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  • 1
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    Cratonic Basin Formation : A Case Study of the Parnaíba Basin of Brazil (2018)
    London : The Geological Society
    Details
    Keywords: basin research ; cratonic basin ; Parnaíba Basin ; Brazil
    Description / Table of Contents: Cratonic basin formation: a case study of the Parnaíba Basin of Brazil / M. C. Daly, R. A. Fuck, J. Julià, D. I. M. Macdonald and A. B. Watts / Geological Society, London, Special Publications, 472, 1-15, 14 September 2018, https://doi.org/10.1144/SP472.20 --- Cratonic basins --- Cratonic basins with reference to the Michigan basin / Norman H. Sleep / Geological Society, London, Special Publications, 472, 17-35, 6 February 2018, https://doi.org/10.1144/SP472.1 --- Lithospheric heating by crustal thickening: a possible origin of the Parnaíba Basin / D. McKenzie and V. Rodríguez Tribaldos / Geological Society, London, Special Publications, 472, 37-44, 19 February 2018, https://doi.org/10.1144/SP472.5 --- A comparative study of the Parnaíba, Michigan and Congo cratonic basins / A. B. Watts, B. Tozer, M. C. Daly and J. Smith / Geological Society, London, Special Publications, 472, 45-66, 22 February 2018, https://doi.org/10.1144/SP472.6 --- The Parnaíba cratonic basin: lithospheric and crustal structure --- Structure of the crust and upper mantle beneath the Parnaíba Basin, Brazil, from wide-angle reflection–refraction data / José E. P. Soares, Randell Stephenson, Reinhardt A. Fuck, Marcus V. A. G. de Lima, Vitto C. M. de Araújo, Flávio T. Lima, Fábio A. S. Rocha and Cíntia R. da Trindade / Geological Society, London, Special Publications, 472, 67-82, 13 April 2018, https://doi.org/10.1144/SP472.9 --- Deep crustal architecture of the Parnaíba basin of NE Brazil from receiver function analysis: implications for basin subsidence / Diogo L. O. Coelho, Jordi Julià, Verónica Rodríguez-Tribaldos and Nicholas White / Geological Society, London, Special Publications, 472, 83-100, 16 May 2018, https://doi.org/10.1144/SP472.8 --- Reprocessing and interpretation of deep structures in a regional transect of the Parnaíba Basin, Brazil / Rafael R. Manenti, Wilker E. Souza and Milton J. Porsani / Geological Society, London, Special Publications, 472, 101-107, 12 June 2018, https://doi.org/10.1144/SP472.17 --- Electrical conductivity structure across the Parnaíba Basin, NE Brazil / F. F. Solon, S. L. Fontes and E. F. La Terra / Geological Society, London, Special Publications, 472, 109-126, 13 July 2018, https://doi.org/10.1144/SP472.19 --- The pre-Silurian Riachão basin: a new perspective on the basement of the Parnaíba basin, NE Brazil / Amanda Porto, Michael C. Daly, Emanuele La Terra and Sergio Fontes / Geological Society, London, Special Publications, 472, 127-145, 19 February 2018, https://doi.org/10.1144/SP472.2 --- Implications of preliminary subsidence analyses for the Parnaíba cratonic basin / Verónica Rodríguez Tribaldos and Nicky White / Geological Society, London, Special Publications, 472, 147-156, 6 February 2018, https://doi.org/10.1144/SP472.3 --- The Parnaíba cratonic basin: stratigraphic and sedimentological evolution --- Evolution of a cratonic basin: insights from the stratal architecture and provenance history of the Parnaíba Basin / L. A. Menzies, A. Carter and David I. M. MacDonald / Geological Society, London, Special Publications, 472, 157-179, 6 August 2018, https://doi.org/10.1144/SP472.18 --- Provenance of sandstones in the Parnaíba Basin through detrital zircon geochronology / M. H. B. M. Hollanda, A. M. Góes and F. A. Negri / Geological Society, London, Special Publications, 472, 181-197, 12 July 2018, https://doi.org/10.1144/SP472.16 --- Palaeogeographical and palaeoclimatic evolution of the intracratonic Parnaíba Basin, NE Brazil using GPlates plate tectonic reconstructions and chemostratigraphic tools / Marwan M. Jaju, Haydon P. Mort, Fadi H. Nader, Mário L. Filho and David I. M. Macdonald / Geological Society, London, Special Publications, 472, 199-222, 6 June 2018, https://doi.org/10.1144/SP472.12 --- Re-evaluation of the Permian macrofossils from the Parnaíba Basin: biostratigraphic, palaeoenvironmental and palaeogeographical implications / Roberto Iannuzzi, Rodrigo Neregato, Juan C. Cisneros, Kenneth D. Angielczyk, Ronny Rößler, Rosemarie Rohn, Claudia Marsicano, Jörg Fröbisch, Thomas Fairchild, Roger M. H. Smith, Francine Kurzawe, Martha Richter, Max C. Langer, Tatiane M. V. Tavares, Christian F. Kammerer, Domingas M. Conceição, Jason D. Pardo and Guilherme A. Roesler / Geological Society, London, Special Publications, 472, 223-249, 2 July 2018, https://doi.org/10.1144/SP472.14 --- The Parnaíba cratonic basin: magmatic history --- Geochemical and temporal provinciality of the magmatism of the eastern Parnaíba Basin, NE Brazil / Monica Heilbron, Eliane Guedes, Miguel Mane, Claudio de Morisson Valeriano, Miguel Tupinambá, Júlio Almeida, Luiz Guilherme do Eirado Silva, Beatriz Paschoal Duarte, Jorge Carlos Dela Favera and Adriano Viana / Geological Society, London, Special Publications, 472, 251-278, 5 June 2018, https://doi.org/10.1144/SP472.11 --- Petrology of Jurassic and Cretaceous basaltic formations from the Parnaíba Basin, NE Brazil: correlations and associations with large igneous provinces / Alisson L. Oliveira, Márcio M. Pimentel, Reinhardt A. Fuck and Diógenes C. Oliveira / Geological Society, London, Special Publications, 472, 279-308, 6 August 2018, https://doi.org/10.1144/SP472.21 --- Role of basaltic magmatism within the Parnaíba cratonic basin, NE Brazil / Marthe Klöcking, Nicky White and John MacLennan / Geological Society, London, Special Publications, 472, 309-319, 23 March 2018, https://doi.org/10.1144/SP472.4 --- Phanerozoic magmatism in the Parnaíba Basin: characterization of igneous bodies (well logs and 2D seismic sections), geometry, distribution and sill emplacement patterns / I. Trosdtorf, J. M. Morais Neto, S. F. Santos, C. V. Portela Filho, T. A. Dall Oglio, A. C. M. Galves and A. M. Silva / Geological Society, London, Special Publications, 472, 321-340, 16 May 2018, https://doi.org/10.1144/SP472.10 --- The Parnaíba cratonic basin: resource system --- Atypical igneous-sedimentary petroleum systems of the Parnaíba Basin, Brazil: seismic, well logs and cores / Frederico S. de Miranda, Ana Luiza Vettorazzi, Paulo R. da Cruz Cunha, Fernando B. Aragão, Diogo Michelon, João Luiz Caldeira, Ernani Porsche, Celso Martins, Roberto B. Ribeiro, Alexandre F. Vilela, José R. Corrêa, Lilian S. Silveira and Kátia Andreola / Geological Society, London, Special Publications, 472, 341-360, 12 July 2018, https://doi.org/10.1144/SP472.15 --- New insights into the Parnaíba Basin: results of investments by the Brazilian National Petroleum Agency / Marina Abelha, Eliane Petersohn, Gabriel Bastos and Daniel Araújo / Geological Society, London, Special Publications, 472, 361-366, 5 July 2018, https://doi.org/10.1144/SP472.13
    Pages: Online-Ressource (VIII, 372 Seiten) , Illustrationen, Diagramme
    ISBN: 9781786203960
    URL: https://sp.lyellcollection.org/content/472/1
    Language: English
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  • 2
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    Crustal thickness variations in northern Morocco (2012)
    Wiley
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    Publication Date: 2012-02-23
    Description: During the TopoIberia experiment, a total of 26 seismic broadband stations were recording in northern Morocco, providing for the first time extended regional coverage for investigating structure and seismotectonics of the southern branch of the Betic-Rif arc, its foreland, and the Atlas domain. Here, we analyze P-to-S converted waves in teleseismic receiver functions to infer gross crustal properties as thickness and Vp/Vs ratio. Strong lateral variations of the crustal thickness are observed throughout the region. Crustal thicknesses vary between 22 and 44 km and display a simple geographic pattern that divides the study area into three domains: entire northwestern Morocco underlain by a thickened crust with crustal thicknesses between 35 and 44 km; northeastern Morocco affected by significant crustal thinning, with crustal thicknesses ranging from 22 to 30 km, with the shallowest Moho along the Mediterranean coast; and an extended domain of 27–34 km thick crust, farther south which includes the Atlas domain and its foreland regions. Vp/Vs ratios show normal values of ∼1.75 for most stations except for the Atlas domain, where several stations give low Vp/Vs ratios of around 1.71. The very sharp transition from thick crust in northwestern Morocco to thin crust in northeastern Morocco is attributed to regional geodynamics, possibly the realm of present-day subcrustal dynamics in the final stage of western Mediterranean subduction. Crustal thicknesses just slightly above 30 km in the southern domain are intriguing, showing that high topography in this region is not isostatically compensated at crustal level.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 3
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    Evaluation of deep sediment velocity structure in the New Madrid seismic zone (2004)
    In:  Bulletin of the Seismological Society of America, (submitted), Icelandic Meteorological Office, Ministry for the Environment University of Iceland, vol. 94, no. 1, pp. 334-340, pp. TC1011, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 2004
    Keywords: Velocity depth profile ; Site amplification ; Earthquake hazard ; Earthquake risk ; Seismology ; BSSA ; Julia
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    An updated crustal thickness map of central South America based on receiver function measurements in the region of the Chaco, Pantanal and Paraná Basins, southwestern Brazil (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Abstract Previous compilation of crustal structure in South America had large unsampled areas including the thin crust in the Sub‐Andean lowlands, largely estimated by gravity data, and the sparsely sampled Amazon Craton. A deployment of 35 seismic stations in Brazil, Bolivia, Paraguay, Argentina and Uruguay improved the coverage of the Pantanal Basin in Western Brazil, the intracratonic Paraná and the Chaco basins. Crustal thicknesses and Vp/Vs ratios were estimated with a modified H‐k method by producing three stacked traces to enhance the three Moho conversions (the direct Ps and the two multiples Ppps and Ppss). This modified method gives lower uncertainties than previous studies and shows more regional consistency between nearby stations. The temporary stations and the Brazilian network (RSBR) have characterized the crustal structure as follows. The Paraná Basin has a thick crust 40‐45 km, and average Vp/Vs ratio (1.71‐1.77), while the Chaco Basin has a slightly thinner crust (35‐40 km) and higher Vp/Vs ratio (1.75‐1.79). This confirms the lack of widespread magmatic underplating in the Paraná Basin that could be related to the origin of the flood basalts during the South Atlantic opening. A belt of thin crust (30‐35 km) with low Vp/Vs (〈1.74) is confined to the eastern edge of the Pantanal Basin. Normal crust (38‐43 km) is observed along the western edge of the Pantanal, from the southern part of the Amazon craton to the Rio Apa cratonic block. This study, combined with other published data, provides an updated crustal thickness map of South America.
    Print ISSN: 2169-9313
    Electronic ISSN: 2169-9356
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 5
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    Crustal structure of the eastern Borborema Province, NE Brazil, from the joint inversion of receiver functions and surface-wave dispersion: Implications for plateau uplift (2015)
    Wiley
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    Publication Date: 2015-04-24
    Description: We investigate the crustal structure of the Borborema Province of NE Brazil by developing 44 S-wave velocity-depth profiles from the joint inversion of receiver functions and fundamental-mode, Rayleigh-wave group velocities. The Borborema Province is located in the northeasternmost corner of the South American continent, and represents a portion of a larger Neoproterozoic mobile belt that formed during the Brasiliano-Pan African orogeny. Extensional processes in the Mesozoic - eventually leading to the separation of Africa and South America - left a number of aborted rift basins in the continental interiors, and episodes of diffuse intraplate volcanism and uplift marked the evolution of the Province after continental breakup. Our velocity-depth profiles reveal the existence of two crustal types in the Province: (i) the thin crustal type, which consists of 30-32.5 km thick crust, with an upper layer of 3.4-3.6 km/s overlying a lower layer of 3.7-3.8 km/s; and (ii) the thick crustal type, which consists of a 35-37.5 km thick crust, with velocities between 3.5 and 3.9 km/s down to ~30 km depth and a gradational increase in velocity ( V S  ≥ 4.0 km/s) down to upper mantle depths. The crustal types correlate well with topography, with the thick crustal type being mainly found in the high-standing southern Borborema Plateau, and the thin crustal type being mostly found in the low-lying Sertaneja depression and coastal cuestas. Interestingly, the thin crustal type is also observed under the elevated topography of the northern Plateau. We argue that the thick crustal type is rheologically strong and not necessarily related to post-breakup mantle processes, as it is commonly believed. We propose that extensional processes in the Mesozoic stretched portions of the Brasiliano crust and formed the thin crustal type that is now observed in the regions of low-lying topography, leaving the rheologically strong thick crust of the southern Plateau at higher elevations. The crust making the northern Plateau would have thinned and subsided during Mesozoic extension as part of a greater Sertaneja depression, to then experience uplift in the Cenozoic and achieve its present elevation.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 6
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    Crustal Vp–Vs ratios and thickness for Ross Island and the Transantarctic Mountain front, Antarctica (2011)
    Oxford University Press
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    Publication Date: 2011-02-08
    Description: SUMMARY We investigate crustal V p –V s ratios and thickness along the Transantarctic Mountain (TAM) front and on Ross Island, Antarctica to determine if the TAM crust has been modified by the Neogene magmatism associated with Ross Island. A seismic low velocity zone (LVZ) in the upper mantle beneath Ross Island extends laterally ∼80 km under the TAM front, and mantle temperatures within the LVZ may be sufficiently elevated for partial melting to have occurred and modified the crust. Data for the study come from 16 temporary seismic stations that were part of the TAM Seismic Experiment and three permanent stations. Estimates of V p / V s (κ) and crustal thickness ( H ) have been obtained from receiver functions analysed using the H –κ stacking method for 10 of the stations, and for the remaining stations, crustal thickness has been calculated by using the Moho P s arrival time with an assumed V p / V s value. A V p / V s value of 1.88 is obtained for Ross Island, consistent with the mafic composition of the volcanic rocks from Mt. Erebus. V p / V s values for stations in the TAM situated away from the LVZ range from 1.63 to 1.78, with a mean of 1.73, while values for stations in the TAM lying above the LVZ range from 1.67 to 1.78, with a mean of 1.72. This result indicates that there is little difference in bulk crustal composition for areas above and away from the LVZ, and together with a V p / V s value (1.73) that is typical for felsic to intermediate composition crust, suggests that the crust along the TAM front has not been altered significantly by mafic magmatism. Crustal thickness estimates along the coast are quite variable, ranging from 18 to 33 km, and increase to 39 km inland beneath the crest of the TAM. On Ross Island, crustal thickness estimates range between 19 and 27 km.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 7
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    Shear Velocity Structure Beneath Saudi Arabia From the Joint Inversion of P and S Wave Receiver Functions, and Rayleigh Wave Group Velocity Dispersion Data (2019)
    Wiley
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    Publication Date: 2019
    Description: Abstract We develop a new 3‐D shear velocity model for the lithosphere and sublithospheric mantle under Saudi Arabia by jointly inverting P wave receiver functions, S wave receiver functions, and fundamental‐mode Rayleigh wave group velocities. P and S receiver functions are calculated from earthquakes recorded between 2012 and 2015 at 156 Saudi National Seismic Network stations operated by the Saudi Geological Survey. Rayleigh wave dispersion data are extracted from independent tomographic studies. Our model reveals significant lateral variations in crustal and upper‐mantle S velocity below Saudi Arabia. Particularly, a low‐velocity zone, with minimum S velocity of ~4.0 km/s in the depth range of 70‐190 km, is observed under the Arabian Shield coinciding with Cenozoic surface volcanism. The low‐velocity zone is found consistent with the presence of partial melts in the mantle and interpreted as a potential deep magma source for the volcanism in western Arabia. We propose that magmas responsible for the Arabian volcanism may be derived from multiple sources. Both lithospheric thinning and the Afar plume trigger magma production beneath southwestern Arabia, while decompression melting caused by the lithospheric thinning may be the main factor in the central and northern portions. Furthermore, we find evidence for localized crustal low shear velocity anomalies (2–4% reductions) that appear spatially correlated to the volcanism; these may be due to fractures caused by magma ascent and small amounts of partial melt in the crust. This spatial distribution of S velocity reductions may indicate the plumbing system for magma ascent underneath western Arabia.
    Print ISSN: 2169-9313
    Electronic ISSN: 2169-9356
    Topics: Geosciences , Physics
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  • 8
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    Upper and Middle Crustal Velocity Structure of the Colombian Andes From Ambient Noise Tomography: Investigating Subduction-Related Magmatism in the Overriding Plate (2018)
    American Geophysical Union
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    Publication Date: 2018-02-01
    Description: New maps of S velocity variation for the upper and middle crust making up the northwestern most corner of South America have been developed from cross correlation of ambient seismic noise at 52 broadband stations in the region. Over 1,300 empirical Green's functions, reconstructing the Rayleigh wave portion of the seismic wavefield, were obtained after time and frequency-domain normalization of the ambient noise recordings and stacking of 48 months of normalized data. Interstation phase and group velocity curves were then measured in the 6–38 s period range and tomographically inverted to produce maps of phase and group velocity variation in a 0.5° × 0.5° grid. Velocity-depth profiles were developed for each node after simultaneously inverting phase and group velocity curves and combined to produce 3-D maps of S velocity variation for the region. The S velocity models reveal a ~7 km thick sedimentary cover in the Caribbean region, the Magdalena Valley, and the Cordillera Oriental, as well as crustal thicknesses in the Pacific and Caribbean region under ~35 km, consistent with previous studies. They also display zones of slow velocity at 25–35 km depth under regions of both active and inactive volcanism, suggesting the presence of melts that carry the signature of segmented subduction into the overriding plate. A low-velocity zone in the same depth range is imaged under the Lower Magdalena Basin in the Caribbean region, which may represent either sublithospheric melts ponding at midcrustal levels after breaching through a fractured Caribbean flat slab or fluid migration through major faults within the Caribbean crust. ©2018. American Geophysical Union. All Rights Reserved.
    Print ISSN: 2169-9313
    Electronic ISSN: 2169-9356
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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  • 9
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    Deviatoric Moment Tensor Solutions from Spectral Amplitudes in Surface Network Recordings: Case Study in São Caetano, Pernambuco, Brazil (2017)
    Seismological Society of America
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    Publication Date: 2017-03-14
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
    Published by Seismological Society of America
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  • 10
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    The structure of the crust and uppermost mantle beneath Madagascar (2017)
    Oxford University Press
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    Publication Date: 2017-01-01
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Royal Astronomical Society.
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