| Texto completo | |
| Autor(es): |
Maly, Mascimiliano
[1]
;
Schattner, Uri
[2]
;
Jose Lobo, Francisco
[3]
;
Soares Dias, Rodolfo Jasao
[1]
;
Ramos, Raissa Basti
[1]
;
Couto, Daniel de Matos
[1]
;
Gomes Sumida, Paulo Yukio
[1]
;
de Mahiques, Michel Michaelovitch
[1, 4]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Oceanog Inst, Sao Paulo, SP - Brazil
[2] Univ Haifa, Leon H Charney Sch Marine Sci, Dr Moses Strauss Dept Marine Geosci, Haifa - Israel
[3] Univ Granada, CSIC, Inst Andaluz Ciencias Tierra, Armilla - Spain
[4] Univ Sao Paulo, Inst Energy & Environm, Sao Paulo, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SCIENTIFIC REPORTS; v. 9, DEC 10 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
Recently acquired bathymetric and high-resolution seismic data from the upper slope of Santos Basin, southern Brazilian margin, reveal a major geomorphological feature in the SW Atlantic that is interpreted as a carbonate ridge - the Alpha Crucis Carbonate Ridge (ACCR). The ACCR is the first megastructure of this type described on the SW Atlantic margin. The -17 x 11-km-wide ring-shaped ACCR features tens of >100-m-high steep-sided carbonate mounds protruding from the surrounding seabed and flanked by elongated depressions. Comet-like marks downstream of the mound structures indicate that the area is presently influenced by the northward flow of the Intermediate Western Boundary Current (IWBC), a branch of the Subtropical Gyre that transports Antarctic Intermediate Water. Abundant carbonate sands and gravels cover the mounds and are overlain by a biologically significant community of living and dead ramified corals and associated invertebrates. The IWBC acts as a hydrodynamic factor that is responsible for both shaping the bottom and transporting coral larvae. We contend that the ACCR was formed by upward fluid flow along active sub-surface faults and fractures that formed by lateral extension generated by the ascending movement of salt diapirs at depth. The ACCR provides an important modern and accessible analogue for a seabed carbonate build-up related to sub-surface hydrocarbon systems. (AU) | |
| Processo FAPESP: | 15/17763-2 - Mudbelts do Sul e Sudeste do Brasil: implicações sobre as influências antrópicas no ambiente marinho |
| Beneficiário: | Márcia Caruso Bícego |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 16/22194-0 - Feições anômalas de fundo no talude superior do Sul do Brasil |
| Beneficiário: | Michel Michaelovitch de Mahiques |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/50191-8 - Dymamics of salt dome exhumation on the ocean floor, focusing on Santos basin offshore Brazil |
| Beneficiário: | Michel Michaelovitch de Mahiques |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 14/08266-2 - Feições morfológicas do talude continental da margem Sudeste do Brasil: tectônica ativa versus condições oceanográficas modernas |
| Beneficiário: | Michel Michaelovitch de Mahiques |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |