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Trace and major elements in rock samples from Itingussú River Basin, Coroa-Grande, Rio de Janeiro |
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| Authors: | D R Araripe L F Bellido S R Patchineelam A V B Bellido M T Guimar?es M B A Vasconcellos |
| Institution: | 31501. Departamento de Química Analítica, Universidade Federal Fluminense, Niterói, 24020-007, Brazil 31502. Instituto de Engenharia Nuclear, C.P. 68550, Rio de Janeiro, Brazil 31503. Departamento de Geoquímica, Universidade Federal Fluminense, Niterói, 24020-007, Brazil 31504. Departamento de Geoquímica, Universidade Federal Fluminense, Niterói, 24020-007, Brazil 31505. Centro de Pesquisas Minerais, Rio de Janeiro, 22290-240, Brazil 31506. Instituto de Pesquisas Energéticas e Nucleares, S?o Paulo, 05508-900, Brazil |
| Abstract: | Summary The goal of the present work was to determine the concentration of 23 elements by instrumental neutron activation analysis in rock samples from the vicinity of Itingussú River, in order to investigate the contribution of trace and major elements from the local lithology to the river basin. The Itingussú River Basin ends in a mangrove area not yet largely impacted by antropogenic activities. So far, there are no data for the concentration of trace elements in that region, even though these data are important to the understanding of the influence of the rocks on the composition of the mangrove sediments. The results showed some enrichment of Th and some light rare earths, probably because of the presence of the mineral allanite and other accessory minerals, as identified by petrographic analysis. |
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