DOCSLIB.ORG

Geoelectric Crustal Structures Off the SW Border of the S˜Ao Francisco

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Geoelectric Crustal Structures Off the SW Border of the S˜Ao Francisco Geophys. J. Int. (2005) 162, 357–370 doi: 10.1111/j.1365-246X.2005.02643.x Geoelectric crustal structures off the SW border of the Sao˜ Francisco craton, central Brazil, as inferred from a magnetotelluric survey Maur´ıcio S. Bologna, Antonio L. Padilha and Icaro´ Vitorello Instituto Nacional de Pesquisas Espaciais - INPE, C.P. 515, 12201-970 S˜ao Jos´e dos Campos, Brazil. E-mails: [email protected] (MSB); [email protected] (ALP); [email protected] (IV) Accepted 2005 March 17. Received 2005 January 21; in original form 2004 June 4 SUMMARY A magnetotelluric (MT) survey of the crust beneath sedimentary basins and thrust sheets along the southwestern edge of the S˜ao Francisco craton, central Brazil, reveals intricate electrical characteristics that are interpreted in the context of Proterozoic collision tectonics and hori- zontal transport of allochthonous rock units, emplacement of Cretaceous hypabyssals, lavas and diatremes of ultrapotassic–mafic composition, and occurrence of induced seismicity. The data exhibit strong distortions represented by 3-D induction effects and galvanic disturbances resulting from shallow structures, frequency and site dependence of electrical strike, and in- homogeneous anisotropic layers with smoothly varying phase split, conductance and azimuth of the highly conductive direction. Geoelectrical and orthogonal phase difference directions, GJI Geomagnetism, rock magnetism and palaeomagnetism 2-D inversion, and forward modelling characterize three distinct subhorizontal sections show- ing two anisotropic conductors within a highly resistive crust, laterally segmented into unique blocks. The model for the uppermost crust section has E–W geoelectric directions and a 15–30 S anisotropic zone at a depth of approximately 1–2 km along the entire profile. This conducting layer is interpreted to represent a brine-filled fracture layer possibly controlled by the present-day state of crustal stresses, as disclosed from reservoir-triggered quakes. The mid-crust section presents a deeper conducting zone located at depths below 10 km. It is de- fined by stronger MT responses having phase split directions oscillating from WNW–ESE to E–W beneath sites in the central-western area (Paran´a basin and allochthonous cover units) and NNE–SSW in the northeastern region (autochthonous platform units and Sanfranciscana basin). Anisotropy is greater than an order of magnitude in the highly conductive direction, with conductance in the range of 250–400 S. Conjecturally, the source of this anomalous fea- ture would come from interconnected grain-boundary phases and hypersaline fluids, exsolved and precipitated from upwelling Cretaceous magma. In the central-western area, favourable trapping of conductors was constrained along a nearly E–W direction, feasibly associated with relic structures inherited from Brasiliano/Pan African continental collisions. Along the northeast, however, the coincidence with superficial NNE–SSW structural directions suggests a localized direct causal relationship with the trend of extension related to magma emplace- ment. The lower crust has a highly resistive quasi–1-D section along the entire profile that prevails also at uppermost mantle depths. Thus, whereas the brittle crust would have recon- ciled subhorizontal strain with fluid percolation related to uplift and magma emplacement, a mechanically coupled and stronger lower crust/upper mantle would have controlled the deep magma generation during Cretaceous distention pulses. Key words: Alto Parana´ıba igneous province, central Brazil, crustal structure, electrical anisotropy, magnetotellurics, S˜ao Francisco craton. general, MT models require bulk rock masses with a much lower 1INTRODUCTION conductivity than expected from the solid-state conduction of the Interpretations of magnetotelluric (MT) data for studies of geody- most common silicates and carbonates. In the crust, except for the namic processes are often hindered by the poor understanding about particular cases of exotic carbon- and sulfide-rich lithologies, the ob- the origin and agents of conductivity in deep-Earth conditions. In servation of enhanced conductivity at depth is frequently attributed C 2005 RAS 357 358 M. S. Bologna, A. L. Padilha and I.´ Vitorello still controversial delimitation of the hidden western border of the S˜ao Francisco Plate, the extent of lithosphere remobilization by the Amazonas Craton -12˚ Brasiliano orogenies, the nature and physical state of the rocks un- Sa˜o Francisco derlying the thrust sheets and cratonic cover units, and the search Craton 1 for either a deep lithospheric root that could explain the occurrence of Cretaceous kimberlites and lamproites, or traces of a root-erasing DF process linked to the upwelling mantle material accountable for the -16˚ 2 multicompositional Cretaceous volcanic complexes. Suitable deep geophysical information, which could contribute to the solution of 3 such problems, is scarce and only regional potential-field and local- BH ized seismographic analyses are presently available (Bosum 1973; -80˚ -40˚ -20˚ S´a et al. 1993; James & Assump¸c˜ao 1996; Assump¸c˜ao et al. 2001). Parana´ Basin A long-term MT programme is under way in the region to sup- 0˚ plement the above techniques with a large-scale reconnaissance of 4 BRAZIL SP major conducting geostructures that could have persisted as records -24˚ of past episodes. 5 cean We discuss here geoelectrical signatures of the crust observed along an MT profile aligned in a NE–SW direction, from the south- tlantic O A -40˚ ern margin of the Phanerozoic Sanfranciscana basin over the S˜ao -28˚ Francisco craton, across the Neoproterozoic Bras´ılia fold belt and into the northeastern margin of the Paran´a basin, which probably rests on a different cratonic basement (site 3 of Fig. 1, blown up in -60˚ -56˚ -52˚ -48˚ -44˚ -40˚ Fig. 2). At most of the MT soundings, the data period ranges from Figure 1. Schematic outline of the major geological provinces of central- 0.0008 to 13 653 s, which allows the vertical imaging of geoelectric southern Brazil and main alkaline-carbonatite occurrences (modified from structures from the near surface (tens of metres) to great depths into Ulbrich & Gomes 1981): 1, Paranatinga/Poxor´eo; 2, Ipor´a; 3, Alto Parana´ıba the upper mantle (more than 150 km). The model to be presented is igneous province (APIP); 4, Serra do Mar; 5, Ponta Grossa. Locations of however restricted to discussion of the data in the interval limited some major cities are indicated as: DF, Bras´ılia; BH, Belo Horizonte; SP, by periods shorter than 53 s. This interval has an inductive scale S˜ao Paulo. The square box enclosing site 3 refers to the study area. of the same order of the regional crustal thickness, estimated from seismic data to be approximately 40 km (Berrocal et al. 2004). to proportionally minute amounts of high conductors in intercon- nected grain-boundary arrangements (Wannamaker 2000). Given 2GEOLOGICAL CONTEXT the appropriate environmental constraints (temperature, pressure, permeability, geochemistry), the commonly mentioned conductors The South American platform is composed of a Precambrian central are saline fluid, graphite, metallic and partial melt material (Jones core bordered by active orogens to the west and northwest, and of 1992). At higher mantle temperatures, solid-state conductivity of a Mesozoic–Cenozoic passive continental margin to the northeast olivine enhanced by hydrogen diffusion is another likely candidate and east. The core is formed by several Archean to Mesoprotero- (Karato 1990). zoic blocks amalgamated during the Neoproterozoic Brasiliano/Pan To make the interpretative link from the present-day measured African orogeny in the final assembly of Gondwana (Almeida et al. conductivity to past geological environments, it becomes necessary 1981). In central Brazil, the S˜ao Francisco craton, which was contin- to elucidate the origin of the conductor and of a required intercon- uous with the African Congo craton prior to the opening of the South nectivity, and how both were preserved or modified by processes Atlantic, presently encompasses a substantial part of the southeast- operating throughout the intervening geological time. This is bet- ern Brazilian highlands. Brasiliano fold-and-thrust belts fringe all ter accomplished by confronting the electromagnetic induction data sides of the craton with strong vergence towards its interior (Campos with available geological and geophysical data from the study area Neto 2000). in order to diminish the inherent ambiguity arising from the many Flanking the western margin of the S˜ao Francisco craton, the plausible causes of conductivity. Bras´ılia belt represents the external portion of a large Neoprotero- In central Brazil (Fig. 1), a complex history of multifaceted ge- zoic orogen in central Brazil (the Tocantins province; Fig. 1), which ological events, marked by Proterozoic continental collisions and developed in response to the convergence between the Amazon Cretaceous mantle magmatism, characterizes the southwestern mar- and the S˜ao Francisco–Congo cratons and another continental block gin of the Archean–Proterozoic S˜ao Francisco craton. The deep crust presently covered by the Phanerozoic sedimentary and volcanic is hidden by thrust sheets, cratonic cover units and basin rocks, mak- rocks of the Paran´a basin (Pimentel et al. 2000). Proterozoic meta- ing it an ideal region to test the MT potential to unravel underlying morphic rock units of varied nature and age constitute most of structural and tectonic
Load more

Recommended publications
  • Revista Brasileira De Geomorfologia MACHINE LEARNING ALGORITHM
    Revista Brasileira de Geomorfologia v. 21, nº 2 (2020) www.ugb.org.br http://dx.doi.org/10.20502/rbg.v21i2.1671 ISSN 2236-5664 MACHINE LEARNING ALGORITHM IN THE PREDICTION OF GEOMORPHIC INDICES FOR APPRAISAL THE INFLUENCE OF LANDSCAPE STRUCTURE ON FLUVIAL SYSTEMS, SOUTHEASTERN - BRAZIL ALGORITMO DE APRENDIZADO DE MÁQUINA NA PREDIÇÃO DE ÍNDICES GEOMÓRFICOS PARA AVALIAÇÃO DA INFLUÊNCIA DA ESTRUTURA DA PAISAGEM EM SISTEMAS FLUVIAIS, SUDESTE – BRASIL Cristiano Marcelo Pereira de Souza Programa de Pós-Graduação em Geografi a, Universidade Estadual de Montes Claros Av. Dr. Ruy Braga, S/N, Montes Claros, Minas Gerais. CEP: 39401-089. Brasil ORCID: 0000-0001-7692-1613 E-mail: [email protected] Natália Aragão de Figueredo Colégio Militar de Juiz de Fora Av. Presidente Juscelino Kubitschek, 5200, Juiz de Fora, Minas Gerais. CEP: 36087-000. Brasil ORCID: 0000-0003-3398-7107 E-mail: [email protected] Liovando Marciano da Costa Programa de Pós-Graduação em Solos Nutrição de Plantas, Universidade Federal de Viçosa Av. Peter Henry Rolfs, s/n, Viçosa, Minas Gerais. CEP: 36570-900. Brasil ORCID: 0000-0001-9581-0783 E-mail: [email protected] Gustavo Vieira Veloso Programa de Pós-Graduação em Solos Nutrição de Plantas, Universidade Federal de Viçosa Av. Peter Henry Rolfs, s/n, Viçosa, Minas Gerais. CEP: 36570-900. Brasil ORCID: 0000-0002-9451-2714 E-mail: [email protected] Maria Ivete Soares de Almeida Programa de Pós-Graduação em Geografi a, Universidade Estadual de Montes Claros Av. Dr. Ruy Braga, S/N, Montes Claros, Minas Gerais. CEP: 39401-089. Brasil ORCID: 0000-0002-3257-7109 E-mail: [email protected] Expedito José Ferreira Programa de Pós-Graduação em Geografi a, Universidade Estadual de Montes Claros Av.
    [Show full text]
  • The Morphology and Systematics of the Clam Shrimp Platyestheria Gen
    Cretaceous Research 91 (2018) 274e286 Contents lists available at ScienceDirect Cretaceous Research journal homepage: www.elsevier.com/locate/CretRes The morphology and systematics of the clam shrimp Platyestheria gen. nov. abaetensis (Cardoso) (Crustacea, Spinicaudata) from the Lower Cretaceous of the Sanfranciscana Basin, southeast Brazil * Jonathas S. Bittencourt a, , Rosemarie Rohn b, Oscar F. Gallego c, Mateo D. Monferran c, Alexandre Uhlein a a Laboratorio de Paleontologia e Macroevoluçao,~ Centro de Pesquisas Professor Manoel Teixeira da Costa, Departamento de Geologia, Instituto de Geoci^encias, Universidade Federal de Minas Gerais, Av. Presidente Antonio^ Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil b Sao~ Paulo State University (UNESP), Institute of Geosciences and Exact Sciences, Department of Applied Geology, Rio Claro Campus, Av. 24A, 1515, 13506- 900, Rio Claro, SP, Brazil c Centro de Ecología Aplicada del Litoral, CONICET-UNNE and Geología Historica-Micropaleontología (Area Ciencias de la Tierra - Departamento de Biología), FaCENA-UNNE, Casilla de Correo 128, 3400 Corrientes, Argentina article info abstract Article history: New specimens of the clam shrimp ‘Pseudestheria’ abaetensis Cardoso, 1971 (Spinicaudata) are described. Received 6 February 2018 The material was collected from the Quirico Formation (Lower Cretaceous of the Sanfranciscana Basin), at Received in revised form the same locality as the type series of the species. The carapaces are very large, oval and elongated, with 4 May 2018 anteriorly located and slightly projected umbo, straight dorsal margin, with flattened growth bands and Accepted in revised form 22 June 2018 15e20 serrated growth lines. Details of the microscopic structure of the carapace were analysed under Available online 26 June 2018 scanning electron microscope for the first time, disclosing a unique reticular pattern of ornamentation.
    [Show full text]
  • See in English
    SIGEP Geological and Paleontological Sites of Brazil SIGEP 013 Ichnofossils of the Porto Primavera Power Plant, State of São Paulo Dinosaur and mammal footprints in rocks from the Caiuá neocretaceous desert Luiz Alberto Fernandes 1 Fernando Antonio Sedor 2 Rafael Costa da Silva 3 Luiz Roberto da Silva 4 Adalberto Aurélio Azevedo 5 Alessandra Gonçalves Siqueira 6 1 Universidade Federal do Paraná - Depto. de Geologia/Caixa Postal 19.001/CEP 81531-990, Curitiba, Paraná/e-mail: [email protected] 2 Universidade Federal do Paraná - Museu de Ciências Naturais/e-mail: [email protected] 3 Companhia de Pesquisa de Recursos Minerais/RJ-DEGEO/DIPALE/e-mail: [email protected] 4 Companhia Energética de São Paulo – CESP/e-mail: [email protected] 5 Instituto de Pesquisas Tecnológicas do Estado de São Paulo S/A – IPT/e-mail: [email protected] 6 Instituto de Pesquisas Tecnológicas do Estado de São Paulo S/A – IPT/e.mail: [email protected] © Fernandes,L.A.; Sedor,F.A.; Silva,R.C.; Silva,L.R.; Azevedo,A.A.; Siqueira,A.G. 2008. Ichnofossils of the Porto Primavera Power Plant, State of São Paulo - Dinosaur and mammal footprints in rocks from the Caiuá neocretaceous desert. In: Winge,M.; Schobbenhaus,C.; Souza,C.R.G.; Fernandes,A.C.S.; Berbert-Born,M.; Queiroz,E.T.; (Edit.) Sítios Geológicos e Paleontológicos do Brasil. Available on line since 26/09/2008 at the address: http://www.unb.br/ig/sigep/sitio013/sitio013english.pdf [actually http://www.sigep.cprm.gov.br/sitio013/sitio013english.pdf] (The above bibliographic reference of author copy
    [Show full text]
  • Stratigraphic Relations, Kimberlite Emplacement and Lithospheric Thermal Evolution, Quiricó Basin, Minas Gerais State, Brazil
    STRATIGRAPHIC RELATIONS, KIMBERLITE EMPLACEMENT AND LITHOSPHERIC THERMAL EVOLUTION, QUIRICÓ BASIN, MINAS GERAIS STATE, BRAZIL George Read1, Herman Grutter2, Stewart Winter3, Nigel Luckman1 and Frank Gaunt4 1 Canabrava Diamond Corp., Canada; 2 Mineral Services Canada Inc., Canada; 3 Winterbourne Explorations Inc., Canada; 4 Parimá Mineração S.A., Brazil the Abaeté, São Bento, Areado and Tiros rivers. There INTRODUCTION are strong suggestions that the alluvial diamonds, found in the drainage systems of the Quiricó Basin, are locally The Quiricó Basin occurs between the towns of Carmo derived from kimberlite source rocks, but such sources do Paranaíba in the west, Tiros in the east and extends have long eluded exploration geologists. Conceptual north of João Pinheiro in Minas Gerais State, Brazil. exploration models can be based in part on the age and This Cretaceous sedimentary basin was deposited at a stratigraphic relations of the diamondiferous Três crucial time in the thermal evolution of the Ranchos and Canastra kimberlites, which occur over southwestern part of the São Francisco Craton and the 100 kilometers to the west of Archean rocks that define development of the Alto Paranaíba Igneous Province the western margin of the São Francisco craton. This (APIP). During the Cretaceous, alkaline volcanoes that setting and the relatively close proximity, in space and form part of the APIP erupted through the recently time, of diamondiferous kimberlites and barren deposited sediments of the Quiricó Basin. Field kamafugites suggests a complex evolution of relations, petrography and geochronology show that the potentially non-Archean lithosphere below the Quiricó initial alkali volcanism was kimberlitic while the final Basin during the Late Cretaceous.
    [Show full text]
  • Lepisosteoid-Type Fish Scales in the Barremian-Aptian (Lower
    Cretaceous Research 70 (2017) 1e7 Contents lists available at ScienceDirect Cretaceous Research journal homepage: www.elsevier.com/locate/CretRes Lepisosteoid-type fish scales in the Barremian-Aptian (Lower Cretaceous) of the Sanfranciscana Basin, Southeastern Brazil * Jonathas S. Bittencourt a, , Valeria Gallo b, Guilherme A. Rodrigues a a Universidade Federal de Minas Gerais, Instituto de Geoci^encias, Departamento de Geologia, Av. Presidente Antonio^ Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil b Universidade do Estado do Rio de Janeiro, Instituto de Biologia, Departamento de Zoologia, Laboratorio de Sistematica e Biogeografia, Rua Sao~ Francisco Xavier, 524, Maracana,~ 20550-013, Rio de Janeiro, RJ, Brazil article info abstract Article history: Lepisosteoid-type scales are described in detail for the first time from the Barremian-Aptian (Lower Received 3 July 2016 Cretaceous) Quirico Formation of the Sanfranciscana Basin, Southeastern Brazil. The specimens studied Received in revised form herein have been recovered from a new outcrop in northern Minas Gerais state and comprise a few 20 September 2016 nearly complete posterior scales and hundreds of scale fragments extracted from the sedimentary ma- Accepted in revised form 26 September trix. The scales are rhombic and preserve both the ganoine and the basal plate. The ganoine layer is thin, 2016 Available online 28 September 2016 pierced by foramina and ornamented by microtubercles, showing the typical arrangement of super- imposed sheets. The basal plate is composed by lamellar and woven bone, with flattened and isodia- fi Keywords: metric osteocytes, canaliculi of Williamson, and Sharpey's bers. An EDS analysis suggests diagenetic Ganoid scale alteration of the basal plate but not the ganoine layer.
    [Show full text]
  • Trace Fossils from the Upper Cretaceous Capacete Formation, Sanfranciscana Basin, Central Brazil
    Annales Societatis Geologorum Poloniae (2020), vol. 90: 247 – 260 doi: https://doi.org/10.14241/asgp.2020.15 TRACE FOSSILS FROM THE UPPER CRETACEOUS CAPACETE FORMATION, SANFRANCISCANA BASIN, CENTRAL BRAZIL Daniel SEDORKO ¹ *, Luciano ALESSANDRETTI ¹, Lucas Veríssimo WARREN ², Mariano VERDE ³, Caio César RANGEL ¹, Kimberly Silva RAMOS 4 & Renata Guimarães NETTO 4 ¹ Institute of Geography, Federal University of Uberlândia, LMG-746 Km 1, CEP 38500-000, Campus Monte Carmelo, MG, Brazil; e-mails: [email protected], [email protected], [email protected] ² Department of Geology, Institute of Geosciences and Exact Sciences, São Paulo State University, Avenida 24-A, Bela Vista, 178, CEP 13506-900, Rio Claro, SP, Brazil; e-mail: [email protected] ³ Paleontology Department, Sciences Faculty, University of the Republic, Iguá 4225, 11400, Montevideo, Uruguay; e-mail: [email protected] 4 Geology Graduate Program, Unisinos University, São Leopoldo, RS, Brazil; e-mails: [email protected], [email protected] *Corresponding author Sedorko, D., Alessandretti, L., Warren, L. V., Verde, M., Rangel, C. C., Ramos, K. S. & Netto, R. G., 2020. Trace fossils from the Upper Cretaceous Capacete Formation, Sanfranciscana Basin, Central Brazil. Annales Societatis Geologorum Poloniae, 90: 247 – 260. Abstract: The Upper Cretaceous Capacete Formation, from the intracratonic Sanfranciscana Basin, central Brazil, consists of epiclastic sediments with a significant aeolian contribution. This unit has been traditionally interpreted as deposited by alluvial fans distally grading to braided rivers in an arid- to semiarid climate within the central part of southwestern Gondwana. Locally, some expositions with wide lateral extension show architectural ele- ments indicative of deposition in meandering rivers, such as floodplain fines (FF) interbedded with crevasse splay (CR), lateral-accretion macroforms (LA), and channels (CH).
    [Show full text]
  • Paleomagnetism of the Santa Fé Group, Central Brazil
    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114, B02101, doi:10.1029/2008JB005735, 2009 Click Here for Full Article Paleomagnetism of the Santa Fe´ Group, central Brazil: Implications for the late Paleozoic apparent polar wander path for South America Daniele Brandt,1 Marcia Ernesto,1 Antonio Carlos Rocha-Campos,2 and Paulo Roberto dos Santos2 Received 4 April 2008; revised 28 August 2008; accepted 27 October 2008; published 4 February 2009. [1] Paleomagnetic and rockmagnetic data are reported for the Floresta Formation (Santa Fe´ Group) of the Sanfranciscana Basin, central Brazil. This formation represents the Permo-Carboniferous glacial record of the basin and comprises the Brocoto´ (diamictites and flow diamictites), Brejo do Arroz (red sandstones and shales with dropstones and invertebrate trails), and Lavado (red sandstones) members, which crop out near the cities of Santa Fe´ de Minas and Canabrava, Minas Gerais State. Both Brejo do Arroz and Lavado members were sampled in the vicinities of the two localities. Alternating field and thermal demagnetizations of 268 samples from 76 sites revealed reversed components of magnetization in all samples in accordance with the Permo-Carboniferous Reversed Superchron. The magnetic carriers are magnetite and hematite with both minerals exhibiting the same magnetization component, suggesting a primary origin for the remanence. We use the high-quality paleomagnetic pole for the Santa Fe´ Group (330.9°E 65.7°S; N = 60; a95 =4.1°; k = 21) in a revised late Carboniferous to early Triassic apparent polar wander path for South America. On the basis of this result it is shown that an early Permian Pangea A-type fit is possible if better determined paleomagnetic poles become available.
    [Show full text]
  • The Cretaceous Sanfranciscan Basin, Eastern Plateau of Brazil
    Revista Brasileira de Geociências 30(3):450-452, setembro de 2000 THE CRETACEOUS SANFRANCISCAN BASIN, EASTERN PLATEAU OF BRAZIL GERALDO NORBERTO CHAVES SGARBI ABSTRACT The Cretaceous Sanfranciscan Basin, located in the eastern plateau of Brazil, is one of the most impressive continental basin of the country, because of its complex and exceptional association of sedimentary and volcanic rocks. The presence of macro and microfossils, large diamonds and a surprising occurrence of a radiolarian fauna present in chert layers intercalated in eolian sandstones form very interesting topics on the tectonic and paleogeography aspects of the Gondwana during the Cretaceous. The basin has a south-north elongated shape, from the west of Minas Gerais State (latitude 20° S) to the southern Tocantins, Maranhao and Piaui States (latitude 10° S). It is approximately 1100 km long and has a maximum width of about 270 Km (Fig 1). It occurs in a corridor between 44° and 47° of longitude W. It was filled with Areado and Mata da Corda Groups, and lies over, from south to north, low-grade metamorphic sediments of the Bambuí Group (Upper Proterozoic), Permo-Carbonifeous glaciogenic sediments of Santa Fé Group, Archean granitoids of the regional basement and sedimentary rocks of the Paleozoic Parnaíba Basin, in its outermost northern border. The early Cretaceous Areado Group has 200 m of maximum thickness. It lies over older rocks along a regional disconformity and comprises a basal conglomerate with transported ventifacts deposited in a desert environment, associated to fine-grained lacustrine sediments and eolian and fluviodeltaic sandstones of the Três Barras Formation. The late Cretaceous Mata da Corda Group has 230 m of maximum thickness.
    [Show full text]
  • Shark (Chondrichthyes) Microremains from the Lower Cretaceous Quiricó Formation, Sanfranciscana Basin, Southeast Brazil
    Historical Biology An International Journal of Paleobiology ISSN: 0891-2963 (Print) 1029-2381 (Online) Journal homepage: https://www.tandfonline.com/loi/ghbi20 Shark (Chondrichthyes) microremains from the Lower Cretaceous Quiricó Formation, Sanfranciscana Basin, Southeast Brazil Léo Galvão Carnier Fragoso, Jonathas S. Bittencourt, Ana Luisa D Mateus, Mario Alberto Cozzuol & Martha Richter To cite this article: Léo Galvão Carnier Fragoso, Jonathas S. Bittencourt, Ana Luisa D Mateus, Mario Alberto Cozzuol & Martha Richter (2019): Shark (Chondrichthyes) microremains from the Lower Cretaceous Quiricó Formation, Sanfranciscana Basin, Southeast Brazil, Historical Biology, DOI: 10.1080/08912963.2019.1692830 To link to this article: https://doi.org/10.1080/08912963.2019.1692830 Published online: 24 Nov 2019. Submit your article to this journal View related articles View Crossmark data Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=ghbi20 HISTORICAL BIOLOGY https://doi.org/10.1080/08912963.2019.1692830 ARTICLE Shark (Chondrichthyes) microremains from the Lower Cretaceous Quiricó Formation, Sanfranciscana Basin, Southeast Brazil Léo Galvão Carnier Fragoso a, Jonathas S. Bittencourt a, Ana Luisa D Mateusb, Mario Alberto Cozzuolb and Martha Richterc aLaboratory of Paleontology and Macroevolution, CPMTC, Departamento de Geologia, Instituto de Geociências, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; bDepartamento de Zoologia, Instituto de Ciências Biológicas,
    [Show full text]
  • Tapuiasaurus Macedoi Zaher Et Al
    Bruno Albert Navarro Osteologia pós-craniana e relações filogenéticas do titanossauro do Cretáceo Inferior Tapuiasaurus macedoi Zaher et al. 2011 Postcranial osteology and phylogenetic relationships of the Early Cretaceous titanosaur Tapuiasaurus macedoi Zaher et al. 2011 Volume 1 - Main text São Paulo 2019 Bruno Albert Navarro Osteologia pós-craniana e relações filogenéticas do titanossauro do Cretáceo Inferior Tapuiasaurus macedoi Zaher et al. 2011 Postcranial osteology and phylogenetic relationships of the Early Cretaceous titanosaur Tapuiasaurus macedoi Zaher et al. 2011 Dissertation presented to the Departamento de Zoologia do Instituto de Biociências da Universidade de São Paulo, as part of the requirements for obtaining the Master of Science Degree with emphasis in Zoology. Advisor: Prof. Dr. Hussam El Dine Zaher São Paulo 2019 1 Cataloging Sheet Navarro, Bruno A. Osteologia pós-craniana e relações filogenéticas do titanossauro do Cretáceo Inferior Tapuiasaurus macedoi Zaher et al. 2011 : Postcranial osteology and phylogenetic relationships of the Early Cretaceous titanosaur Tapuiasaurus macedoi Zaher et al. 2011 / Bruno Albert Navarro; orientador Hussam El Dine Zaher. - São Paulo, 2019. 263 f. + anexos Dissertação (Mestrado) - Instituto de Biociências da Universidade de São Paulo, Departamento de Zoologia. 1. Cretáceo Inferior 2. Titanosauria 3. Tapuiasaurus macedoi 4. Osteologia 5. Filogenia I. Zaher, Hussam El Dine, orient. II. Título. Judging Committee _______________________ _______________________ Prof. Dr. Prof. Dr. ______________________
    [Show full text]
  • Osteologia Pós-Craniana E Relações Filogenéticas Do Titanossauro Do Cretáceo Inferior Tapuiasaurus Macedoi Zaher Et Al
    Bruno Albert Navarro Osteologia pós-craniana e relações filogenéticas do titanossauro do Cretáceo Inferior Tapuiasaurus macedoi Zaher et al. 2011 Postcranial osteology and phylogenetic relationships of the Early Cretaceous titanosaur Tapuiasaurus macedoi Zaher et al. 2011 Volume 1 - Main text São Paulo 2019 Bruno Albert Navarro Osteologia pós-craniana e relações filogenéticas do titanossauro do Cretáceo Inferior Tapuiasaurus macedoi Zaher et al. 2011 Postcranial osteology and phylogenetic relationships of the Early Cretaceous titanosaur Tapuiasaurus macedoi Zaher et al. 2011 Dissertation presented to the Departamento de Zoologia do Instituto de Biociências da Universidade de São Paulo, as part of the requirements for obtaining the Master of Science Degree with emphasis in Zoology. Advisor: Prof. Dr. Hussam El Dine Zaher São Paulo 2019 1 Cataloging Sheet Navarro, Bruno A. Osteologia pós-craniana e relações filogenéticas do titanossauro do Cretáceo Inferior Tapuiasaurus macedoi Zaher et al. 2011 : Postcranial osteology and phylogenetic relationships of the Early Cretaceous titanosaur Tapuiasaurus macedoi Zaher et al. 2011 / Bruno Albert Navarro; orientador Hussam El Dine Zaher. - São Paulo, 2019. 263 f. + anexos Dissertação (Mestrado) - Instituto de Biociências da Universidade de São Paulo, Departamento de Zoologia. 1. Cretáceo Inferior 2. Titanosauria 3. Tapuiasaurus macedoi 4. Osteologia 5. Filogenia I. Zaher, Hussam El Dine, orient. II. Título. Judging Committee _______________________ _______________________ Prof. Dr. Prof. Dr. ______________________
    [Show full text]
  • Estratigrafia E Sedimentação Da Bacia Sanfranciscana: Uma Revisão
    Revista Brasileira de Geociências 27(3):269-282, setembro de 1997 ESTRATIGRAFIA E SEDIMENTAÇÃO DA BACIA SANFRANCISCANA: UMA REVISÃO JOSÉ ELOI GUIMARÃES CAMPOS & MARCEL AUGUSTE DARDENNE ABSTRACT STRATIGRAPHY AND SEDIMENTATION OF THE SANFRANCISCANA BASIN: A REVIEW This paper presents a stratigraphic and depositional systems review to the Phanerozoic cover of the São Francisco Craton, defined as the Sanfranciscana Basin. The Phanerozoic cover is composed mainly of sedimentary continental rocks and minor explosive volcanic rocks. The stratigraphy and sedimentology of the Phanerozoic successions are summarized as follows: Santa Fé Group (Carboniferous-Permian) -divided into Floresta and Tabuleiro formations. This glaciogenic sequence represents the gondwanan glaciation record in the Sanfranciscana Basin. These sediments are preserved in valleys excavated in the basement and crop out in most of the basin . Areado Group (Early Cretaceous) -constituted by the Abaeté, Quiricó and Três Barras formations, characterized by lateral and vertical interfingerings. The Abaeté Formation was deposited by braided stream and the in southern area by alluvial fans; the Quiricó Formation records a lacustrine sedimentation. and the Três Barras Formation, was deposited in the fluvial, fluviodeltaic and aeolian environments. The Areado Group is thick in southern portion of the basin (200 meters); it is less than 60 meters and discontinous in the central-northern areas. Mata da Corda Group (Late Cretaceous) -composed by the Patos and Capacete formations. The Patos Formation is composed by alkaline volcanic rocks. The Capacete Formation represents the distai epiclastic sediments with important aeolian sand contribution. It is present only in the southern sector of the basin. Urucuia Group (Late Cretaceous) - composed of sandstones, divided into Posse (with Facies l e 2) and Serra das Araras formations, respectively interpreted as dry field dune deposits, braided stream of channelized deposition and braided stream deposited by sheet flows.
    [Show full text]