Distribution of carbon, nitrogen, phosphorus and other geochemical parameters on the Amazon continental shelf, Northern Brazil

Authors

  • Gilmar W. Siqueira Laboratório de Química Analítica e Ambiental, Departamento de Química do Centro de Ciências Exatas e Naturais, Universidade Federal do Pará, Campus Universitário do Guamá, Belém, PA 66075-100, Brasil Http://www.ufpa.br/quimicanalitica/laquanam
  • A. S. Mendes Departamento de Química do Centro de Ciências Exatas e Naturais, Universidade Federal do Pará, Campus Universitário do Guamá, Belém, PA, 66075-100, Brasil
  • W. N. Lima Departamento de Química do Centro de Ciências Exatas e Naturais, Universidade Federal do Pará, Campus Universitário do Guamá, Belém ,PA, 66075-100, Brasil
  • F. M. Aprile Instituto Nacional de Pesquisa da Amazônia, Manaus, AM69060-001, Brasil.
  • E. S. Braga Departamento de Oceanografia Física, Química e Geológica, Instituto Oceanográfico, Universidade de São Paulo, São Paulo, SP05315-970, Brasil.

DOI:

https://doi.org/10.32360/acmar.v37i1-2.6478

Keywords:

bottom sediments, carbon, nitrogen, organic matter, carbonates, C/N ratio, iron oxides, manganese, aluminium, continental shelf, Amazon River, Northern Brazil.

Abstract

This work was carried out on the continental shelf under the influence of Amazon River, Northern Brazil, between the Capes Orange (AP) and Maguari (PA) with the main aim to evaluate some geochemical processes such as the distribution of elementary organic carbon, total nitrogen, organic matter, percentile of carbonates, C/N ratio, iron oxides, manganese and aluminium as related to bottom of sediments of the region. The collections occurred from May, 2 to May, 11 of 1999 in the period of maximum discharge of the Amazon and Pará Rivers. Analyzing the results, a similarity was observed among the data of the several sampling stations. This fact strengthens the existence of homogenity in the study region as a result of the performance of two main phenomena: the strong water discharge produced by the Amazon and Pará Rivers, and the action of the North Coastal Current of Brazil (CCNB) causing the mixture of the water bodies.

Published

2017-03-10

Issue

Section

Artigos originais