| Texto completo | |
| Autor(es): |
Bin Hassan, Muhammad
[1]
;
Rodelli, Daniel
[1]
;
Benites, Mariana
[1]
;
Abreu, Fernanda
[2]
;
Murton, Bramley
[3]
;
Jovane, Luigi
[1]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Oceanog, Sao Paulo - Brazil
[2] Univ Fed Rio de Janeiro, Inst Microbiol Paulo de Goes, Rio De Janeiro - Brazil
[3] Natl Oceanog Ctr, Southampton, Hants - England
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENVIRONMENTAL MICROBIOLOGY REPORTS; v. 12, n. 3, p. 288-295, JUN 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
Transmission electron microscopy (TEM) and rock magnetic study of ferromanganese nodule sample JC120-104B collected from Clarion-Clipperton zone (CCZ) in the eastern Pacific Ocean indicate the presence of biogenic magnetite (magnetofossils). First-order reversal curves (FORCs) and decomposition of isothermal remanent magnetization (IRM) curves were used as the main tool for the characterization of magnetic properties of the bulk magnetic minerals present in the sample. TEM was performed for the direct identification of biogenic magnetic minerals (magnetofossils). The nodule sample has distinctive alternating Mn and Fe-rich layers per micro-X-ray fluorescence data. While diagenetic precipitation of Mn is known for the less oxygenated environment, the presence of biogenic magnetite is also common in the environments where the supply of oxygen is limited. Moreover, the increase in magnetic properties is consistent with the increase in Mn-content, which is related to favourable conditions for Mn precipitation as well as magnetite biomineralization in oxic-suboxic transition zone. Investigations on magnetofossil fingerprints lead to a better understanding of paleoenvironmental conditions involved in the formation and growth of deep-sea ferromanganese nodules. (AU) | |
| Processo FAPESP: | 17/04821-0 - Análise magnetostratigráfica de depósitos de ferromanganês |
| Beneficiário: | Muhammad Bin Hassan |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 18/17061-6 - Relação entre ambiente e bactérias magnetotáticas |
| Beneficiário: | Luigi Jovane |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular |
| Processo FAPESP: | 11/22018-3 - Avaliação da produtividade primária marinha através do estudo das bactérias magnetotáticas em sedimentos |
| Beneficiário: | Luigi Jovane |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Jovens Pesquisadores |
| Processo FAPESP: | 14/50820-7 - Marine ferromanganese deposits: a major resource of E-tech elements |
| Beneficiário: | Frederico Pereira Brandini |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |