The ITRAX core scanner, a useful tool to distinguish anthropic vs. climatic influences in lagoon of Aveiro (N Portugal)

This paper aims to distinguish anthropic and climatic influences in sediments from the lagoon of Aveiro (Portugal). This study is based on a core (240-cm long) collected in Murtosa Channel. Optical and X-radiographic images and high-resolution elemental profiles were acquired with ITRAX micro-X-ray...

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Published in:Journal of coastal research 2013-01, Vol.1 (65), p.70-70
Main Authors: Martins, Virginia A, Dias, Joao A, Bernardes, Cristina, Rubio, Belen, Bernabeu, Ana, Rey, Daniel, Soares, Antonio M, Sobrinho, Frederico, Laut, Lazaro M, Frontalini, Fabrizio, Terroso, Denise, Miranda, Paulo, Fernandez-Fernandez, Sandra, Rodrigues, Maria Antonieta, Figueira, Rubens, Sousa, Silvia, Amaral, Paula, Mahiques, Michel, Rocha, Fernando
Format: Article
Language:English
Subjects:
Aluminum
Carbon
Channels
Coastal
Coasts
Environmental impact
Lagoons
Organic carbon
Sand
Sediments
Tidal currents
X-ray fluorescence
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container_end_page 70
container_issue 65
container_start_page 70
container_title Journal of coastal research
container_volume 1
creator Martins, Virginia A
Dias, Joao A
Bernardes, Cristina
Rubio, Belen
Bernabeu, Ana
Rey, Daniel
Soares, Antonio M
Sobrinho, Frederico
Laut, Lazaro M
Frontalini, Fabrizio
Terroso, Denise
Miranda, Paulo
Fernandez-Fernandez, Sandra
Rodrigues, Maria Antonieta
Figueira, Rubens
Sousa, Silvia
Amaral, Paula
Mahiques, Michel
Rocha, Fernando
description This paper aims to distinguish anthropic and climatic influences in sediments from the lagoon of Aveiro (Portugal). This study is based on a core (240-cm long) collected in Murtosa Channel. Optical and X-radiographic images and high-resolution elemental profiles were acquired with ITRAX micro-X-ray fluorescence (XRF) core scanner. Samples collected at each approximately 3 cm along the core were analysed for grain size and total organic carbon. Furthermore, the fine fraction of selected layers was subjected to geochemical analysis by ICP-MS, after total acid digestion of the sediments, and mineralogical analysis, by XRD techniques. Sediments along the core are composed by fine and medium sand, with several mud layers. The progressive increase of Si/Al, Cl/Al, Rb/Al, K/Al and Br/Al and reduced Al concentrations, from the base to the top of this core, are interpreted as being related to higher marine influence and greater differences in tidal currents with longer exposition to air of the sediments with the consequent formation of brines favouring minerals precipitation in the area (e.g. anhydrite).
doi_str_mv 10.2112/SI65-013
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source JSTOR Archival Journals and Primary Sources Collection; Allen Press Journals
subjects Aluminum
Carbon
Channels
Coastal
Coasts
Environmental impact
Lagoons
Organic carbon
Sand
Sediments
Tidal currents
X-ray fluorescence
title The ITRAX core scanner, a useful tool to distinguish anthropic vs. climatic influences in lagoon of Aveiro (N Portugal)
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