Volcanic cycles and setting in the Neoproterozoic III to Ordovician Camaquã Basin succession in southern Brazil: characteristics of post-collisional magmatism

2002 ◽  
Vol 118 (1-2) ◽  
pp. 261-283 ◽  
Author(s):  
W Wildner ◽  
E.F Lima ◽  
L.V.S Nardi ◽  
C.A Sommer
Keyword(s):  
Southern Brazil ◽  
Volcanic Cycles

scholarly journals The evolution of Neoproterozoic magmatism in Southernmost Brazil: shoshonitic, high-K tholeiitic and silica-saturated, sodic alkaline volcanism in post-collisional basins

2006 ◽  
Vol 78 (3) ◽  
pp. 573-589 ◽  
Author(s):  
Carlos A. Sommer ◽  
Evandro F. Lima ◽  
Lauro V. S. Nardi ◽  
Joaquim D. Liz ◽  
Breno L. Waichel
Keyword(s):  
Compositional Variation ◽  
Alkaline Magmatism ◽  
Southern Brazil ◽  
Bimodal Volcanism ◽  
High K ◽  
Mantle Sources ◽  
Heterogeneous Mantle ◽  
Orogenic Cycle ◽  
Neoproterozoic Magmatism ◽  
Volcanic Cycles

The Neoproterozoic shoshonitic and mildly alkaline bimodal volcanism of Southernmost Brazil is represented by rock assemblages associated to sedimentary successions, deposited in strike-slip basins formed at the post-collisional stages of the Brasilian/Pan-African orogenic cycle. The best-preserved volcano sedimentary associations occur in the Camaquã and Campo Alegre Basins, respectively in the Sul-riograndense and Catarinense Shields and are outside the main shear belts or overlying the unaffected basement areas. These basins are characterized by alternation of volcanic cycles and siliciclastic sedimentation developed dominantly on a continental setting under subaerial conditions. This volcanism and the coeval plutonism evolved from high-K tholeiitic and calc-alkaline to shoshonitic and ended with a silica-saturated sodic alkaline magmatism, and its evolution were developed during at least 60 Ma. The compositional variation and evolution of post-collisional magmatism in southern Brazil are interpreted as the result mainly of melting of a heterogeneous mantle source, which includes garnet-phlogopite-bearing peridotites, veined-peridotites with abundant hydrated phases, such as amphibole, apatite and phlogopite, and eventually with the addition of an asthenospheric component. The subduction-related metasomatic character of post-collisional magmatism mantle sources in southern Brazil is put in evidence by Nb-negative anomalies and isotope features typical of EM1 sources.

Validation of a screening instrument for postpartum depression in Southern Brazil

2009 ◽  
pp. 1-11
Author(s):  
Carlos Zubaran ◽  
Katia Foresti ◽  
Marina Verdi Schumacher ◽  
Aline Luz Amoretti ◽  
Lucia Cristina Muller ◽  
...  
Keyword(s):  
Postpartum Depression ◽  
Screening Instrument ◽  
Southern Brazil

LATE QUATERNARY GEOLOGICAL HISTORY OF RIO GRANGE DO SUL COASTAL PLAIN, SOUTHERN BRAZIL

2000 ◽  
Vol 30 (3) ◽  
pp. 474-476 ◽  
Author(s):  
LUIZ JOSÉ TOMAZELLI ◽  
SÉRGIO REBELLO DILLENBURG ◽  
JORGE ALBERTO VILLWOCK
Keyword(s):  
Coastal Plain ◽  
Late Quaternary ◽  
Geological History ◽  
Southern Brazil ◽  
History Of

Cyclone Bomb hits Southern Brazil in 2020

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Ricardo Gobato ◽  
Alireza Heidari
Keyword(s):  
High Pressure ◽  
Atmospheric Pressure ◽  
High Speed ◽  
Satellite Images ◽  
The State ◽  
Southern Brazil ◽  
Santa Catarina ◽  
High Area ◽  
South Of Brazil ◽  
Rapid Drop

An “explosive extratropical cyclone” is an atmospheric phenomenon that occurs when there is a very rapid drop in central atmospheric pressure. This phenomenon, with its characteristic of rapidly lowering the pressure in its interior, generates very intense winds and for this reason it is called explosive cyclone, bomb cyclone. With gusts recorded of 116 km/h, atmospheric phenomenon – “cyclone bomb” (CB) hit southern Brazil on June 30, the beginning of winter 2020, causing destruction in its influence over. One of the cities most affected was Chapecó, west of the state of Santa Catarina. The satellite images show that the CB generated a low pressure (976 mbar) inside it, generating two atmospheric currents that moved at high speed. In a northwest-southeast direction, Bolivia and Paraguay, crossing the states of Parana and Santa Catarina, and this draft that hit the south of Brazil, which caused the destruction of the affected states.  Another moving to Argentina, southwest-northeast direction, due to high area of high pressure (1022 mbar). Both enhanced the phenomenon.

COVID-19 Seroprevalence in Military Police Forces, Southern Brazil

2020 ◽  
Author(s):  
Alessandro C. Pasqualotto ◽  
Paula de Castro Pereira ◽  
Daiane F. Dalla Lana ◽  
Alexandre V. Schwarzbold ◽  
Marco Ribeiro ◽  
...  
Keyword(s):  
Southern Brazil ◽  
Military Police ◽  
Police Forces

Risk factors for low birth weight in a rural community in southern Brazil

1996 ◽  
Vol 72 (6) ◽  
pp. 369-373 ◽  
Author(s):  
Ricardo Halpern ◽  
Earl S. Schaefer ◽  
Airton S. Pereira ◽  
Ernesto M. Arnt ◽  
Jandira Pureza Valente Bezerra ◽  
...  
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Rural Community ◽  
Southern Brazil
Sign in / Sign up

Export Citation Format

Share Document