The late- to postorogenic transition in the Apiaí domain, SE Brazil: Constraints from the petrogenesis of the Neoproterozoic Agudos Grandes Granite Batholith

2007 ◽  
Vol 23 (2-3) ◽  
pp. 213-235 ◽  
Author(s):  
Renato Jordan Leite ◽  
Valdecir de Assis Janasi ◽  
Robert A. Creaser ◽  
Larry M. Heaman
Keyword(s):  
Se Brazil ◽  
Granite Batholith

Age and magnetic fabric of the Três Córregos granite batholith: evidence for Ediacaran transtension in the Ribeira Belt (SE Brazil)

2013 ◽  
Vol 102 (6) ◽  
pp. 1563-1581 ◽  
Author(s):  
Carlos A. Salazar ◽  
Carlos J. Archanjo ◽  
Sérgio W. de O. Rodrigues ◽  
Maria Helena B. M. Hollanda ◽  
Dunyi Liu
Keyword(s):  
Magnetic Fabric ◽  
Se Brazil ◽  
Granite Batholith

The late- to postorogenic transition in the Neoproterozoic Agudos Grandes Granite Batholith (Apiaí Domain, SE Brazil): Constraints from geology, mineralogy, and U–Pb geochronology

2007 ◽  
Vol 23 (2-3) ◽  
pp. 193-212 ◽  
Author(s):  
Renato Jordan Leite ◽  
Larry M. Heaman ◽  
Valdecir de Assis Janasi ◽  
Lucelene Martins ◽  
Robert A. Creaser
Keyword(s):  
Se Brazil ◽  
Granite Batholith

Bulk, isotopic, petrographic organic matter and mineral distribution as proxies of environmental process in Guanabara Bay, SE, Brazil

2021 ◽  
Vol 41 (3) ◽  
Author(s):  
R. C. Cordeiro ◽  
D. D. dos Santos ◽  
R. E. Santelli ◽  
A. G. Figueiredo ◽  
L. S. Moreira ◽  
...  
Keyword(s):  
Organic Matter ◽  
Guanabara Bay ◽  
Mineral Distribution ◽  
Se Brazil ◽  
Environmental Process

Carbon accumulation rates recorded in the last 150 years in tropical high mountain peatlands of the Atlantic Rainforest, SE - Brazil

2017 ◽  
Vol 579 ◽  
pp. 439-446 ◽  
Author(s):  
Lúcio F. Lourençato ◽  
Pedro P. Caldeira ◽  
Marcelo C. Bernardes ◽  
Andressa C. Buch ◽  
Daniel C. Teixeira ◽  
...  
Keyword(s):  
Carbon Accumulation ◽  
Atlantic Rainforest ◽  
High Mountain ◽  
Accumulation Rates ◽  
Se Brazil ◽  
Carbon Accumulation Rates ◽  
Mountain Peatlands

scholarly journals Nutrient behavior in a highly-eutrophicated tropical estuarine system

2016 ◽  
Vol 28 (0) ◽  
Author(s):  
Nilva Brandini ◽  
◽  
Ana Paula de Castro Rodrigues ◽  
Ilene Matanó Abreu ◽  
Luiz Carlos Cotovicz Junior ◽  
...  
Keyword(s):  
Organic Matter ◽  
Chlorophyll A ◽  
River Mouth ◽  
Nutrient Concentrations ◽  
Phytoplankton Production ◽  
Small Scale ◽  
Estuarine System ◽  
Temperature Conductivity ◽  
Se Brazil ◽  
Iguaçu River

Abstract Aim: There are few studies dealing with the biogeochemical processes occurring in small estuaries receiving high sewage loading in tropical regions. The aim of this investigation was to characterize the biogeochemical behavior of nutrients in superficial waters collected at the Iguaçu estuarine system, during specific conditions (neap tide), located at the inner sector of a heavily eutrophicated embayment (Guanabara Bay, SE Brazil). Methods Physical and chemical variables were measured in situ (pH, temperature, conductivity, salinity, total dissolved solids, transparency, dissolved oxygen), whereas suspended particulate matter, chlorophyll a, phaepigments and nutrients (carbon, nitrogen and phosphorus forms) were measured in laboratory across the mesohaline estuarine gradient. Results The Iguaçu River mouth is in a high stage of eutrophication, considering nutrient concentrations, chlorophyll a and transparency of water column. Results indicate a transition from heterotrophic conditions to autotrophic conditions, since the nutrients concentrations showed a decreasing pattern along the saline gradient, while the chlorophyll an increased over the transects. The pH values and chlorophyll : phaeopigments ratios are significantly related to the amount and quality of organic matter contents, especially at transects under strong marine influence. More than 95% of the dissolved and total nitrogen concentrations are represented by NH4+ contributions, which are related to the ammonification of organic matter contents in this region, indicating the existence of untreated sewage loads in this area. Conclusion In this study, the Iguaçu River seemed to contribute with high inputs of nutrients that support important phytoplankton production at the inner regions of the bay related to the CO2 sink and autotrophic metabolism, showing the importance of verifying the biogeochemical behaviors of nutrients in estuarine areas, even in small scale.

Reconstruction of multiple P-T-t stages from retrogressed mafic rocks: Subduction versus collision in the Southern Brasília orogen (SE Brazil)

Lithos ◽  
2017 ◽  
Vol 294-295 ◽  
pp. 283-303 ◽  
Author(s):  
Mahyra Tedeschi ◽  
Pierre Lanari ◽  
Daniela Rubatto ◽  
Antônio Pedrosa-Soares ◽  
Jörg Hermann ◽  
...  
Keyword(s):  
Mafic Rocks ◽  
Se Brazil
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