SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Rossetti,Dilce F.; Góes,Ana M.; Bezerra,Francisco H.R.; Valeriano,Márcio M.; Brito-Neves,Benjamim B.; Ochoa,Felipe L..

Several publications have contributed to improve the stratigraphy of the Paraíba Basin in northeastern Brazil. However, the characterization and distribution of sedimentary units in onshore areas of this basin are still incomplete, despite their significance for reconstructing the tectono-sedimentary evolution of the South American passive margin. This work provides new information to differentiate among lithologically similar strata, otherwise entirely unrelated in time. This approach included morphological, sedimentological and stratigraphic descriptions based on surface and sub-surface data integrated with remote sensing, optically stimulated luminescence dating, U+Th/He dating of weathered goethite, and heavy mineral analysis. Based on this study, it...

Delineating shallow Neogene deformation structures in northeastern Pará State using Ground Penetrating Radar

Palavras-chave: Morphology; Sedimentology; Stratigraphy; Chronology; Tectonics; Paraíba Basin.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200007

Rossetti,Dilce F..

The geological characterization of shallow subsurface Neogene deposits in northeastern Pará State using Ground Penetrating Radar (GPR) revealed normal and reverse faults, as well as folds, not yet well documented by field studies. The faults are identified mostly by steeply-dipping reflections that sharply cut the nearby reflections causing bed offsets, drags and rollovers. The folds are recognized by reflections that are highly undulating, configuring broad concave and convex-up features that are up to 50 m wide and 80 to 90 ns deep. These deformation structures are mostly developed within deposits of Miocene age, though some of the faults might continue into younger deposits as well. Although the studied GPR sections show several diffractions caused by...

Evolution of the Glorieuses seamount in the SW Indian Ocean and surrounding deep Somali Basin since the Cretaceous

Palavras-chave: Neogene; Northeastern Pará State; Ground Penetrating Radar; Tectonics; Sedimentary rocks.

Ano: 2003

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000200009

Geological sampling in deep water: A new instrument is necessary.

Leroux, Estelle; Counts, J.; Jorry, Stephan; Jouet, Gwenael; Révillon, Sidonie; Boudagher-fadel, M.k.; Courgeon, S.; Berthod, C.; Ruffet, G.; Bachèlery, P.; Grenard-grand, E..

Little is known about the geological history of the Glorieuses seamount including basic information about its age and origin related to the regional evolution of the southern tip of the Somali Basin. This study focused on describing and reconstructing the long-term stratigraphic evolution of the Glorieuses seamount (SW Indian Ocean) to identify the mechanisms that have occurred through time to finally shape the emerged modern islands. Distinct terrace levels, currently submerged along the flanks of the seamount and surrounding seamounts, have already been interpreted as resulting from successive carbonate development and back-stepping episodes over the last 62 Myr. New isotopic and biostratigraphic dating on the flanks of the seamount, coupled with...

Tipo: Text

Palavras-chave: Glorieuses seamount; Somali Basin; Seismic stratigraphy; Tectonics; Vertical movement (uplift and subsidence); Volcanism; Shallow-water carbonate platform; Ar-40/Ar-39.

Ano: 2020

URL: https://archimer.ifremer.fr/doc/00628/73965/73324.pdf

Islands: Palaeontology, Geology and Tectonics

Girardeau, J; Auzende, Jean-marie; Boillot, G.

The Nautile submersible is used to observe the underwater geological structures and to conduct geological sampling in deep water. But it is not sufficient because it is not possible to measure the faults in the oceanic rifts.

Tipo: Text

Palavras-chave: Faults; Palaeomagnetism; Tectonics; Submersibles; Surveying underwater; Surveys; Seafloor sampling; Marine technology; Deep water.

Ano: 1990

URL: http://archimer.ifremer.fr/doc/1990/acte-1154.pdf

Donovan, S.K..

The intention of this Lyell Meeting is to bring together tectonicists, geologists, palaeontologists and geomorphologists to discuss the intersection of their specialisms in the geology of islands.

Late quaternary dynamics in the Madeira river basin, southern Amazonia (Brazil), as revealed by paleomorphological analysis

Palavras-chave: Lyell meetings; Islands; Geology; Palaeontology; Tectonics; Evolution; Isolation; 38.20; 38.37; 38.22.

Ano: 2011

URL: http://www.repository.naturalis.nl/record/428038

Hayakawa,Ericson H.; Rossetti,Dilce F..

Ancient drainage systems are being increasingly documented in the Amazon basin and their characterization is crucial for reconstructing fluvial evolution in this area. Fluvial morphologies, including elongate belts, are well preserved along the Madeira River. Digital Elevation Model from the Shuttle Radar Topography Mission favored the detection of these features even where they are covered by dense rainforest. These paleomorphologies are attributed to the shifting position of past tributaries of the Madeira River through avulsions. These radial paleodrainage networks produced fan-shaped morphologies that resemble distributary megafans. Distinguishing avulsive tributary systems from distributary megafans in the sedimentary record is challenging. Madeira´s...

Método morfo-estructural para la identificación de paleoeventos tecto-sísmicos: Aplicación a la zona costera de San Lorenzo, norte de Ecuador

Palavras-chave: Paleochannels; Amazon Basin; Madeira river; Remote sensing; Climate; Tectonics.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100029

OceanDocs

Santana, E.; Dumont, J.F.; Valdez, F.; Pazmiño, N.; Tihay, J.P.; Usselmann, P.; López, E..

Se presentan evidencias de cambios morfológicos que implican la ocurrencia de movimientos relacionados con la actividad sísmica de la zona. En particular se enfoca en esta publicación un método de identificación de los eventos extremos que pueden ocurrir en estas áreas.

Tipo: Journal Contribution

Palavras-chave: Tectonics; Drainage water; Geological time; Marine geology; Tectonics; Marine geology; Drainage water; Http://aims.fao.org/aos/agrovoc/c_31904; Http://aims.fao.org/aos/agrovoc/c_4612; Http://aims.fao.org/aos/agrovoc/c_2374.

Ano: 2005

URL: http://hdl.handle.net/1834/2407

Misinterpreting by localism: transposing European geology and tectonics onto Antillean islands

Donovan, S.K..

Le Grand (1988, pp. 80-81, 97) defined ‘localism’ “when geologists are most influenced by data found close to them in time and space and within their own disciplinary specialties”. Jamaica has been prone to localist interpretations made by some of its most notable geologists.

Structural control over well productivity in the Jundiaí River Catchment, Southeastern Brazil

Palavras-chave: Localism; Tectonics; Geology; Jamaica; Antilles; 38.36; 38.10.

Ano: 2011

URL: http://www.repository.naturalis.nl/record/428047

Neves,Mirna A.; Morales,Norberto.

The well productivity in crystalline terrains is extremely changeable and depends on external factors, in addition to the intrinsic properties of rocks. In the Jundiaí River Catchment, Southeastern Brazil, the main factor that influences well productivity is the existence of open discontinuities permeability in geologic environments that favor groundwater recharge. In that area, Pre-Cambrian shear and fault zones were reactivated throughout geologic time, controlling the morphostructural compartments and the Cenozoic sedimentary deposition. Superposition of productivity data and structural maps showed that more productive wells are concentrated mainly along the regional geologic structures. The structural control over well productivity is also noticeable...

Structural controls on polyphase hydrothermal dolomitization in the Kinta Valley, Malaysia: Paragenesis and regional tectono-magmatism

Palavras-chave: Groundwater; Crystalline rocks; Tectonics; Jundiaí; Southeastern Brazil.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000200012

Tectonic and sedimentary controls on widespread gas emissions in the Sea of Marmara: Results from systematic, shipborne multibeam echo sounder water column imaging

Ramkumar, Mu; Siddiqui, Numair Ahmed; Mathew, Manoj; Sautter, Benjamin; Hui, Poon Xin; Nagarajan, R.; Breitfeld, H. Tim; Santosh, M.; Menier, David; Poppelreiter, Michael.

In the eastern side of the Malay Peninsula, thick successions of limestone formations preserve important records of the Mesozoic and Cenozoic tectonic events. Here we investigate the strata- and fracture-bound hydrothermal dolomites in the Palaeozoic carbonates of the Kinta Valley, western Peninsular Malaysia. Based on their textural and morphologic characteristics, structural relationships with the host rock, different facies types, and associations with hydrothermal calcite and low-grade metamorphic marble, we attempt to trace their polyphase origin and relationship with thereto-tectonic events of the region. A detailed evaluation of the nature of brecciation and crystallization of polyphase dolomites, dolomitic limestones, limestones and marble, under...

Tipo: Text

Palavras-chave: Hydrothermal dolomite; Tectonics; Magmatism; Paragenesis; Structural evolution; Malaysia.

Ano: 2019

URL: https://archimer.ifremer.fr/doc/00637/74938/83485.pdf

Tectonic control on the stratigraphic framework of Late Pleistocene and Holocene deposits in Marajó Island, State of Pará, eastern Amazonia

Dupre, Stephanie; Scalabrin, Carla; Grall, Celine; Augustin, Jean-marie; Henry, Pierre; Sengor, A. M. Celal; Goeruer, Naci; Cagatay, M. Namik; Geli, Louis.

Understanding of the evolution of fluid-fault interactions during earthquake cycles is a challenge that acoustic gas emission studies can contribute. A survey of the Sea of Marmara using a shipborne, multibeam echo sounder, with water column records, provided an accurate spatial distribution of offshore seeps. Gas emissions are spatially controlled by a combination of factors, including fault and fracture networks in connection to the Main Marmara Fault system and inherited faults, the nature and thickness of sediments (e.g., occurrence of impermeable or gas-bearing sediments and landslides), and the connectivity between the seafloor and gas sources, particularly in relation to the Eocene Thrace Basin. The relationship between seepage and fault activity is...

Tipo: Text

Palavras-chave: Fluid emissions; Gas; Water column acoustics; Multibeam echo sounder; Sea of Marmara; Tectonics.

Ano: 2015

URL: http://archimer.ifremer.fr/doc/00268/37972/36049.pdf

Rossetti,Dilce F..

The traditional view that the Brazilian Amazonia is located in a tectonically stable area since the Cretaceous is changing in front of the increasing documentation of fault reactivations even during the Holocene. How the sedimentary record has responded to these events is an issue that remains to be approached with basis on field data. This work focuses on the stratigraphic correlation of late Quaternary deposits from eastern Marajó Island, with the goal of demonstrating the role of fault reactivation on the origin and preservation of these deposits. Despite the location in a stable platform of a continental passive margin, three studied stratigraphic units display significant vertical offsets that define two depocenters that are better explained through...

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

Palavras-chave: Amazonia; Tectonics; Quaternary; Stratigraphic framework; Radiocarbon dating; Sedimentation.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200020

Neotropical Ichthyology

Ribeiro,Alexandre Cunha.

The eastern Brazilian coastal drainages are of great biogeographical significance, because of their highly endemic fish faunas. Phylogenetic patterns suggest a close biotic relationship between the rivers that flow into the Atlantic and those on the adjacent upland crystalline shield. However, little has been said on the dynamics of the geological processes causally related to the cladogenetic events between these areas. Distributional and phylogenetic patterns suggest a close association with the geological history of the passive continental margin of South America, from the Cretaceous to the present day. In this area megadome uplifts, rifting, vertical movements between rifted blocks and the erosive retreat of the South American eastern continental...

Tectonics at the axis of the very slow spreading Southwest Indian Ridge: Insights from TOBI side-scan sonar imagery

Palavras-chave: Fishes; Distributional Patterns; Passive Margin; South America; Tectonics.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200009

Tectonics, islands and island hopping in the Early Palaeozoic benthos

Gomez, O; Briais, Anne; Sauter, D; Mendel, V.

We present the analysis of the deformation in the axial valley of two contrasted regions of the very slow spreading Southwest Indian Ridge based on side-scan sonar images. Our objective is to investigate how the obliquity is accommodated along the system. We show that the robust magmatic segments have axial valleys and major faults subperpendicular to spreading. The other sections show fault populations with various degrees of obliquity, often arranged in left-stepping echelons, accommodating part of the strike-slip deformation. Side-scan sonar reveals the presence of a corrugated surface near 59 degrees E interpreted to be an incipient detachment fault. We show that the large width of the SWIR oblique sections, and the difference in tectonic style between...

Tipo: Text

Palavras-chave: Mid-ocean ridges; Side-scan sonar; Tectonics; Discontinuities.

Ano: 2006

URL: https://archimer.ifremer.fr/doc/00234/34567/33236.pdf

Harper, D.A.T.; Liljeroth, M.; Rasmussen, C.M.Ø..

Analyses confirm the roles of the oceanic provinces as both cradles and museums of evolution (Harper & Mac Niocaill, 2002), with reference to the development of the global brachiopod fauna through the Floian-Sandbian (mid Early – early Late Ordovician) interval. Moreover, groups of taxa with particularly widespread distributions during the Dapingian-Darriwilian were possible island hoppers, taking advantage of the spectrum of disparate terranes generated by the magmatic and tectonic activity of the period.

The Paleogene Richmond Formation of Jamaica: Not an impact related succession - a comment

Palavras-chave: Tectonics; Islands; Island hopping; Palaeozoic; Ordivician; Craddle of evolution; Museum of evolution; 38.22; 38.36.

Ano: 2011

URL: http://www.repository.naturalis.nl/record/428058

James, K.H..

Donovan & Pickerill published a short paper in 2008 which was essentially a comment on just part of an earlier contribution (James, 2005) on a broader topic. Although the latter was published in Caribbean Journal of Earth Sciences, to which Donovan & Pickerill originally submitted their paper, this journal has not been published since late 2005. Of necessity, this discussion has moved elsewhere.

The Paleogene Richmond Formation of Jamaica: Not an impact-related succession

Palavras-chave: Jamaica; Paleogene; Richmond Formation; Tectonics; K/T event; 38.20.

Ano: 2009

URL: http://www.repository.naturalis.nl/record/313867

Donovan, S.K.; Pickerill, R.K..

James speculated that Paleogene ‘flysch-wildflysch’ deposits of the Caribbean region may all have a related genesis associated with one or more bolide impacts. The principal arguments used to promote this idea were: (1) that many successions may have been dated incorrectly and are actually related to the end Cretaceous (K/T) event and/or other bolide impacts; and (2) common olistostromes may have been transported by impact-related phenomena. The deposits discussed by James included the Richmond and Font Hill formations of Jamaica. The Richmond Formation of the Wagwater Belt is Paleogene, not Cretaceous, and olistostromic blocks are a common feature of the sedimentary succession of Jamaica. No extraterrestrial event need be invoked to support their...