Personal information

Activities

Employment (1)

Universidade de São Paulo Instituto de Geociências: Sao Paulo, SP, BR

Senior professor (Mineralogia e Geotectônica)
Employment
Source: Self-asserted source
Oswaldo Siga Jr

Education and qualifications (4)

Universidade de São Paulo Instituto de Geociências: Sao Paulo, SP, BR

2005 to 2010 | Livre-Docente
Education
Source: Self-asserted source
Oswaldo Siga Jr

Universidade de São Paulo Instituto de Geociências: Sao Paulo, SP, BR

1990 to 1995 | Doutorado
Education
Source: Self-asserted source
Oswaldo Siga Jr

Universidade de São Paulo Instituto de Geociências: Sao Paulo, SP, BR

1981 to 1986 | Mestrado
Education
Source: Self-asserted source
Oswaldo Siga Jr

Universidade de São Paulo Instituto de Geociências: Sao Paulo, SP, BR

1974 to 1977 | Geology
Education
Source: Self-asserted source
Oswaldo Siga Jr

Works (34)

Tracing the history from Rodinia break-up to the Gondwana amalgamation in the Embu Terrane, southern Ribeira Belt, Brazil

Lithos
2019-10 | Journal article
Part of ISSN: 0024-4937
Contributors: Cláudia R. Passarelli; Sanjeet K. Verma; Ian McReath; Miguel A.S. Basei; Oswaldo Siga
Source: Self-asserted source
Oswaldo Siga Jr via Crossref Metadata Search
grade
Preferred source (of 2)‎

Sensitive High Resolution Ion Microprobe (SHRIMP IIe/MC) of the Institute of Geosciences of the University of São Paulo, Brazil: Analytical method and first results

Geologia USP - Serie Cientifica
2014 | Journal article
EID:

2-s2.0-84908004347

Contributors: Sato, K.; Tassinari, C.C.G.; Basei, M.A.S.; Siga, O.; Onoe, A.T.; De Souza, M.D.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Calymmian (1.50-1.45 Ga) magmatic records in Votuverava and Perau sequences, south-southeastern Brazil: Zircon ages and Nd-Sr isotopic geochemistry

Journal of South American Earth Sciences
2011 | Journal article
EID:

2-s2.0-80052725787

Contributors: Siga Jr., O.; Stipp Basei, M.A.; Sato, K.; Passarelli, C.R.; Nutman, A.; McReath, I.; José dos Prazeres Filho, H.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Crystallization ages of the A-type magmatism of the Graciosa Province (Southern Brazil): Constraints from zircon U-Pb (ID-TIMS) dating of coeval K-rich gabbro-dioritic rocks

Journal of South American Earth Sciences
2011 | Journal article
EID:

2-s2.0-80052717207

Contributors: Vlach, S.R.F.; Siga, O.; Harara, O.M.M.; Gualda, G.A.R.; Basei, M.A.S.; Vilalva, F.C.J.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Extensional and colisional magmatic records in the Apiaí Terrane, South-Southeastern Brazil: Integration of Geochronological U-Pb Zircon Ages

Geologia USP - Serie Cientifica
2011 | Journal article
EID:

2-s2.0-84555196966

Contributors: Siga Jr., O.; Basei, M.A.S.; Nutman, A.; Sato, K.; McReath, I.; Passarelli, C.R.; Liu, D.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Geology and geochronology of the Betara region in south-southeastern Brazil: Evidence for possible Statherian (1.80-1.75Ga) and Calymmian (1.50-1.45Ga) extension events

Gondwana Research
2011 | Journal article
EID:

2-s2.0-78650701034

Contributors: Siga, O.; Cury, L.F.; McReath, I.; de Almeida Leite Ribeiro, L.M.; Sato, K.; Stipp Basei, M.A.; Passarelli, C.R.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Heterogeneity in syntectonic granitoids emplaced in a major shear zone, southern Brazil

Journal of South American Earth Sciences
2011 | Journal article
EID:

2-s2.0-83555174512

Contributors: Passarelli, C.R.; McReath, I.; Stipp Basei, M.T.; Siga, O.; da Costa Campos Neto, M.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Major shear zones of southern Brazil and Uruguay: Escape tectonics in the eastern border of Rio de La plata and Paranapanema cratons during the Western Gondwana amalgamation

International Journal of Earth Sciences
2011 | Journal article
EID:

2-s2.0-79951941905

Contributors: Passarelli, C.R.; Basei, M.A.S.; Wemmer, K.; Siga Jr., O.; Oyhantçabal, P.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Tectonic evolution of the Brusque Group, Dom Feliciano belt, Santa Catarina, Southern Brazil

Journal of South American Earth Sciences
2011 | Journal article
EID:

2-s2.0-83555172252

Contributors: Basei, M.A.S.; Campos Neto, M.C.; Castro, N.A.; Nutman, A.P.; Wemmer, K.; Yamamoto, M.T.; Hueck, M.; Osako, L.; Siga, O.; Passarelli, C.R.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The Itajaí foreland basin: A tectono-sedimentary record of the Ediacaran period, Southern Brazil

International Journal of Earth Sciences
2011 | Journal article
EID:

2-s2.0-79951944397

Contributors: Basei, M.A.S.; Drukas, C.O.; Nutman, A.P.; Wemmer, K.; Dunyi, L.; Santos, P.R.; Passarelli, C.R.; Neto, M.C.C.; Siga Jr., O.; Osako, L.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Contribution of SHRIMP U-Pb zircon geochronology to unravelling the evolution of Brazilian Neoproterozoic fold belts

Precambrian Research
2010 | Journal article
EID:

2-s2.0-78049254899

Contributors: Basei, M.A.S.; Neves, B.B.B.; Siga, O.; Babinski, M.; Pimentel, M.M.; Gaeta Tassinari, C.C.; Hollanda, M.H.B.; Nutman, A.; Cordani, U.G.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Deformation and geochronology of syntectonic granitoids emplaced in the Major Gercino Shear Zone, southeastern South America

Gondwana Research
2010 | Journal article
EID:

2-s2.0-77349095693

Contributors: Passarelli, C.R.; Basei, M.A.S.; Siga Jr., O.; Reath, I.M.; Campos Neto, M.d.C.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Structural and metamorphic control on the exhumation of high-P granulites: The Carvalhos Klippe example, from the oriental Andrelândia Nappe System, southern portion of the Brasília Orogen, Brazil

Precambrian Research
2010 | Journal article
EID:

2-s2.0-77953650600

Contributors: Campos Neto, M.d.C.; Cioffi, C.R.; Moraes, R.; da Motta, R.G.; Siga Jr., O.; Basei, M.A.S.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Chapter 7.2 The Evolution and Tectonic Setting of the Luis Alves Microplate of Southeastern Brazil: An Exotic Terrane during the Assembly of Western Gondwana

Developments in Precambrian Geology
2009 | Book
EID:

2-s2.0-71749121433

Contributors: Basei, M.A.S.; Nutman, A.; Siga, O.; Passarelli, C.R.; Drukas, C.O.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Dating minerals by ID-TIMS geochronology at times of in situ analysis: Selected case studies from the CPGeo-IGc-USP laboratory

Anais da Academia Brasileira de Ciencias
2009 | Journal article
EID:

2-s2.0-62849089708

Contributors: Passarelli, C.R.; Basei, M.A.S.; Siga Jr., O.; Sato, K.; Sproesser, W.M.; Loios, V.A.P.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

In situ isotopic analyses of U and Pb in zircon by remotely operated SHRIMP II, and Hf by LA-ICP-MS: An example of dating and genetic evolution of zircon by <sup>176</sup>Hf/<sup>177</sup>Hf from the Ita quarry in the Atuba Complex, Se Brazil

Geologia USP - Serie Cientifica
2009 | Journal article
EID:

2-s2.0-73549104792

Contributors: Sato, K.; Siga Jr., O.; Da Silva, J.A.; McReath, I.; Dunyi, L.; Iizuka, T.; Rino, S.; Hirata, T.; Sproesser, W.; Basei, M.A.S.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Lower and Upper Neoproterozoic magmatic records in Itaiacoca Belt (Paraná-Brazil): Zircon ages and lithostratigraphy studies

Gondwana Research
2009 | Journal article
EID:

2-s2.0-60349114583

Contributors: Siga Jr., O.; Basei, M.A.S.; Passarelli, C.R.; Sato, K.; Cury, L.F.; McReath, I.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Correlation of Neoproterozoic terranes between the Ribeira Belt, SE Brazil and its African counterpart: comparative tectonic evolution and open questions

Geological Society, London, Special Publications
2008 | Journal article
Part of ISSN: 0305-8719
Part of ISSN: 2041-4927
Source: Self-asserted source
Oswaldo Siga Jr

Tectonic aspects of the granite intrusions from Cerne, Passa Tres and Rio Abaixo, southeast of the pre-Cambrian Parana. Study based on <sup>39</sup> Ar- <sup>40</sup> Ar dating of micas,Aspectos tectônicos das intrusões dos Granitos do Cerne, Passa Três e Rio Abaixo, sudeste do pré-cambriano paranaense. Estudo baseado em Datações <sup>39</sup> Ar- <sup>40</sup> Ar em Micas

Geologia USP - Serie Cientifica
2008 | Journal article
EID:

2-s2.0-45849107282

Contributors: Cury, L.F.; Siga Jr., O.; Harara, O.M.M.; Dos Prazeres Filho, H.J.; Basei, M.A.S.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Structural and geochronological constraints on the evolution of the Juréia Massif, Registro Domain, State of São Paulo, Brazil

Anais da Academia Brasileira de Ciencias
2007 | Journal article
EID:

2-s2.0-34548569909

Contributors: Passarelli, C.R.; Basei, M.A.S.; Prazeres-Filho, H.J.; Siga Jr., O.; Szabó, G.A.J.; Marco-Neto, J.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The alkaline Tunas massif, PR: New geochronological data,O maciço alcalino de Tunas, PR: Novos dados geocronológicos

Geologia USP - Serie Cientifica
2007 | Journal article
EID:

2-s2.0-37249092106

Contributors: Siga Jr., O.; De Barros Gomes, C.; Sato, K.; Passarelli, C.R.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The crystalline basement in the Argentinian north-Patagonian Andes: Geochronology and tectonic interpretation,El basamento cristalino de los Andes norpatagónicos en Argentina: Geocronología e interpretación tectónica

Revista Geologica de Chile
2005 | Journal article
EID:

2-s2.0-24144469378

Contributors: Varela, R.; Basei, M.A.S.; Cingolani, C.A.; Siga Jr., O.; Passarelli, C.R.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Geochronology and isotopic geology of the pre-Cambrian domains of the southeastern region of Sao Paulo State,Geocronologia e Geologia Isotópica dos Terrenos Pré -Cambrianos da Porção Sul-Oriental do Estado de São Paulo

Geologia USP - Serie Cientifica
2004 | Journal article
EID:

2-s2.0-2942657182

Contributors: Passarelli, C.R.; Stipp Basei, M.A.; da Costa Campos Neto, M.; Siga Júnior, O.; dos Prazeres Filho, H.J.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The Agua Clara Formations in the Aracaiba region - Sao Paulo: U-Pb registry of a Mesoproterozoic basin,A Formação Água Clara na Região de Araç aíba - SP: Registro U-Pb de Uma Bacia Mesoproterozóica

Geologia USP - Serie Cientifica
2004 | Journal article
EID:

2-s2.0-2942703858

Contributors: Weber, W.; Siga Jr., O.; Sato, K.; dos Reis Neto, J.M.; Stipp Basei, M.A.; Nutman, A.P.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Middle Proterozoic and Lower Paleozoic of the Sierra de Umango, Andean Foreland (29°S), Argentina: U-Pb ages and isotopic characteristics,Proterozoico medio y Paleozoico inferior de la sierra de Umango, antepaís andino (29°S), Argentina: Edades U-Pb y caracterizaciones isotópicas

Revista Geologica de Chile
2003 | Journal article
EID:

2-s2.0-5444232753

Contributors: Varela, R.; Sato, A.M.; Basei, M.A.S.; Siga Jr., O.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Rock chemistry, U-Pb geochronology and isotopic geology (Sr-Nd-Pb) of the granitic batholiths Cunhaporanga and Três Córregos of the Southern part of the Ribeira Belt in Parana State,Litoquímica, geocronologia U-Pb e geologia isotópica (Sr-Nd-Pb) das Rochas Graníticas dos Batólitos cunhaporanga e três córregos na Porção Sul do Cinturão Ribeira, Estado do Paraná

Geologia USP - Serie Cientifica
2003 | Journal article
EID:

2-s2.0-0141457662

Contributors: dos Prazeres Filho, H.J.; Harara, O.M.; Basei, M.A.S.; Passarelli, C.R.; Siga Jr., O.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The Atuba Complex, Southern South American platform: Archean components and paleoproterozoic to neoproterozoic tectonothermal events

Gondwana Research
2003 | Journal article
EID:

2-s2.0-0142094531

Contributors: Sato, K.; Siga Jr., O.; Nutman, A.P.; Basei, M.A.S.; McReath, I.; Kaulfuss, G.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

U-Pb (Zircon) ages of metavolcanic rocks from the Itaiacoca Group: Tectonic implications

Geologia USP - Serie Cientifica
2003 | Journal article
EID:

2-s2.0-0141795343

Contributors: Siga Jr., O.; Basei, M.A.S.; Sato, K.; dos Prazeres Filho, H.J.; Cury, L.F.; Weber, W.; Passarelli, C.R.; Harara, O.M.; dos Reis Neto, J.M.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Rapid Growth of Continental Crust between 2.2 to 1.8 Ga in the South American Platform: Integrated Australian, European, North American and SW USA Crustal Evolution Study

Gondwana Research
2002 | Journal article
EID:

2-s2.0-0142125000

Contributors: Sato, K.; Siga Jr., O.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

U-Pb (zircon) dating of the deformed alkaline granites of Betara and Tigre: Evidence for extensional regimes in the Apiai Belt

Geologia USP - Serie Cientifica
2002 | Journal article
EID:

2-s2.0-0141572143

Contributors: Cury, L.F.; Kaulfuss, G.A.; Siga Jr., O.; Basei, M.A.S.; Harara, O.M.; Sato, K.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Mesoarchean Orthogneiss in the Atuba Complex in a Neoproterozoic Brasiliano Mobile Belt in SE Brazil: An Integrated IDTIMS, EVTIMS and SHRIMP Zircon Dating Study

Gondwana Research
2001 | Journal article
EID:

2-s2.0-0346608368

Contributors: Sato, K.; Nutman, A.P.; Siga Jr., O.; Basei, M.A.S.; Walter, S.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

Volcanism and stratigraphy of the neoproterozoic Campo Alegre Basin, SC, Brazil

Anais da Academia Brasileira de Ciencias
2001 | Journal article
EID:

2-s2.0-0040150497

Contributors: Citroni, S.B.; Basei, M.A.S.; Siga Jr., O.; Dos Reis Neto, J.M.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The Santa Catarina Granulite Complex of Southern Brazil: A Review

Gondwana Research
1998 | Journal article
EID:

2-s2.0-0001435668

Contributors: Basei, M.A.S.; McReath, I.; Siga Jr., O.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier

The Atuba Complex: a Paleoproterozoic belt intensively reworked in the Neoproterozoic,O Complexo Atuba: um cinturao paleoproterozoico intensamente retrabalhado no Neoproterozoico

Boletim IG - Universidade de Sao Paulo, Instituto de Goeciencias
1995 | Journal article
EID:

2-s2.0-0029420830

Contributors: Siga Junior, O.; Basei, M.A.S.; Reis Neto, J.M.; Machiavelli, A.; Harara, O.M.
Source: Self-asserted source
Oswaldo Siga Jr via Scopus - Elsevier