You need JavaScript to view this

Example dated with {sup 210}Pb; Ejemplo de fechado con {sup 210}Pb

Abstract

In this chapter we describe in detail, using an example, the procedure to date a core with the technique of {sup 210}Pb using the models described in Chapter 7. Described below, one by one, the spreadsheets containing the information and calculations necessary to complete a profile geochronology of {sup 210}Pb core adapted from Gulf of Tehuantepec, Mexico. In this case, the old model obtained from the CA model could not be validated with {sup 137}Cs because the peak age of {sup 137}Cs is too old (1985 {+-} 3 years). Moreover, there was an investment of age between sections 2-3 and 3-4 cm because the activity of the lower section is higher than at the top, most likely due to a change in sediment accumulation. The average value of MAR (obtained with the CFCS model: 0.222 {+-} 0.016 g cm{sup -2} yr{sup -1}) is in good agreement with the range obtained with the model MAR CF (0.03 {+-} 0.02 to 0.30 {+-} 0.01 g cm{sup -2} yr{sup -1}). The chronology obtained with the CF model is well validated with the peak of {sup 137}Cs (section 6-7 cm: 1960-1972). SAR profiles and MAR show a progressive increase from the late nineteenth century,  More>>
Authors:
Ruiz-Fernandez, Ana Carolina; [1]  Sanchez-Cabeza, Joan-Albert [2] 
  1. Universidad Nacional Autonoma de Mexico, Instituto de Ciencias del Mar y Limnologia (Mexico)
  2. Organismo Internacional de la Energia Atomica, Laboratorios del Medio Marino (Monaco)
Publication Date:
Jul 01, 2012
Product Type:
Book
Resource Relation:
Other Information: figs, tabs; Related Information: In: Sediment Radiochronology Using Coastal {sup 210P}b: Model, Validation and Applications (Spanish Edition)| 118 p.
Subject:
54 ENVIRONMENTAL SCIENCES; AGE ESTIMATION; CESIUM 137; CHLOROFLUOROCARBONS; LEAD 210; SEDIMENTATION; SEDIMENTS
OSTI ID:
22030299
Research Organizations:
International Atomic Energy Agency, Radiometrics Laboratory, Marine Environmental Studies Laboratory (Monaco); United Nations Environment Program-Caribbean Regional Coordinating Unit (UNEP-CAR/RCU), Kingston (Jamaica)
Country of Origin:
IAEA
Language:
Spanish
Other Identifying Numbers:
Other: ISBN 978-92-0-325210-2; TRN: XA12N2102119004
Availability:
Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/P1538_S_web.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 85-102
Announcement Date:
Jan 29, 2013

Citation Formats

Ruiz-Fernandez, Ana Carolina, and Sanchez-Cabeza, Joan-Albert. Example dated with {sup 210}Pb; Ejemplo de fechado con {sup 210}Pb. IAEA: N. p., 2012. Web.
Ruiz-Fernandez, Ana Carolina, & Sanchez-Cabeza, Joan-Albert. Example dated with {sup 210}Pb; Ejemplo de fechado con {sup 210}Pb. IAEA.
Ruiz-Fernandez, Ana Carolina, and Sanchez-Cabeza, Joan-Albert. 2012. "Example dated with {sup 210}Pb; Ejemplo de fechado con {sup 210}Pb." IAEA.
@misc{etde_22030299,
title = {Example dated with {sup 210}Pb; Ejemplo de fechado con {sup 210}Pb}
author = {Ruiz-Fernandez, Ana Carolina, and Sanchez-Cabeza, Joan-Albert}
abstractNote = {In this chapter we describe in detail, using an example, the procedure to date a core with the technique of {sup 210}Pb using the models described in Chapter 7. Described below, one by one, the spreadsheets containing the information and calculations necessary to complete a profile geochronology of {sup 210}Pb core adapted from Gulf of Tehuantepec, Mexico. In this case, the old model obtained from the CA model could not be validated with {sup 137}Cs because the peak age of {sup 137}Cs is too old (1985 {+-} 3 years). Moreover, there was an investment of age between sections 2-3 and 3-4 cm because the activity of the lower section is higher than at the top, most likely due to a change in sediment accumulation. The average value of MAR (obtained with the CFCS model: 0.222 {+-} 0.016 g cm{sup -2} yr{sup -1}) is in good agreement with the range obtained with the model MAR CF (0.03 {+-} 0.02 to 0.30 {+-} 0.01 g cm{sup -2} yr{sup -1}). The chronology obtained with the CF model is well validated with the peak of {sup 137}Cs (section 6-7 cm: 1960-1972). SAR profiles and MAR show a progressive increase from the late nineteenth century, due to economic development and population growth in the Gulf of Tehuantepec. This growth, which has altered the coastal marine circulation and sedimentation regimes, had its greatest impact during the past two decades, after the establishment of three major industrial complexes in the region. [Spanish] En este capitulo describimos con detalle, utilizando un ejemplo, el procedimiento para fechar un core con la tecnica de {sup 210}Pb utilizando los modelos descritos en el Capitulo 7. A continuacion describimos, una a una, las hojas de calculo que contienen la informacion y los calculos necesarios para realizar la geocronologia de un perfil de {sup 210}Pb adaptado de un core del Golfo de Tehuantepec, Mexico. En este caso, el modelo de edad obtenido a partir del model CA no pudo ser validado con {sup 137}Cs porque la edad del pico de {sup 137}Cs es demasiado antigua (1985 {+-} 3 anos). Ademas, se observo una inversion de edad entre las secciones 2-3 y 3-4 cm porque la actividad de la seccion inferior es mayor que en la superior, muy probablemente debido a un cambio en la acumulacion de sedimento. El valor medio de MAR (obtenido con el modelo CFCS: 0.222{+-}0.016 g cm{sup -2} yr{sup -1}) esta en buen acuerdo con el rango de MAR obtenido con el modelo CF (de 0.03 {+-} 0.02 a 0.30 {+-} 0.01 g cm{sup -2} yr{sup -1}). La cronologia obtenida con el modelo CF esta bien validada con el pico de {sup 137}Cs (seccion 6-7 cm: 1960-1972). Los perfiles de SAR y MAR muestran un aumento progresivo desde finales del siglo XIX, debido al desarrollo economico y crecimiento de la poblacion en la costa del Golfo de Tehuantepec. Este crecimiento, que ha alterado la circulacion marina costera y los regimenes de sedimentacion, tuvo su mayor impacto durante las ultimas dos decadas, despues del establecimiento de 3 importantes complejos industriales en la region.}
place = {IAEA}
year = {2012}
month = {Jul}
}