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| Author(s): |
Nuria Lahuerta Pineiro
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto Oceanográfico (IO/DIDC) |
| Defense date: | 2014-02-06 |
| Examining board members: |
Michel Michaelovitch de Mahiques;
Carla Van Der Haagen Custodio Bonetti;
Rubens Cesar Lopes Figueira
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| Advisor: | Michel Michaelovitch de Mahiques |
| Abstract | |
The Rio de La Plata (RdlP) and the Uruguayan east shore represent a complex area. In order to characterize terrestrial sediment transport and to figure out the sedimentary record, different kind of proxies were used, both abiotic: bulk organic matter (δ13C, δ15N and C/N), terrestrial contribution (Al and Ti, Fe/Ca and Ti/Ca), productivity (Corg, Nt, CaCO3, Si, P, Ca, Ba, Al/Ti, Fe/Al, Ba/Al and Ba/Ti), environmental energy indicators (grain size), and biological proxies: tecamoebians and ostracoda, which are extremely susceptive to salinity changes, and benthic foraminifera as a environmental characteristics integrator. All analysed proxies reflected the difference between terrestrial versus marine gradient downstream on the RdlP, caused by the Paraná and Uruguay rivers discharge, versus marine water inlet upstream. In the oceanic region, the gradient was northward, caused by RdlP plume and terrestrial discharge from Maldonado and Rocha Department rivers and lagoons. This dissertation represents one of the first multiproxy approach, which reveals the sediment record in this area and, which guarantees the good perspectives for subsequent environmental and paleoenvironmental studies. (AU) | |
| FAPESP's process: | 11/14765-3 - Determination of terrigenous vs marine influencial along the Río de La Plata - South Atlantic Ocean environmental gradient, using benthic foraminifera analysis associated to sedimentary geochemist |
| Grantee: | Nuria Lahuerta Pineiro |
| Support Opportunities: | Scholarships in Brazil - Master |