Spelling suggestions: "subject:"parní"" "subject:"varna""
1 |
Levantamento do potencial geoturístico do Parque Nacional do Catimbau – como subsídio para criação de um futuro geoparqueSilva Junior, Edvaldo Dias da 31 January 2013 (has links)
Submitted by Felipe Lapenda (felipe.lapenda@ufpe.br) on 2015-03-05T11:52:26Z
No. of bitstreams: 2
Dissertaçao EDVALDO DIAS DA SILVA JUNIOR.pdf: 4318715 bytes, checksum: 31894c5c66ef54e8a3bfb1ed7cd25d79 (MD5)
license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-03-05T11:52:26Z (GMT). No. of bitstreams: 2
Dissertaçao EDVALDO DIAS DA SILVA JUNIOR.pdf: 4318715 bytes, checksum: 31894c5c66ef54e8a3bfb1ed7cd25d79 (MD5)
license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5)
Previous issue date: 2013 / Fundação de Amparo a Ciência e Tecnologia do Estado de Pernambuco / O geoturismo é o segmento turístico voltado para as pessoas que desejam viajar com a intenção de conhecer e aprender mais sobre o patrimônio geológico dos lugares. Como, na maioria das vezes é praticado em áreas naturais, o geoturismo pode ser uma importante ferramenta para o desenvolvimento de ações de preservação do patrimônio natural. Nesse contexto, o Parque Nacional do Catimbau – Parna do Catimbau (PE, Brasil), conta com um importante patrimônio geológico, e pode ser utilizado no desenvolvimento de atividades de geoconservação e interpretação ambiental. Dessa forma, essa pesquisa teve o objetivo de analisar como o levantamento e o mapeamento dos locais de interesse geológico podem ajudar na conservação e divulgação desta riqueza, contribuindo, assim, para a futura criação de um geoparque na região, garantindo a manutenção de parte da história da Terra presente nesse lugar. Para demonstrar todo esse patrimônio foram georreferenciadas as trilhas e localizados os pontos de maior interesse geológico, além de buscar conhecer como as atividades de visitação acontecem no Parque. Para isso foi caracterizada sua demanda e, analisada a atividade desenvolvida pelos condutores locais. A utilização, a tipologia e o interesse presente nestes pontos também foram classificados e analisados. Os resultados demonstraram que o Parna do Catimbau possui grande aptidão para o desenvolvimento de atividades geoturísticas e enorme potencial para sediar um futuro geoparque. Contudo, para a atividade geoturística alcançar um elevado grau de importância no turismo brasileiro, torna-se necessária uma gestão responsável dos recursos, enfatizando a educação e a promoção de hábitos saudáveis que se preocupem com a manutenção do patrimônio natural biótico e abiótico, assegurando para as futuras gerações o conhecimento da história natural e da formação da Terra.
|
2 |
Untersuchungen zum Einfluss exogener und endogener Faktoren auf den Pilocarpingehalt von Pilocarpus microphyllus Stapf ex Wardleworth unter natürlichen BedingungenScheerer, Jochen January 2001 (has links) (PDF)
Mit dieser Arbeit sollten, vor anwendungsbezogenem Hintergrund, die Einflüsse endogener und exogener Faktoren auf den Pilocarpingehalt von P. microphyllus Stapf unter natürlichen Bedingungen untersucht werden. Die Bestimmung der Pilocarpingehalte der entsprechenden Proben erfolgte mit Hilfe von HPLC –Analysen der, zuvor durch Festphasenextraktion aufgereinigten, Pflanzenextrakte. Mit dem Ziel, Pflanzenmaterial gleicher genetischer Herkunft untersuchen zu können, wurde versucht, die Pflanzen über Keimlinge und Sprosstecklinge zu vermehren. Während erstere Versuche zu Keimraten von bis zu mehr als 80 Prozent führten, blieben die Bemühungen einer Stecklingsvermehrung trotz unterschiedlicher Ansätze erfolglos. Im Zusammenhang mit Untersuchungen zum Einfluß endogener Faktoren auf den Pilocarpingehalt in den Blättern, wurden vegetative Merkmale (Blüten, Knospen, Früchte und Blattaustriebe) den jeweiligen Gehalten gegenübergestellt. In einem Zeitraum von zehn Monaten konnten bei keiner der Versuchspflanzen ein Zusammenhang zwischen dem jeweiligen vegetativen Zustand und der Menge an Pilocarpin in den Blättern festgestellt werden. Während der vegetative Zustand von P.microphyllus Stapf keine offensichtlichen Auswirkungen auf den Pilocarpingehalt der Blätter hatte, ergaben die Versuchsreihen zum Blattalter einen deutlichen Einfluß dieses endogenen Faktors. In zahlreichen Analysen konnte gezeigt werden, daß junge Blätter durchschnittlich 70 Prozent mehr Pilocarpin enthalten als alte Blätter der jeweils selben Pflanze. Pilocarpin wurde in unterschiedlichen Konzentrationen in allen Teilen von P. microphyllus Stapf nachgewiesen. In Langzeitbeobachtungen über den Zeitraum eines Jahres, konnten in allen Fällen Schwankungen im Pilocarpingehalt der Blätter beobachtet werden. Bis auf eine Ausnahme verliefen diese Änderungen nach einem ähnlichen Muster, welches sich jedoch nicht mit klimatischen Faktoren in einen logischen Zusammenhang bringen ließ. Als ein exogener Faktor mit deutlichem Einfluß auf den Pilocarpingehalt der Blätter, wurden die Strahlungsverhältnisse identifiziert. Bei vergleichenden Analysen von Versuchspflanzen, welche in einem Schattenbeet wuchsen, mit solchen, die der vollen Sonneneinstrahlung ausgesetzt waren, wurde deutlich, daß die Schattenpflanzen durchschnittlich etwa 37 Prozent mehr Pilocarpin enthielten. In einem Düngungsversuch konnte gezeigt werden, daß sich die Nährstoffversorgung entscheidend auf den Pilocarpingehalt auswirken kann. Nach dreimaliger Zugabe eines Düngers, welcher vor allem die Phosphat- und Kaliumversorgung der Pflanzen verbesserte, wurden Mengen an Pilocarpin gefunden, welche um bis zu knapp 300 Prozent über den Werten vor der Düngung lagen. Experimente mit unterschiedlichen Methoden zur Trocknung von geernteten Pilocarpusblättern ergaben, daß die Art der Trocknung einen entscheidenten Einfluß auf den Gehalt an Pilocarpin in den Blättern nach der Ernte hat. Unter günstigen Lagerbedingungen konnten Pilocarpusblätter für mindestens ein Jahr ohne größere Verluste an Pilocarpin aufbewahrt werden. Im Laufe dieser Arbeit ergaben sich aus den Chromatogramspektren der verschiedenen Analysen Hinweise auf verschiedene, möglicherweise chemische, Varietäten innerhalb der Art P.microphyllus Stapf. / In this dissertation the influence of endogenous and exogenous factors that possibly affect on the content of Pilocarpine in P. microphyllus Stapf under natural conditions has been analyzed. An HPLC method was developed to determine the content of Pilocarpine in respective plant extracts, which had been conditioned previously by solid phase extraction. To obtain genetically identical plant material, attempts were made to propagate plants by seedlings and stem-cuttings. The seedling experiments resulted in germination rates of more than 80 per cent, meanwhile various cutting attempts did not lead to any success. In studies regarding the influence of endogenous factors on the content of Pilocarpine in the leaves, vegetative features (flowers, buds, and fruits) were compared with the respective Pilocarpine contents. During a 10 months observation period no correlation could be determined between the vegetative characteristics and the content of Pilocarpine. Unlike vegetative features, the age of the leaves was determined as an endogenous factor with a significant influence on the Pilocarpine content. In numerous analyses it could be shown that young leaves contain in average 70 per cent more Pilocarpine than old ones of the same plant. Pilocarpine was found in all parts of P. microphyllus Stapf. In observations made during a period of time of one year, fluctuations of the Pilocarpine content in the leaves were found in all cases. Besides one exception, those fluctuations showed a similar pattern. However, no correlation with climatic factors could be found. Radiation conditions were identified as an external factor with significant influence on the Pilocarpine content of the leaves. In analysis comparing leaves of plants growing in full sunlight and those growing under shade, the average content of Pilocarpine of the latter was 37 per cent higher. In an experiment with a fertilizer it could be shown that the nutrient supply has a significant importance on the Pilocarpine content. After a three times application of a fertilizer, which mainly improved the phosphate and potassium supply of the plants, up to 300 per cent more Pilocarpine was found compared with contents before the application. Experiments with different drying techniques of harvested leaves revealed that the applied drying method has a decisive influence on the Pilocarpine content of the leaves. Under suitable conditions it has been possible to store dried Pilocarpus leaves for at least one year without important loss in Pilocarpine. Based on the chromatograms obtained during this dissertation, indications for different, possibly chemical, varieties of the species P.microphyllus Stapf were revealed.
|
3 |
Assinatura estrutural e geof?sica da por??o norte (fronteira Cear?-Piau?) no lineamento transbrasiliano: reativa??o na bacia do Parna?baCacama, Mois?s Samuel Jo?o Bota 25 May 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-31T23:12:19Z
No. of bitstreams: 1
MoisesSamuelJoaoBotaCacama_DISSERT.pdf: 15699529 bytes, checksum: bf8851e1234bc09c6a2f37eb37638d6e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-05T19:22:45Z (GMT) No. of bitstreams: 1
MoisesSamuelJoaoBotaCacama_DISSERT.pdf: 15699529 bytes, checksum: bf8851e1234bc09c6a2f37eb37638d6e (MD5) / Made available in DSpace on 2016-04-05T19:22:45Z (GMT). No. of bitstreams: 1
MoisesSamuelJoaoBotaCacama_DISSERT.pdf: 15699529 bytes, checksum: bf8851e1234bc09c6a2f37eb37638d6e (MD5)
Previous issue date: 2015-05-25 / O Lineamento Transbrasiliano ? uma importante zona de cisalhamento com dire??o NE-SW,
relacionada orog nese Brasiliana e que evoluiu em est?gios de alta at? baixa temperatura. No
presente trabalho, investigou-se a assinatura estrutural e geof?sica da por??o norte do Lineamento
Transbrasiliano (fronteira Cear?-Piau?), envolvendo a zona milon?tica brasiliana, o Graben de
Jaibaras e as reativa??es que afetam as sequ?ncias sedimentares p?s-ordovicianas da Bacia do
Parna?ba. Na literatura ? comum a refer?ncia ? reativa??o fanerozoica dessa estrutura, a qual
teria originado diversos grabens tardi-brasilianos precedentes ? sin?clise paleozoica do Parna?ba,
a exemplo do Graben de Jaibaras. As falhas que seccionam as unidades estratigr?ficas da Bacia
do Parna?ba, ao longo de toda a extens?o do Lineamento Transbrasiliano, exprimem a sua
reativa??o em eventos mais jovens. O mapa do campo magn?tico an?malo reduzido ao polo
exibe anomalias com dire??o NE, interpretadas como a assinatura do Lineamento
Transbrasiliano (e das estruturas brasilianas da Prov?ncia Borborema) na sua express?o de alta
temperatura. O Graben de Jaibaras ? marcado por uma faixa an?mala retil?nea com alta
susceptilidade magn?tica (interpretada como o predom?nio de rochas ferromagnesianas,
provavelmente vulc?nicas), aparentemente sem continuidade expressiva no substrato da Bacia do
Parna?ba. A an?lise geom?trica e cinem?tica das estruturas da ?rea enfocada, utilizando dados de
sensores remotos e de campo, permitiu a caracteriza??o de quatro fases de deforma??o fr?gil a
d?ctil-fr?gil Dn, D1, D2 e D3. A fase deformacional Dn, de idade ediacarana-cambriana, ocorre de
modo exclusivo no Graben de Jaibaras, com desenvolvimento de estruturas de temperatura mais
elevada (comparativamente aos eventos mais jovens), d?cteis-fr?geis. As fases deformacionais
D1, D2 e D3 ocorrem afetando tanto o Graben de Jaibaras como as sequ?ncias paleozoicas da
borda NE da Bacia do Parna?ba, com gera??o de estruturas em temperatura baixa, basicamente
r?pteis/catacl?sticas. A an?lise de imagens SRTM permitiu cartografar diversos lineamentos de
dire??o NE, NW e E-W na Bacia do Parna?ba, cuja correla??o com as estruturas mesosc?picas ?
discutida em termos da reativa??o do Lineamento Transbrasiliano em associa??o com os est?gios
de abertura do Atl?ntico e separa??o Am?rica do Sul-?frica, ou mesmo a eventos orog?nicos
distais no Paleozoico. / The Transbrasiliano Lineament is a major shear zone trending NE-SW, related to the Brasiliano
orogeny and evolved through high to low temperature stages. In this study, the structural and
geophysical signature of the northern segment of Transbrasiliano Lineament was studied in its
northern border, between Cear? and Piau? states, involving the Brasiliano mylonite zone, the
Jaibaras Graben and reactivations affecting the sedimentary sequences post-ordovician of
Parna?ba Basin. In the literature, is commonly the phanerozoic reactivation of this structure
referred, generating several late Brasiliano grabens predating the paleozoic Parna?ba syneclises,
like the Jaibaras Graben. Faults that cut the stratigraphic units of the Parna?ba Basin along the
entire length of the Transbrasiliano Lineament express its reactivation during younger events.
The magnetic anomaly field reduced to the pole map exhibit anomalies NE-trending, interpreted
as the signature of the Transbrasiliano Lineament (and Brasiliano structures of the Borborema
Province) in its high-temperature expression. The Jaibaras Graben is marked by a straight
anomalous track with high magnetic susceptibility (interpreted as a prevalence of ferromagnesian
rocks, probably volcanic), apparently without significant continuity in the substrate of Parna?ba
Basin. The geometric and kinematic analysis of the structures in the study area, using remote
sensing and field data, led to the characterization of four deformation phases brittle the ductilebrittle
Dn, D1, D2 and D3. The Dn deformation phase of ediacaran-cambrian age, occurs
exclusively in the Jaibaras Graben, with the development of comparatively higher temperature
(as regards to younger events) ductile-brittle structures. D1, D2 and D3 deformation phases affect
both the Jaibaras Graben as well as the paleozoic sequences of the northeastern edge of Parna?ba
Basin, generating structures developed at lower temperatures, basically brittle/cataclastic. The
SRTM image analysis allowed mapping different NE, NW and E-W trending lineaments in
Parna?ba Basin, whose correlation with mesoscopic structures is discussed in terms of the
reactivation of Transbrasiliano Lineament in association with the stages of general Atlantic
opening and separation between South America and Africa, or even the distal orogenic events in
Paleozoic.
|
4 |
An?lise estratigr?fica da sequ?ncia siluriana da Bacia do Parna?ba, NE do BrasilCruz, Erlanny Maria Alves 29 February 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-03T19:37:11Z
No. of bitstreams: 1
ErlannyMariaAlvesCruz_DISSERT.pdf: 5371387 bytes, checksum: f052cd71fa335b1d2bd2f6844d109e49 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-05T20:21:52Z (GMT) No. of bitstreams: 1
ErlannyMariaAlvesCruz_DISSERT.pdf: 5371387 bytes, checksum: f052cd71fa335b1d2bd2f6844d109e49 (MD5) / Made available in DSpace on 2017-01-05T20:21:52Z (GMT). No. of bitstreams: 1
ErlannyMariaAlvesCruz_DISSERT.pdf: 5371387 bytes, checksum: f052cd71fa335b1d2bd2f6844d109e49 (MD5)
Previous issue date: 2016-02-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Esta Disserta??o de Mestrado compreende a an?lise estratigr?fica da Sequ?ncia Siluriana da Bacia do Parna?ba e est? vinculado ao Projeto de Pesquisa "Geologia e Sistemas Petrol?feros da Bacia Intracrat?nica do Parna?ba" financiado pela Chevron Brasil e UFRN/PPGG/FUNPEC. A Bacia do Parna?ba ? uma sin?clise paleozoica com ?rea de, aproximadamente, 600 mil km2 que situa-se no nordeste brasileiro e engloba parte dos estados do Maranh?o, Piau?, Tocantins, Par?, Cear? e Bahia.
A an?lise estratigr?fica efetuada neste estudo foi dividida em duas etapas denominadas an?lise 1D e an?lise 2D. Na an?lise 1D foram utilizados dados de po?os, tais como, perfis de raios gama e litol?gicos, os quais possibilitaram o reconhecimento das unidades gen?ticas e superf?cies cronoestratigr?ficas da estratigrafia de sequ?ncias. Por sua vez, a an?lise 2D baseou-se na interpreta??o s?smica, a qual, aliada ? an?lise 1D permitiu a demarca??o das superf?cies estratigr?ficas e o entendimento do comportamento bidimensional das unidades gen?ticas identificadas. Nesta etapa tamb?m foi confeccionada uma se??o estratigr?fica com dire??o aproximada NW-SE que possibilitou um melhor entendimento sobre a hist?ria de sedimenta??o da se??o estudada. / This review presents a stratigraphic analysis of the Silurian Sequence of Parna?ba Basin and is related to the ?Geology and Petroleum Systems of the Parna?ba Intracratonic Basin? Research Project, funded by Chevron Brasil and UFRN/PPGG/FUNPEC. The Parna?ba Basin is a paleozoic sineclisis which encompasses an area of approximately 600,000 km? and is located in the Northeastern Region of Brazil, distributed throughout the states of Maranh?o, Piau?, Tocantins, Par?, Cear? e Bahia. The stratigraphic analysis implemented in this study was divided into two stages, referred to 1D and 2D analysis. In the 1D analysis well log data were used, such as gama ray and lithologic profiles, which provided the recognition of the genetic units and chronostratigraphic surfaces of sequence stratigraphy. On the other hand, the 2D analysis was based on the seismic interpretation, which along with the 1D analysis allowed the delimitation of the stratigraphic surfaces and the understanding of the bidimensional behavior of the genetic units identified .At this stage, a stratigraphic section with NW-SE direction, approximately, was created as well, providing a better understanding about the sedimentary evolution of the studied section.
|
5 |
An?lise estrutural do Sistema de Grabens do Rio Tocantins, borda oeste da Bacia do Parna?ba (Tocantins, Par? e Maranh?o)Souza, Kau? Seoane 08 June 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-03T19:37:12Z
No. of bitstreams: 1
KaueSeoaneSouza_DISSERT.pdf: 7922270 bytes, checksum: 3448befee9f575a57b4d9a011df2972a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-05T20:39:30Z (GMT) No. of bitstreams: 1
KaueSeoaneSouza_DISSERT.pdf: 7922270 bytes, checksum: 3448befee9f575a57b4d9a011df2972a (MD5) / Made available in DSpace on 2017-01-05T20:39:30Z (GMT). No. of bitstreams: 1
KaueSeoaneSouza_DISSERT.pdf: 7922270 bytes, checksum: 3448befee9f575a57b4d9a011df2972a (MD5)
Previous issue date: 2016-06-08 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A borda oeste da Bacia do Parna?ba apresenta um marcante sistema de fotolineamentos N-S, imediatamente a leste do contato com o embasamento. A distribui??o das unidades litoestratigr?ficas nesta regi?o segue essa orienta??o N-S, diferindo do padr?o de faixa aflorante ovalada da bacia. Esse padr?o N-S corresponde a um sistema de grabens j? abordado nas cartas geol?gicas da CPRM, composto por um graben principal, no interior da bacia, e outro secund?rio, encravado no embasamento cristalino. Nas bordas do graben principal, as faixas aflorantes das forma??es Motuca e Samba?ba s?o balizadas por falhas normais ou normais obl?quas sinistrais, que ocasionam a omiss?o de unidades estratigr?ficas sotopostas. Mais a sul, na regi?o de Palmas-Miracema do Tocantins, o Grupo Serra Grande, a Forma??o Pimenteiras e o embasamento cristalino est?o em contato por falhas normais. O outro graben, localizado a oeste do principal, tamb?m acomoda a Forma??o Motuca e possui a mesma orienta??o. A an?lise de imagens SRTM auxiliou na cartografia dos fotolineamentos e dos limites dos grabens. A orienta??o N-S das falhas envolve uma varia??o de 20?-30? para E ou W, que ? controlada pelas anisotropias do embasamento cristalino nesta borda da bacia, relacionado ? Faixa Araguaia. Falhas de regime normal e normal sinistral evidenciam a uma distens?o NE durante a forma??o do graben. A idade m?nima para a forma??o do graben ? estimada no intervalo Permo-Tri?ssico, baseada nas rela??es estruturais e nas unidades litoestratigr?ficas afetadas por esses eventos. Na regi?o norte do mesmo, fotolineamentos E-W/ENE controlam as ocorr?ncias de basaltos e diab?sios eojur?ssicos da Su?te Mosquito, que interceptam as estruturas do graben principal. A distens?o N/NNW na Su?te Mosquito, e falhas normais ou transcorrentes ainda mais jovens, acomodando distens?o NW, s?o tentativamente correlacionadas aos eventos de abertura do Atl?ntico Central e Sul, respectivamente. / The west border of the Parna?ba Basin displays an outstanding N-S photolineaments pattern. The N-S orientation differs from the oval basin. This N-S pattern corresponds to a graben system, previously identified in CPRM geologic maps, including an eastern main graben inside the basin as well as a western structure isolated in the crystalline basement. Along the borders of the main graben, outcrops of young units (f.e. Motuca and Samba?da formations) are in contact with older units through normal and normal-oblique faults, with omission of stratigraphic sections. Inside of the basin, further south (Palmas and Miracema do Tocantins region), the Serra Grande Group, the Pimenteiras Formation and the crystalline basement appear side-by-side uplifted through normal faults. The other graben, in west of the main graben, also accommodates the Motuca Formation and have the same orientation the main graben. The analysis of SRTM images allowed mapping the photolineaments and the graben borders, beyond cutting relationships present in different photolineaments directions. Starting with geometry and kinematic of structures and the orbital image data, could be suggested three deformational events, D1, D2 e D3. The deformational event D1, it is the pioneer of grabens and responsible for your genesis and structuration, the N-S faults orientation of this event involves a 20? to 30? variation to E or W, which is controlled by basement anisotropies along this basin edge, related to the Araguaia Belt. The deformational event D2, is recognized mainly in north region of main graben, where EW/ENE photolineaments control the eojurassic basalts occurrence Suite Mosquito and intersects the structures of previous event. And the deformational event D3 show normal faults NE direction and strike-slip faults dextral and sinistral. Normal and normal sinistral faults, dominate the graben structuration and control your opening with NE distension. The minimum age for this is estimated in the Permo-Triassic interval, based on structural relations and the mentioned stratigraphic units. The E-W eojurassic distension structures of D2 on Suite Mosquito, and normal faults or strike-slip showing NW distension, are much young and tentatively correlated to the event of Atlantic Central and South opening, respectively.
|
6 |
Interpreta??o de lineamentos estruturais na borda sudeste da Bacia do Parna?baLima, Francisco Gabriel Ferreira de 09 August 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-20T22:47:57Z
No. of bitstreams: 1
FranciscoGabrielFerreiraDeLima_DISSERT.pdf: 19778017 bytes, checksum: b8c1ba53855ac471fdec87a2233bb799 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-24T21:42:15Z (GMT) No. of bitstreams: 1
FranciscoGabrielFerreiraDeLima_DISSERT.pdf: 19778017 bytes, checksum: b8c1ba53855ac471fdec87a2233bb799 (MD5) / Made available in DSpace on 2017-02-24T21:42:15Z (GMT). No. of bitstreams: 1
FranciscoGabrielFerreiraDeLima_DISSERT.pdf: 19778017 bytes, checksum: b8c1ba53855ac471fdec87a2233bb799 (MD5)
Previous issue date: 2016-08-09 / A borda sudeste da Bacia do Parna?ba (BPar), regi?o fronteiri?a aos estados do Piau?, Bahia e
Pernambuco, ? marcada por uma expressiva orienta??o NE-SW, paralela ? do Lineamento
Transbrasiliano, bem como pelo estreitamento das faixas aflorantes das forma??es silurodevonianas,
em compara??o ao observado na borda leste da bacia do Parna?ba (BPar). A evid?ncia
de controle estrutural nessa borda da bacia foi analisada com a interpreta??o de imagens de relevo
sombreado, geradas a partir de imagens de radar. Foram destacados os fotolineamentos com
dire??o preferencial NE-SW no embasamento cristalino e na cobertura sedimentar, bem como na
regi?o de contato entre esses dom?nios. Foi realizada uma an?lise integrada das estruturas
observadas em macroescala (imagens de radar e multiespectrais) e em campo (mesoescala),
resultando na caracteriza??o de tr?s eventos deformacionais, com base em crit?rios de orienta??o,
cinem?tica e cronologia relativa. As estruturas da deforma??o Dn foram reconhecidas no
embasamento cristalino e nas sequ?ncias mol?ssicas das bacias de Ara?? e S?o Juli?o, sendo
correlacionadas ao contexto do Grupo Jaibaras, no NW do Cear?, com idade ediacaranacambriana.
Esse evento deformacional est? associado a uma etapa tardia, retrometam?rfica e de
car?ter pl?stico-fr?gil, das zonas milon?ticas brasilianas. A assinatura do mesmo inclui zonas de
cisalhamento dextrais orientadas NE-SW, e veios ?cidos preenchendo bandas C dilatacionais e
juntas de distens?o E-W. A deforma??o Dn+1 corresponde a uma nova etapa de movimenta??o
dextral em estruturas NE-SW, acompanhada por falhas normais e juntas de distens?o com
orienta??o WNW a E-W, essencialmente de car?ter fr?gil e tamb?m afetando as unidades silurodevonianas.
A deforma??o Dn+2 ? caracterizada por falhas normais, diques b?sicos
(correlacionados ? Suite Sardinha, eocret?cea), veios silicosos (preenchendo descontinuidades nas
rochas), todos com orienta??o NE-SW. As falhas NE-SW podem ocorrer no contato entre o
embasamento e a cobertura sedimentar ou j? no interior da bacia. Esse evento ? resultado de uma
distens?o com orienta??o NW-SE, an?loga ?quela reconhecida mais a leste, nas Bacias Interiores
do Nordeste do Brasil, associada ao rifteamento do Atl?ntico Sul. / The southeast border of the Parna?ba Basin (BPar), which follows the borders between the Piau?,
Bahia and Pernambuco states, is characterized by an expressive NE trend parallel to the one of the
Transbrasiliano Lineament, as well as a narrowing of the outcropping belt of the Silurian-Devonian
formations, as compared to the situation in the east basin border. The evidence of a structural
control in this basin border was analysed interpreting hillshade images obtained from radar
imagery. NE-trending photolineaments were highlighted in the crystalline basement and in the
sedimentary cover, as well as in the contact zone between these domains. An integrated analysis
of macroscale (radar and multispectral images) and mesoscale (outcrop data) structures, lead to
the characterization of three deformation events on the basis of their orientation, kinematics and
chronology. Dn structures were recognized in the crystalline basement and molassic sequences of
Ara?? and S?o Juli?o basins, being correlated to same context of the Jaibaras Group, in NW Cear?,
of Ediacaran-Cambrian age. This deformation event is related to a retrometamorphic, plasticbrittle
late stage of Brasiliano mylonite zones. Its signature includes NE-trending dextral
transcurrent shear zones, as well as acid veins filling dilational C bands and E-W extension joints.
Dn+1 deformation corresponds to a new stage of dextral movement along the NE-trending
structures, accompanied by normal faults and extension joints oriented WNW to E-W, in this case
overprinting the Silurian-Devonian formations. Dn+2 deformation is characterized by normal faults,
basic dykes (correlated to the Eocretaceous Sardinha Suite) and siliceous veins (filling anisotropy
in rocks), all of them following a NE-SW trend. The NE-trending faults may occur in the contact
between basement and the sedimentary cover, or inside the basin. This event resulted from a NWSE
extension, analogous to the one recognized further east in the Northeast Brazil Interior Basins,
associated to the South Atlantic rifting.
|
7 |
Express?o estrutural do lineamento transbrasiliano na por??o sul da Bacia do Parna?baSantos, Carla Hemillay de Oliveira 20 March 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T21:22:08Z
No. of bitstreams: 1
CarlaHemillayDeOliveiraSantos_DISSERT.pdf: 16950833 bytes, checksum: 39022e846c49b3e773761c0174767be0 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-06T22:54:54Z (GMT) No. of bitstreams: 1
CarlaHemillayDeOliveiraSantos_DISSERT.pdf: 16950833 bytes, checksum: 39022e846c49b3e773761c0174767be0 (MD5) / Made available in DSpace on 2017-06-06T22:54:54Z (GMT). No. of bitstreams: 1
CarlaHemillayDeOliveiraSantos_DISSERT.pdf: 16950833 bytes, checksum: 39022e846c49b3e773761c0174767be0 (MD5)
Previous issue date: 2017-03-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O Lineamento Transbrasiliano (LTB) apresenta dire??o NE-SW e extens?o de mais de 2.700km em territ?rio brasileiro. Cerca de 900km do LTB ocorrem no substrato pr?-cambriano da Bacia do Parna?ba (BPar), inferido a partir de dados geol?gicos e geof?sicos como uma zona de cisalhamento pl?stica com cinem?tica transcorrente dextral, fei??o corroborada nas exposi??es do embasamento cristalino no NW do Cear? e leste do Tocantins. Na bacia propriamente dita, a reativa??o do LTB se expressa em superf?cie como feixes de lineamentos NE que correspondem a falhas ou fraturas, interceptando as unidades paleozoicas a tri?ssicas da BPar. Este trabalho aborda a assinatura estrutural e idade de reativa??es do LTB na regi?o sul da bacia, a leste de Palmas (regi?o fronteiri?a entre os estados do Tocantins, Maranh?o e Piaui). No embasamento cristalino, a cinem?tica dextral do LTB envolve um est?gio tardio com cinem?tica tamb?m dextral de baixa temperatura (d?ctil-fr?gil), com prov?vel idade ediacarana-cambriana, como observado no NW do Cear?. Nas unidades litoestratigr?ficas da BPar, s?o distinguidos eventos de reativa??o em regime fr?gil ou hidropl?stico (fraturas e bandas de deforma??o). Nesta regi?o de estudo, um evento mais antigo registra uma cinem?tica transcorrente sinistral expressa principalmente como bandas de deforma??o e falhas de escala meso a macrosc?pica, com dire??o NE, combinadas com estruturas obl?quas, dilatacionais (incluindo juntas e falhas normais) ou conjugadas/antit?ticas de rejeito direcional ou obl?quo, com orienta??es que variam de NNE a NNW, observadas nos litotipos das forma??es Samba?ba, Pedra de Fogo e mais antigas. A SE de Alto Parna?ba (MA), s?o destacadas as estruturas em flor que envolvem fei??es de espessamento de camadas na Forma??o Pedra de Fogo, atestando atividade tect?nica sindeposicional durante o Neopermiano. Um segundo conjunto de estruturas s?o falhas normais associadas a uma distens?o N/NNE, impressas nos corpos b?sicos de idade eojur?ssica da Su?te Mosquito, e unidades mais antigas. Essa su?te magm?tica ? capeada, a sul de Lizarda (TO), por arenitos e conglomerados com seixos das vulc?nicas, correlacionados ? Forma??o Corda. Um terceiro conjunto de estruturas, caracterizado por falhas normais ou normais obl?quas com dire??o NE, registra distens?o NW tamb?m observada na borda leste/SE da BPar, sendo associada ao evento de rifteamento da Margem Leste brasileira, durante o Eocret?ceo. Essas reativa??es do LTB n?o afetam o Grupo Urucuia, uma unidade da Bacia do Espig?o Mestre que ocorre na regi?o do Jalap?o. Finalmente, um quarto evento, de ocorr?ncia mais restrita, reflete distens?o NE e est? tamb?m registrado em arenitos correlacionados ao Grupo Urucuia, implicando para ambos uma idade m?xima neocret?cea. / The Transbrasiliano lineament (LTB) is a NE-SW trending shear zone, with length of over 2700km in the brazilian territory. About 900km of the LTB occur in the precambrian basement of the Parna?ba Basin (BPar), inferred as a plastic shear zone with dextral strike-slip kinematics, on the basis of geological and geophysical data, as well as field observations in NW of Cear? and eastern Tocantins states. In the basin itself, reactivation of the LTB is expressed at the surface by NE-trending lineaments which correspond to faults or fractures intercepting paleozoic to triassic units of BPar. This dissertation addresses the structural signature and age of reactivations of the LTB in the southern region of the basin, east of Palmas (border region between Tocantins, Maranh?o and Piaui states). In the crystalline basement, the dextral kinematics of LTB also displays a late, low temperature stage, probabbly of Ediacaran-Cambrian age, like observed at Northwest Cear? state. In the BPar lithostratigraphic units, reactivation events under brittle or hydroplastic conditions are recognized. In the studied region, an older event displays a sinistral transcurrent kinematics expressed as NE-trending deformation bands and faults of meso to macroscale, combined with oblique slip structures, either dilatational (including joints and normal faults) or conjugate/antithetic strike-slip or oblique slip-structures. Their orientations range from NNE to NNW, being observed in the Samba?ba, Pedra de Fogo and older formations. SE of Alto Parna?ba (Maranh?o State), remarkable flower structures controling strata-thickening in Pedra de Fogo Formation attest syndepositional tectonic activity during the Neopermian. A second set of structures are extensional joints or oblique slip and normal faults associated with a N/NNE extension, overprinted in the eojurassic basic rocks of the Mosquito Suite and older units. Volcanogenic sandstones correlated to the Corda Formation overly basic sills south of Lizarda. A third set of structures, characterized by NE-trending normal or normal-oblique slip faults reflect a NW extension also observed along the eastern border of BPar, being correlated to the rifting event in the Brazilian Eastern Margin during the Eocretaceous. Finally, a fourth event, with more restrict occurrence, involves NE extension, being also observed in the Urucuia Group sandstones, sugesting a Neocretaceous age for both.
|
8 |
As pol?ticas p?blicas de turismo e a popula??o local: da concep??o ? implementa??o (Parna?ba-PI)Rocha, Andr?ia Magalh?es da 06 April 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T22:22:04Z
No. of bitstreams: 1
AndreiaMagalhaesDaRocha_DISSERT.pdf: 1948393 bytes, checksum: cf76102f16c98d725f2e5db88eb53572 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-08T21:13:26Z (GMT) No. of bitstreams: 1
AndreiaMagalhaesDaRocha_DISSERT.pdf: 1948393 bytes, checksum: cf76102f16c98d725f2e5db88eb53572 (MD5) / Made available in DSpace on 2017-06-08T21:13:26Z (GMT). No. of bitstreams: 1
AndreiaMagalhaesDaRocha_DISSERT.pdf: 1948393 bytes, checksum: cf76102f16c98d725f2e5db88eb53572 (MD5)
Previous issue date: 2017-04-06 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A promulga??o da Constitui??o Brasileira promoveu diversas mudan?as no Brasil, dentre as quais se destacam a gest?o p?blica descentralizada que foi favorecida com a Carta Magna. No turismo, essa caracter?stica passou a fazer parte das diretrizes do processo de concep??o e implementa??o das a??es p?blicas para o segmento. Neste contexto, a popula??o local passou a ser entendida como um recurso de estimado valor no planejamento e estrutura??o de um destino tur?stico. O presente estudo tem como objetivo central analisar como a popula??o tem sido inserida na concep??o e implementa??o das a??es empreendidas pela gest?o p?blica de turismo em Parna?ba- PI. A metodologia empregada na an?lise consiste em abordagem qualitativa, sendo de natureza explorat?ria. Para tanto, foi desenvolvida al?m da pesquisa bibliogr?fica e documental, pesquisa de campo junto aos moradores de Parna?ba, superintendente, equipe da Superintend?ncia Municipal de Turismo e membros do Conselho Municipal de Turismo. Como aspectos conclusivos, o estudo aponta que n?o se pode afirmar que a popula??o local se insere efetivamente nas a??es p?blicas espec?ficas de turismo em Parna?ba. Tampouco se pode afirmar que h? compatibilidade entre o discurso oficial e a pr?tica. Percebe-se que a relev?ncia atribu?da ? popula??o local no contexto das pol?ticas p?blicas definidas para o turismo brasileiro n?o sofreu mudan?as significativas ao longo dos anos, apenas surgem no discurso oficial dando ?nfase ao papel destes e sua complementaridade na atividade tur?stica. Entende-se que as a??es em conjunto, auxiliaram a execu??o de diferentes a??es na localidade que se repercutiram junto ? popula??o local. / The promulgation of the Brazilian Constitution promoted several changes in Brazil, among them it?s highlighted the decentralized public management which was favored by the Magna Carta. In tourism, this characteristic became part of the guidelines of the conception and implementation process of public actions on this segment. In this context, the local population has come to be understood as a valuable resource in the planning and structuring of a tourism destination. The main objective of this present study is to analyze how the population has been inserted in the conception and implementation of the actions undertaken by the tourism public management in Parna?ba-PI. The methodology used in the analysis consists of a qualitative approach and an exploratory investigation. For that, besides the bibliographical and documentary research, it was developed a field research with the residents of Parna?ba, superintendent and the team of the Municipal Superintendence of Tourism. As conclusive aspects, the study points out that it cannot be affirmed that the local population is effectively inserted in the specific tourism public actions in Parna?ba. Neither be said that there is compatibility between official discourse. It is noticed that the relevance attributed to the local population in the context of the public policies defined for the Brazilian tourism hasn?t passed by significant changes over the years, only appears in the official discourse with emphasis to role of these and your complementarity in tourist activity. It is understood that the actions together, helped to carry out different actions in the location that reverberated on to the local population.
|
9 |
Sistemas orbitais e a?reos aplicados ? an?lise multi-escala da tect?nica r?ptil atuante na borda sudeste da Bacia do Parna?baJusto, Ana Paula 25 August 2006 (has links)
Made available in DSpace on 2015-03-13T17:08:39Z (GMT). No. of bitstreams: 1
AnaPJ_ate_cap4.pdf: 5254385 bytes, checksum: 3ac040e5f9ad13d1d9fc82f32f2f0abf (MD5)
Previous issue date: 2006-08-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The tectonics activity on the southern border of Parna?ba Basin resulted in a wide range of brittle structures that affect siliciclastic sedimentary rocks. This tectonic activity and related faults, joints, and folds are poorly known.
The main aims of this study were (1) to identify lineaments using several remotesensing systems, (2) to check how the interpretation based on these systems at several scales influence the identification of lineaments, and (3) to contribute to the knowledge of brittle tectonics in the southern border of the Parna?ba Basin. The integration of orbital and aerial systems allowed a multi-scale identification, classification, and quantification of lineaments. Maps of lineaments were elaborated in the following scales: 1:200,000 (SRTM Shuttle Radar Topographic Mission), 1:50,000 (Landsat 7 ETM+ satellite), 1:10,000 (aerial photographs) and 1:5,000 (Quickbird satellite). The classification of the features with structural significance allowed the determination of four structural sets: NW, NS, NE, and EW. They were usually identified in all remote-sensing systems. The NE-trending set was not easily identified in aerial photographs but was better visualized on images of medium-resolution systems (SRTM and Landsat 7 ETM+). The same behavior characterizes the NW-trending. The NS-and EW-trending sets were better identified on images from high-resolution systems (aerial photographs and Quickbird). The structural meaning of the lineaments was established after field work. The NEtrending set is associated with normal and strike-slip faults, including deformation bands. These are the oldest structures identified in the region and are related to the reactivation of Precambrian basement structures from the Transbrazilian Lineament. The NW-trending set represents strike-slip and subordinated normal faults. The high dispersion of this set suggests a more recent origin than the previous structures. The NW-trending set may be related to the Picos-Santa In?s Lineament. The NS-and EW-trending sets correspond to large joints (100 m 5 km long). The truncation relationships between these joint sets indicate that the EW-is older than the NS-trending set.
The methodology developed by the present work is an excellent tool for the understanding of the regional and local tectonic structures in the Parna?ba basin. It helps the choice of the best remote-sensing system to identify brittle features in a poorly known sedimentary basin / A atividade tect?nica atuante na borda sudeste da Bacia do Parna?ba resultou em ampla gama de estruturas r?pteis que afetaram rochas sedimentares silicicl?sticas. Esta atividade tect?nica e as falhas, juntas e dobras s?o pouco conhecidas.
Os principais objetivos deste estudo foram (1) identificar lineamentos atrav?s de sistemas de sensores remotos, (2) checar como a interpreta??o com base nestes sistemas em diversas escalas influencia a identifica??o de lineamentos, e (3) contribuir para o conhecimento da tect?nica r?ptil na borda sudeste da Bacia do Parna?ba. A integra??o de sistemas orbitais e a?reos permitiu a identifica??o, classifica??o e quantifica??o multi-escala de lineamentos. Mapas de lineamentos foram elaborados nas seguintes escalas: 1:200.000 (radar da SRTM Shuttle Radar Topographic Mission), 1:50.000 (sat?lite Landsat 7 ETM+), 1:10.000 (fotografias a?reas) e 1:5.000 (sat?lite Quickbird). A classifica??o das fei??es com significado estrutural possibilitou a determina??o de quatro conjuntos estruturais: NW, NS, NE, e EW. Eles geralmente foram identificados em todos os sistemas de sensores remotos. O conjunto NE n?o foi facilmente identificado nas fotografias a?reas. Este conjunto, bem como o NW, foram visualizados mais nitidamente nas imagens dos sistemas de m?dia resolu??o (SRTM e Landsat 7 ETM+). Os conjuntos NS e EW foram melhores identificados nos produtos de sensores de alta resolu??o (fotografias a?reas e sat?lite Quickbird).
O significado estrutural dos lineamentos foi estabelecido ap?s o trabalho de campo. O conjunto NE est? associado a falhas normais e transcorrentes, inclusive bandas de deforma??o. Estas s?o as estruturas mais antigas identificadas na regi?o e s?o relacionadas ? reativa??o de estruturas do embasamento Pr?-Cambriano. O conjunto NW representa falhas trancorrentes e normais subordinadas. A dispers?o deste conjunto sugere uma origem mais recente que as estruturas inseridas no conjunto NE. O conjunto NW pode estar relacionado ao Lineamento Picos-Santa In?s. Os conjuntos NS e EW correspondem a juntas de grande porte (comprimentos de 100 m a 5 km). As rela??es de truncamento entre estes conjuntos de juntas indicam que o conjunto EW ? mais antigo que o NS. A metodologia desenvolvida pelo presente trabalho ? uma ferramenta excelente para o entendimento das estruturas regionais e locais na Bacia do Parna?ba. Isto auxilia na escolha do sistema de sensor remoto mais indicado para identificar fei??es r?pteis em uma bacia sedimentar pouco conhecida
|
10 |
An?lise estratigr?fica da sequ?ncia mesodevoniana-eocarbon?fera da Bacia do Parna?ba, nordeste do BrasilFerraz, Nadja Cruz 20 August 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:29Z
No. of bitstreams: 1
NadjaCruzFerraz_DISSERT.pdf: 13420036 bytes, checksum: 48407aa7c5a58850e36ef79776b6b80c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-29T20:32:49Z (GMT) No. of bitstreams: 1
NadjaCruzFerraz_DISSERT.pdf: 13420036 bytes, checksum: 48407aa7c5a58850e36ef79776b6b80c (MD5) / Made available in DSpace on 2016-07-29T20:32:49Z (GMT). No. of bitstreams: 1
NadjaCruzFerraz_DISSERT.pdf: 13420036 bytes, checksum: 48407aa7c5a58850e36ef79776b6b80c (MD5)
Previous issue date: 2015-08-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A Sequ?ncia Mesodevoniana-Eocarbon?fera da Bacia do Parna?ba, litoestratigraficamente definida como Grupo Canind?, foi reinterpretada empregando-se o modelo b?sico da estratigrafia de sequ?ncias. Para tanto, foram analisados perfis litol?gicos e de raios gama de po?os e linhas s?smicas da regi?o central da bacia, elaborando-se a partir da? diagramas 1D, mapas de is?coras e uma se??o estratigr?fica.
Como resultados deste trabalho, foram definidos dois ciclos deposicionais de segunda ordem, referidos como Sequ?ncia Deposicional 1 (SEQ1) e Sequ?ncia Deposicional 2 (SEQ2). A SEQ1, com cerca de 37 Ma, ? limitada abaixo pela Discord?ncia Eodevoniana e equivale ?s forma??es Itaim, Pimenteiras e Cabe?as.
A SEQ1 se inicia com o Trato de Sistemas de N?vel Baixo, constitu?do por conjuntos de parassequ?ncias progradacionais em que a parte basal, predominantemente pel?tica, depositou-se em um contexto de prodelta sob influ?ncia de tempestades e a superior ? composta por arenitos de frente deltaica, tendo como limite superior a superf?cie regressiva m?xima. O Trato de Sistemas Transgressivo, depositado acima, ? caracterizado por conjuntos de parassequ?ncias retrogradacionais, compostos predominantemente por pelitos de plataforma rasa, depositados sob a??o de tempestades. A superf?cie transgressiva m?xima, limite superior deste trato, ? posicionada em um n?vel de folhelho cuja radiatividade no perfil de raios gama ? pr?xima a 150 API. O Trato de Sistemas de N?vel Alto apresenta conjuntos de parassequ?ncias progradacionais, compostos por pelitos e arenitos depositados em ambientes plataformal, fl?vio-estuarino e periglacial, tendo como limite superior a Discord?ncia Neodevoniana.
A SEQ2, que se segue, compreende um intervalo de cerca de 15 Ma e equivale ? Forma??o Long?. A mesma foi depositada em ambiente plataformal, iniciando com o Trato de Sistemas de N?vel Baixo, caracterizado por um conjunto de parassequ?ncias progradacional, seguido do Trato de Sistemas Transgressivo, de car?ter retrogradacional. O limite superior deste trato corresponde ? superf?cie transgressiva m?xima ou ainda, a fus?o desta superf?cie com o limite de sequ?ncia, que constitui a Discord?ncia Eocarbon?fera, onde a se??o sobreposta foi erodida. Tal se??o, que corresponde ao Trato de Sistemas de N?vel Alto, ? restrita ?s por??es em que a eros?o que originou a Discord?ncia Eocarbon?fera foi menos efetiva, preservando os registros desta unidade. / The Middle Devonian-Early Carboniferous sequence of the Parna?ba Basin, lithostratigraphically
defined as Canind? Group, has been reinterpreted using the basic model of sequence stratigraphy.
Therefore, lithology and gamma ray well-logs and seismic lines of central portion of the basin
were analyzed, producing up from there diagrams 1D, isochore maps and stratigraphic sections.
As results of this study, were defined two depositional cycles of second order, referred as
Depositional Sequence 1 (SEQ1) and the Depositional Sequence 2 (SEQ2). The SEQ1, with interval
about 37 Ma, is limited below by Early Devonian Unconformity and is equivalent to the formations
Itaim, Pimenteiras and Cabe?as. The SEQ2, which follows, comprises a range of about 15 Ma and is
equivalent to the Long? Formation
The SEQ1 starts with the lowstand systems tract, consisting of progradational parasequence
set in the basal part, predominantly pelitic, deposited on a prodelta under influence of storms and the
upper part consists in sandstones of deltaic front, with the maximum regressive surface on the upper
limit. The transgressive systems tract, deposited above, is characterized by retrogradacional parasequence
set composed of shallow shelf mudstones, deposited under storm conditions. The maximum
flooding surface, upper limit of this tract, is positioned in a shale level whose radioactivity in gammaray
well-log is close to 150 API. The highstand systems tract presents progradational parasequence
set, comprising mudstones and sandstones deposited in shelf, fluvial-estuarine or deltaic and periglacial
environments, with the upper limit the Late Devonian Unconformity. The SEQ2 was deposited in shelf environment, starting with the lowstand systems tract, that is characterized by a progradational parasequence set, followed by the transgressive systems tract, with retrogradational character. The upper limit of the tract corresponding to the fusion between maximum flooding surface with the upper limit of this sequence, which is the Early Carboniferous Unconformity, where the overlapping section was eroded. This section, which corresponds the highstand systems tract is restricted to portions at which the erosion that generate the Early-Carboniferous Unconformity was less effective, preserving the records of this unit.
|
Page generated in 0.0466 seconds