Insights on the magmatism, crustal evolution and metallogenesis of the Amazonian craton

2009 ◽  
Vol 27 (2-3) ◽  
pp. 109-112
Author(s):  
Roberto Dall’Agnol ◽  
Reinhardt A. Fuck ◽  
Raimundo Netuno Nobre Villas
Keyword(s):  
Crustal Evolution ◽  
Amazonian Craton

scholarly journals Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite

2017 ◽  
Vol 47 (2) ◽  
pp. 275-299 ◽  
Author(s):  
Bruna Karine Correa Nogueira ◽  
Paulo Sergio de Sousa Gorayeb ◽  
Elton Luiz Dantas ◽  
Rafael Estumano Leal ◽  
Marco Antonio Galarza
Keyword(s):  
Shear Zones ◽  
Crustal Evolution ◽  
Calc Alkaline ◽  
Isotopic Data ◽  
Crust Formation ◽  
Magmatic Arc ◽  
Continental Arc ◽  
Amazonian Craton ◽  
Granitoid Rocks ◽  
Geochemical Studies

ABSTRACT: The São Luís Cráton comprises an area between northeast Pará state and northwest Maranhão that exposes Paleoproterozoic granitic suites and meta-volcanosedimentary sequences. In the east of this geotectonic unit, about 70 km south of São Luís, there is a portion of the São Luís Craton, represented by the intrusive Rosario Suite (RS). This work is focused on rocks of this suite, including petrographic, lithochemical and geochronological studies to understand the crustal evolution of these granitoid rocks. The rock spectrum varies from tonalitic to granodioritic, quartz dioritic and granitic compositions, and there are partial structural and mineralogical changes related to deformation along transcurrent shear zones. The geochemical studies show granitic metaluminous compositions of the calc-alkaline series with I-type affinity typical of magmatic arc. Rare earth elements show marked fractionation and slight Eu positive or negative anomalies (Eu/Eu* = 0.82 to 1.1). Zircon U-Pb data provided consistent ages of 2165 ± 7 Ma, 2170 ± 7 Ma, 2170 ± 7 Ma, 2161 ± 4 Ma and 2175 ± 8 Ma, dating emplacement of these granitoids as Paleoproterozoic (Rhyacian). Sm-Nd isotopic data provided model ages (TDM) of 2.21 to 2.31 Ga with positive values of εNd +1.9 to +3.2 (t = 2.17 Ga), indicating predominantly Rhyacian crustal sources for the parental magmas, similar to those ones found in other areas of the São Luís Craton. The data, integrated with published geological and geochronological information, indicate the occurrence of an important continental crust formation event in this area. The Paleoproterozoic evolution between 2.17 and 2.15 Ga is related to the Transamazonian orogeny. The granitoids of the Rosario Suite represent the main phase of continental arc magmatism that has continuity in other parts of the São Luís Craton and can be correlated with Rhyacian accretionary magmatism in the northwestern portion of the Amazonian Craton that amalgamated Archean terrains during the Transamazonian orogeny.

scholarly journals The Imataca Complex, NW Amazonian Craton, Venezuela: Crustal evolution and integration of geochronological and petrological cooling histories

Episodes ◽  
2004 ◽  
Vol 27 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Colombo C.G. Tassinari ◽  
José M. U. Munhá ◽  
Wilson Teixeira ◽  
Teresa Palácios ◽  
Allen P. Nutman ◽  
...  
Keyword(s):  
Crustal Evolution ◽  
Amazonian Craton

Orosirian magmatic episodes in the erepecuru-trombetas domain (southeastern Guyana shield): Implications for the crustal evolution of the Amazonian craton

2018 ◽  
Vol 85 ◽  
pp. 278-297 ◽  
Author(s):  
Rafael Estumano Leal ◽  
Jean Michel Lafon ◽  
Lúcia Travassos da Rosa-Costa ◽  
Elton Luiz Dantas
Keyword(s):  
Crustal Evolution ◽  
Amazonian Craton

Archean granitoid magmatism in the Canaã dos Carajás area: Implications for crustal evolution of the Carajás province, Amazonian craton, Brazil

2013 ◽  
Vol 227 ◽  
pp. 157-185 ◽  
Author(s):  
G.R.L. Feio ◽  
R. Dall’Agnol ◽  
E.L. Dantas ◽  
M.J.B. Macambira ◽  
J.O.S. Santos ◽  
...  
Keyword(s):  
Crustal Evolution ◽  
Granitoid Magmatism ◽  
Amazonian Craton ◽  
Carajás Province

RbSr chronology of Precambrian crustal evolution in Rondônia (western margin of the Amazonian craton), Brazil

1989 ◽  
Vol 2 (2) ◽  
pp. 163-170 ◽  
Author(s):  
H.N.A. Priem ◽  
E.H. Bon ◽  
E.A.Th. Verdurmen ◽  
J. Silva Bettencourt
Keyword(s):  
Crustal Evolution ◽  
Western Margin ◽  
Amazonian Craton

Petrology and crustal evolution of the Tartarugal Grande Granulitic Complex - Northeastern Amazonian Craton

2021 ◽  
Vol 112 ◽  
pp. 103549
Author(s):  
Paulo Sergio de Sousa Gorayeb ◽  
Hanna Paula Sales Paiva ◽  
Jean-Michel Lafon ◽  
Lúcia Travassos Rosa-Costa ◽  
Elton Luiz Dantas
Keyword(s):  
Crustal Evolution ◽  
Amazonian Craton

Crustal Evolution and Metallogeny in India

2009 ◽  
Author(s):  
Sanjib Chandra Sarkar ◽  
Anupendu Gupta
Keyword(s):  
Crustal Evolution
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