Navegando por Orientadores "TRUCKENBRODT, Werner Hermann Walter"

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Análise faciológica e aspectos estruturais da formação Águas Claras, região central da Serra dos Carajás-PA
(Universidade Federal do Pará, 1995-01-31) NOGUEIRA, Afonso César Rodrigues; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Aspectos diagenéticos dos Arenitos Bom Gosto - área leste da Bacia de Barreirinhas - (MA)
(Universidade Federal do Pará, 1986-10-17) CORRÊA, José Augusto Martins; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Caracterização faciológica e diagenética da Formação Barro Duro-Bacia de Barreirinhas
(Universidade Federal do Pará, 1990-06-06) ROSSETTI, Dilce de Fátima; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Caracterização paleoambiental dos sedimentos Códo-Grajaú, Bacia de São Luis (MA)
(Universidade Federal do Pará, 1992-06-25) BATISTA, Ana Maria Nunes; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Estudo sedimentológico da formação Pedra de Fogo-Permiano: Bacia do Maranhão
(Universidade Federal do Pará, 1979-10-17) FARIA JUNIOR, Luis Ercílio do Carmo; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
The Pedra de Fogo Formation of the Early-Middle-Permian in the Maranhão Basin is characterized by a ciclic sedimentation with fine sandstone intercalated with siltstones, shales and carbonatic banks which have abundant sílex beds and concretions. On surface this unit is divided into three members named Basal' Silex, Middle and Upper, Trisidela. Silicified oolites, pellets, coquinas with ' fish remains, stromatolitic beds and wood remains are found in the Pedra de Fogo. Formation sediments. The lithologies indicate a shallow, restricted, marine environment ' with two transgressions phases separated by a regression phase. The lateral facies changes reflect the sedimentary dynamism and suggest that the marine environment progressed from a transitional, deltaic to shallow neritic one. The main source areas of the clastic sediments and some of the sílica are, located in the northestern to the southern parts of the Basin and derived ' from the Borborema and São Francisco Provinces rockes. The Tocantins and. Tapajós Provinces to the west and southest have supplied material also. The climate during the Pedra de Fogo sedimentation has varied from moderate to arid as a consequence of the northward South American continent slow migration. The Maranhão had tectonic stability during the Permian. The marine in cursions took place from west, through the Amazonas Basin. Besed on the cyclothemes thickness, it seems that the Pedra de Fogo sedimentation occured from the water level oscilations in the Basin, which had also motivated the transgressions and regressions phases and whose origin should be related to the climatic changes during the Permian time.
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Estudo sedimentológico dos paleocanais da região do rio Paracauari, Ilha de Marajó - estado do Pará
(Universidade Federal do Pará, 1981-11-19) BEMERGUY, Ruth Léa; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
This investigations deals with the paleochannels of the Paracauari river In the northeastern region of Marajó island, based on the photogeological interpretation of maps (scale: 1:20.000) and Sedimentological studies of 13 holes with maximun depth of 50 meters. Morphologically the paleochannels are caracterized by meandering forms and are easily recognized by the vegetation and topographic features. The paleochannels are constituted of texturally mature and well sorted sands. The study of the heavy minerals fractions shows that following species are more importante: tourmaline, staurolite, zircon, andalusite and kianite. These minerals constitute a mature suite whi.ch are not only from the Amazon river system but also from the Tocantins river system. The clay fraction are represented by kaolinite, montmorilionite, illite and chlorite. These mineralogical composition reveals the influente of the more them one climatic change. The possible sources areas for these minerals are: the Andes Mountains; the upper Amazon and the Tocantins basin from this work we conclude that the methods of sedimentological research presented here with the studies of the morphological patterns in the northern and northeastern regions of Marajó Island can be applied to groundwater prospecting.
Acesso aberto (Open Access)
Estudo sedimentológico dos sedimentos Barreiras, Ipixuna e Itapecuru no nordeste do Pará e noroeste do Maranhão
(Universidade Federal do Pará, 1981-06-24) GÓES, Ana Maria; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Barreiras, Itapecuru and Ipixuna are exposed in large regions of Pará and Maranhão State. The Barreiras sedimente are divided in conglomeratic, sandy clay and sandy lithofacies. Textural imaturity and abundant mud-s.upported clastics in particular, suggest depositions mainly by debris flows under semiarid conditions. The three lithofacies were probably derived from Precambrian schists of Santa Luzia Formation and preexisting sedimente. The Itapecuru sedimenta consist of crossbedded sandstones, locally with minor conglomerates and mudstones, deposited in fluvial environment, probably tending to a semiarid conditions. The Ipixuna facies consiste of crossbedded kaolinitic sandstones, minor mudstones (lithology A) and laminated mudstonefine sandstone units including thick kaoline layers (lithology B). The fine sandstones are texturally and mineralogically mature. Lacustrine-fluvial origin is proposed for Ipixuna facies. The impoverished heavy-mineral assemblage and thick kaoline-layers suggest humid hot climate that probably prevailed before (during?) the Ipixuna sedimentation. Textural and structural characteristics of the sedimente studied show that there is a olear difference between Barreiras Group and Ipixuna facies and that the latter is correlated with the Itapecuru Formation. Bauxitization of lower Tertiary age affected only the Ipixuna and Itapecuru sedimentary rocks.
Acesso aberto (Open Access)
Estudo sedimentológico e geoquímico em sedimentos de fundo na Baía de Guajará-Belém (PA)
(Universidade Federal do Pará, 2007-08-28) SARAIVA, André Luis de Lima; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
During the last years, many Brazilian estuaries located close to great cities have been suffered several environmental alterations caused by the accelerated and disordered growth of these cities. These alterations may occur from heavy metals that reach the water bodies being adsorbed by the sediments. In this context, the bottom sediments play an important role, because they can work as indicators of the level of pollution of these environments, becoming still more relevant when anthropic processes are considered. With the objective to evaluate the degree of contamination of the sediments from the Guajará bay, mainly in areas close to the margin of the Onças, jaraquinha, Mirim and Jutuba islands and also close to the Val de Cans channel, sedimentological, mineralogical and chemical analyses were carried out from bottom surface sediments and cores of about 50 cm depth. The identified sedimentary facies in the cores were sandy mud with thinly evenparallel rhythmitic bedding, sandy mud with cross lamination, sandy mud with longitudinal cross bedding and wavy lamination. These structures, particularly the evenparallel rhythmitic bedding and the longitudinal cross bedding, indicate tidal influence and lateral channel migration, respectively. The grain size results of the analyzed bottom surface sediments showed the dominance of sandy silt and silty sand and only one sample has been classified as sand. The mineralogical study defined the presence of quartz, kaolinite, illite, smectite and heavy minerals which include staurolite, tourmaline, rutile, kyanite, zircon, epidote, amphibole (hornblende) and sillimanite, being the most abundant minerals tourmaline, kyanite, staurolite, zircon and rutile. With the exception of epidote and hornblende which suggest direct provenance (first cycle) from metamorphic/igneous rocks, the other minerals seen to be derived from recycled Barreiras and/or Post-Barreiras sediments. The analyses of organic matter and the chemical analyses of the bottom sediments provided the following average concentrations: Organic matter 1,87±0,84%; heavy metals Pb 33,3±4,9 mg.kg-1; Cr 59,7±8,3 mg.kg-1; Co 10,8±2,2 mg.kg-1; Ni 19,3±4,4 mg.kg-1; Zn 73,7±15,1 mg.kg-1; Cu 18±2,8 mg.kg-1; Mn 489,2±166,5 mg.kg-1 and Fe 3,6± 0,6% The chemical results obtained from three cores are not very different from those of the bottom surface sediments, with the exception of Pb and Zn whose mean values are lower in the cores. How one could expect, a significant correlation has been obtained between the metals and Al which stands for the clay minerals. All the concentrations of the analyzed metallic elements in the bottom sediments of the Guajará are lower than their PEL index which represent the concentration above which adverse effects on biota are expected to occur frequently. In the surface sediments all Cr and some of the Ni and Pb values are higher than the TEL index, which represent the concentration below which adverse effects are expected to occur only rarely, whilst in the cores only the Cr and some Ni values surpass the TEL index. Pb, Cr and Ni of the bottom surface sediments suggest anthropogenic influence, but at present their values do not represent any risk for the estuarine environment.
Acesso aberto (Open Access)
Fáceis litorâneas glaciais da formação Nhamundá (Siluriano inferior), na região de Presidente Figueiredo, AM, Bacia do Amazonas
(Universidade Federal do Pará, 1998-11-29) SOARES, Emílio Alberto Amaral; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Fáceis sedimentares e evolução diagenética dos arenitos da Formação Faro (Eo-Carbonífero) da Bacia do Amazonas
(Universidade Federal do Pará, 1993-01-11) AMADOU, Ba Ibrahim; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Fácies costeiras dos depósitos itapecuru (cretáceo), região de Açailândia, Bacia do Grajaú
(Universidade Federal do Pará, 1999-11-17) ANAISSE JUNIOR, José; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Acesso aberto (Open Access)
Fácies deposicionais, estratigrafia e aspectos estruturais da cobertura sedimentar paleoproterozoica na serra do Tepequém, Escudo das Guianas, Estado de Roraima
(Universidade Federal do Pará, 2010-12-09) FERNANDES FILHO, Lucindo Antunes; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553; 5463384509941553
In the northern South America, occurs the largest continuous exposure of Paleoproterozoic sedimentary deposits related to the Roraima Supergroup, forming the Pacaraima Block with 73,000 km2. This siliciclastic succession of more than 2 km thick is inserted in the Guyana Shield, northern Amazon Craton, extending from in the border of Brazil, Venezuela, Guyana and Suriname. Near of the Pacaraima Block occur isolated mountains with little-known siliciclastic successions of the faciologic and stratigraphic point view, which does not allow a better correlation with the Roraima Supergroup and, consequently, hinders the paleogeographic and paleoenvironmental reconstitution of the Paleoproterozoic in this part of Amazonia. Outcrop-based stratigraphic and facies studies in the Serra do Tepequém and Uiramutã region, State of Roraima, northern Brazil, allowed redefined and redescribed the lower unit of Roraima Supergroup as Arai Group. The Arai Group of approximately 400 m thick overlies acid volcanic rocks of the Surumu Group, is covered by siliciclastic deposits of the Suapi Group and has been subdivided into two formations. The lower one, similar in both areas, generally consists of polymictic conglomerates, cross-bedded sandstones with microplacers of hematite, and subordinate mudstones interpreted as braided stream deposits. In contrast, the upper formation, in the Uiramutã region, is composed of silty fine-grained sandstones with medium-scale trough cross bedding and convolute lamination deposited in a more distal braided stream environment. This unit, in the Serra do Tepequém region, consists of fine to medium-grained cross-bedded sandstones with mudstones, sandstone/mudstone rhythmites and subordinate conglomerates and breccias interpreted as coastal, tide-influenced deposits. The top of the Arai Group is marked by an expressive unconformity covered with diamond-bearing conglomerates and pebbly sandstones of the basal Suapi Group, interpreted as braided stream deposits. This study confirms the previous interpretation of a big braided stream system migrating to southwest in the central part of the Guyana Shield. In addition it could be shown that the fluvial system in its distal part (Serra do Tepequém) was influenced by tidal processes. The stratigraphy of the Arai Group has established the basis for a regional correlation included deposits of isolated occurrences in the Guyana Shield and points to the presence of a large intracratonic Paleoproterozoic basin connected to the open sea. The structural framework of Serra do Tepequém indicates that major sinistral oblique, normal and reverse NE-SW fault zones bound domains whose bedding dips mainly towards SE and NW. Regional scale forced folds are represented by kilometer scale kink bands and chevron folds compatible with upper-to-middle crustal level. These findings differ from previous regional models based on folding under ductile conditions related to collisional tectonics and evidence the importance of Guiana Shield early basement structures, reactivated probably during the K'Mudku event (~ 1.2 Ga).
Acesso aberto (Open Access)
A Formação Palmeiral (Proterozóico Superior) na serra dos Pacaás Novos, oeste de Rondônia
(Universidade Federal do Pará, 1997-03-18) BAHIA, Ruy Benedito Calliari; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
A Serra dos Pacaás Novos, localizada na região oeste do Estado de Rondônia, nas adjacências da cidade de Guajará Mirim, e encaixada na porção ocidental do Cráton Amazônico, é constituída mormente de conglomerados e arenitos da Formação Palmeiral, do Proterozóico Superior. Esta idade é baseada na datação Rb/Sr de rochas vulcânicas básicas intercaladas na base desses depósitos, da parte oriental da serra. A Formação Palmeiral, objeto deste trabalho, foi estudada sob os pontos de vista faciológico e tectono-estrutural. A análise faciológica distinguiu 6 litofácies que incluem: (1) ortoconglomerado maciço ou com estratificação incipiente, como fácies predominante (Gm); (2) arenito com estratificação horizontal (Sh); (3) arenito com estratificação cruzada acanalada (St); (4) arenito com estratificação cruzada tabular (Sp); (5) arenito com estratificação sigmoidal (Sl); e (6) arenito maciço (Sm). A fácies conglomerática, interpretada como barras longitudinais ou lençóis empilhados, gerados durante eventos de alta descarga, contém níveis de lentes arenosas, que representam depósitos formados durante períodos de baixa descarga em canais menores. Esta variação na descarga, aliada com a capacidade transportadora variável do fluxo, e a pouca profundidade do leito sugerida pela estruturação dos lençóis conglomeráticos, aponta para os sedimentos Palmeiral, um estilo fluvial “braided”, semelhante ao tipo “Scott” de MIALL (1977). Entretanto, ficam dúvidas se este padrão relaciona-se a um sistema fluvial proximal ou leque fluvial. Corpos conglomeráticos com fácies comparáveis àquelas da Serra dos Pacaás Novos, encontradas a mais de 100 km a norte da serra mostrando o mesmo padrão de paleocorrente para SW, parecem favorecer a interpretação de um sistema fluvial proximal. A proveniência dos depósitos Palmeiral é indicada pelos diferentes tipos de seus eixos; ocorrem seixos de quartzo, quartzito, arenito e rochas vulcânicas, os quais apenas em parte são oriundos do embasamento cristalino. Contudo, fragmentos de rochas do embasamento mais próximo (Complexo Jamari), que bordeja a serra, não foram encontrados. A Formação Palmeiral passou por vários processos diagenéticos incluindo sobrecrescimento de quartzo, formação de caulinita e ilitização. Podem ocorrer pseudomorfos de ilita a partir de caulinita. A dissolução por pressão é bem documentada por concavidades em seixos da fácies conglomerática. Na Serra dos Pacaás Novos, A Formação Palmeiral está confinada numa estrutura de graben, que possivelmente no Cenozóico sofreu inversão de relevo,, responsável pela atual configuração morfológica da serra. A análise estrutural dessa formação possibilitou a separação de três setores. O setor I, situado no extremo norte da serra, apresenta a forma da cunha, com direção geral NE-SW, caracterizada pelas falhas/fraturas rúpteis-dúcteis verticalizadas. O setor II, com orientação WNW-ESE, ocupa a porção central da serra. Encoberto parcialmente por sedimentos recentes, é constituído por zonas de cisalhamento dúcteis que interligam-se formando amêndoas, verticalizando o acamamento das rochas. O setor III, localizado na parte sul da serra, apresenta duas zonas de cisalhamento dúcteis, na direção E-W, resultando num duplex transcorrente.
Acesso aberto (Open Access)
Litofácies e evolução diagenética dos arenitos da formação Monte Alegre na região do rio Tapajós, Bacia do Amazonas
(Universidade Federal do Pará, 1989-11-23) TORRES, Admilson Moreira; TRUCKENBRODT, Werner Hermann Walter
Acesso aberto (Open Access)
Litofácies e minerais pesados da Formação Alter do Chão (cretáceo), região de Óbidos-PA, parte central da bacia do Amazonas
(Universidade Federal do Pará, 2010-05-05) MENDES, Anderson Conceição; LAFON, Jean Michel; http://lattes.cnpq.br/4507815620234645; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553
Cretaceous deposits exposed in riverbanks of the Amazon River, near the town of Óbidos (state of Pará), record a succession of sandstones, conglomerates and mudstones. Seven lithofacies types including massive conglomerate (Cm), trough cross-bedded sandstone (St), planar cross-bedded sandstone (Sp), cross-laminated sandstone (Sl), massive mudstone (Mm), bioturbated mudstone (Mb) and deformed mudstone (Md) have been recognized that are organized in fining-upward cycles each 1 to 6 m thick. These lithofacies have been arranged in two associations: 1-Channel fill, composed of gravel bars, sandy bedforms and lateral-accretion deposits and, 2- Overbank deposits composed of levee, crevasse splay and floodplain sediments. Cross-bed measurements in the facies St and Sp indicate a general flow system to SW. The facies analysis evidenced that the Alter do Chão formation was deposited in a fluvial meandering system, with sinuosity and mixed-load variation. Petrographic studies classified the sandstones as quartz-sandstones with kaolinitic matrix, the latter being generated by weathering. The quartz-sandstone generally consists of moderately sorted, fine to coarse, angular to subangular, and secondly, subrounded grains. The heavy mineral assemblage has high compositional maturity, with average ZTR index of 85%, represented by zircon, tourmaline, kyanite, rutile, staurolite, monazite and occasionally andalusite and spinel. Conchoidal fractures and impact marks are common to zircon and tourmaline while dissolution features occur in kyanite and staurolite. The quartz grains as well as the heavy mineral originated from igneous and metamorphic rocks. Additionally, embayments and vacuoles in quartz grains suggest volcanic origin for, at least one part of this mineral. The informations from heavy minerals, combined with paleocurrent data and U-Pb ages (Mappes, 2009), suggest as source areas for the Alter do Chão formation near Óbidos, regions located north/northeast of the study area. The Maroni-Itacaiúnas Province characterized by metavolcanic and metasedimentary rocks, as well as gneisses and granites may be considered as the main potential source for the sandstones of the Alter do Chão formation.
Acesso aberto (Open Access)
Petrologia dos carbonatos da formação Itaituba na região de Aveiro - PA
(Universidade Federal do Pará, 1983-12-22) FIGUEIRAS, Alexandre José Martins; TRUCKENBRODT, Werner Hermann Walter; http://lattes.cnpq.br/5463384509941553