Academic literature on the topic 'Marine to continental transition'

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Journal articles on the topic "Marine to continental transition"

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Liu, Chao, Hai Tao Xue, Shuang Wang, and Yu Jiao Sun. "Study on Law of Structural Evolution and Sedimentary Evolution for North Uskyurt Basin." Advanced Materials Research 671-674 (March 2013): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.302.

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North Uskyurt Basin, located on Turan Plain, northwestern Central Asian, is continental polycyclic cratonic. The structural evolution of the basin underwent six phases: basement formulation, passive edge, rifting, post-rifting, compression, early Neogene depression. Regional structural evolution takes control of complicated transition of North Uskyurt sedimentary structure. In general, basin sedimentary environment underwent basement (granite, metamorphic rocks) passive edge, late Devonian epoch carboniferous period (marine facies) rifting, late Permian epoch-triassic period (continental facies) post-rifting, Jurassic period-Cretaceous period (Marine-continental Transition Facies, marine facies) compression, late Eocene-Miocene epoch (marine-continental facies coexistence) Neogene depression, Pliocene-Holocene (continental facies). Consequently, sedimentary formation in which various sedimentary environment, such as marine facies, continental facies, are coexisted with various rock types, such as clastic rocks, carbonate rocks, is generated.
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Bera, M. K., A. Sarkar, P. P. Chakraborty, R. S. Loyal, and P. Sanyal. "Marine to continental transition in Himalayan foreland." Geological Society of America Bulletin 120, no. 9-10 (September 1, 2008): 1214–32. http://dx.doi.org/10.1130/b26265.1.

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Singh, B. P. "Marine to continental transition in Himalayan foreland: Discussion." Geological Society of America Bulletin 122, no. 5-6 (April 6, 2010): 954–55. http://dx.doi.org/10.1130/b26532.1.

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Bera, M. K., A. Sarkar, P. P. Chakraborty, R. S. Loyal, and P. Sanyal. "Marine to continental transition in Himalayan foreland: Reply." Geological Society of America Bulletin 122, no. 5-6 (April 6, 2010): 956–59. http://dx.doi.org/10.1130/b26591.1.

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Wei, Zhifu, Yongli Wang, Gen Wang, Ting Zhang, Wei He, Xueyun Ma, and Xiaoli Yu. "Enrichment Mechanism of the Upper Carboniferous-Lower Permian Transitional Shale in the East Margin of the Ordos Basin, China: Evidence from Geochemical Proxies." Geofluids 2020 (November 6, 2020): 1–14. http://dx.doi.org/10.1155/2020/8867140.

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The organic-rich shale of the Upper Carboniferous-Lower Permian transition period in the eastern margin of the Ordos Basin, China, was formed in a marine-continental facies sedimentary environment. With a high content of total organic carbon (TOC) and a large cumulative thickness, it is considered a good source rock for shale gas development. The sedimentary environment of marine-continental transitional shale is obviously different from that of marine shale, which leads to different enrichment characteristics of organic matter. In this paper, shale samples were collected from XX# well of the Taiyuan and Shanxi Formations across the Upper Carboniferous-Lower Permian, which is typical marine-continental transitional shale. The TOC, major elements, and trace elements were measured, and the formation and preservation conditions were investigated using multiple geochemical proxies, including paleoclimate, redox parameters, paleoproductivity, and controls on the accumulation of organic matter. The TOC of Shanxi Formation is higher than that of Taiyuan Formation. In the Taiyuan Formation, TOC is positively related to the redox index (V, U, and V/Cr), indicating that the dysoxic bottom water environment is the key factor controlling organic matter accumulation. For Shanxi Formation, there is a positive correlation between TOC and paleoclimate, which indicates that the enrichment of organic matter is affected by warm and humid paleoclimate and oxic environment. In addition, the paleoproductivity is lower with a positive correlation with TOC for the marine-continental transitional organic-rich shale, suggesting that it was inferior to the gathering of organic matter.
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Cui, Z., S. Davies, K. S. Carslaw, and A. M. Blyth. "The response of precipitation to aerosol through riming and melting in deep convective clouds." Atmospheric Chemistry and Physics Discussions 10, no. 11 (November 25, 2010): 29007–50. http://dx.doi.org/10.5194/acpd-10-29007-2010.

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Abstract. We have used a 2-D axisymmetric, non-hydrostatic, bin-resolved cloud model to examine the impact of aerosol changes on the development of mixed-phase convective clouds. We have simulated convective clouds from four different sites (three continental and one tropical marine) with a wide range of realistic aerosol loadings and initial thermodynamic conditions (a total of 93 different clouds). It is found that the accumulated precipitation responds very differently to changing aerosol in the marine and continental environments. For the continental clouds, the scaled total precipitation reaches a maximum for aerosol that produce drop numbers at cloud base between 180–430 cm−3 when other conditions are the same. In contrast, all the tropical marine clouds show an increase in accumulated precipitation and deeper convection with increasing aerosol loading. For continental clouds, drops are rapidly depleted by ice particles shortly after the onset of precipitation. The precipitation is dominantly produced by melting ice particles. The riming rate increases with aerosol when the loading is very low, and decreases when the loading is high. Peak precipitation intensities tend to increase with aerosol up to drop concentrations (at cloud base) of ~500 cm−3 then decrease with further aerosol increases. This behaviour is caused by the initial transition from warm to mixed-phase rain followed by reduced efficiency of mixed-phase rain at very high drop concentrations. The response of tropical marine clouds to increasing aerosol is different to, and larger than, that of continental clouds. In the more humid tropical marine environment with low cloud bases we find that accumulated precipitation increases with increasing aerosol. The increase is driven by the transition from warm to mixed-phase rain. Our study suggests that the response of deep convective clouds to aerosol will be an important contribution to the spatial and temporal variability in cloud microphysics and precipitation.
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Cui, Z., S. Davies, K. S. Carslaw, and A. M. Blyth. "The response of precipitation to aerosol through riming and melting in deep convective clouds." Atmospheric Chemistry and Physics 11, no. 7 (April 15, 2011): 3495–510. http://dx.doi.org/10.5194/acp-11-3495-2011.

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Abstract. We have used a 2-D axisymmetric, non-hydrostatic, bin-resolved cloud model to examine the impact of aerosol changes on the development of mixed-phase convective clouds. We have simulated convective clouds from four different sites (three continental and one tropical marine) with a wide range of realistic aerosol loadings and initial thermodynamic conditions (a total of 93 different clouds). It is found that the accumulated precipitation responds very differently to changing aerosol in the marine and continental environments. For the continental clouds, the scaled total precipitation reaches a maximum for aerosol that produce drop numbers at cloud base between 180–430 cm−3 when other conditions are the same. In contrast, all the tropical marine clouds show an increase in accumulated precipitation and deeper convection with increasing aerosol loading. For continental clouds, drops are rapidly depleted by ice particles shortly after the onset of precipitation. The precipitation is dominantly produced by melting ice particles. The riming rate increases with aerosol when the loading is very low, and decreases when the loading is high. Peak precipitation intensities tend to increase with aerosol up to drop concentrations (at cloud base) of ~500 cm−3 then decrease with further aerosol increases. This behaviour is caused by the initial transition from warm to mixed-phase rain followed by reduced efficiency of mixed-phase rain at very high drop concentrations. The response of tropical marine clouds to increasing aerosol is different to, and larger than, that of continental clouds. In the more humid tropical marine environment with low cloud bases we find that accumulated precipitation increases with increasing aerosol. The increase is driven by the transition from warm to mixed-phase rain. Our study suggests that the response of deep convective clouds to aerosol will be an important contribution to the spatial and temporal variability in cloud microphysics and precipitation.
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Ning, Shitan, Peng Xia, Fang Hao, Jinqiang Tian, Yong Fu, and Ke Wang. "Pore Fractal Characteristics between Marine and Marine–Continental Transitional Black Shales: A Case Study of Niutitang Formation and Longtan Formation." Fractal and Fractional 8, no. 5 (May 13, 2024): 288. http://dx.doi.org/10.3390/fractalfract8050288.

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Marine shales from the Niutitang Formation and marine–continental transitional shales from the Longtan Formation are two sets of extremely important hydrocarbon source rocks in South China. In order to quantitatively compare the pore complexity characteristics between marine and marine–continental transitional shales, the shale and kerogen of the Niutitang Formation and the Longtan Formation are taken as our research subjects. Based on organic petrology, geochemistry, and low-temperature gas adsorption analyses, the fractal dimension of their pores is calculated by the Frenkel–Halsey–Hill (FHH) and Sierpinski models, and the influences of total organic carbon (TOC), vitrinite reflectance (Ro), and mineral composition on the pore fractals of the shale and kerogen are discussed. Our results show the following: (1) Marine shale predominantly has wedge-shaped and slit pores, while marine–continental transitional shale has inkpot-shaped and slit pores. (2) Cylindrical pores are common in organic matter of both shale types, with marine shale having a greater gas storage space (CRV) from organic matter pores, while marine–continental transitional shale relies more on inorganic pores, especially interlayer clay mineral pores, for gas storage due to their large specific surface area and high adsorption capacity (CRA). (3) The fractal characteristics of marine and marine–continental transitional shale pores are influenced differently. In marine shale, TOC positively correlates with fractal dimensions, while in marine–continental shale, Ro and clay minerals have a stronger influence. Ro is the primary factor affecting organic matter pore complexity. (4) Our two pore fractal models show that the complexity of the shale in the Longtan Formation surpasses that of the shale in the Niutitang Formation, and type I kerogen has more complex organic matter pores than type III, aiding in evaluating pore connectivity and flow effectiveness in shale reservoirs.
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Monesi, Edoardo, Giovanni Muttoni, Giancarlo Scardia, Fabrizio Felletti, Fabio Bona, Benedetto Sala, Fabrizio Tremolada, Carlo Francou, and Gianluca Raineri. "Insights on the opening of the Galerian mammal migration pathway from magnetostratigraphy of the Pleistocene marine-continental transition in the Arda River section (northern Italy)." Quaternary Research 86, no. 2 (September 2016): 220–31. http://dx.doi.org/10.1016/j.yqres.2016.07.006.

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AbstractWe investigated the magnetostratigraphy of the Arda River section (northern Italy) where the transition from marine to continental sedimentation occurring in the Po River basin during the Pleistocene is registered. Four magnetic polarity reversals were used to construct an age model of sedimentation aided by marine biostratigraphy and tied to a standard δ18O curve from the literature. The section spans from the Olduvai subchron (1.94-1.78 Ma) across the Jaramillo subchron (1.07-0.99 Ma) up to the Brunhes—Matuyama boundary (0.78 Ma). The onset of continental deposition occurred during marine isotope stage (MIS) 30 at ∼1.04 Ma. An association of Villafranchian and Early Galerian mammals, including Sus strozzii and Ursus dolinensis, has been found in the continental sediments dated to MIS 29-27 (∼0.99 Ma). Above follows a prominent fluvial conglomerate attributed to the first major low stand of the Pleistocene culminating with MIS 22 at ∼0.9 Ma during the late Early Pleistocene climate turnover (EPT). These and other data from the literature are used to reconstruct the onset of continental deposition in the greater Po basin and shed light on the opening of the migration pathway that brought far-traveled Galerian mammal immigrants to enter Europe for the first time during the EPT.
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Mourier, Thomas, Peter Bengtson, Michel Bonhomme, Emile Buge, Henri Cappettta, Jean-Yves Crochet, Monique Feist, et al. "The Upper Cretaceous - Lower Tertiary marine to continental transition in the Bagua basin, northern Peru - Paleontology, biostratigraphy, radiometry, correlations." Newsletters on Stratigraphy 19, no. 3 (October 26, 1988): 143–77. http://dx.doi.org/10.1127/nos/19/1988/143.

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Dissertations / Theses on the topic "Marine to continental transition"

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Alves, Luizemara Soares. "Estudo da margem continental ibérica ocidental com base em dados gravimétricos e magnetométricos regionais." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6240.

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Os métodos potenciais são conhecidos como uma ferramenta útil para estudos regionais. Na Ibéria Ocidental, a gravimetria e a magnetometria podem ser utilizadas para auxiliar no entendimento de algumas questões sobre a estruturação tectônica offshore. Nesta região, tanto as estruturas geradas pela quebra continental, quanto às herdadas do embasamento variscano, tem uma importante contribuição para a resposta geofísica regional observada com estes métodos. Este trabalho tem como objetivo correlacionar as feições geofísicas observadas com alguns modelos geológicos do arcabouço tectônico da Ibéria Ocidental já publicados na literatura. Mapas filtrados foram usados para auxiliar no reconhecimento de diferentes assinaturas geofísicas, os quais foram calculados a partir dos mapas de gravidade Bouguer e do campo magnético total tais como o gradiente horizontal total, derivada tilt, derivada vertical, e integral vertical. O domínio crustal continental foi definido a partir da interpretação dos dados gravimétricos, utilizando gradiente de gravidade horizontal total da Anomalia Bouguer. Os dados magnéticos, originais e filtrados, foram utilizados para identificar mais três domínios regionais offshore, que sugerem a existência de três tipos de crosta não-siálica. Dois deles são propostos como domínios de transição. A região da crosta de transição mais próxima do continente tem uma fraca resposta regional magnética, e a porção mais distal é um domínio de anomalia de alta amplitude, semelhante à resposta magnética oceânica. O limite crustal oceânico não pôde ser confirmado, mas um terceiro domínio offshore, a oeste da isócrona C34, poderia ser considerado como crosta oceânica, devido ao padrão magnético que apresenta. Alguns lineamentos do embasamento foram indicados na crosta continental offshore. As feições gravimétricas e magnéticas interpretadas coincidem, em termos de direção e posição, com zonas de sutura variscanas, mapeados em terra. Assim, esses contatos podem corresponder à continuação offshore destas feições paleozoicas, como o contato entre as zonas de Ossa Morena-Zona Centro-Ibérica. Nesta interpretação, sugere-se que a crosta continental offshore pode ser composta por unidades do Sudoeste da Península Ibérica. Isto permite considerar que a Falha de Porto-Tomar pertence a uma faixa de deformação strike-slip, onde parte das bacias mesozoicas da margem continental está localizada.
Potential field methods are known as a very useful tool to regional studies. On Western Iberia, gravimetric and magnetometric data could be helpful to understand some questions about the offshore tectonic framework. In this area, both continental break-up features and inherited continental basement structures have a strong contribution to compose the regional geophysical response on gravimetric and magnetometric maps. This work aims to correlate observed geophysical features of the Iberian margin with some geological models about the tectonic framework of Western Iberia, already published on literature. Filtered maps were used to recognize different geophysical signatures, which were computed from both calculated Bouguer gravity and total magnetic field, such as total horizontal gradient, tilt derivative, vertical derivative, and vertical integration. The continental crustal domain was defined from gravity data interpretation using an enhanced total horizontal gradient of Bouguer Anomaly maps. Magnetic data was used to identify three more regional offshore domains that could indicate three types of non-sialic crust. Two of them are proposed as transitional domains. The landward transitional crust has a very weak regional magnetic response, and the seaward one is a high amplitude anomaly domain, similar to oceanic magnetic response. The oceanic crustal boundary was not confirmed, but a third offshore domain, seaward from C34 isochron, could be considered as oceanic crust by its magnetic pattern. Some basement lineaments were indicated in the offshore continental crust. Gravimetric and magnetic features coincide in terms of their direction and position with Variscan suture zones mapped onshore. Therefore these contacts could correspond the offshore continuation of these Paleozoic features, such as the Ossa-Morena Zone and Centro-Ibérica Zone suture zone. In this interpretation, offshore continental crust could be formed by units from Southwest Iberia. It allows considering the Porto-Tomar fault as a part of a swath of strike-slip deformation, where mesozoic basins are located.
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Bouton, Anthony. "Facteurs de contrôle extrinsèques des dépôts microbiens récents en domaine de transition continental-marin." Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOS012/document.

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Les microbialites, dépôts lithifiés d’origine microbienne, sont des structures organosédimentaires documentées depuis plus de 3,5 milliards d’années. La compréhension de ces structures, des conditions et des modalités de leur mise en place, nous apporte des informations précieuses sur l’origine de la vie sur Terre. Cette thématique de recherche est également en plein essor du fait de ses implications économiques majeures concernant les hydrocarbures. La reconstitution des environnements associés aux structures microbiennes fossiles reste incertaine, notamment entre milieux de dépôts marins ou continentaux. Ces deux environnements contrastés ont été étudiés à travers deux exemples modernes, Cayo Coco (Cuba) en domaine marin lagunaire et le Grand Lac Salé (Utah, USA) en domaine lacustre continental dans le but d’identifier des critères diagnostiques pour discriminer ces environnements dans le registre fossile.La formation des microbialites résulte de la minéralisation et de la lithification d’un tapis microbien sous l’influence d’une composante métabolique (intrinsèque) liée à l’activité du tapis microbien, et d’une composante environnementale (extrinsèque). L’objectif de ce travail était de replacer à différentes échelles les dépôts microbiens dans leur contexte environnemental et de comprendre les influences directes des paramètres extrinsèques sur : (1) les processus de minéralisation des tapis microbiens et la formation de microbialites, (2) la morphologie des structures microbiennes, (3) la distribution spatio-temporelle des microbialites et des sédiments associés, et enfin (4) les relations entre les tapis microbiens et microbialites et leur environnement
Lithified microbial deposits, considered as microbialites, are organosedimentary structures observed since 3.5 billion years. Understanding the mechanisms and environmental conditions leading to their formation may provide valuable information about the origin of life on Earth. Our interest on this research topic has increased owing to the economic implications of these deposits, especially concerning the hydrocarbons. The reconstruction of the environments associated with microbial structures remains uncertain in the fossil record, especially between marine and continental domains. These two contrasting environments were studied through two modern examples: (1) a marine-fed lagoon area in Cayo Coco (Cuba), and the continental lake of the Great Salt Lake (Utah, USA) in order to identify diagnostic criteria allowing to distinguish both environments in the fossil record.Microbialite result from mineralization and lithification of microbial mats under the influence of metabolic chemical reactions (intrinsic) related to the activity of the microbial biomass and environmental (extrinsic) conditions. The objective of this PhD is to replace microbial deposits, at different scales, in their context of formation to highlight the significance of extrinsic parameters on: (1) the mineralization processes and the formation of microbialites, (2) the morphologies of observed microbial structures, (3) their spatial distribution, and (4) the relationship between microbial mats and microbialite and their environment
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Nunez, del Prado Hernando. "Systèmes de dépôts et évolution sédimentaire des séries de transition marin-continental dans le synclinorium de Guarga (bassin sud-pyrénéen) : (Province de Huesca N-Espagne)." Pau, 1986. http://www.theses.fr/1986PAUU300X.

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MAGALHÃES, José Ricardo Gonçalves. "Compartimentação tectono-sedimentar da Bacia da Paraíba, a partir da integração de métodos potenciais e interpretação sísmica de dados OFFSHORE." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/17212.

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Vários trabalhos têm tentado abordar a evolução das margens conjugadas do Atlântico, incluindo o nordeste do Brasil e o oeste da África. Entretanto, o avanço de pesquisas anteriores tem sido dificultado em razão da falta de dados na região marginal da porção oriental do nordeste do Brasil, principalmente na área inserida entre a Zona de Cisalhamento de Pernambuco e o Alto de Touros. Este fato tem imposto limitações ao desenvolvimento de modelos regionais sobre a evolução geotectônica e paleogeográfica desta região, assim como na correlação com sua contraparte na África. Nesta dissertação é apresentada uma investigação realizada com base em dados gravimétricos, magnéticos e sísmicos regionais. Os resultados mostraram que esta região representa um alto do embasamento com a orientação regional das principais estruturas tectônicas (ENE-WSW), ortogonais as estruturas desenvolvidas durante o processo de abertura das bacias da Paraíba e da Plataforma de Natal (NNE-SSW e NNW-SSE). Sobre o embasamento continental formou-se uma plataforma estreita com uma cobertura sedimentar pouco espessa (0,8-2,5 km) e uma quebra abrupta da plataforma, criando uma vasta zona de bypass através do talude. A análise de uma seção sísmica profunda revelou que a crosta continental afinada (crosta transicional) representa uma estreita zona e que o limite crosta continental-oceânica (COB) está localizado a aproximadamente 100 km a leste da atual linha de costa, na Bacia da Paraíba, e a 70 km, na Bacia da Plataforma de Natal. A modelagem geofísica, integrada com a interpretação sísmica, indica que esta região é caracterizada por um afinamento abrupto da crosta continental, com a consequente ascensão súbita da Moho. Também há evidências da existência de uma zona de crosta continental extremamente afinada, a qual foi interpretada como crosta proto-oceânica. Estes novos dados demonstram que esta área apresenta fortes similaridades com margens rifteadas não vulcânicas ou pobres em magma.
Several studies have tried to address the evolution of the Atlantic conjugate margins, including Northeast Brazil and West Africa. However, past research advances has been hindered by a lack of data for the marginal region in the eastern portion of northeastern Brazil, extending from the Pernambuco Shear Zone to the Touros High. This situation has imposed serious limitations on the development of a regional view of the geotectonic and paleogeographic evolution of this area and on correlations with regional counterparts in Africa. Here, we present an investigation using regional gravimetric, magnetic and seismic data. The results show that this region represents a basement high with regional orientation of tectonic structures (ENE-WSW) orthogonal at structures developed during the open processes of the Paraíba and Natal Platform Basins (NNE-SSW and NNW-SSE). The continental basement forming a narrow platform with a thin sedimentary cover (0.8-2.5 km) and an abrupt shelf break, which created a large bypass zone towards the slope. The analysis of a deep seismic section revealed that thinned continental crust (transitional crust) occupies a narrow zone and that the continental-oceanic boundary (COB) is located approximately 100 km to the east of the present coastline, at Paraíba Basin, and 70 km, at Natal Platform Basin. Geophysical modeling integrated with interpretation of the seismic data suggests that this region is characterized by an abrupt thinning of continental crust, with an accompanying sudden rise of the Moho. There are also indications for the existence of a zone of extremely thinned continental crust, which was interpreted as protooceanic crust. Our findings suggest that the study area shows strong similarities to nonvolcanic or magma-poor rifted margins.
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Brionne, Charles. "Signatures morphosédimentaires de la dynamique juxta-glaciaire à la transition de fronts glaciaires marins à terrestres : le cas de la Côte-Nord du Québec (estuaire et golfe du St Laurent)." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAH005.

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Cette thèse combine une double approche géomorphologique et sédimentologique associée à l’utilisation de données LiDAR, bathymétriques, photogrammétrie drone et de datations radiocarbones. Elle a permis de reconstituer les paléos dynamiques glaciaires en contexte de déglaciation pour l’Inlandsis Laurentidien depuis le dernier maximum glaciaire, il y a environ 20 000 ans, et plus précisément au passage d’une marge glaciaire ancrée en mer à une marge glaciaire continentale Deux études ont été menées conjointement, soit : (1) la cartographie, la synthèse et la proposition d’un modèle concernant les mégacannelures de la Côte-Nord du Saint-Laurent, une première pour ces morphologies et (2) la reconstruction de l’enregistrement géomorphologique et morphosédimentaire du complexe sédimentaire de Pentecôte, mimant précisément cette transition. D’une manière générale, cette thèse démontre l’importance de l’héritage structural et de la physiographie du plancher au marge glaciaire dans la reconstruction de la dynamique glaciaire de retrait de la marge du LIS oriental
This thesis combines a dual geomorphological and sedimentological approach with the use of LiDAR data, bathymetry, drone photogrammetry and radiocarbon dating. It has enabled us to reconstruct the glacial paleodynamics in a deglaciation context for the Laurentide ice sheet since the last glacial maximum, around 20,000 years ago, and more specifically during the transition from an ice margin anchored at sea to a continental ice margin: (1) mapping, synthesising and proposing a model for the megagrooves of the North Shore of the St Lawrence, a first study for these morphologies, and (2) reconstructing the geomorphological and morphosedimentary record of the Pentecôte sedimentary complex, which precisely represents this transition. Overall, this thesis demonstrates the importance of the structural heritage and physiography of the floor at the glacial margin in the reconstruction of the glacial retreat dynamics of the eastern LIS margin
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Hamai, Lamine. "Étude thermomécanique de la zone de transition mer-continent de la marge algérienne : implication géodynamique." Thesis, Nice, 2016. http://www.theses.fr/2016NICE4021/document.

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Comprendre comment s’initie une subduction au niveau d’une marge passive est un problème géodynamique majeur, mais il reste très débattu en raison des forces nécessaires pour provoquer la flexion de la plaque plongeante, et dépasser la résistance frictionnelle de la lithosphère pour localiser cette subduction. Formant la bordure sud de la Méditerranée Occidentale, la marge algérienne subit des conditions aux limites en compression en raison de la convergence Afrique-Eurasie à un taux de moins de 1 cm/an. Ce contexte favorise l’inversion de cette marge nord-africaine et possiblement le début d’une subduction. En effet, des données géophysiques récentes acquises dans le bassin algérien (campagnes de MARADJA, 2003, 2005 (MARge Active d’el Djazaïr) et SPIRAL 2009 (Sismique Profonde et Investigations Régionales en ALgérie) ont montré des indices de déformation compressive récente. Nous avons utilisé les profils SPIRAL afin de calculer l’état isostatique de la lithosphère au voisinage de la limite océan-continent. Ceci nous a permis d'imager un Moho trop profond dans le domaine océanique, et plus superficiel dans le domaine continental, de part et d'autre d'une limite située vers le pied de pente de cette marge, donc un déséquilibre isostatique général de la marge. Nos résultats indiquent que la marge algérienne montre les mêmes anomalies isostatiques qu’au niveau d'une marge active, avec une zone de découplage océan/continent située en pied de marge. Ces anomalies peuvent être interprétées par un mécanisme de flexure des deux lithosphères en présence, que l’on peut simuler ensuite par une modélisation en éléments finis d’une plaque mince élastique
Understanding how subduction initiates at a passive margin is a major geodynamic question, which remains debatted because of the forces necessary to overcome bending and frictional resistance of the lithosphere and initiate this subduction. Along the southern shore of the Western Mediterranean Sea, the Algerian margin undergoes ~NS compression due to the African-Eurasian convergence at a rate of less than ~ 1 cm / year. This setting causes tectonic inversion of this North African passive margin and possibly incipient subduction. Indeed, recent geophysical marine data acquired in the Algerian Basin (MARADJA, 2003, 2005MARge Active d’el Djazaïr) and SPIRAL 2009 (Deep Seismic and Regional Investigations in Algeria campaigns) showed evidence of recent compressive deformation. We used SPIRAL wide-angle seismic profiles to determine the state of isostatic equilibrium at the vicinity of the continent-ocean boundary. This allowed us to image a too deep Moho in the oceanic part, and a too shallow one in the continental domain, with a boundary between both domains located at the margin toe. These results indicate that the Algerian margin display the same isostatic anomalies as an active margin. This isostatic disiquilibrium may be simulated by the flexural bending of two lithospheric plates that can be modelled by a finite element procedure. This modeling shows larger vertical deflection in the central part of the study area (6-7 km) compared to the earsternmost and westernmost profiles (3 km)
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Walsh, John Patrick. "Continental-margin sedimentation : a wet-tropical perspective from New Guinea /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/11017.

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Prescott, Clifford Neill. "Marine geophysical investigation of the Hatton Bank volcanic passive continental margin." Thesis, Durham University, 1988. http://etheses.dur.ac.uk/6660/.

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The Durham/Cambridge/Birmingham Universities two-ship marine geophysical cruise to the Hatton Bank continental margin took place in May/June 1985, during which single- and two-ship seismic reflection/refraction data, together with under way gravity and magnetic anomaly, and bathymetric data were collected within a 200 km by 150 km area straddling the continent-ocean transition. The processing, modelling and interpretation of four two-ship synthetic aperture profiles (SAP) and the gravity and magnetic anomaly data is presented. Gravity models show that a density model based on the crustal velocity structure defined by synthetic seismogram modelling of the two-ship expanding spread profiles is insufficient to reproduce the observed gravity profile across the margin. This requires additional contributions in the form of density gradients in the underlying sub-crustal part of the lithosphere and asthenosphere, and this is investigated by thermal modelling. Analysis of the magnetic anomaly data shows that oceanic magnetic anomalies 21 and 22 are developed in the north-west of the 1985 survey area. Anomalies 23 and 24 cannot be recognised due to post-rift igneous activity and/or subaerial seafloor spreading. The positions of anomalies 23 and 24B are reconstructed within the survey area, and the theoretical anomaly 24B position is used to determine the position of the continent-ocean boundary. Analysis of the anomalies recorded on the upper continental slope shows that the acoustic basement in this area is volcanic. Interpretation of the SAP profiles shows that the margin can be described in terms of three distinct volcanic sequences. The continental sequence is composed of lavas extruded onto continental crust during a period of continental volcanism which occurred before the onset of seafloor spreading just prior to anomaly 24B.The sequence thickens to the north-west, to form a set of seaward-dipping reflectors. The oceanic sequence comprises oceanic crust within which structurally different seaward-dipping dipping reflectors are developed. This sequence is associated with the reconstructed positions of anomalies 23 and 24B, and is interpreted as having formed during a period of subaerial seafloor spreading. The late sequence separates, and in part overlies the continental and oceanic sequences. Magnetic anomalies associated with the late sequence are arcuate, and have high amplitudes, implying an origin other than simple seafloor spreading. The late sequence is interpreted as originating from post-rift igneous activity in the Eocene.
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Hemer, Mark A. "The oceanographic influence of sedimentation on the continental shelf : a numerical comparison between tropical and Antarctic environments /." Connect to this title online, 2003. http://adt.lib.utas.edu.au/public/adt-TU20051223.102442.

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Close, David Ian. "A marine geophysical study of the Wilkes Land rifted continental margin, Antarctica." Thesis, University of Oxford, 2005. http://ora.ox.ac.uk/objects/uuid:bfc7eee9-de28-4934-8f79-82b300a5f706.

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The Wilkes Land margin of East Antarctica, conjugate to the southern Australian margin, is a non-volcanic rifted margin that formed during the Late Cretaceous. During 2000-01 and 2001-02, Geoscience Australia (GA) acquired ~10,000 line km of seismic reflection, magnetic anomaly, and gravity anomaly data, on the Wilkes Land margin. Seismic reflection and sonobuoy refraction data provide the first constraints on sediment thickness and images of the deep crustal structure for the extent of the Wilkes Land margin. Two major post-rift seismic-stratigraphic sequences are recognised, separated by a regionally correlatable unconformity. The unconformity is interpreted as Early- to Middle-Eocene (~50 Ma). This unconformity has previously been interpreted to represent the onset of continent-wide glaciation at ~34 Ma. A major unconformity at the base of post-rift sediments is interpreted as a breakup unconformity, of approximately Turonian (85-90 Ma) age. Timing the onset of seafloor spreading using lineated magnetic anomalies within the Australia-Antarctic Basin (AAB) is extremely difficult due to uncertainties in correlating anomalies to the geomagnetic reversal time scale. Modelling indicates that the anomaly commonly correlated to Chron 34y may, in some cases, be associated with high level intrusions and/or serpentinisation of exhumed upper-mantle peridotites. Process-oriented gravity modelling indicates that the Wilkes Land margin lithosphere is characterised by a relatively high effective elastic thickness (Te). Isostatic anomalies are most effectively reduced for models utilising Te = 30 km. Although the margin is broadly characterised by a high Te, zones of low Te are inferred from modelling. Spectral analysis of isostatic anomalies indicates that the power of the flexural isostatic anomalies is lower than the free air gravity anomalies. The margin does not appear to be segmented, at least in regard to its long-term strength. However, a change in initial, zero-elevation crustal thickness (Tc) is inferred from west to east. A Tc of ~35 km is inferred for western Wilkes Land, whereas eastern Wilkes Land is characterised by Tc = 29 to 31 km. Limited seismic refraction data from the conjugate margin indicates a similar trend from southwest to southeast Australia.
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Books on the topic "Marine to continental transition"

1

Valentine, Page C. The shelf-slope transition--canyon and upper slope sedimentary processes on the southern margin of Georges Bank: An examination of sedimentary environments in water depths of 150-600 meters and of how they are determined by the interaction of available sediment, bottom currents, and sea-floor morphology. Washington, D.C: U.S. G.P.O., 1987.

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Valentine, Page C. The shelf-slope transition--canyon and upper slope sedimentary processes on the southern margin of Georges Bank: An examination of sedimentary environments in water depths of 150-600 meters and of how they are determined by the interaction of available sediment, bottom currents, and sea-floor morphology. Washington, DC: U.S. Geological Survey, 1987.

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United States. Minerals Management Service, ed. Outer Continental Shelf: Marine minerals. [Washington, D.C.?]: U.S. Dept. of the Interior, Minerals Management Service, 1992.

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Tomoya, Akimichi, ed. Coastal foragers in transition. Osaka: National Museum of Ethnology, 1996.

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Walker, Pam. The continental shelf. New York: Facts on file, 2005.

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Walsh, John Joseph. On the nature of continental shelves. San Diego: Academic Press, 1988.

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Philippe, Béarez, and Ibarra Santacruz Ángel, eds. Peces marinos del Ecuador continental. Quito: SIMBIOE, 2004.

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Saldanha, Luiz. Fauna submarina Atlântica: Portugal continental, Açores, Madeira. 3rd ed. Mem Martins [Portugal]: Publiçacões Europa-América, 1995.

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R, Prothero Donald, Ivany Linda C, and Nesbitt Elizabeth R, eds. From greenhouse to icehouse: The marine Eocene-Oligocene transition. New York: Columbia University Press, 2003.

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name, No. From greenhouse to icehouse: The marine Eocene-Oligocene transition. New York: Columbia University Press, 2003.

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Book chapters on the topic "Marine to continental transition"

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Mather, Anne E., and Martin Stokes. "Marine to Continental Transition." In A Field Guide to the Neogene Sedimentary Basins of the Almería Province, SE Spain, 186–224. Oxford, UK: Blackwell Publishing Ltd., 2009. http://dx.doi.org/10.1002/9781444300604.ch5.

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May, Vincent. "Softer Solutions to Coastal Erosion: Making the Transition from Resistance to Resilience." In Coastal Systems and Continental Margins, 1–16. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0135-9_1.

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Gomes, Paulo Otávio, Benedito S. Gomes, Jorge J. C. Palma, Koji Jinno, and Jairo M. de Souza. "Ocean-continent transition and tectonic framework of the oceanic crust at the continental margin off NE Brazil: Results of LEPLAC project." In Atlantic Rifts and Continental Margins, 261–91. Washington, D. C.: American Geophysical Union, 2000. http://dx.doi.org/10.1029/gm115p0261.

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Chakraborty, Nivedita, Subir Sarkar, and R. Nagendra. "Continental-to-Marine Transition in an Ongoing Rift Setting: Barremian-Turonian Sediments of Cauvery Basin, India." In Mesozoic Stratigraphy of India, 587–622. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71370-6_20.

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Hay, William W. "Continental Rise." In Encyclopedia of Marine Geosciences, 1–4. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6644-0_155-3.

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Hay, William W. "Continental Slope." In Encyclopedia of Marine Geosciences, 1–5. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6644-0_156-3.

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Hay, William W. "Continental Rise." In Encyclopedia of Marine Geosciences, 122–24. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6238-1_155.

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Hay, William W. "Continental Slope." In Encyclopedia of Marine Geosciences, 124–27. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6238-1_156.

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Lallemand, Serge. "Active Continental Margin." In Encyclopedia of Marine Geosciences, 1–6. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6644-0_102-2.

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Fujiwara, Yoshihiro, and Koetsu Kon. "Marine Ecology: Continental Shelf to Deep Sea." In Japanese Marine Life, 255–62. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1326-8_21.

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Conference papers on the topic "Marine to continental transition"

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Apotrosoaei, V. A., M. Munteanu, and D. R. Roban. "Marine to Continental Sedimentary Environment Transition at the Paleogene-Miocene Boundary, South Carpathians Foreland." In 75th EAGE Conference and Exhibition incorporating SPE EUROPEC 2013. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131079.

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Starratt, Scott W., Jason Addison, Summer Praetorius, David Bukry, and Bruce P. Finney. "GULF OF ALASKA CONTINENTAL SHELF – A COMPLICATED GLACIAL TO MARINE TRANSITION IN THE LATE QUATERNARY." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-383317.

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Westgate, Z. J., R. D. Beemer, and D. J. DeGroot. "Implications of Glauconite Sands on US Offshore Wind Development." In Innovative Geotechnologies for Energy Transition. Society for Underwater Technology, 2023. http://dx.doi.org/10.3723/unfk6402.

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Glauconite is a high specific gravity, greenish black iron-potassium pellet found in shallow marine depositional environments along the US Atlantic Continental Shelf in areas associated with offshore wind developments. Glauconite affects the geotechnical properties of sediments in which it forms and poses risks to foundation installation and performance due to its transformation from a coarse-grained to a fine-grained material due to crushing. Dense, authigenic deposits exhibit less compressibility than other crushable soils, but degrade rapidly under loading due their high internal porosity, linked to their maturity. In situ cone penetrometer testing results exhibit high tip resistance, high sleeve friction, and positive or negative excess pore pressures depending on microstructure, hindering site characterisation using standard soil classification charts. Examples of high glauconite content (> 90% by weight) sand behaviour from onshore deposits along the Atlantic coast are presented, as part of the Joint Industry Project: Piling in Glauconitic Sands (PIGS). Soil properties are shown to be highly sensitive to initial specimen conditions and preparation method, affecting particle size distribution, plasticity and thixotropy, and shear strength. Its implications on offshore geotechnical site investigation and pile foundation design are discussed.
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Andeskie, Anna Sofia, and Kathleen C. Benison. "THE PERMIAN HUTCHINSON SALT MEMBER OF KANSAS: MARINE, CONTINENTAL, OR TRANSITIONAL?" In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-322518.

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Xu, Lifu. "Characteristics and effectiveness evaluation method of marine continental transitional shale reservoir." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6961.

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Wang, Zhuangsen. "Sedimentary control and reservoir response of marine continental transitional shale: Taking the eastern margin of Ordos Basin as an example in China." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.4978.

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Maurya, V., S. Fontes, and E. La Terra. "An Enhanced and Effective Technique for Demarcation of Continental – Oceanic Transition - Application for South Atlantic Conjugate Margins." In 79th EAGE Conference and Exhibition 2017. Netherlands: EAGE Publications BV, 2017. http://dx.doi.org/10.3997/2214-4609.201701310.

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Chu, Daoliang, Jinnan Tong, Michael J. Benton, and Haijun Song. "THE CORRELATION OF THE PERMIAN–TRIASSIC TRANSITIONAL BEDS AND MASS EXTINCTION IN CONTINENTAL-MARINE SILICICLASTIC SETTINGS OF WESTERN GUIZHOU AND EASTERN YUNNAN, SOUTHWESTERN CHINA." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-318745.

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Hu, Xiao, Yiqun Zhang, Xiaoya Wu, Haizhu Wang, and Xu Cui. "A Study on the CO2 Jet Erosion Natural Gas Hydrate with the Influence of Temperature and Confining Pressure." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0463.

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ABSTRACT Natural gas hydrate (NGH) has been regarded as important potential energy resource. CO2 jet erosion HBS can be combined with Radial Jet Drilling (RJD) technology to achieve high efficiency and low-cost gas hydrate mining. The replacement of CO2 hydrate and CH4 hydrate can also be used to form a stable cap layer on the hydrate reservoir to achieve CO2 storage. In this study, the Arbitrary Lagrangian Euler (ALE) method is used to establish a heat-liquid-solid coupling model for water/CO2 jet erosion HBS, and the CO2 phase change is considered. The influence of different temperature and pressure on jet erosion effect was studied. The results indicate that confining pressure has an inhibitory effect on jet erosion ability, which gradually weakens as the confining pressure increases from 5-10MPa. At confining pressures ranging from 0.1-2.5MPa, the erosion volume decreases with rising temperature due to the gaseous CO2 in the submerged environment, resulting in reduced resistance. The erosion effect is influenced by the characteristics of the jet. At 2.5-5MPa, the CO2 in the submerged environment undergoes a phase transition from gaseous to liquid. At 5-10MPa, the erosion volume increases with temperature due to the liquid CO2 in the submerged environment, resulting in relatively higher resistance. The erosion effect is affected by the fluid in the submerged environment. Additionally, under equivalent temperature and pressure conditions, CO2 jet exhibits superior erosion effectiveness compared to water jet. This study can provide theoretical basis and technical ideas for using RJD technology to mine hydrate and achieve "carbon peak and carbon neutrality". INTRODUCTION Natural gas hydrate is a kind of clean energy with great potential (Sloan, 2003). It is commonly found in marine sediments and permafrost at continental margins, especially in marine sediments (Chong et al., 2016; Michael et al., 2019). The global amount of organic carbon in NGH is twice that of fossil fuels combined (Yu et al., 2019; P. Zhang et al., 2021). So far, many countries in the world have successively formulated the exploitation plan of gas hydrate (Xiao & Zhang, 2021). It can be predicted that the research and exploitation of NGH will remain the focus of global attention for a long time in the future.
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Han*, Wei-Chung, Char-Shine Liu, Wu-Cheng Chi, and Yunshuen Wang. "Structural Inversion and Channel Evolution in a Transition Zone Across the Boundary Between Passive and Active Continental Margins: An Example From Offshore Southwestern Taiwan." In International Conference and Exhibition, Melbourne, Australia 13-16 September 2015. Society of Exploration Geophysicists and American Association of Petroleum Geologists, 2015. http://dx.doi.org/10.1190/ice2015-2203120.

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Reports on the topic "Marine to continental transition"

1

Lucking, S. K. The Enduring Mission of the Marine Corps Military Transition. Fort Belvoir, VA: Defense Technical Information Center, February 2009. http://dx.doi.org/10.21236/ada508043.

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Forkin, Keith A. Proactive Marine Corps Transition Assistance In The Twenty-First Century. Fort Belvoir, VA: Defense Technical Information Center, February 2015. http://dx.doi.org/10.21236/ada620284.

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Allen, John S., and Leonard J. Walstad. Assimilation Modeling of Coastal Transition Zone Data and Continental Slope Flow Fields. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada248692.

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Shapiro, L., B. F. Sherr, and E. B. Sherr. Controls on marine carbon fluxes via phytoplankton-mesoplankton interactions in continental shelf waters. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/6430486.

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Keen, C. E., and W. Kay. Deep marine multichannel seismic data from the Northeast Newfoundland Continental Margin - Lithoprobe East. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/130061.

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Shapiro, L., B. F. Sherr, and E. B. Sherr. Controls on marine carbon fluxes via phytoplankton-mesoplankton interactions in continental shelf waters. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/6525151.

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Paradis, S., G. J. Simandl, N. Drage, R J D'Souza, D. J. Kontak, and Z. Waller. Carbonate-hosted deposits (Mississippi Valley-type, magnesite, and REE-F-Ba) of the southeastern Canadian Cordillera: a review and isotopic data comparison. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/327995.

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The Mississippi Valley-type, magnesite, and REE-F-Ba deposits in the southeastern Canadian Cordillera are in the weakly deformed/metamorphosed Paleozoic carbonate platform of the Rocky Mountains. Most are hosted in dolostones of the middle Cambrian Cathedral, upper Cambrian Jubilee, and Upper Devonian Palliser formations and spatially associated with hydrothermal dolomite. They occur along structurally controlled facies transitions between the shallow-water carbonate platform and deeper water basin rocks of the Paleozoic continental margin. Their location and morphology reflect episodic rifting along the Paleozoic margin. The carbonate protolith was replaced by fine-grained 'replacive dolomite' followed by several stages of coarser saccharoidal, sparry, and saddle dolomites and sulfides replacing dolostone and filling open spaces. The 87Sr/86Sr, delta-18O, delta-13C, and fluid-inclusion data are consistent with high-temperature fluids interacting with host rocks and show influence of adjacent or underlying siliciclastic rocks. The large range of delta-34S values of sulfides suggests that thermochemical sulfate reduction of seawater sulfate was the main sulfur-reducing process, but bacterial sulfate reduction also occurred locally. Lead isotopes suggest a mixing trend involving highly radiogenic and non-radiogenic end members. These observations are consistent with hydrothermal fluids replacing protoliths, precipitating sulfides, and possibly REE-F-Ba mineralization.
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Bennett, Richard H., William B. Sawyer, Donald J. Walter, and Eric N. Litman. Pressure Attenuation and Geotechnical Properties in Surficial Marine Sediments: Gulf of Mexico Continental Shelf. Fort Belvoir, VA: Defense Technical Information Center, June 1992. http://dx.doi.org/10.21236/ada254834.

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Kay, W. A., and C. E. Keen. Deep marine multichannel seismic reflection data from the Grand Banks, eastern Canadian Continental Margin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1988. http://dx.doi.org/10.4095/130422.

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Lucatelli, D., J. M. R. Camargo, C. J. Brown, J. F. Souza-Filho, E. Guedes-Silva, and T. C. M. Araújo. Marine geodiversity of northeastern Brazil: a step towards benthic habitat mapping in Pernambuco Continental Shelf. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2017. http://dx.doi.org/10.4095/305889.

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