| Full text | |
| Author(s): |
Assine, Mario Luis
[1]
;
Merino, Eder Renato
[1]
;
Pupim, Fabiano do Nascimento
[2]
;
Macedo, Hudson de Azevedo
[1]
;
Martinho dos Santos, Mauricio Guerreiro
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Paulista, IGCE, Rio Claro, SP - Brazil
[2] Univ Sao Paulo, Inst Geociencias, BR-01498 Sao Paulo, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | BRAZILIAN JOURNAL OF GEOLOGY; v. 45, n. 3, p. 475-489, SEP 2015. |
| Web of Science Citations: | 16 |
| Abstract | |
ABSTRACT The Pantanal Basin is an active sedimentary basin in central-west Brazil that consists of a complex alluvial systems tract characterized by the interaction between different river systems developed in one of the largest wetlands in the world. The Paraguay River is the trunk river system that drains the water and part of the sediment load received from areas outside of the basin. Depositional styles vary considerably along the river profiles throughout the basin, with the development of entrenched meandering belts, anastomosing reaches, and floodplain ponds. Paleodrainage patterns are preserved on the surface of abandoned lobes of fluvial fans, which also exhibit many degradational channels. Here, we propose a novel classification scheme according to which the geomorphology, hydrological regime and sedimentary dynamics of these fluvial systems are determined by the geology and geomorphology of the source areas. In this way, the following systems are recognized and described: (I) the Paraguay trunk-river plains; (II) fluvial fans sourced by the tablelands catchment area; (III) fluvial fans sourced by lowlands; and (IV) fluvial interfans. We highlight the importance of considering the influences of source areas when interpreting contrasting styles of fluvial architectures in the rock record. (AU) | |
| FAPESP's process: | 14/23334-4 - Coupling Optically Stimulated Luminescence (OSL) and Terrestrial Cosmogenic Nuclides (TCN) analysis to reconstruct changes in the Amazonian fluvial system in the Late Cenozoic (<5 Ma) |
| Grantee: | Fabiano Do Nascimento Pupim |
| Support type: | Scholarships in Brazil - Post-Doctorate |
| FAPESP's process: | 14/06889-2 - Paleohydrological changes, chronology of events and sediment dynamics in the quaternary of the Pantanal Wetland |
| Grantee: | Mario Luis Assine |
| Support type: | Research Program on Global Climate Change - Regular Grants |
| FAPESP's process: | 14/13937-3 - Comparative analysis of modern fluvial systems and the rock record: outcrop-scale analogue modelling for the palaeoenvironmental interpretation of fluvial deposits |
| Grantee: | Maurício Guerreiro Martinho dos Santos |
| Support type: | Scholarships in Brazil - Post-Doctorate |