et al 2011). POSL profiling of very recent sediments, such as investigated in this study, appears to be successful and supports the findings of Muñoz-Salinas et al (2012) who successfully used PSOL data from deposits which were in the 10-500 year range. Some studies have used the inter-sample variability to indicate reworking (e.g.…”

Section: Discussionsupporting

confidence: 84%

“…Burbidge et al 2007) or changes in provenance (e.g. Muñoz-Salinas et al 2012). Inter sample variability and how quickly the POSL signal depletes has also been used to indicate whether sediments are well or poorly bleached (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Inter sample variability and how quickly the POSL signal depletes has also been used to indicate whether sediments are well or poorly bleached (e.g. Kinnaird et al 2012;Muñoz-Salinas et al 2012;Muñoz-Salinas et al 2014). This current study shows that where samples are both recent and from a depositional context with poor bleaching,intersample variability can not be accounted for in this way.…”

Section: Discussionmentioning

confidence: 99%

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Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

Bateman

Stein

Ashurst

et al. 2015

Quaternary Geochronology

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Establishing a robust chronology is fundamental to most palaeoenvironmental studies. However, the number and positioning of dated points is critical. Using a portable luminescence reader, it is possible to rapidly generate high resolution down core relative age profiles. Profiles of portable luminescence data from two coastal dunes were evaluated and compared with the results of particle size analysis, stratigraphy, and an independent historical chronology. Results show that, even in young samples, portable luminescence data is dominated by an age related signal which in homogeneous sediment need not be corrected for moisture, feldspar content changes or grain size. Profiles therefore provide relative chronologies from which accumulation phases can be established, and from which better targeted sampling and comparison to other sites could be undertaken. Even though they do not provide instant absolute chronologies, field-based portable luminescence profiling of Late Quaternary sites hold much potential to improve the resultant chronologies.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

Bateman

Stein

Ashurst

et al. 2015

Quaternary Geochronology

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“…En la parte superior del perfil, que corresponde con una edad reciente, el sedimento tuvo su origen en un deslizamiento de los materiales de una terraza situada a una elevación mayor a la de la localización del perfil. Muñoz-Salinas et al (2012) estudiaron la luminiscencia en dos depósitos de lahares ocurridos en el volcán Popocatépetl (México) en los años 1997 y 2001. De estos eventos se extrajeron muestras para realizar el análisis de luminiscencia en distintos tramos del recorrido de estos flujos.…”

Section: Introductionunclassified

“…Una vez depositados los granos, éstos comenzarán a almacenar más electrones y, si éstos son estimulados ópticamente en el laboratorio, se detectará una luminiscencia residual previa al último enterramiento, lo cual genera una sobreestimación de la edad del depósito cuando se realiza datación con la OSL (Duller, 2008). No obstante que la sobrestimación en las edades por los procesos descritos se evitan cuando se usa la OSL en la datación de sedimentos, dicho exceso de luminiscencia en una muestra puede proporcionar información sobre los mecanismos de transporte de los granos minerales, en particular, cuando el transporte de sedimentos ocurre de forma rápida (Muñoz-Salinas et al, 2012).…”

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Luminiscencia Ópticamente Estimulada aplicada a sedimentos fluviales: Un enfoque basado en la interpretación de las señales luminosas

Muñoz‐Salinas¹,

Castillo-Rodríguez²

2014

BSGM

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Luminiscencia Ópticamente Estimulada aplicada a sedimentos fluviales 225 ResumenLos depósitos fluviales acarrean granos minerales los cuales están expuestos, en mayor o menor medida, a la luz solar durante su desplazamiento dentro de la columna de agua que los transporta. En geomorfología, se utiliza el método de Luminiscencia Ópticamente Estimulada (OSL, por sus siglas en inglés) para obtener la edad absoluta de aquellos sedimentos que, previos a su deposición, han sido expuestos completamente a la luz solar. Un nuevo enfoque en la OSL se centra en estudiar las señales de luminiscencia en sedimentos para obtener información sobre los mecanismos de transporte que los generaron sin importar que los granos estuvieran totalmente expuestos a la luz solar antes de su deposición. El objetivo de este artículo es proporcionar dos estudios de caso en los cuales se utilizan las señales de luminiscencia siguiendo el nuevo enfoque de la OSL con la finalidad de ejemplificar cómo se usan las señales de luminiscencia para explicar los mecanismos de transporte de sedimento. Las áreas de estudio se localizan en la Sierra de Gredos (España) y en la presa Cadder (Escocia) donde se analizan los depósitos de flujos de derrubios y los depósitos fluviales, respectivamente. Los patrones de luminiscencia obtenidos en la Sierra de Gredos permitieron distinguir los sedimentos de origen fluvial con respecto a los de flujos de derrubios. En el caso de la presa de Cadder, se detectó que los distintos tamaños de grano son inversamente proporcionales a las señales de luminiscencia. Este nuevo enfoque en el uso de la OSL se propone como una herramienta útil en geomorfología para estudiar los mecanismos de transporte de sedimentos mediante el estudio de los depósitos fluviales.Palabras clave: Depósitos fluviales, transporte de sedimento, OSL, señales de luminiscencia, Sierra de Gredos, Cadder. Abstract Fluvial deposits contain mineral grains that are exposed to solar radiation during their transport in the water

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Using OSL to assess hypotheses related to the impacts of land use change with the early nineteenth century arrival of Europeans in south‐eastern Australia: an exploratory case study from Grabben Gullen Creek, New South Wales

Muñoz‐Salinas

Bishop

Sanderson

et al. 2014

Earth Surf Processes Landf

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A common explanation for intense soil erosion and gullying in SE Australia is the introduction by Europeans of new land use practices following their arrival in Australia in the late 18th century. Eucalyptus woodlands were cleared to introduce farming, and valley bottoms, characterized by chains of ponds with organic‐rich swampy meadow (SM) soils, were subsequently buried by thick deposits of ‘post‐settlement alluvium’ (PSA) generated by erosion in the catchment. In this study, optically stimulated luminescence (OSL) is used to evaluate the source(s) of the PSA in Grabben Gullen Creek (GGC), Australia. We use a portable OSL reader to measure total photon counts on bulk polymineral and polygrain‐size samples from nine profiles along the Creek. We use these luminescence signals as geotracers of sediment source(s) and transport pathways. We obtained higher luminescence signals in the PSA than in the SM sediments, suggesting different sources and fluvial transport conditions for these two widespread sedimentary units. Portable OSL reader data from soils in the GGC catchment that are potential sources for the SM sediments and PSA show that the high luminescence signals recorded in the PSA are similar to those from subsoil samples in granite soils, suggesting that the PSA was derived by gullying of granite subsoils. In the SM sediments, luminescence signals decrease upwards from the base of the profile, as expected in well‐reset fluvial deposits, but with one or more changes in gradient in the profile of photon counts with depth, most likely indicating changes in sediment deposition rates. To calculate deposition rates in the SM sediments, several samples were dated using OSL. The OSL ages produced low scatter in the equivalent doses, confirming the well‐reset nature of the grains composing the SM and indicating a process of sediment transport in dilute flows, as is interpreted from the portable OSL signals. Copyright © 2014 John Wiley & Sons, Ltd.

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Sedimentological processes in lahars: Insights from optically stimulated luminescence analysis

Cited by 18 publications

References 43 publications

Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

Luminiscencia Ópticamente Estimulada aplicada a sedimentos fluviales: Un enfoque basado en la interpretación de las señales luminosas

Using OSL to assess hypotheses related to the impacts of land use change with the early nineteenth century arrival of Europeans in south‐eastern Australia: an exploratory case study from Grabben Gullen Creek, New South Wales

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