Tectono-sedimentary evolution of sedimentary basins from Late Paleoproterozoic to Late Neoproterozoic in the São Francisco craton and Araçuaı́ fold belt, eastern Brazil

2001 ◽  
Vol 141-142 ◽  
pp. 343-370 ◽  
Author(s):  
M.A Martins-Neto ◽  
A.C Pedrosa-Soares ◽  
S.A.A Lima
Keyword(s):  
Sedimentary Basins ◽  
Fold Belt ◽  
Sedimentary Evolution ◽  
Eastern Brazil ◽  
Late Neoproterozoic

GENESIS OF NEOPROTEROZOIC GRANITOID MAGMATISM IN THE EASTERN ARAÇUAÍ FOLD BELT, EASTERN BRAZIL: FIELD, GEOCHEMICAL AND SR ND ISOTOPIC EVIDENCE.

2000 ◽  
Vol 30 (1) ◽  
pp. 135-139 ◽  
Author(s):  
JOIL JOSÉ CELINO ◽  
NILSON FRANCISQUINI BOTELHO ◽  
MÁRCIO MARTINS PIMENTEL
Keyword(s):  
Fold Belt ◽  
Granitoid Magmatism ◽  
Isotopic Evidence ◽  
Eastern Brazil

Tectonic evolution of the Northern Volcanic Zone, Abitibi belt, Quebec

1992 ◽  
Vol 29 (10) ◽  
pp. 2211-2225 ◽  
Author(s):  
E. H. Chown ◽  
Réal Daigneault ◽  
Wulf Mueller ◽  
J. K. Mortensen
Keyword(s):  
Structural Evolution ◽  
Sedimentary Basins ◽  
Volcanic Zone ◽  
Tectonic Model ◽  
Sedimentary Evolution ◽  
Southern Volcanic Zone ◽  
Oblique Convergence ◽  
Northern Volcanic Zone ◽  
Abitibi Subprovince ◽  
Felsic Volcanic

The Archean Abitibi Subprovince has been divided formally into a Northern Volcanic Zone (NVZ), including the entire northern part of the subprovince, and a Southern Volcanic Zone (SVZ) on the basis of distinct volcano-sedimentary successions, related plutonic suites, and precise U–Pb age determinations. The NVZ has been further formally subdivided into (i) a Monocyclic Volcanic Segment (MVS) composed of an extensive subaqueous basalt plain with scattered felsic volcanic complexes (2730–2725 Ma), interstratified with or overlain by linear volcaniclastic sedimentary basins; and (ii) a Polycyclic Volcanic Segment (PVS) comprising a second mafic–felsic volcanic cycle (2722–2711 Ma) and a sedimentary assemblage with local shoshonitic volcanic rocks.A sequence of deformational events (D1–D6) over a period of 25 Ma in the NVZ is consistent with a major compressional event. North–south shortening was first accommodated by near-vertical east-trending folds and, with continued deformation, was concentrated along major east-trending fault zones and contact-strain aureoles around synvolcanic intrusions, both with a downdip movement. Subsequent dextral strike-slip movement occurred on southeast-trending faults and major east-trending faults which controlled the emplacement of syntectonic plutons (2703–2690 Ma).This study suggests that the NVZ, which is a coherent geotectonic unit, initially formed as a diffuse volcanic arc, represented by the MVZ, in which the northern part, represented by the PVS, evolved into a mature arc as documented by a second volcanic and sedimentary cycle associated with major plutonic accretion. Volcano-sedimentary evolution and associated plutonism, as well as structural evolution, are best explained by a plate-tectonic model involving oblique convergence.

scholarly journals ARCABOUÇO TECTÔNICO E ESTRATIGRÁFICO DA FAIXA RIACHO DO PONTAL, DIVISA PERNAMBUCO-PIAUI-BAHIA

2013 ◽  
Author(s):  
Fabrício de Andrade Caxito ◽  
Alexandre Uhlein
Keyword(s):  
Plate Tectonics ◽  
Central Zone ◽  
Fold Belt ◽  
Northern Margin ◽  
External Zone ◽  
Metasedimentary Rocks ◽  
Late Neoproterozoic ◽  
Brasiliano Orogeny ◽  
Augen Gneiss ◽  
Ocean Ridge

A faixa brasiliana Riacho do Pontal bordeja a margem norte do Cráton do São Francisco e pode ser subdividida em três domíniosou zonas tectônicas de características geológicas contrastantes, de norte para sul: zonas Interna, Central, e Externa. A Zona Interna édominada por rochas metavulcanosedimentares intrudidas por rochas plutônicas relacionadas à Orogênese Cariris Velhos (augen-gnaissesda Suíte Afeição, ~1.0-0.9 Ga). A Zona Central é caracterizada pelo Complexo Monte Orebe, composto por metabasaltos de geoquímicasimilar aos basaltos de cadeia oceânica e rochas metassedimentares de ambiente marinho profundo. A Zona Externa é caracterizada pelosistema de nappes Casa Nova, composto por duas unidades: A Formação Barra Bonita na base, que representa uma sequência plataformaldesenvolvida na borda norte do paleocontinente São Francisco; e a Formação Mandacaru no topo, que representa uma sequência marinhaprofunda turbidítica, provavelmente sin-orogênica. Essas rochas foram afetadas por deformação compressiva (D1-D2-D3) com odesenvolvimento do sistema de nappes vergentes para sul, durante o Neoproterozoico (~630-575 Ma), seguida por deformaçãotranscorrente (D4) nos estágios tardios da Orogênese Brasiliana. Toda a faixa é intrudida por múltiplas gerações de plútons graníticos esieníticos sin a pós-colisionais, de idade neoproterozóica a cambriana (~630-530 Ma). A Faixa Riacho do Pontal representa um ciclo deplacas tectônicas completo no Neoproterozoico tardio, envolvendo a colisão do cráton do São Francisco a sul com os blocos litosféricos daProvíncia Borborema a norte.Palavras chave: Orogênese Brasiliana, Faixa Riacho do Pontal, Cráton do São Francisco ABSTRACTTECTONIC AND STRATIGRAPHIC FRAMEWORK OF THE RIACHO DO PONTAL FOLD BELT, PERNAMBUCO-PIAUI-BAHIA BORDER.The Riacho do Pontal Fold Belt borders the northern margin of the São Francisco Craton and can be subdivided into three tectonic domainsor zones of distinct geology, from north to south: the Internal, Central, and External zones. The Internal Zone is composed bymetavulcanosedimentary rocks intruded by plutonic rocks related to the Cariris Velhos Orogeny (Afeição Suite augen-gneiss, ~1.0-0.9 Ga);rocks of this age are absent in the other zones. The Central Zone is characterized by the Monte Orebe Complex, composed by metabasaltswhose geochemistry is similar to mid-ocean ridge basalts and deep marine metasedimentary rocks. The External Zone is characterized bythe Casa Nova nappe system, composed by two units: (a) the Barra Bonita Formation at the base, representing a platformal sequencedeveloped at the northern São Francisco Craton margin; and (b) the Mandacaru Formation at the top, which represents a syn-orogenicdeep marine unit. These rocks were affected by compressive deformation (D1-D2-D3) with the development of a south-verging nappesystem, during the Neoproterozoic (~630-575 Ma), followed by strike-slip deformation (D4) at the late stages of the Brasiliano Orogeny.The whole fold belt is intruded by multiple generations of syn- to post-collisional granitic and syenitic plutons, of Neoproterozoic toCambrian age (~630-530 Ma). The Riacho do Pontal Fold Belt represents a complete plate tectonics cycle at the late Neoproterozoic,involving the collision of the São Francisco Craton to the South with the crustal blocks of the Borborema Province towards North.Keywords: Brasiliano Orogeny, Riacho do Pontal Fold Belt, São Francisco Craton

Provenance of detrital zircons from the late Neoproterozoic to Ordovician sandstones of South China: implications for its continental affinity

2010 ◽  
Vol 147 (6) ◽  
pp. 974-980 ◽  
Author(s):  
LONG WU ◽  
DONG JIA ◽  
HAIBIN LI ◽  
FEI DENG ◽  
YIQUAN LI
Keyword(s):  
South China ◽  
Detrital Zircons ◽  
Fold Belt ◽  
Late Neoproterozoic ◽  
Early Palaeozoic

AbstractThe U–Pb geochronology of 687 detrital zircons from the voluminous Upper Neoproterozoic–Ordovician succession in the Wuyishan Fold Belt of South China reveals a common dominant c. 1200–950 Ma group, indicative of an outboard provenance terrane with a Grenville-age province to the southeast during the late Neoproterozoic–Early Palaeozoic. Compared with coeval samples from the Gondwanan and eastern Laurentian margins, our data show a scarcity of distinctive Gondwanan provenances (c. 650–500 Ma) and reveal some Laurentian signatures. These results argue against the peri-Gondwanan setting for South China during the late Neoproterozoic–Ordovician, instead implying a Laurentian affinity.

scholarly journals Modeling of wind gap formation and development of sedimentary basins during fold growth: application to the Zagros Fold Belt, Iran

2016 ◽  
Vol 41 (11) ◽  
pp. 1521-1535 ◽  
Author(s):  
Marine Collignon ◽  
Philippe Yamato ◽  
Sébastien Castelltort ◽  
Boris J. P. Kaus
Keyword(s):  
Sedimentary Basins ◽  
Fold Belt ◽  
Gap Formation

scholarly journals Provenance connections between late Neoproterozoic and early Palaeozoic sedimentary basins of the Ross Sea region, Antarctica, south-east Australia and southern Zealandia

2013 ◽  
Vol 26 (2) ◽  
pp. 173-182 ◽  
Author(s):  
C.J. Adams ◽  
J.D. Bradshaw ◽  
T.R. Ireland
Keyword(s):  
Detrital Zircon ◽  
Ross Sea ◽  
Regional Scale ◽  
Sedimentary Basins ◽  
Zircon Age ◽  
Gondwana Margin ◽  
Age Patterns ◽  
Transantarctic Mountains ◽  
Late Neoproterozoic ◽  
Early Palaeozoic

AbstractThick successions of turbidites are widespread in the Ross–Delamerian and Lachlan orogens and are now dispersed through Australia, Antarctica and New Zealand. U-Pb detrital zircon age patterns for latest Precambrian, Cambrian and Ordovician metagreywackes show a closely related provenance. The latest Neoproterozoic–early Palaeozoic sedimentary rocks have major components, at c. 525, 550, and 595 Ma, i.e. about 40–80 million years older than deposition. Zircons in these components increase from the Neoproterozoic to Ordovician. Late Mesoproterozoic age components, 1030 and 1070 Ma, probably originate from igneous/metamorphic rocks in the Gondwanaland hinterland whose exact locations are unknown. Although small, the youngest zircon age components are coincident with estimated depositional ages suggesting that they reflect contemporaneous and minor, volcanic sources. Overall, the detrital zircon provenance patterns reflect the development of plutonic/metamorphic complexes of the Ross–Delamerian Orogen in the Transantarctic Mountains and southern Australia that, upon exhumation, supplied sediment to regional scale basin(s) at the Gondwana margin. Tasmanian detrital zircon age patterns differ from those seen in intra-Ross Orogen sandstones of northern Victoria Land and from the oldest metasediments in the Transantarctic Mountains. A comparison with rocks from the latter supports an allochthonous western Tasmania model and amalgamation with Australia in late Cambrian time.

Chemostratigraphy of Medium-grade Marbles of the Late Neoproterozoic Seridó Group, Seridó Fold Belt, Northeastern Brazil

2004 ◽  
Vol 7 (3) ◽  
pp. 731-744 ◽  
Author(s):  
Rielva S.C. Nascimento ◽  
Alcides N. Sial ◽  
Márcio M. Pimentel
Keyword(s):  
Northeastern Brazil ◽  
Fold Belt ◽  
Late Neoproterozoic

scholarly journals The Tectonic interaction between the Paramirim Aulacogen and the Araçuaí Belt, São Francisco craton region, Eastern Brazil

2006 ◽  
Vol 78 (1) ◽  
pp. 151-173 ◽  
Author(s):  
Simone C.P. Cruz ◽  
Fernando F. Alkmim
Keyword(s):  
Structural Analysis ◽  
Early Stage ◽  
Local Limit ◽  
Rift System ◽  
Main Stage ◽  
Eastern Brazil ◽  
Thrust System ◽  
Late Neoproterozoic ◽  
Tectonic Features ◽  
Araçuaí Orogen

The Paramirim aulacogen, hosted in the northern part of the São Francisco craton, corresponds to two superimposed and partially inverted rifts of Paleo and Neoproterozoic ages. The Rio Pardo salient of the Araçuaí belt defines the local limit of the craton and interferes with the aulacogen structures. In order to understand the mechanism and timing of the tectonic interaction between these tectonic features during the inversion processes, a structural analysis was undertaken in the southern Paramirim aulacogen and along the Rio Pardo salient. The results obtained indicate that the Rio Pardo salient formed during an early stage of closure of the Neoproterozoic Macaúbas rift system and consequent initiation of the Araçuaí orogen. The orogenic front propagated further northwards into the craton, causing a first stage of inversion in the southern terminus of the aulacogen trough. Subsequently, the Paramirim aulacogen experienced the main stage of inversion, which led to the development of a NNW-oriented basement involved fold-thrust system. These fabric elements overprint the Rio Pardo salient, and the structures of both the first and second stages of inversion affect the Salitre Formation, the youngestNeoproterozoic unit of the area, clearly indicating a Late Neoproterozoic maximum age for all the inversion stages of the Paramirim aulacogen.

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