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Journal articles on the topic 'Continental Rift of Southern Brazil'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Reuber, Kyle, and Paul Mann. "Control of Precambrian-to-Paleozoic orogenic trends on along-strike variations in Early Cretaceous continental rifts of the South Atlantic Ocean." Interpretation 7, no. 4 (2019): SH45—SH69. http://dx.doi.org/10.1190/int-2018-0257.1.

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The Early Cretaceous (135–130 Ma) continental rupture of Western Gondwana to form the South American and African plates closely paralleled the elongate trends of Precambrian and Paleozoic orogenic belts. These orogenic belts were produced as a result of the Neoproterozoic convergent and strike-slip assembly of Gondwana that redeformed during later, Paleozoic orogenic events. Continued continental rifting led to the formation of conjugate, South Atlantic volcanic passive margins whose widths vary from 55 to 180 km. Along-strike variations in crustal stretching, as measured from deep-penetration

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2

SAALMANN, K., M. V. D. REMUS, and L. A. HARTMANN. "Structural evolution and tectonic setting of the Porongos belt, southern Brazil." Geological Magazine 143, no. 1 (2006): 59–88. http://dx.doi.org/10.1017/s0016756805001433.

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The SW–NE-striking Porongos belt, located between juvenile Neoproterozoic rocks in the west and the Dom Feliciano belt, characterized by intense reworking of older crust, in the east, comprises a greenschist to amphibolite-facies metavolcano-metasedimentary succession (Porongos sequence) of unknown age with some exposures of Palaeoproterozoic gneisses (Encantadas gneisses). High-temperature ductile deformation of the basement gneisses comprises at least two magmatic events followed by three deformational phases including folding and shearing (DT1–DT3) and can be attributed to the Palaeoprotero

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MENEZES, NAÉRCIO A., ALEXANDRE C. RIBEIRO, STANLEY WEITZMAN, and RODRIGO A. TORRES. "Biogeography of Glandulocaudinae (Teleostei: Characiformes: Characidae) revisited: phylogenetic patterns, historical geology and genetic connectivity." Zootaxa 1726, no. 1 (2008): 33. http://dx.doi.org/10.11646/zootaxa.1726.1.3.

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The biogeography of the Glandulocaudinae (former Glandulocaudini) is reviewed. The major pattern of diversification presented by this group of freshwater fishes can be clearly associated to the main aspects of the tectonic evolution of the southern portion of the Cis-Andean South American Platform. The phylogenetic relationships within the group suggest that the clade represented by Lophiobrycon is the sister-group of the more derived clade represented by the genus Glandulocauda and Mimagoniates. Lophiobrycon and Glandulocauda occur in areas of the ancient crystalline shield of southeastern Br

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Green, Paul F., Karna Lidmar-Bergström, Peter Japsen, Johan M. Bonow, and James A. Chalmers. "Stratigraphic landscape analysis, thermochronology and the episodic development of elevated, passive continental margins." Geological Survey of Denmark and Greenland (GEUS) Bulletin 30 (December 30, 2013): 1–150. http://dx.doi.org/10.34194/geusb.v30.4673.

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The continental margin of West Greenland is similar in many respects to other elevated, passive continental margins (EPCMs) around the world. These margins are characterised by extensive regions of low relief at elevations of 1–2 kilometres above sea level sloping gently inland, with a much steeper, oceanward decline, often termed a 'Great Escarpment', terminating at a coastal plain. Recent studies, based on integration of geological, geomorphological and thermochronological evidence, have shown that the high topography of West Greenland was formed by differential uplift and dissection of an O

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Franco-Magalhaes, A. O. B., P. C. Hackspacher, U. A. Glasmacher, and A. R. Saad. "Rift to post-rift evolution of a “passive” continental margin: the Ponta Grossa Arch, SE Brazil." International Journal of Earth Sciences 99, no. 7 (2010): 1599–613. http://dx.doi.org/10.1007/s00531-010-0556-8.

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Peace, Alexander L., and J. Kim Welford. "Conjugate margins — An oversimplification of the complex southern North Atlantic rift and spreading system?" Interpretation 8, no. 2 (2020): SH33—SH49. http://dx.doi.org/10.1190/int-2019-0087.1.

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The prevalence of conjugate margin terminology and studies in the scientific literature is testimony to the contribution that this concept and approach has made to the study of passive margins, and more broadly extensional tectonics. However, when applied to the complex rift, transform, and spreading system of the southern North Atlantic (i.e., the passive margins of Newfoundland, Labrador, Ireland, Iberia, and southern Greenland), it becomes obvious that at these passive continental margin settings, additional geologic phenomena complicate this convenient description. These aspects include (1

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7

de Castro, D. L., and F. H. R. Bezerra. "Fault evolution in the Potiguar rift termination, Equatorial margin of Brazil." Solid Earth Discussions 6, no. 2 (2014): 2885–913. http://dx.doi.org/10.5194/sed-6-2885-2014.

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Abstract. The transform shearing between South American and African plates in the Cretaceous generated a series of sedimentary basins on both plate margins. In this study, we use gravity, aeromagnetic, and resistivity surveys to identify fault architecture and to analyse the evolution of the eastern Equatorial margin of Brazil. Our study area is the southern onshore termination of the Potiguar rift, which is an aborted NE-trending rift arm developed during the breakup of Pangea. The Potiguar rift is a Neocomian structure located in the intersection of the Equatorial and western South Atlantic

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Rohais, Sébastien, Sébastien Joannin, Jean-Paul Colin, Jean-Pierre Suc, François Guillocheau, and Rémi Eschard. "Age and environmental evolution of the syn-rift fill of the southern coast of the gulf of Corinth (Akrata-Derveni region, Greece)." Bulletin de la Société Géologique de France 178, no. 3 (2007): 231–43. http://dx.doi.org/10.2113/gssgfbull.178.3.231.

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Abstract The southern coast of the gulf of Corinth exhibits syn-rift deposits, giving insights into the first stages of continental extension as well as the geodynamic evolution of the surrounding Aegean region. The stratigraphy (relative position, 3D geometry, dating) of these deposits is still subject to controversies. The syn-rift evolution of the central part of the southern coast of the Corinth rift is revisited, based on new sedimentological and paleontological data. While ostracods analysis provides precise information about the paleoenvironments, recent advances in palynology supply a

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9

Zavialov, Peter O., Sonia M. F. Gianesella-Galvão, Felipe M. Pimenta, Guilherme P. Castelão, and Sanjar M. Abdoullaev. "Diurnal variability on the continental shelf of Southern Brazil." Continental Shelf Research 20, no. 1 (2000): 15–35. http://dx.doi.org/10.1016/s0278-4343(99)00040-0.

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10

de Castro, D. L., and F. H. R. Bezerra. "Fault evolution in the Potiguar rift termination, equatorial margin of Brazil." Solid Earth 6, no. 1 (2015): 185–96. http://dx.doi.org/10.5194/se-6-185-2015.

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Abstract. The transform shearing between South American and African plates in the Cretaceous generated a series of sedimentary basins on both plate margins. In this study, we use gravity, aeromagnetic, and resistivity surveys to identify architecture of fault systems and to analyze the evolution of the eastern equatorial margin of Brazil. Our study area is the southern onshore termination of the Potiguar rift, which is an aborted NE-trending rift arm developed during the breakup of Pangea. The basin is located along the NNE margin of South America that faces the main transform zone that separa

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11

Sato, Takeshi, Tetsuo No, Ryuta Arai, Seiichi Miura, and Shuichi Kodaira. "Transition from continental rift to back-arc basin in the southern Japan Sea deduced from seismic velocity structures." Geophysical Journal International 221, no. 1 (2020): 722–39. http://dx.doi.org/10.1093/gji/ggaa006.

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SUMMARY We obtain the crustal structure from active-source seismic surveys using ocean bottom seismographs and seismic shots to elucidate the evolutionary process from continental rifting to the backarc basin opening in the Yamato Basin and Oki Trough in the southern Japan Sea. Results show that the crust changes from approximately 14–15 km thick in the basin (the southern Yamato Basin) to 16.5–17 km in the margin of the basin (the southwestern edge of the Yamato Basin). The P-wave velocity distribution in the crust of the southern Yamato Basin is missing a typical continental upper crust with

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Franco-Magalhaes, A. O. B., P. C. Hackspacher, U. A. Glasmacher, and A. R. Saad. "Erratum to: Rift to post-rift evolution of a ‘‘passive’’ continental margin: the Ponta Grossa Arch, SE Brazil." International Journal of Earth Sciences 99, no. 7 (2010): 1615–17. http://dx.doi.org/10.1007/s00531-010-0574-6.

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13

Liu, Mei, Irina Filina, and Paul Mann. "Crustal structure of Mesozoic rifting in the northeastern Gulf of Mexico from integration of seismic and potential fields data." Interpretation 7, no. 4 (2019): T857—T867. http://dx.doi.org/10.1190/int-2018-0259.1.

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We have investigated the crustal structure of a 400 km wide zone of thinned continental crust in the northeastern Gulf of Mexico (GOM) using gravity and magnetic modeling along two deeply penetrated seismic transects. Using this approach, we identify two zones of prominent, southward-dipping reflectors associated with 7–10 km thick, dense, and highly magnetic material. Previous workers have interpreted the zones as either coarse clastic redbeds of Mesozoic age that are tilted within half-grabens or seaward-dipping reflectors of magmatic origin. Both seismic reflection lines reveal a 10 km thic

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Weschenfelder, Jair, Iran Carlos Stalliviere Corrêa, Salvador Aliotta, and Ricardo Baitelli. "Paleochannels related to late quaternary sea-level changes in Southern Brazil." Brazilian Journal of Oceanography 58, spe2 (2010): 35–44. http://dx.doi.org/10.1590/s1679-87592010000600005.

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The geological evolution of the continental shelf and in the coastal zone of southern Brazil during the Quaternary period is addressed in this study. High-resolution seismic records obtained at the Patos Lagoon revealed the presence of channels that deeply dissected the coastal zone before the formation of the modern, low-relief, coastal plain. Two periods of channel incision are inferred, based mainly on seismic records. The paleodrainage paths mapped from the seismic records can be connected with those recognized by previous studies on the adjacent continental shelf and slope. Upstream, the

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15

Megallaa, Maher. "TECTONIC EVOLUTION OF THE GIPPSLAND BASIN AND HYDROCARBON POTENTIAL OF ITS LOWER CONTINENTAL SHELF." APPEA Journal 33, no. 1 (1993): 45. http://dx.doi.org/10.1071/aj92005.

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Tectonic evolution of the Gippsland Basin, particularly for the 120 to 66 Ma period, is reviewed based on the interpretation of BMR Continental Margin Seismic data and industry seismic and well information over the continental shelf. It is revealed that the eastern limit of the Early Cretaceous (120-97 Ma) rift is the Gippsland Rise—a new tectonic element. The Rise is part of a regional deep-seated metamorphosed Palaeozoic lineament belonging to the Tasman Fold Belt upon which the Strzelecki Group onlapped from the west. Two newly-identified transfer fault zones named here, the Eastern Gip

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16

Bingen, Bernard, Joakim Mansfeld, Ellen MO Sigmond, and Holly Stein. "Baltica-Laurentia link during the Mesoproterozoic: 1.27 Ga development of continental basins in the Sveconorwegian Orogen, southern Norway." Canadian Journal of Earth Sciences 39, no. 9 (2002): 1425–40. http://dx.doi.org/10.1139/e02-054.

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Recent models suggest that Laurentia and Baltica were contiguous during the Mesoproterozoic and shared a long-lived active continental margin, subsequently reworked during the Grenvillian orogeny. Around 1.25 Ga, the geological record is dominated by dyke-swarm intrusion, continental rift basin formation, A-type felsic magmatism, and arc back-arc basin development. It points to a dominantly extensional tectonic regime over most of the craton and the Grenvillian margin, suggesting a retreating subduction boundary at that time. In the westernmost allochthonous domain of the Sveconorwegian Orog

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17

de Almeida, Renato P., Liliane Janikian, Antonio Romalino S. Fragoso-Cesar, and André Marconato. "Evolution of a rift basin dominated by subaerial deposits: The Guaritas Rift, Early Cambrian, Southern Brazil." Sedimentary Geology 217, no. 1-4 (2009): 30–51. http://dx.doi.org/10.1016/j.sedgeo.2009.01.010.

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18

Motoki, Akihisa, Luiz Carlos Chaves Novais, Kenji Freire Motoki, Leonardo Costa de Oliveira, Ricardo De Souza Fasolo, and Adrienne Brito Lima. "SATELLITE-DERIVED GRAVIMETRY FOR ABROLHOS CONTINENTAL SHELF, STATES OF ESPÍRITO SANTO AND BAHIA, BRAZIL, AND ITS RELATION TO TECTONIC GENESIS OF SEDIMENTARY BASINS." Revista Brasileira de Geofísica 32, no. 4 (2014): 735. http://dx.doi.org/10.22564/rbgf.v32i4.554.

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ABSTRACT. This paper presents the results of satellite-derived gravimetry for Abrolhos Continental Shelf and the adjacent areas, States of Esp´ırito Santo and Bahia,Brazil, and discusses tectonic genesis of the sedimentary basins. The free-air and Bouguer anomalies on the continental shelf show a gradual increase from coast tocontinental shelf break. The total difference of 135 mGal indicates crust thinning of 4.5 km. The Bouguer anomaly increases beyond the shelf break and continues upto the abyssal plane. The total difference of 260 mGal suggests crustal thinning of 9.0 km. The studied area

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19

DECKERS, JEF, and STEPHEN LOUWYE. "A reinterpretation of the ages and depositional environments of the lower and middle Miocene stratigraphic records in a key area along the southern margin of the North Sea Basin." Geological Magazine 156, no. 3 (2017): 525–32. http://dx.doi.org/10.1017/s0016756817000991.

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AbstractThe stratigraphic reinterpretation of the palynologically analysed Miocene succession of the Wijshagen borehole along the southern margin of the North Sea Basin allowed an age assessment – late Burdigalian to early Serravalian – for the Genk Sand Member of the Bolderberg Formation. The depositional environment varied during Burdigalian to Serravalian times from continental (peat formation) to open marine (glauconitic sands), respectively from south to north in the Roer Valley Rift System. The study area of the Wijshagen borehole is located in the central part of the Roer Valley Rift Sy

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20

Muir, R. A., E. M. Bordy, J. S. V. Reddering, and J. H. A. Viljoen. "Lithostratigraphy of the Enon Formation (Uitenhage Group), South Africa." South African Journal of Geology 120, no. 2 (2017): 273–80. http://dx.doi.org/10.25131/gssajg.120.2.273.

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Abstract The Uitenhage Group represents the earliest deposits that filled Mesozoic rift basins in the southern Cape of South Africa during the fragmentation of the supercontinent Gondwana. The sedimentology of the Enon Formation records the development of alluvial systems that drained the region since the onset of Gondwanan rifting, and therefore plays an important role in our understanding of early landscape evolution along the southern African continental margin. The mostly coarse conglomeratic unit was deposited continuously in actively subsiding, but separated, rift basins. As a result, th

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Corrêa, Iran Carlos Stalliviere, Svetlana Medeanic, Jair Weschenfelder, Elírio Ernestino Toldo Júnior, José Carlos Nunes, and Ricardo Baitelli. "THE PALAEO-DRAINAGE OF THE LA PLATA RIVER IN SOUTHERN BRAZIL CONTINENTAL SHELF." Revista Brasileira de Geofísica 32, no. 2 (2014): 259. http://dx.doi.org/10.22564/rbgf.v32i2.481.

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ABSTRACT. This paper addresses the characterization of the geomorphology and palaeo-evolution of the La Plata River on the south Brazilian continental shelf,through bathymetric data and sedimentary and palynological analysis from sediment core samples. The analysis allowed us to characterize a transgressive depositionalsequence in the La Plata River palaeo-channel. The palynological sequences revealed continental fresh water environments, that involved into lagoonal and mixohalineenvironments and then into shallow marine environments towards the top, thus characterizing a fluvial-estuarine env

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Hoal, B. G. "The Proterozoic Sinclair Sequence in southern Namibia: intracratonic rift or active continental margin setting?" Precambrian Research 63, no. 1-2 (1993): 143–62. http://dx.doi.org/10.1016/0301-9268(93)90009-q.

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23

Liu, Yutao, Chun-Feng Li, Yonglin Wen, et al. "Mantle serpentinization beneath a failed rift and post-spreading magmatism in the northeastern South China Sea margin." Geophysical Journal International 225, no. 2 (2021): 811–28. http://dx.doi.org/10.1093/gji/ggab006.

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SUMMARY The post-spreading magmatic activities in the northeastern South China Sea (SCS) margin are very strong, evidenced by widely distributed high-velocity lower crust (HVLC) and numerous volcanoes. However, there are large contrasts in magmatic activities and crustal structure between the Southern Depression (TSD) of the Tainan Basin and the volcanic continental slope area further south. We analyse their crustal P-wave velocity structures based on a newly acquired wide-angle ocean bottom seismic data set. The Cenozoic strata below the TSD, a Cenozoic failed rift, are relatively thick (∼3–4

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Silva, Cleverton Correia, Valmir da Silva Souza, Nilson Francisquini Botelho, and Elton Luiz Dantas. "Contribution to petrogenesis of the Paleoproterozoic Basaltic Magmatism from the Araí continental rift, central Brazil." Journal of South American Earth Sciences 110 (October 2021): 103345. http://dx.doi.org/10.1016/j.jsames.2021.103345.

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PIMENTEL, MÁRCIO M., and NILSON F. BOTELHO. "Sr and Nd isotopic characteristics of 1.77-1.58 Ga rift-related granites and volcanics of the Goiás tin province, central Brazil." Anais da Academia Brasileira de Ciências 73, no. 2 (2001): 263–76. http://dx.doi.org/10.1590/s0001-37652001000200010.

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Supracrustal rocks of the Araí Group, together with coeval A-type granites represent a ca. 1.77-1.58 Ga old continental rift in Brazil. Two granite families are identified: the older (1.77 Ga) group forms small undeformed plutons, and the younger granites (ca. 1.58 Ga) constitute larger, deformed plutons. Sr-Nd isotopic data for these rocks indicate that the magmatism is mostly product of re-melting of Paleoproterozoic sialic crust. Initial Sr ratios for both granite families are ca 0.726 and 0.720. Most TDM model ages are between 2.58 and 1.80 Ga. epsilonND(T) values are between +3.6 and -11.

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Lana, Paulo Cunha, Cinthya S. G. Santos, André R. S. Garraffoni, Verônica M. Oliveira, Verônica M. Oliveira, and Vasily Radashevsky. "Checklist of polychaete species from Paraná state (Southern Brazil)." Check List 2, no. 3 (2006): 30. http://dx.doi.org/10.15560/2.3.30.

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A checklist of polychaete species recorded from Paraná State (Southern Brazil, 25°10’– 25°58’ S / 47°59’– 48°35’ W), including estuarine areas from Paranaguá and Guaratuba Bays and shallow continental shelf bottoms, is reported. Altogether 44 families, 164 genera, and 259 valid species are currently known from the area. The list, which provides a synthesis of the regional taxonomical work carried out until now, can serve as a baseline survey for future studies.

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Resgalla Jr, Charrid. "The holoplankton of the Santa Catarina coast, southern Brazil." Anais da Academia Brasileira de Ciências 83, no. 2 (2011): 575–88. http://dx.doi.org/10.1590/s0001-37652011000200017.

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This paper presents information from different sampling surveys carried out along the Santa Catarina coast in order to outline the biogeographical characteristics of the zooplankton in this region and identify species or groups of species with potential use as bioindicators. Based on a checklist of species of the zooplankton community in the state, it was observed that, in the warmer months of the year, the fauna is similar to that of the states of Paraná and São Paulo (e.g. Creseis virgula f. virgula, Penilia avirostris; Acartia lilljeborgi and Oithona oswaldocruzi), while in the colder month

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28

Smellie, John L. "Chapter 1.2 Antarctic volcanism: volcanology and palaeoenvironmental overview." Geological Society, London, Memoirs 55, no. 1 (2021): 19–42. http://dx.doi.org/10.1144/m55-2020-1.

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AbstractSince Jurassic time (c.200 Ma), Antarctica has had a greater diversity of volcanism than other southern continents. It includes: (1) voluminous mafic and felsic volcanism associated with the break-up of Gondwana; (2) a long-lived continental margin volcanic arc, including back-arc alkaline volcanism linked to slab rollback; (3) small-volume mafic alkaline volcanism associated with slab-window formation; and (4) one of Earth's major continental rift zones, the West Antarctic Rift System (WARS), with its numerous large alkaline central volcanoes. Several of Antarctica's volcanoes are sti

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29

Li, Yalong, Wei Yue, Xun Yu, et al. "Tectonic Evolution of the West Bogeda: Evidences from Zircon U-Pb Geochronology and Geochemistry Proxies, NW China." Minerals 10, no. 4 (2020): 341. http://dx.doi.org/10.3390/min10040341.

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The Bogeda Shan (Mountain) is in southern part of the Central Asian Orogenic Belt (CAOB) and well preserved Paleozoic stratigraphy, making it an ideal region to study the tectonic evolution of the CAOB. However, there is a long-standing debate on the tectonic setting and onset uplift of the Bogeda Shan. In this study, we report detrital zircon U-Pb geochronology and whole-rock geochemistry of the Permian sandstone samples, to decipher the provenance and tectonic evolution of the West Bogeda Shan. The Lower-Middle Permian sandstone is characterized by a dominant zircon peak age at 300–400 Ma, s

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30

Köykkä, Juha, and Jarkko Lamminen. "Tidally influenced clastic epeiric sea at a Mesoproterozoic continental margin, Rjukan Rift Basin, southern Norway." Precambrian Research 185, no. 3-4 (2011): 164–82. http://dx.doi.org/10.1016/j.precamres.2010.12.005.

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Phach, Phung Van, and Le Duc Anh. "Tectonic evolution of the southern part of Central Viet Nam and the adjacent area." Geodynamics & Tectonophysics 9, no. 3 (2018): 801–25. http://dx.doi.org/10.5800/gt-2018-9-3-0372.

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Interpretations of seismic, gravity and magnetic anomalies and structural data on the coastal zone of southern part of Central Viet Nam (SCVN) and the adjacent Tertiary basins suggest several phases in the tectonic evolution of the study region since the Late Cretaceous to Quaternary. In this paper, we try to clarify the tectonic evolution of SCVN and the adjacent continental margin. The Cretaceous – Paleocene tectonic phase commenced after cessation of the West Pacific plutonic magmatic activity that produced numerous diabases and aplite dykes of mainly sub-meridian orientation. It was charac

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PACIULLO, FABIO VITO PENTAGNA, ANDRÉ RIBEIRO, RENATO RODOLFO ANDREIS, and RUDOLPH ALLARD JOHANNES TROUW. "THE ANDRELÂNDIA BASIN, A NEOPROTEROZOIC INTRAPLATE CONTINENTAL MARGIN, SOUTHERN BRASÍLIA BELT, BRAZIL." Revista Brasileira de Geociências 30, no. 1 (2000): 200–202. http://dx.doi.org/10.25249/0375-7536.2000301200202.

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Zavialov, Peter, Osmar Möller, and Edmo Campos. "First direct measurements of currents on the continental shelf of Southern Brazil." Continental Shelf Research 22, no. 14 (2002): 1975–86. http://dx.doi.org/10.1016/s0278-4343(02)00049-3.

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RAMALHO, LAÍS V., and LAURO CALLIARI. "Bryozoans from Rio Grande do Sul Continental Shelf, Southern Brazil." Zootaxa 3955, no. 4 (2015): 569. http://dx.doi.org/10.11646/zootaxa.3955.4.8.

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Salomon, Eric, Cees Passchier, and Daniel Koehn. "Asymmetric continental deformation during South Atlantic rifting along southern Brazil and Namibia." Gondwana Research 51 (November 2017): 170–76. http://dx.doi.org/10.1016/j.gr.2017.08.001.

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Modenesi-Gauttieri, May Christine, Silvio Takashi Hiruma, and Claudio Riccomini. "Morphotectonics of a high plateau on the northwestern flank of the Continental Rift of southeastern Brazil." Geomorphology 43, no. 3-4 (2002): 257–71. http://dx.doi.org/10.1016/s0169-555x(01)00137-4.

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Vasconcelos, David L., Francisco H. R. Bezerra, Walter E. Medeiros, et al. "Basement fabric controls rift nucleation and postrift basin inversion in the continental margin of NE Brazil." Tectonophysics 751 (January 2019): 23–40. http://dx.doi.org/10.1016/j.tecto.2018.12.019.

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Giro, João Paulo, Julio Almeida, Eliane Guedes, and Henrique Bruno. "Tectonic inheritances in rifts: The meaning of NNE lineaments in the continental rift of SE-Brazil." Journal of South American Earth Sciences 108 (June 2021): 103225. http://dx.doi.org/10.1016/j.jsames.2021.103225.

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de Castro, David Lopes, Francisco Hilário Bezerra, Reinhardt Adolfo Fuck, and Roberta Mary Vidotti. "Geophysical evidence of pre-sag rifting and post-rifting fault reactivation in the Parnaíba basin, Brazil." Solid Earth 7, no. 2 (2016): 529–48. http://dx.doi.org/10.5194/se-7-529-2016.

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Abstract. This study investigated the rifting mechanism that preceded the prolonged subsidence of the Paleozoic Parnaíba basin in Brazil and shed light on the tectonic evolution of this large cratonic basin in the South American platform. From the analysis of aeromagnetic, aerogravity, seismic reflection and borehole data, we concluded the following: (1) large pseudo-gravity and gravity lows mimic graben structures but are associated with linear supracrustal strips in the basement. (2) Seismic data indicate that 120–200 km wide and up to 300 km long rift zones occur in other parts of the basin

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Bosworth, William, and Daniel F. Stockli. "Early magmatism in the greater Red Sea rift: timing and significance." Canadian Journal of Earth Sciences 53, no. 11 (2016): 1158–76. http://dx.doi.org/10.1139/cjes-2016-0019.

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Throughout the greater Red Sea rift system the initial late Cenozoic syn-rift strata and extensional faulting are closely associated with alkali basaltic volcanism. Older stratigraphic units are either pre-rift or deposited during pre-rupture mechanical weakening of the lithosphere. The East African superplume appeared in northeast Africa ∼46 Ma but was not accompanied by any significant extensional faulting. Continental rifting began in the eastern and central Gulf of Aden at ∼31–30 Ma coeval with the onset of continental flood volcanism in northern Ethiopia, Eritrea, and western Yemen. Volca

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Upton, Brian G. J. "Tectono-magmatic evolution of the younger Gardar southern rift, South Greenland." Geological Survey of Denmark and Greenland (GEUS) Bulletin 29 (November 8, 2013): 1–24. http://dx.doi.org/10.34194/geusb.v29.4692.

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The 1300–1140 Ma Gardar period in South Greenland involved continental rifting, sedimentation and alkaline magmatism. The latest magmatism was located along two parallel rift zones, Isortoq–Nunarsuit in the north and the Tuttutooq–Ilimmaasaq–Narsarsuaq zone in the south addressed here. The intrusive rocks crystallised at a depth of troctolitic gabbros. These relatively reduced magmas evolved through marked iron enrichment to alkaline salic differentiates. In the Older giant dyke complex, undersaturated augite syenites grade into sodalite foyaite. The larger, c . 1163 Ma Younger giant dyke comp

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Ryazantsev, A. V., L. A. Novikov, and A. A. Razumovskij. "Carboniferous continental margin mafic-ultramafic sheeted dyke complex in the West Magnitogorsk zone (Southern Urals)." Proceedings of higher educational establishments. Geology and Exploration, no. 3 (June 28, 2019): 42–50. http://dx.doi.org/10.32454/0016-7762-2019-3-42-50.

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In the West of the aHochthon of Magnitogorsk zone thrusted onto the Precambrian complexes of the Uraltau zone, the Devonian island-arc complexes overlap stratigraphicalry the Ordovician and Silurian chert-basalt sequences and serpentine melange. Melange and Ordovician strata are intruded by dyke swarms and sheeted dykes («dyke in dyke») which are composed of mafic and ultramafic rocks. The dykes, composed by gabbro-dolerite, amphibole K-feldspar gabbro, hornblendite, picrite and lamprophyre, predominate. The composition of the ultramafic rocks corresponds to the composition of picrite and koma

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DE OLIVEIRA, VERÔNICA MARIA, DANNY EIBYE JACOBSEN, and PAULO LANA. "Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil." Zootaxa 4444, no. 2 (2018): 120. http://dx.doi.org/10.11646/zootaxa.4444.2.2.

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Four new species of Paranaitis are described from estuarine and continental shelf bottoms from southern and southeastern Brazil: Paranaitis chitinosa sp. nov., P. cirriformata sp. nov., P. assimetrica sp. nov., and P. cordiformata sp. nov. Paranaitis chitinosa sp. nov. is diagnosed by a proboscis with rows of conical and chitinous papillae alternating with dorsal chitinous bars, and the distal extremity covered with micropapillae, and dorsal cirri rounded and asymmetrical. Paranaitis cirriformata sp. nov. is similar to P. speciosa (Webster, 1879), previously recorded from Brazil, but differs b

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Fournier, François, Aurélie Tassy, Isabelle Thinon, et al. "Pre-Pliocene tectonostratigraphic framework of the Provence continental shelf (eastern Gulf of Lion, SE France)." Bulletin de la Société Géologique de France 187, no. 4-5 (2016): 187–215. http://dx.doi.org/10.2113/gssgfbull.187.4-5.187.

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AbstractThe seaward extension of onshore formations and structures were previously almost unknown in Provence. The interpretation of 2D high-resolution marine seismic profiles together with the integration of sea-bottom rock samples provides new insights into the stratigraphic, structural and paleogeographic framework of pre-Messinian Salinity Crisis (MSC) deposits of the Provence continental shelf. Seven post-Jurassic seismic units have been identified on seismic profiles, mapped throughout the offshore Provence area and correlated with the onshore series. The studied marine surface and sub-s

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Marques, Claudio Cesar S., Claudio Limeira Mello, and Renato R. Cabral Ramos. "Análise multiescalar de atributos sedimentares em depósitos fluviais paleogênicos na Bacia de Volta Redonda, RJ." Anuário do Instituto de Geociências 29, no. 2 (2006): 168–98. http://dx.doi.org/10.11137/2006_2_168-198.

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This study aims to perform a multi-scale analysis of the sedimentary attributes presented by Paleogene fluvial deposits of the Volta Redonda Basin (Continental Rift of Southeastern Brazil), including the characterization of sedimentary facies, depositional architecture and petrographical features. The results from this study may be applied to the modelling of fluid behaviour inside fluvial reservoir-rocks. Among the studied deposits are the main aquifers of the sedimentary basins which compose the Continental Rift of Southeastern Brazil. The methodologic framework comprised: interpretation of

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Muelbert, JH, and C. Sinque. "Distribution of Bluefish (Pomatomus saltatrix) Larvae along the Continental Shelf off Southern Brazil." Marine and Freshwater Research 47, no. 2 (1996): 311. http://dx.doi.org/10.1071/mf9960311.

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Data from ichthyoplankton surveys between 1980 and 1990 are used to describe the distribution of bluefish (Pomatomus saltatrix) larvae along the continental shelf off southern Brazil (24�-35�S). Only 46 larvae in 9 stations were found in 1026 oblique and horizontal tows taken with a 330 pm-mesh Bongo net. Larvae ranged in size from 3 to 10 mm, with the larger larvae distributed close to shore. There were no significant differences in size between larvae found in the northern and southern regions of the shelf. However, there was evidence of a gradual northward displacement of larval abundance t

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SALLUM, MARIA ANICE MUREB, CECILIA L. S. DOS SANTOS, and RICHARD C. WILKERSON. "Studies on Anopheles (Kerteszia) homunculus Komp (Diptera: Culicidae)." Zootaxa 2299, no. 1 (2009): 1–18. http://dx.doi.org/10.11646/zootaxa.2299.1.1.

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The present findings suggest that Anopheles (Kerteszia) homunculus may comprise more than one species. The rDNA ITS2 sequence data corroborate the presence of An. homunculus l.s. in Mata Atlântica, southern Brazil, and suggest that specimens from Trinidad may belong to an unnamed morphologically similar species. There is a need for additional studies to establish the geographical distribution of An. homunculus l.s. in continental South America and in Trinidad, especially in southern Mata Atlântica, Brazil.

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Sasseville, C., K. Y. Tomlinson, A. Hynes, and V. McNicoll. "Stratigraphy, structure, and geochronology of the 3.02.7 Ga Wallace Lake greenstone belt, western Superior Province, southeast Manitoba, Canada." Canadian Journal of Earth Sciences 43, no. 7 (2006): 929–45. http://dx.doi.org/10.1139/e06-041.

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In western Superior province, the North Caribou terrane (NCT) constitutes a Mesoarchean proto-continent heavily overprinted by Neoarchean magmatism and deformation resulting from the western Superior Province accretion. Locally, along the southern margin of the NCT, Mesoarchean (~3.0 Ga) rift sequences are preserved. These sequences are of key importance to our understanding of the early tectonic evolution of continental crust. The Wallace Lake greenstone belt is located at the southern margin of the NCT and includes the Wallace Lake assemblage, the Big Island assemblage, the Siderock Lake ass

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Hill, K. A., D. M. Finlayson, K. C. Hill, and G. T. Cooper. "MESOZOIC TECTONICS OF THE OTWAY BASIN REGION: THE LEGACY OF GONDWANA AND THE ACTVE PACIFIC MARGIN—A REVIEW AND ONGOING RESEARCH." APPEA Journal 35, no. 1 (1995): 467. http://dx.doi.org/10.1071/aj94030.

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Mesozoic extension along Australia's southern margin and the evolution and architecture of the Otway Basin were probably controlled by three factors: 1) changes in global plate movements driven by mantle processes; 2) the structural grain of Palaeozoic basement; and, 3) changes in subduction along Gondwana's Pacific margin. Major plate realignments controlled the Jurassic onset of rifting, the mid-Cretaceous break-up and the Eocene onset of rapid spreading in the Southern Ocean.The initial southern margin rift site was influenced by the northern limit of Pacific margin (extensional) Jurassic d

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Lavoie, Denis, Elliott Burden, and Daniel Lebel. "Stratigraphic framework for the CambrianOrdovician rift and passive margin successions from southern Quebec to western Newfoundland." Canadian Journal of Earth Sciences 40, no. 2 (2003): 177–205. http://dx.doi.org/10.1139/e02-078.

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The Taconian Humber Zone stretches from western Newfoundland to southern Quebec. The Early Cambrian slope succession in Newfoundland is found in the Curling Group, whereas in Quebec, various units were deposited during that first time slice. Biostratigraphic data allow correlation of the Curling Group with the Labrador Group in Newfoundland and with the newly time-constrained slope succession in Quebec. The end of the riftdrift transition is marked by a sea-level lowstand at the end of the Early Cambrian. The Middle Cambrian to latest Early Ordovician passive margin history recorded five cycl

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