A note on a mineralogical analysis of the sediments associated with the Plata River and Patos Lagoon outflows


Autoria(s): CAMPOS, Edmo J. D.; MULKHERJEE, Swapna; PIOLA, Alberto R.; CARVALHO, Flavio M. S. de
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2008

Resumo

Riverine waters bring to seas a variety of suspended materials, which are ultimately deposited on the shelf or exported to the deep ocean. Investigation of the mineralogical contents of these continental-borne constituents on seafloors may reveal valuable information about the environmental conditions in the drainage basin. In this note we report results of X-ray diffraction and other analysis of sediments in bottom samples collected on the continental shelf under influence of the Plata River and the Patos Lagoon, in South America. The analysis reveals that non-clay materials are mostly concentrated south of 33 degrees S, while clay sediments are relatively more abundant further north. We propose that such distributions are controlled by the circulation pattern and water mass distribution of the lower and upper layers, respectively. (C) 2008 Elsevier Ltd. All rights reserved.

Identificador

CONTINENTAL SHELF RESEARCH, v.28, n.13, p.1687-1691, 2008

0278-4343

http://producao.usp.br/handle/BDPI/32043

10.1016/j.csr.2008.03.014

http://dx.doi.org/10.1016/j.csr.2008.03.014

Idioma(s)

eng

Publicador

PERGAMON-ELSEVIER SCIENCE LTD

Relação

Continental Shelf Research

Direitos

restrictedAccess

Copyright PERGAMON-ELSEVIER SCIENCE LTD

Palavras-Chave #clay minerals #Rio de la Plata #fresh water plume #Southwest Atlantic continental shelf #SOUTH-ATLANTIC #RECORD #Oceanography
Tipo

article

original article

publishedVersion