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Academic literature on the topic 'Southern margin'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Southern margin"

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Tuitt, Adrian, Simon Holford, Richard Hillis, John Underhill, Derek Ritchie, Howard Johnson, Ken Hitchen, Martyn Stoker, and David Tassone. "Continental margin compression: a comparison between compression in the Otway Basin of the southern Australian margin and the Rockall-Faroe area in the northeast Atlantic margin." APPEA Journal 51, no. 1 (2011): 241. http://dx.doi.org/10.1071/aj10017.

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There is growing recognition that many passive margins have undergone compressional deformation subsequent to continental breakup, including the southern Australian margin. This deformation commonly results in formation of domal anticlines with four-way dip closures that are attractive targets for hydrocarbon exploration, and many such structures host major hydrocarbon accumulations in the Otway and Gippsland basins; however, the driving mechanisms behind formation of these structures are not completely understood. We compare the history of post-breakup compression in the Otway Basin of the southern Australian margin, with that of the Rockall-Faroe area of the northeast Atlantic margin, which has been far more extensively studied with the aim of establishing a better understanding of the genesis and prospectivity of such structures. Both margins have experienced protracted Mesozoic rifting histories culminating in final continental separation in the Eocene, followed by distinct phases of compressional deformation and trap formation. Whilst the structural style of the anticlines in both margins is similar (mainly fault-propagation folds formed during tectonic inversion), the number, amplitude, and length of the structures in the northeast Atlantic margin are much higher than the southern Australian margin. We propose that compressional structures at both margins formed due to far-field stresses related to plate boundaries, but the magnitude of these stresses in the northeast Atlantic margin is likely to have been higher, and the strength of the lithosphere lower. In the northeast Atlantic margin, the presence of Early Cenozoic basalt lava flows may have also contributed to an increase in pore-fluid pressure in the underlying sediment making pre-existing faults more prone to reactivation.
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Parsiegla, N., J. Stankiewicz, K. Gohl, T. Ryberg, and G. Uenzelmann-Neben. "Southern African continental margin: Dynamic processes of a transform margin." Geochemistry, Geophysics, Geosystems 10, no. 3 (March 2009): n/a. http://dx.doi.org/10.1029/2008gc002196.

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Horozal, Senay, Jang-Jun Bahk, Sang Hoon Lee, Deniz Cukur, Roger Urgeles, Gil Young Kim, Seong-Pil Kim, Byong-Jae Ryu, and Jin-Ho Kim. "Mass-wasting processes along the margins of the Ulleung Basin, East Sea: insights from multichannel seismic reflection and multibeam echosounder data." Geological Society, London, Special Publications 477, no. 1 (April 30, 2018): 107–19. http://dx.doi.org/10.1144/sp477.18.

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AbstractSubmarine landslides represent a major, previously little recognized, geological hazard to the coastal communities. This study investigates the size, depth and degree of submarine landslides along the margins of the Ulleung Basin and examines how the shelf morphology and sediment supply affect the style and occurrence of slope failures. The slopes have experienced at least 38 episodes of submarine failures, which have left clear arcuate-shaped scarps that initiate at water depths of 150–1120 m. Individual landslides comprise volumes over the range 0.1–340 km3, cover 20–800 km2 on the seafloor and have runout distances of up to 50 km from the source. The headwall scarps are observed as being in excess of 500 m high. The height of scarps in the southern margin is significantly larger than in the western margin. Moreover, the volume of mass-transport deposits in the southern margin is also much higher compared to those from the western margin. The occurrence of the broad shelf (30–150 km wide) and high sedimentation rates in the southern margin might have led to large-scale slope failures. In contrast, the narrow shelf (<20 km) and low sedimentation rates in the western margin would only have promoted small-scale mass-wasting events.
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Peace, Alexander L., and J. Kim Welford. "Conjugate margins — An oversimplification of the complex southern North Atlantic rift and spreading system?" Interpretation 8, no. 2 (May 1, 2020): SH33—SH49. http://dx.doi.org/10.1190/int-2019-0087.1.

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The prevalence of conjugate margin terminology and studies in the scientific literature is testimony to the contribution that this concept and approach has made to the study of passive margins, and more broadly extensional tectonics. However, when applied to the complex rift, transform, and spreading system of the southern North Atlantic (i.e., the passive margins of Newfoundland, Labrador, Ireland, Iberia, and southern Greenland), it becomes obvious that at these passive continental margin settings, additional geologic phenomena complicate this convenient description. These aspects include (1) the preservation of relatively undeformed continental fragments, (2) formation of transform systems and oblique rifts, (3) triple junctions (with rift and spreading axes), (4) multiple failed rift axes, (5) postbreakup processes such as magmatism, (6) localized subduction, and (7) ambiguity in identification of oceanic isochrons. Comparison of two different published reconstructions of the region indicates the ambiguity in conducting conjugate margin studies. This demonstrates the need for a more pragmatic approach to the study of continental passive margin settings where a greater emphasis is placed on the inclusion of these possibly complicating features in palinspastic reconstructions, plate tectonics, and evolutionary models.
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Oldřich, Mauer, Houšková Kateřina, and Mikita Tomáš. "The root system of pedunculate oak (Quercus robur L.) at the margins of regenerated stands." Journal of Forest Science 63, No. 1 (January 30, 2017): 22–33. http://dx.doi.org/10.17221/85/2016-jfs.

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The paper aims to contribute to the determination of reasons causing the irregular growth of young pedunculate oaks occurring at the margins of naturally and artificially regenerated plots neighbouring with adult stands on alluvial sites. It presents analyses of aboveground biometric parameters, mortality, root system architecture of young trees, root density in the soil profile, global solar radiation and soil moisture content in dependence on the location of oaks at the northern, southern, eastern or western margins of the regenerated area and on the distance from the stand margin. The highest impact of the neighbouring adult stand is always recorded on the margin of the regenerated plot while its effect is weakening towards the plot centre, and fading away ca. 7 m behind the crown projection of adult trees. Regardless of the oak location (northern, southern, eastern or western margin), the cause is a high root density of marginal trees of the adult stand, which induces the critical lack of water under their crown projections.
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Holford, Simon, Nick Schofield, Justin MacDonald, Ian Duddy, and Paul Green. "Seismic analysis of igneous systems in sedimentary basins and their impacts on hydrocarbon prospectivity: examples from the southern Australian margin." APPEA Journal 52, no. 1 (2012): 229. http://dx.doi.org/10.1071/aj11017.

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The increasing availability of 3D seismic data from sedimentary basins at volcanic and non-volcanic continental margins has provided fundamental new insights into both the storage and transport of magma in the continental crust. As global hydrocarbon exploration increasingly focuses on passive margin basins with evidence for past intrusive and extrusive igneous activity, constraining the distribution, timing and pathways of magmatism in these basins is essential to reduce exploration risk. Producing and prospective Australian passive margin basins where igneous systems have been identified include the Bight, Otway, Bass, Gippsland and Sorell basins of the southern margin. This paper reviews both the impacts of volcanic activity on sedimentary basin hydrocarbon prospectivity (e.g. advective heating, reservoir compartmentalisation and diagenesis), and the styles, distribution and timing of late Cretaceous–Recent extrusive and intrusive igneous activity along basins of the southern Australian margin, providing illustrative examples based on 2D and 3D seismic reflection data.
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Bardet, Nathalie. "Maastrichtian marine reptiles of the Mediterranean Tethys: a palaeobiogeographical approach." Bulletin de la Société Géologique de France 183, no. 6 (December 1, 2012): 573–96. http://dx.doi.org/10.2113/gssgfbull.183.6.573.

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AbstractA global comparison of coeval Maastrichtian marine reptiles (squamates, plesiosaurs, chelonians and crocodyliformes) of Europe, New Jersey, northwestern Africa and Middle-East has been performed. More than twenty outcrops and fifty species (half of them being mosasaurids) have been recorded. PEA and Cluster Analysis have been performed using part of this database and have revealed that marine reptile faunas (especially the mosasaurid ones) from the Mediterranean Tethys are clearly segregated into two different palaeobiogeographical provinces: 1) The northern Tethys margin province (New Jersey and Europe), located around palaeolatitudes 30-40°N and developping into warm-temperate environments, is dominated by mosasaurid squamates and chelonioid chelonians; it is characterized by the mosasaurid association of Mosasaurus hoffmanni and Prognathodon sectorius. 2) The southern Tethys margin province (Brazil and the Arabo-African domain), located between palaeolatitudes 20°N-20°S and developping into intertropical environments, is dominated by mosasaurid squamates and bothremydid chelonians; it is characterized by the mosasaurid association of Globidens phosphaticus as well as by Halisaurus arambourgi and Platecarpus (?) ptychodon (Arabo-African domain). These faunal differences are interpreted as revealing palaeoecological preferences probably linked to differences in palaeolatitudinal gradients and/or to palaeocurrents.On a palaeoecological point on view and concerning mosasaurids, the mosasaurines (Prognathodon, Mosasaurus, Globidens and Carinodens) prevail on both margins but with different species. The ichthyophageous plioplatecarpines Plioplatecarpus (Northern margin) and Platecarpus (?) ptychodon (Southern margin) characterise respectively each margin. The halisaurine Halisaurus is present on both margins but with different species. Of importance, the tylosaurines remain currently unknown on the southern Tethys margin and are restricted to higher palaeolatitudes. Chelonians (bothremydids and chelonioids) are respective of each margin, which probably indicates lower dispersal capabilities compared to mosasaurids. The relative scarcity of plesiosaurs and crocodyliformes could be linked to different ecological preferences. The noteworthy crocodyliforme diversity increase in the Palaeogene is probably linked to mosasaurid extinction during the biological crisis of the K/Pg boundary.
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Nomikou, Paraskevi, Dimitris Evangelidis, Dimitrios Papanikolaou, Danai Lampridou, Dimitris Litsas, Yannis Tsaparas, Ilias Koliopanos, and Maria Petroulia. "Morphotectonic Structures along the Southwestern Margin of Lesvos Island, and Their Interrelation with the Southern Strand of the North Anatolian Fault, Aegean Sea, Greece." GeoHazards 2, no. 4 (December 14, 2021): 415–29. http://dx.doi.org/10.3390/geohazards2040023.

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A hydrographic survey of the southwestern coastal margin of Lesvos Island (Greece) was conducted by the Naftilos vessel of the Hellenic Hydrographic Service. The results have been included in a bathymetric map and morphological slope map of the area. Based on the neotectonic and seismotectonic data of the broader area, a morphotectonic map of Lesvos Island has been compiled. The main feature is the basin sub-parallel to the coast elongated Lesvos Basin, 45 km long, 10–35 km wide, and 700 m deep. The northern margin of the basin is abrupt, with morphological slopes towards the south between 35° and 45° corresponding to a WNW-ESE normal fault, in contrast with the southern margin that shows a gradual slope increase from 1° to 5° towards the north. Thus, the main Lesvos Basin represents a half-graben structure. The geometry of the main basin is interrupted at its eastern segment by an oblique NW-SE narrow channel of 650 m depth and 8 km length. East of the channel, the main basin continues as a shallow Eastern Basin. At the western part of the Lesvos margin, the shallow Western Basin forms an asymmetric tectonic graben. Thus, the Lesvos southern margin is segmented in three basins with different morphotectonic characteristics. At the northwestern margin of Lesvos, three shallow basins of 300–400 m depth are observed with WNW-ESE trending high slope margins, probably controlled by normal faults. Shallow water marine terraces representing the last low stands of the glacial periods are observed at 140 m and 200 m depth at the two edges of the Lesvos margin. A secondary E-W fault disrupts the two terraces at the eastern part of the southern Lesvos margin. The NE-SW strike-slip fault zone of Kalloni-Aghia Paraskevi, activated in 1867, borders the west of the Lesvos Basin from the shallow Western Basin. The Lesvos bathymetric data were combined with those of the eastern Skyros Basin, representing the southern strand of the North Anatolian Fault in the North Aegean Sea, and the resulted tectonic map indicates that the three Lesvos western basins are pull-aparts of the strike-slip fault zone between the Skyros Fault and the Adramytion (Edremit) Fault. The seismic activity since 2017 has shown the co-existence of normal faulting and strike-slip faulting throughout the 90 km long Lesvos southern margin.
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Comelles, Josep M. "Writing at the margin of the margin: medical anthropology in Southern Europe." Anthropology & Medicine 9, no. 1 (April 2002): 7–23. http://dx.doi.org/10.1080/13648470220139983.

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Petkovic, Peter. "Velocity Database for Australian Southern Margin Basins." ASEG Extended Abstracts 2003, no. 2 (August 2003): 1–5. http://dx.doi.org/10.1071/aseg2003ab132.

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Dissertations / Theses on the topic "Southern margin"

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Radeff, Giuditta. "Geohistory of the Central Anatolian Plateau southern margin (southern Turkey)." Phd thesis, Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2014/7186/.

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The Adana Basin of southern Turkey, situated at the SE margin of the Central Anatolian Plateau is ideally located to record Neogene topographic and tectonic changes in the easternmost Mediterranean realm. Using industry seismic reflection data we correlate 34 seismic profiles with corresponding exposed units in the Adana Basin. The time-depth conversion of the interpreted seismic profiles allows us to reconstruct the subsidence curve of the Adana Basin and to outline the occurrence of a major increase in both subsidence and sedimentation rates at 5.45 – 5.33 Ma, leading to the deposition of almost 1500 km3 of conglomerates and marls. Our provenance analysis of the conglomerates reveals that most of the sediment is derived from and north of the SE margin of the Central Anatolian Plateau. A comparison of these results with the composition of recent conglomerates and the present drainage basins indicates major changes between late Messinian and present-day source areas. We suggest that these changes in source areas result of uplift and ensuing erosion of the SE margin of the plateau. This hypothesis is supported by the comparison of the Adana Basin subsidence curve with the subsidence curve of the Mut Basin, a mainly Neogene basin located on top of the Central Anatolian Plateau southern margin, showing that the Adana Basin subsidence event is coeval with an uplift episode of the plateau southern margin. The collection of several fault measurements in the Adana region show different deformation styles for the NW and SE margins of the Adana Basin. The weakly seismic NW portion of the basin is characterized by extensional and transtensional structures cutting Neogene deposits, likely accomodating the differential uplift occurring between the basin and the SE margin of the plateau. We interpret the tectonic evolution of the southern flank of the Central Anatolian Plateau and the coeval subsidence and sedimentation in the Adana Basin to be related to deep lithospheric processes, particularly lithospheric delamination and slab break-off.
Il Bacino di Adana (Turchia meridionale) é situato in posizione esterna rispetto al margine sud-orientale del plateau anatolico centrale. Il bacino risulta ubicato in posizione strategica per registrare i principali cambiamenti della topografia e dell’assetto tettonico avvenuti durante il Neogene nel Mediterraneo orientale. Utilizzando dati sismici provenienti dall’industria petrolifera abbiamo correlato 34 profili sismici con le unitá corrispondenti affioranti nel Bacino di Adana. La conversione da tempi a profonditá dei profili sismici interpretati ci ha permesso di ricostruire la curva di subsidenza del Bacino di Adana e di individuare un evento caratterizato da un importante aumento della subsidenza associato ad un considerevole incremento del tasso di sedimentazione. Questo evento, avvenuto tra 5.45 e 5.33 Ma ha portato alla deposizione di quasi 1500 km3 di conglomerati e marne. La nostra analisi di provenienza della porzione conglomeratica mostra che la maggior parte del sedimento proviene dal margine sud-orientale del plateau anatolico centrale e dalle aree situate a nord di questo. La comparazione di questi risultati con la composizione litologica di conglomerati recenti e con le litologie affioranti nei bacini di drenaggio attuali mostra cambiamenti rilevanti tra le aree di provenienza del sedimento Messiniane e quelle attuali. Riteniamo che questi cambiamenti nelle aree sorgente siano il risultato del sollevamento e della successiva erosione del margine sud-orientale del plateau anatolico centrale. Questa ipotesi é supportata dal confronto delle curve di subsidenza del Bacino di Adana e del Bacino di Mut, un bacino principalmente neogenico situato sulla sommitá del margine meridionale del plateau. La comparazione delle due curve di subsidenza mostra che l’evento di forte subsidenza del Bacino di Adana é coevo ad un episodio di sollevamento del margine meridionale del plateau anatolico centrale. La raccolta di un fitto dataset strutturale acquisito nella regione di Adana mostra differenti stili deformativi per i margini nord-occidentale e sud-orientale del bacino. La porzione nord-occidentale del bacino, debolmente sismica, é caratterizzata da strutture estensionali e transtensive che tagliano I depositi neogenici, verosimilmente accomodando il sollevamento differenziale tra il bacino e il margine sud-orientale del plateau. Riteniamo che l’evoluzione tettonica del margine meridionale del plateau anatolico centrale e la contemporanea subsidenza e sedimentazione nel Bacino di Adana sia da ricondurre a processi litosferici profondi, in particolar modo delaminazione litosferica e slab break-off.
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Radeff, Giuditta [Verfasser], and Domenico [Akademischer Betreuer] Cosentino. "Geohistory of the Central Anatolian Plateau southern margin (southern Turkey) / Giuditta Radeff. Betreuer: Domenico Cosentino." Potsdam : Universitätsbibliothek der Universität Potsdam, 2014. http://d-nb.info/1058741004/34.

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Bergh, Eugene. "Neogene to quaternary foraminifera from the western margin of southern Africa." Doctoral thesis, Faculty of Science, 2019. http://hdl.handle.net/11427/30436.

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The western margin of southern Africa underwent major palaeoceanographic changes since the initiation of the Benguela Upwelling System during the Neogene. Microfossils in marine sediments provide key proxies in our understanding of how the margin evolved. Fossil shells (tests) of foraminifera (singlecelled protists) from twenty cores from the Namibian shelf (199 to 309 m water depth) and three cores from the western slope (874 to 3631 m water depth) of South Africa were studied to determine the middle Miocene to Quaternary stratigraphy, palaeoenvironment and palaeoceanography of the western margin of southern Africa. Cores from the Namibian shelf recovered middle Miocene calcareous mud in erosional contact with overlying Pliocene to Pleistocene phosphatic sediments. Strontium isotope stratigraphy and planktic foraminifera biostratigraphy provide age control of the Namibian shelf sediments. The planktic indicator species Globoquadrina dehsicens and Globigerinoides bisphericus support strontium isotope stratigraphy results for the olive-green mud unit of the northern Namibian shelf indicating an age of 16 to 14 Ma, and the overlying Plio-Pleistocene age of the phosphorite-rich unit supported by planktic indicator species Globorotalia truncatulinoides and Globorotalia (Globoconella) inflata. Middle Miocene foraminifera reflect a warmer, oligotrophic, subtropical, deeper environmental setting in contrast to the shallower depositional environment, cooler conditions and a eutrophic bottom water setting indicated by Pleistocene foraminifera in the phosphatic units. The palaeoenvironment on the Namibian shelf was progressively shoaling during the Pleistocene as sea level amplitudes increased. An Uvigerina spp.- dominated association occurs in deeper shelf deposits dated to the early Pleistocene and the Ammonia beccarii association occurs in shallower shelf deposits of the late Pleistocene to Holocene. The planktic and benthic foraminiferal stable oxygen isotope records, colour reflectance (L*) and non-carbonate mineral counts provide age control on cores from the western slope of South Africa, whose records extend to just beyond Glacial Termination (GT) II. Sediment and benthic foraminiferal accumulation rates were higher during interglacial periods and lower during glacial periods. The major planktic species in the slope cores include Globorotalia (Globoconella) inflata, Globigerina bulloides and Neogloboquadrina incompta. Principal component analysis (PCA) reveals that the major factors influencing planktic foraminiferal abundances are upwelling intensity, the penetration of colder waters during glacial periods and the inflow of subtropical waters from the South Indian Ocean during interglacial periods. The major benthic species in the slope cores include Uvigerina peregrina, Uvigerina hispidocostata and Cibicidoides wuellerstorfi indicating the delivery of organic matter and oxygen availability to have the largest influence on the benthic foraminiferal faunal composition. Uvigerina spp. on the slope show increased relative abundances during periods of lower oxygen conditions. Bottom water masses identified by Nd (neodymium isotopic compositions) values recorded by foraminifera, along with the stable carbon isotope composition and abundance of the benthic foraminifer C. wuellerstorfi indicate shifts from Southern Component Water to North Atlantic Deep Water during GT II and I. Variation in Nd values in an upper slope core (874 m water depth) indicate Antarctic Intermediate Water (AAIW) influence was stronger during glacial periods compared to interglacial periods.
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Mohamed, Hwedi Abdulsalam. "The Holocene palaeoenvironments of the rift margin in Southern Jordan (Wadi Faynan)." Thesis, University of Huddersfield, 2000. http://eprints.hud.ac.uk/id/eprint/4871/.

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Smart, Susannah Mary. "Asphaltites from the Southern Australian margin : submarine oil seeps or maritime artefacts? /." Adelaide, 1999. http://web4.library.adelaide.edu.au/theses/09SB/09sbs636.pdf.

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Hall, Lisa Sarah. "Cenozoic deformation at the southern end of the Hikurangi Margin, New Zealand." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403720.

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Ball, Philip Joseph. "Break-up history and evolution of the southern passive margin of Australia." Thesis, Royal Holloway, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421466.

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Despite intensive studies, the process of continental break-up remains enigmatic, in large part because the record of break-up is located in deepwater regions. Existing models are based on a limited academic data set. This study aims to add to our data base of weakly magmatic margins worldwide through a study of the continental breakup between Australia and Antarctica. Earlier studies did not examine the conjugate margins in tandem, and the deep water setting hampered attempts to establish a regional chrono-stratigraphic framework. Furthermore, existing reconnaissance seismic reflection and sparse refraction data provided only a 2-D view of small areas of the >1800 km-long margin. Thus, there was little consensus in interpretations of the evolution of the southern margin of Australia, as well as models for break-up. This study aims to (i) establish the structural variability and framework of the Australian and Antarctic margins; (ii) determine the along-axis segmentation of the margin and its relation to faulting and seafloor spreading processes; (iii) determine the sediment thickness and crustal thickness in 3-D; (iv) reconcile the position of the ocean-continent boundary derived from magnetic anomaly and seismic interpretations. These results are then interpreted in light of existing data from the conjugate Antarctic margin to propose a new model for continental break-up between the Australo-Antarctic conjugate margins. I analyse a new compilation of merged onshore, offshore, and satellite gravity data, as well as seismic reflection, magnetic, and well data from the Great Australian Bight, southern Australia. Estimates of the 3-D crustal thickness, depth to basement, the position and nature of the continent-ocean-boundary, and interpretations of major basement-involved structures were derived from analyses of terrain-corrected Bouguer gravity data. The gravity interpretations are constrained with seismic reflection, refraction and magnetic data. The potential field modelling within this thesis has been conducted using Geosoft and in-house software. Continental break-up between Australia and Antarctica occurred oblique to the identified major basement terrains and pre-existing structures. Two spatially and temporally discrete rift events are identified along the Australian southern margin. Integrated structural patterns are used to suggest that the first rift phase (165-115 Ma)developed within two discrete overlapping rift systems; the W-E trending Bight-Wilkes rift (165-135 Ma) and the NW-SE trending Otway-Adelie (145-115 Ma) rift. Each rift system is interpreted to terminate at or near to the boundary of the mechanically strong Gawler craton, suggesting that the craton served as an obstacle to rift propagation The second identified rift phase (92-50 Ma) corresponds with the localization of strain to a narrow rift zone within the interpreted COT zone. Within the transitional rift basement faults are observed to young both oceanwards and to the SE indicating that rifting processes were diachronous within the transitional rift itself. Concomitant with the transitional rift, complex and anomalously high density, high susceptibility structural highs are observed. The basement highs either have a close relationship to basement-involved faults or some appear to be intrusive within the transitional crust. These anomalous basement features are tentatively interpreted to be mafic bodies. By analogy to other non-volcanic margins (e.g. Whitmarsh et al. 2000; Beslier et al. 2004) it is likely that they represent either exhumed upper mantle, serpentinite, or lower crustal rocks or partial melt products derived from the underlying upper mantle. Plate reconstructions of the continent-ocean-transition [COB] indicate that break-up initiated within the centre of the Australo-Antarctic plate at -83 to 79 Ma. The reconstructions of the newly defined, gravity and seismic, COB's across the Australian and Antarctic margins reveal large degrees of overlap casting doubts upon the validity of the existing poles of rotation to replicate the early kinematics of the Australian and Antarctic margins. For the Otway-Adelie Sector the asymmetry of break-up, the delayed onset of oceanic accretion and the large overlaps in reconstructions may be explained with a two phase oblique-shear model. It is proposed, therefore, that rifting and break-up between Australia and Antarctica occurred initially within a NW-SE regional plate divergence which switched to N-S at -61 Ma (post-c27y). Break-up or rather the onset of rapid oceanic accretion processes offshore the northern sector ofthe Otway-Adelie rift is inferred to have initiated by -53 Ma. The integration of the results presented within this thesis has been used to develop a new break-up model for Australia and Antarctica. These results provide new insights into continental break-up within weakly magmatic rift zones, as well as constraints for heat flow modeling and hydrocarbon prospectivity studies.
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Wolfenden, Ellen. "Evolution of the southern Red Sea Rift : birth of a magnetic margin." Thesis, Royal Holloway, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405194.

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Agurto, Detzel Hans. "Seismotectonics of the southern subduction Chilean margin revealed by recent aftershock sequences." Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/8553/.

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Subduction margins, as in the case of south-central Chile, are active seismotectonic environments and locus of the world largest earthquakes. In this thesis, two segments of the south-central Chilean subduction margin are studied: (A) the southernmost portion, at the termination of the Nazca-South America convergence (~46ºS), and (B) the segment located between 34º-38ºS, where the Mw 8.8 Maule Earthquake took place in 2010. Analysis of data from a local seismic network deployed in 2004-2005 in area A, indicates low levels of background seismicity with magnitudes ranging 0-3.4 Ml. The seismicity corresponds to shallow crustal events, mostly occurring within the upper 10 km. A third of the seismicity is associated to volcanic activity present in the area, while scarce seismicity is associated with a large strike-slip fault, the Liquiñe-Ofqui Fault System (LOFS), that intersects the region along the arc in a N-S-trend. In 2007, this region was affected by a seismic sequence with a peak of activity associated with a Mw 6.2 earthquake in April that year. A local seismic network was deployed after this main event in order to study its sequence of aftershocks, which provided a unique opportunity to characterise seismotectonically this area that usually lacks intermediate magnitude seismicity, including the calculation of a new local velocity model, accurate aftershock locations and computation of focal mechanisms. The results show P-wave velocities of ~5 km/s for the upper 5 km in accordance with the geology of the area, and low S-wave velocities for the upper 3 km of crust due to rock fracturing and the presence of fluids. An average Vp/Vs ratio of 1.76 was calculated for the region. The alignment of most of the aftershocks within the LOFS plus obtained focal mechanisms, indicate that this sequence had tectonic origin related to the re-activation of the LOFS. Further, a maximum seismogenic depth of about 15 km was determined for the entire region. Regarding area B, affected by a large megathrust earthquake in 2010, the study of moment tensor solutions for the sequence of aftershocks provided new insight into the distribution of postseismic activity relative to co-seismic slip and the release of seismic afterslip. Thrust aftershocks dominate the postseismic activity, but also normal faulting was detected in the outer-rise area and in the overriding plate near the coastline. The largest seismically released afterslip is located between the two main patches of co-seismic slip. Large aftershocks (M>4) occur along the megathrust interface, in zones of intermediate co-seismic slip associated to stress introduced on dislocation tips with high co-seismic slip contrast. On the other hand, smaller events (M<4) tend to occur in areas of large co-seismic slip, and might indicate a more diffuse distribution within the damage zone of the megathrust plane. It is likely that these smaller events are associated to secondary processes (fluid release, re-activation of secondary structures). Although belonging to the same subduction margin, the seismotectonics and earthquake patterns of the two areas investigated here show different underlying tectonic regimes. For the northern area, locus of the 2010 Mw 8.8 Chile earthquake, inter-plate thrust seismicity is dominant both in term of quantity of events and moment release. Conversely, the southern area presents only shallow intra-plate crustal seismicity mainly occurring in the arc, where Quaternary volcanism and the LOFS are present.
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McGowan, James Andrew. "Hercynian transpressional tectonics at the southern margin of the Central Iberian Zone, western Spain." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358641.

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Books on the topic "Southern margin"

1

Canada, Geological Survey of. Bathymetry: Southern Queen Charlotte Margin. S.l: s.n, 1987.

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Canada, Geological Survey of. Bathymetry: Southern Vancouver Island Margin. S.l: s.n, 1987.

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Canada, Geological Survey of. Acoustic Imagery: Southern Queen Charlotte Margin. S.l: s.n, 1987.

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Canada, Geological Survey of. Acoustic Imagery: Southern Vancouver Island Margin. S.l: s.n, 1987.

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Heggie, D. T. Continental margin transects: Geochemistry of surface sediments from the southern Australian continental margin including offshore west Tasmania, South Australia and Victoria : projects 121.13, 121.20 and 121.38. Canberra: Australian Geological Survey Organisation, 1993.

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H, Bahlburg, Breitkreuz Ch, and Giese P, eds. The Southern Central Andes: Contributions to structure and evolution of an active continental margin. Berlin: Springer-Verlag, 1988.

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Ibbeken, H. Source and sediment: A case study of provenance and mass balance at an active plate margin (Calabria, Southern Italy). Berlin: Springer-Verlag, 1991.

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Colwell, James B. Rig seismic research cruise 13: Structure and stratigraphy of the northeast Gippsland Basin and southern New South Wales margin : initial report. Canberra: Australian Govt. Pub. Service, 1987.

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Colwell, James B. Rig seismic research cruise 13: Structure and stratigraphy of the northeast Gippsland Basin and southern New South Wales margin : initial report. Canberra: Australian Government Publishing Service, 1987.

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Grout, Marilyn A. Fracture history of the Divide Creek and Wolf Creek anticlines and its relation to Laramide basin-margin tectonism, southern Piceance basin, northwestern Colorado. [Denver, CO]: U.S. Dept. of the Interior, Geological Survey, 1991.

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Book chapters on the topic "Southern margin"

1

Gravdal, A., H. Haflidason, and D. Evans. "Seabed and Subsurface Features on the Southern Vøring Plateau and Northern Storegga Slide Escarpment." In European Margin Sediment Dynamics, 111–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55846-7_18.

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Pace, Michelle. "Notions of “Europe”: Where Does Europe’s Southern Margin Lie?" In The Geopolitics of Europe's Identity, 159–75. New York: Palgrave Macmillan US, 2008. http://dx.doi.org/10.1057/9780230610323_9.

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Akhmetzhanov, A. M., N. H. Kenyon, M. K. Ivanov, A. J. Wheeler, P. V. Shashkin, and T. C. E. van Weering. "Giant Carbonate Mounds and Current-Swept Seafloors on the Slopes of the Southern Rockall Trough." In European Margin Sediment Dynamics, 203–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55846-7_33.

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Boyd, R., P. Williamson, and B. U. Haq. "Seismic Stratigraphy and Passive-Margin Evolution of the Southern Exmouth Plateau." In Sequence Stratigraphy and Facies Associations, 579–603. Oxford, UK: Blackwell Publishing Ltd., 2009. http://dx.doi.org/10.1002/9781444304015.ch29.

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Niencheski, Luis F. "Nutrient Transport, Cycles, and Fate in Southern Brazil (Southwestern Atlantic Ocean Margin)." In Plankton Ecology of the Southwestern Atlantic, 57–69. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77869-3_3.

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Jabaloy Sánchez, Antonio, José Alberto Padrón-Navarta, María Teresa Gómez-Pugnaire, Vicente López Sánchez-Vizcaíno, and Carlos J. Garrido. "Alpine Orogeny: Deformation and Structure in the Southern Iberian Margin (Betics s.l.)." In The Geology of Iberia: A Geodynamic Approach, 453–86. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11295-0_10.

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Bahlburg, Heinrich, M. Christina Moya, and Werner Zeil. "Geodynamic Evolution of the Early Palaeozoic Continental Margin of Gondwana in the Southern Central Andes of Northwestern Argentina and Northern Chile." In Tectonics of the Southern Central Andes, 293–302. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-77353-2_21.

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Mcginnis, John P., and Dennis E. Hayes. "The Roles of Downslope and Along-Slope Depositional Processes: Southern Antarctic Peninsula Continental Rise." In Geology and Seismic Stratigraphy of the Antarctic Margin, 141–56. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/ar068p0141.

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Sato, Hiroshi, and Teruaki Ishii. "Petrology and Mineralogy of Mantle Peridotites from the Southern Marianas." In Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin, 129–47. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8885-7_6.

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dos Reis, A. Tadeu, Cleverson G. Silva, Marcus A. Gorini, Rafael Leão, Nara Pinto, Rodrigo Perovano, Marcos V. M. Santos, Josefa V. Guerra, Izabel K. Jeck, and Ana Angélica A. Tavares. "The Chuí Megaslide Complex: Regional-Scale Submarine Landslides on the Southern Brazilian Margin." In Submarine Mass Movements and their Consequences, 115–23. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20979-1_11.

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Conference papers on the topic "Southern margin"

1

Gonçalves De Souza, K., R. L. Fontana, J. Mascle, J. M. Macedo, W. U. Mohriak, and K. Hinz. "The Southern Brazilian Margin: an Example of a South Atlantic Volcanic Margin." In 3rd International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609-pdb.324.1336.

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Parsiegla, N., K. Gohl, and G. Uenzelmann-Neben. "Geodynamic processes along the southern margin of Africa." In 10th SAGA Biennial Technical Meeting and Exhibition. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609-pdb.146.7.3.

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Thomas, William A. "TECTONIC EVOLUTION OF THE SOUTHERN MARGIN OF LAURENTIA." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-318647.

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Del Ben, A., and V. Volpi. "Deformation and Crustal Conditions of the Southern Tyrrhenian Margin." In 61st EAGE Conference and Exhibition. European Association of Geoscientists & Engineers, 1999. http://dx.doi.org/10.3997/2214-4609.201407988.

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Zuehlke, R., J. Contreras, S. Bowman, and T. Bechstaedt. "Integrated Numerical Modeling of the Southern Brazilian Continental Margin." In 74th EAGE Conference and Exhibition incorporating EUROPEC 2012. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20148192.

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Rodriguez, K., and N. Hodgson. "Source Rock De-Risking in the Southern Atlantic Margin." In First EAGE West Africa E&P Workshop. European Association of Geoscientists & Engineers, 2022. http://dx.doi.org/10.3997/2214-4609.2022626005.

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Contreras, J., R. Zühlke, S. Bowman, and T. Bechstädt. "Seismic Stratigraphy and Numerical Analysis of the Southern Brazilian Margin." In 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201401351.

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Rodriguez-Salgado, P., A. Vinyoles, O. Oms, E. Remacha, and J. Navarro. "Rifting and Transtension in the Southern Tethyan Margin - 3D Seismic Evidences from the Southern Alamein Basin (Egypt)." In 77th EAGE Conference and Exhibition 2015. Netherlands: EAGE Publications BV, 2015. http://dx.doi.org/10.3997/2214-4609.201413283.

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Corrêa, Thiago B. S., Cleverson G. Silva, and A. T. dos Reis. "Space-Time Evolution of the Marine Depocenters at the Pelotas Basin, Southern Brazilian Continental Margin." In 9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2005. http://dx.doi.org/10.1190/sbgf2005-189.

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B. S. Corrêa, Thiago, Cleverson G. Silva, and A. T. dos Reis. "Space-Time Evolution of the Marine Depocenters at the Pelotas Basin, Southern Brazilian Continental Margin." In 9th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.160.sbgf186.

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Reports on the topic "Southern margin"

1

Davis, E., R. Currie, and B. Sawyer. Bathymetry, southern Queen Charlotte Margin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/133928.

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Davis, E., R. Currie, and B. Sawyer. Bathymetry, southern Vancouver Island Margin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/133933.

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Davis, E., R. Currie, and B. Sawyer. Acoustic imagery, southern Queen Charlotte margin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/133936.

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Davis, E., R. Currie, and B. Sawyer. Acoustic imagery, southern Vancouver Island margin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/133941.

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Salad Hersi, O., and D. Lavoie. The Potsdam and Beekmantown groups, evolution of the shallow marine passive margin in southern Quebec. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2001. http://dx.doi.org/10.4095/212044.

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Gregersen, U., P. C. Knutz, G. K. Pedersen, H. Nøhr-Hansen, J. R. Ineson, L. M. Larsen, J R Hopper, et al. Stratigraphy of the West Greenland Margin. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321849.

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The stratigraphy and the geological evolution of the West Greenland margin from the Labrador Sea to Baffin Bay in both the onshore and offshore areas are described. The primary data sets include seismic reflection surveys, wells, and outcrops. In addition, seabed samples, seismic refraction and magnetic data, onshore and offshore maps, and stratigraphic compilations were used. The basins of the West Greenland continental margin are described in three regions from the south to the north: southern West Greenland basins, central West Greenland basins, and northern West Greenland basins. Each region includes a description of the stratigraphy and evolution from the Archean to the Quaternary, divided into six phases: pre-rift and early extension, early rift, subsidence and rifting, late rift, drift, and post-drift. Finally, the regions are correlated and described in a tectonostratigraphic context together with analogues from the Canadian conjugate margin.
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Orange, Daniel L. Seafloor Geomorphology, Gas & Fluid, and Slope Failure on the Southern Cascadia Continental Margin. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada629661.

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Moore, J. M. Nicola Horst, southern British Columbia: window into the pre-Triassic margin of North America? Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211139.

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Orange, Daniel L. Seafloor Geomorphology, Gas and Fluid Flow, and Slope Failure on the Southern Cascadia Continental Margin. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada628772.

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Trettin, H. P. Wisconsinan stratigraphy at northern margin of Strait of Georgia, southern Cortes Island and vicinity, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2004. http://dx.doi.org/10.4095/215671.

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