Journal articles: 'Geology Victoria Kanyapella Basin'

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Lisker, Frank, and Andreas L. Läufer. "The Mesozoic Victoria Basin: Vanished link between Antarctica and Australia." Geology 41, no. 10 (October 2013): 1043–46. http://dx.doi.org/10.1130/g33409.1.

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Holdgate, G. R., T. A. G. Smith, S. J. Gallagher, and M. W. Wallace. "Geology of coal-bearing Palaeogene sediments, onshore Torquay Basin, Victoria." Australian Journal of Earth Sciences 48, no. 5 (October 2001): 657. http://dx.doi.org/10.1046/j.1440-0952.2001.00888.x.

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Holdgate, G. R., T. A. G. Smith, S. J. Gallagher, and M. W. Wallace. "Geology of coal-bearing Palaeogene sediments, onshore Torquay Basin, Victoria." Australian Journal of Earth Sciences 48, no. 5 (October 2001): 657–79. http://dx.doi.org/10.1046/j.1440-0952.2001.485888.x.

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Holdgate, G. R., S. J. Gallagher, and M. W. Wallace. "Tertiary coal geology and stratigraphy of the Port Phillip Basin, Victoria." Australian Journal of Earth Sciences 49, no. 3 (June 2002): 437–53. http://dx.doi.org/10.1046/j.1440-0952.2002.00930.x.

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Lanigan, Kerrie-Anne. "Australia’s gas future: how Victoria can stay ahead of the pack." Proceedings of the Royal Society of Victoria 126, no. 2 (2014): 14. http://dx.doi.org/10.1071/rs14014.

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ExxonMobil is proud to be a major conventional gas supplier into the Victorian market. The Gippsland Basin Joint Venture, which ExxonMobil operates on behalf of ourselves and BHP Billiton, currently supplies nearly 40% of east coast Australian domestic gas demand. It has produced almost two-thirds of oil and 30% of Australia’s gas production. Since natural gas was first produced from the Gippsland Basin in the late 1960s, the positive attributes of natural gas have been well recognised in Victoria. The use of gas has spread from cooking and heating in the home, to becoming an important source of energy to fuel manufacturing, industry and power generation. To facilitate the growing use of gas, we have seen new pipelines constructed to expand the reach of natural gas to new markets and to interconnect the major demand centres. As demand has grown, new supplies have also entered the market.

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Rose, Marion, Yi Zeng, and Mark Dransfield. "Applying FALCON® gravity gradiometry to hydrocarbon exploration in the Gippsland Basin, Victoria." Exploration Geophysics 37, no. 2 (June 2006): 180–90. http://dx.doi.org/10.1071/eg06180.

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Eglington, Col. "Marine Ostracoda (Crustacea) from the Late Oligocene Gellibrand Marl, Otway Basin, Victoria, Australia." Proceedings of the Royal Society of Victoria 131, no. 2 (2019): 53. http://dx.doi.org/10.1071/rs19009.

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A subsurface sample from Heywood-10 borehole, Otway Basin, Victoria, has provided the first ostracod assemblage of Oligocene age from the Gellibrand Marl (Heytesbury Group). Previous Gellibrand Marl ostracod assemblages were Miocene. This Late Oligocene assemblage of 384 specimens includes 50 species and subspecies from 34 genera across 18 families; 24 taxa are placed in open nomenclature. Of the taxa discussed, several appear to be new species but with too few specimens for them to be described as such. The reciprocal of Simpson’s Diversity Index was applied to assist assemblage comparisons. The Gellibrand Marl assemblage is larger, contains more families, genera and taxa but is less diverse than a smaller assemblage from the Early Oligocene Narrawaturk Formation (Nirranda Group) at the same location, and more diverse than an assemblage from the Early Oligocene/Ruwarung Member, South Australia. There are notable differences in the dominant taxa present in each assemblage. In the Gellibrand Marl, Pontocyprididae predominate; in Narrawaturk Formation, Cytheruridae and Xestoliberididae are most abundant; and in the South Australian assemblage, Bairdiidae by far the most numerous. This Gellibrand Marl collection has the characteristics of an at least partly allocthanous assemblage, the habitat a well-oxygenated mid-shelf environment. No cold or deep-water taxa are present.

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Gunn, P. J., J. Mitchell, T. Mackey, and D. Cathro. "Evolution and Structuring of the Offshore Otway Basin, Victoria as Delineated by Aeromagnetic Data." Exploration Geophysics 26, no. 2-3 (June 1, 1995): 303–8. http://dx.doi.org/10.1071/eg995262.

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BESTLAND, E. A. "A Miocene Gilbert-type fan-delta from a volcanically influenced lacustrine basin, Rusinga Island, Lake Victoria, Kenya." Journal of the Geological Society 148, no. 6 (November 1991): 1067–78. http://dx.doi.org/10.1144/gsjgs.148.6.1067.

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Unverfärth, Jan, Thomas Mörs, and Benjamin Bomfleur. "Palynological evidence supporting widespread synchronicity of Early Jurassic silicic volcanism throughout the Transantarctic Basin." Antarctic Science 32, no. 5 (July 7, 2020): 396–97. http://dx.doi.org/10.1017/s0954102020000346.

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Throughout the Transantarctic Mountains, Early Jurassic silicic magmatism preceding the emplacement of the Ferrar flood-basalt province (Heimann et al. 1994) is documented by the increasing input of silicic ash into otherwise epiclastic, fluviolacustrine deposits of the Beacon Supergroup (see Elliot et al. 2017). Vertebrate biostratigraphy and radiometric analyses indicate a Sinemurian to Pliensbachian age span for silicic volcaniclastic deposits in the central Transantarctic Mountains (CTMs) (Elliot et al. 2017). For northern Victoria Land (NVL), radiometric geochronology and palynostratigraphy revealed that explosive silicic volcanism began with minor pulses during the early Sinemurian (c. 195 Ma) and reached a peak phase beginning in the middle Pliensbachian (c. 187 Ma) (Bomfleur et al. 2014). A basin-wide correlation of these widely separated age frameworks has so far been hampered by the scarcity of data on coeval deposits in southern Victoria Land (SVL). Here, we present new palynostratigraphic data from mixed epiclastic–volcaniclastic deposits in the Prince Albert Mountains that provide supporting evidence for the widespread synchronicity of silicic volcanic episodes preceding Ferrar magmatism.

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Bomfleur, Benjamin, Thomas Mörs, Jan Unverfärth, Feng Liu, Andreas Läufer, Paula Castillo, Changhwan Oh, Tae-Yoon S. Park, Jusun Woo, and Laura Crispini. "Uncharted Permian to Jurassic continental deposits in the far north of Victoria Land, East Antarctica." Journal of the Geological Society 178, no. 1 (September 15, 2020): jgs2020–062. http://dx.doi.org/10.1144/jgs2020-062.

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The remote lower reaches of the Rennick Glacier in the far north of Victoria Land hold some of the least-explored outcrop areas of the Transantarctic basin system. Following recent international field-work efforts in the Helliwell Hills, we here provide a comprehensive emendation to the regional stratigraphy. Results of geological and palaeontological reconnaissance and of petrographic, geochemical and palynostratigraphic analyses reveal a stack of three previously unknown sedimentary units in the study area: the Lower Triassic Van der Hoeven Formation (new unit, 115+ m thick) consists mainly of quartzose sandstone and non-carbonaceous mudstone rich in continental trace fossils. The Middle to Upper Triassic Helliwell Formation (new unit, 235 m thick) consists of coal-bearing overbank deposits and volcaniclastic sandstone and yielded typical plant fossils of the Gondwanan Dicroidium flora together with plant-bearing silicified peat. The succession is capped by c. 14 m of the sandstone-dominated Section Peak Formation (uppermost Triassic–Lower Jurassic). Our results enable more detailed correlation of the Palaeozoic–Mesozoic successions throughout East Antarctica and into Tasmania. Of particular interest is one section that spans the end-Permian mass extinction interval, which promises to allow detailed reconstructions of high-latitude vegetation dynamics across this critical interval in Earth history.Supplementary material: A Supplementary Data File containing supplementary information, figures S1–S7, and additional references is available at https://doi.org/10.6084/m9.figshare.c.5118431

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Pettifer, G., A. Tabassi, and B. Simons. "A NEW LOOK AT THE STRUCTURAL TRENDS IN THE ONSHORE OTWAY BASIN, VICTORIA, USING IMAGE PROCESSING OF GEOPHYSICAL DATA." APPEA Journal 31, no. 1 (1991): 213. http://dx.doi.org/10.1071/aj90016.

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Although the Otway Basin is oriented west-north-westerly, and previously recognised major structural elements follow a similar trend, other structural trends have been found on recently obtained geophysical data.In 1989, an aeromagnetic and radiometric survey of the onshore Otway Basin was completed for the Victorian Department of Industry and the Bureau of Mineral Resources, Geology and Geophysics. This survey, together with a recent gravity compilation by the Geological Survey of Victoria, enables analysis of magnetic and gravity data trends reflecting basement and intra-basin structure.The trend analysis was carried out using modern image processing techniques including simulation of real-time sun-angles of the magnetic and gravity data, and composite images of the radiometric data, to highlight lineaments. This technology enables integration of magnetic, gravity, radiometric and, potentially, seismic, Landsat, topography and bathymetry data for basin structure analysis.The magnetic, gravity and radiometric trend analysis was compared to an earlier Landsat study (Baker, 1980) and a previous seismic data compilation of the Otway Basin (Megallaa, 1986).The present study has revealed the significance of major early Palaeozoic north-south and east-north-east to easterly trends. The latter trends have not previously been identified or discussed in earlier basin reviews. There appears to be a difference between trends reflected in the radiometric and seismic data and trends apparent in the gravity and magnetic data. This could indicate a change in principal stress directions during the evolution of the basin. The shape of the northern margin of the basin appears to be controlled by major north-easterly structures.

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Collins, C. D. N., J. P. Cull, J. B. Willcox, and J. B. Colwell. "A long-offset seismic reflection and refraction study of the Gippsland and Bass Basins from onshore recording of a marine air-gun source." Exploration Geophysics 20, no. 2 (1989): 293. http://dx.doi.org/10.1071/eg989293.

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Seismic refraction data were obtained for the Bass and Gippsland Basins during the 1988 cruise of the BMR research vessell "Rig Seismic". Seismic recorders were deployed on land by BMR and Monash University to record long-offset wide-angle reflection and refraction data using the ship's air-guns as the energy source. Preliminary results have now been obtained from these data providing information on deep crustal structure related to the basin formation. Two crustal layers have been detected with velocities of 4.5 km/s increasing to 7.4 km/s (unreversed) at depths exceeding 20 km. Additional data have now been obtained over a traverse length of 170 km to provide constraints on the deep structure of Bass Strait and the Lachlan Fold Belt in Victoria and Tasmania.

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Cook, Y. A. "Precambrian rift-related magmatism and sedimentation, south Victoria Land, Antarctica." Antarctic Science 19, no. 4 (August 16, 2007): 471–84. http://dx.doi.org/10.1017/s0954102007000612.

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AbstractPrecambrian continental extension is described in detail for the first time in the Victoria Land segment of the Transantarctic Mountains and is comparable with plume related intercontinental rifting of the Afar area, Africa. The Baronick Formation comprises igneous-derived conglomerate, marble and volcanic to sub-volcanic igneous layers. Volcanic and carbonate horizons were eroded in a fluvial or marine environment and provided debris for mass flow and slump deposits which formed in a marginal marine basin in the Precambrian. Clasts in these deposits include basalt, trachyte and comendite, and along with the interbedded volcanic layers of basalt, trachyte and quartz syenite, indicate proximity and contemporaneity of volcanic activity. Igneous layers and source rocks for clasts of the Baronick Formation have an enriched MORB chemistry and underwent albitization of calcic feldspar before erosion and conglomerate deposition. The Highway Suite forms a kilometre-scale body of gabbro and dolerite plugs and is interpreted as a slice of transitional continental oceanic crust. The chemistry of all igneous rocks suggests a continental rift environment and the associated sediments are consistent with such a setting. The Baronick Formation was locally intruded by sills of the Highway Suite; however, the main body of the Highway Suite was juxtaposed against the Baronick Formation during greenschist facies shearing before c. 551 Ma.

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Weihaupt, John G., Frans G. Van Der Hoeven, Claude Lorius, and Frederick B. Chambers. "Origin(s) of Antarctica's Wilkes Subglacial Basin." Antarctic Science 26, no. 4 (December 16, 2013): 377–83. http://dx.doi.org/10.1017/s0954102013000746.

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AbstractThe Wilkes Subglacial Basin (WSB), the largest subglacial basin in East Antarctica, is a topographic depression of continental proportions that lies beneath the East Antarctic continental ice sheet. Discovered by the US Victoria Land Traverse 1959–60, the origin of the WSB and the influence of palaeoclimate on its overlying continental ice sheet have remained uncertain since the time of its discovery. Most explanations of origin favour lithospheric structural control as a function of tectonic activity. Lithospheric flexure due to thermally or isostatically induced uplift of the Transantarctic Mountains was suggested in the 1980s. Lithospheric extension and rifting was proposed in the 1990s. More recent investigations have revealed the presence of fold and thrust belts, casting doubt on flexural and extensional hypotheses as the primary mechanisms, suggesting instead a compressional scenario. While remaining inconclusive, these tectonic mechanisms in one form or another, or in combination, are now believed to have provided the structural control for the origin of the WSB. Not yet comprehensively examined, however, is the role of non-tectonic processes in the formation of the WSB, as they may have influenced the size, configuration, subglacial sedimentation and subglacial topography of the WSB. In this paper we review the tectonic hypotheses and examine post-tectonic climate change along with glacial and marine processes as potentially significant factors in the present condition and configuration of the WSB. In the process, we find that there are a number of features not included in previous investigations that may have been major factors in the modification of the subglacial basin.

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Stacey, Andrew, Cameron Mitchell, Goutam Nayak, Heike Struckmeyer, Michael Morse, Jennie Totterdell, and George Gibson. "Geology and petroleum prospectivity of the deepwater Otway and Sorell basins: new insights from an integrated regional study." APPEA Journal 51, no. 2 (2011): 692. http://dx.doi.org/10.1071/aj10072.

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The frontier deepwater Otway and Sorell basins lie offshore of southwestern Victoria and western Tasmania at the eastern end of Australia’s Southern Rift System. The basins developed during rifting and continental separation between Australia and Antarctica from the Cretaceous to Cenozoic. The complex structural and depositional history of the basins reflects their location in the transition from an orthogonal–obliquely rifted continental margin (western–central Otway Basin) to a transform continental margin (southern Sorell Basin). Despite good 2D seismic data coverage, these basins remain relatively untested and their prospectivity poorly understood. The deepwater (> 500 m) section of the Otway Basin has been tested by two wells, of which Somerset–1 recorded minor gas shows. Three wells have been drilled in the Sorell Basin, where minor oil shows were recorded near the base of Cape Sorell–1. As part of the federal government-funded Offshore Energy Security Program, Geoscience Australia has acquired new aeromagnetic data and used open file seismic datasets to carry out an integrated regional study of the deepwater Otway and Sorell basins. Structural interpretation of the new aeromagnetic data and potential field modelling provide new insights into the basement architecture and tectonic history, and highlights the role of pre-existing structural fabric in controlling the evolution of the basins. Regional scale mapping of key sequence stratigraphic surfaces across the basins, integration of the regional structural analysis, and petroleum systems modelling have resulted in a clearer understanding of the tectonostratigraphic evolution and petroleum prospectivity of this complex basin system.

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Wolter, P. J., and P. L. Harrison. "Amplitude with Offset and Direct Hydrocarbon Indicators Enable Mapping of Gas Reservoirs in the Golden Beach, Baleen and Patricia Fields, Gippsland Basin, Victoria." Exploration Geophysics 19, no. 1-2 (March 1988): 205–13. http://dx.doi.org/10.1071/eg988205.

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Ntinyari, Winnie, Joseph Gweyi-Onyango, Mekonnen Giweta, Benson Mochoge, James Mutegi, Generose Nziguheba, and Cargele Masso. "Nitrogen use efficiency trends for sustainable crop productivity in Lake Victoria basin: smallholder farmers’ perspectives on nitrogen cycling." Environmental Research Communications 4, no. 1 (January 1, 2022): 015004. http://dx.doi.org/10.1088/2515-7620/ac40f2.

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Abstract Nitrogen Use Efficiency (NUE) is one of the established metrics for benchmarking management of Nitrogen (N) in various systems. Numerous approaches to calculate NUE exist, making it difficult to compare the performances of systems depending on the methodology used. This study adopted the conceptualized framework by European Union Nitrogen Expert Panel (EUNEP) to calculate NUE values for cereal crops to determine future trends for the first time in the Lake Victoria region. Data were collected through in-person interviews among maize and rice smallholder farmers within the Lake Victoria region. A total of 293 observations were recorded. Collected data on yield and N fertilizer were used to make projections on the changes of NUE based on scientific and policy recommendations for Sub-Saharan Africa for 2020 (base year), 2025, 2030, and 2050. Significant differences in maize grain yield for both fertilized and unfertilized farms were observed with very low yields of 2.4 t ha−1 (fertilized) and 1.4 t ha−1 (unfertilized). The graphical representation of NUE of both maize and rice showed that most farmers were in the zone of soil N mining. Projected results showed that most maize farmers within Lake Victoria region will continue to experience NUE values >90%, low N inputs <50 kg N ha−1) and less than 5 t ha−1 maize crop yield over the years. For rice farmers, Nyando and Nzoia catchments had surpassed the set target of both yield (6 t ha−1) and N input (50 kg N ha−1). However, NUE values remain higher than the optimal ranges of 50%–90% (127.14%−267.57%), indicating risks of depleting soil N status. The unbalanced N fertilization also showed a trend below the linear neutrality option and the average N output for good N management for both crops. Therefore, farmers need to explore various crop management options that could increase N use efficiencies. This should be coupled with policies that promote farmers to access more N input and advocate for optimal management of N and improved quality of the cereals.

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Zanutta, Antonio, Monia Negusini, Luca Vittuari, Leonardo Martelli, Paola Cianfarra, Francesco Salvini, Francesco Mancini, et al. "Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model." Remote Sensing 13, no. 1 (December 29, 2020): 87. http://dx.doi.org/10.3390/rs13010087.

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In Antarctica, the severe climatic conditions and the thick ice sheet that covers the largest and most internal part of the continent make it particularly difficult to systematically carry out geophysical and geodetic observations on a continental scale. It prevents the comprehensive understanding of both the onshore and offshore geology as well as the relationship between the inner part of East Antarctica (EA) and the coastal sector of Victoria Land (VL). With the aim to reduce this gap, in this paper multiple geophysical dataset collected since the 1980s in Antarctica by Programma Nazionale di Ricerche in Antartide (PNRA) were integrated with geodetic observations. In particular, the analyzed data includes: (i) Geodetic time series from Trans Antarctic Mountains DEFormation (TAMDEF), and Victoria Land Network for DEFormation control (VLNDEF) GNSS stations installed in Victoria Land; (ii) the integration of on-shore (ground points data and airborne) gravity measurements in Victoria Land and marine gravity surveys performed in the Ross Sea and the narrow strip of Southern Ocean facing the coasts of northern Victoria Land. Gravity data modelling has improved the knowledge of the Moho depth of VL and surrounding the offshore areas. By the integration of geodetic and gravitational (or gravity) potential results it was possible to better constrain/identify four geodynamic blocks characterized by homogeneous geophysical signature: the Southern Ocean to the N, the Ross Sea to the E, the Wilkes Basin to the W, and VL in between. The last block is characterized by a small but significant clockwise rotation relative to East Antarctica. The presence of a N-S to NNW-SSE 1-km step in the Moho in correspondence of the Rennick Geodynamic Belt confirms the existence of this crustal scale discontinuity, possibly representing the tectonic boundary between East Antarctica and the northern part of VL block, as previously proposed by some geological studies.

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Beverly, Emily J., Steven G. Driese, Daniel J. Peppe, Cara R. Johnson, Lauren A. Michel, J. Tyler Faith, Christian A. Tryon, and Warren D. Sharp. "Recurrent spring-fed rivers in a Middle to Late Pleistocene semi-arid grassland: Implications for environments of early humans in the Lake Victoria Basin, Kenya." Sedimentology 62, no. 6 (May 19, 2015): 1611–35. http://dx.doi.org/10.1111/sed.12199.

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Dunning, G. R. "Geology of the Annieopsquotch Complex, southwest Newfoundland." Canadian Journal of Earth Sciences 24, no. 6 (June 1, 1987): 1162–74. http://dx.doi.org/10.1139/e87-112.

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The Annieopsquotch Complex is an ophiolite that forms the Annieopsquotch Mountains of southwest Newfoundland. It contains rocks of the critical zone, gabbro zone (2.3 km thick), sheeted dyke zone (1.5 km thick), and pillow lava zone of a typical ophiolite. The zones trend northeast, face and dip southeast at approximately 50–70°, and are offset by faults.Cumulate rocks of the critical zone preserve graded layers, trough structures, and slump folds and locally are metamorphosed and deformed. The gabbro zone contains many textural varieties of gabbro, pegmatitic pods, layering, trondhjemite pods, and amphibolite near the base. It passes through a transition zone to a sheeted dyke zone that extends the full strike length of the ophiolite. Dykes trend northwest and are aphyric or plagioclase-phyric diabase. The pillow lava zone, besides pillow basalt, contains minor pillow breccia, hyaloclastite, and chert.The Annieopsquotch Complex is faulted against an Ordovician tonalite terrane to the northwest across the Lloyds River Fault and against the Victoria Lake Group to the southeast. It is cut by dykes and sills correlated with both these units. The complex is cut by two Late Ordovician gabbro–diorite intrusions and a granite of presumed Devonian age and is unconformably overlain by Early Silurian terrestrial sedimentary and volcanic rocks.Major-, trace-element, and clinopyroxene chemistry of the complex and other ophiolitic fragments between Buchans and King George IV Lake is typical of N-type MORB. These likely constituted one allochthon of Iapetus Ocean or marginal basin crust emplaced over the Ordovician continental margin of North America during the Taconic Orogeny.

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Finocchiaro, Furio, Carlo Baroni, Ester Colizza, and Roberta Ivaldi. "Pre-LGM open-water conditions south of the Drygalski Ice Tongue, Ross Sea, Antarctica." Antarctic Science 19, no. 3 (July 13, 2007): 373–77. http://dx.doi.org/10.1017/s0954102007000430.

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AbstractA marine sediment core collected from the Nordenskjold Basin, to the south of the Drygalski Ice Tongue, provides new sedimentological and chronological data for reconstructing the Pleistocene glacial history and palaeoenvironmental evolution of Victoria Land. The core consists of an over consolidated biogenic mud covered with glacial diamicton; Holocene diatomaceous mud lies on top of the sequence. Radiocarbon dates of the acid insoluble organic matter indicate a pre-Last Glacial Maximum age (>24kyr) for the biogenic mud at the base of the sequence. From this we can presume that at least this portion of the western Ross Sea was deglaciated during Marine Isotope Stage 3 and enjoyed open marine conditions. Our results are consistent with recent findings of pre-Holocene raised beaches at Cape Ross and in the Terra Nova Bay area.

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Gardner, Christopher B., and W. Berry Lyons. "Modelled composition of cryogenically produced subglacial brines, Antarctica." Antarctic Science 31, no. 3 (March 29, 2019): 165–66. http://dx.doi.org/10.1017/s095410201900004x.

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Polar subglacial hydrologic systems have garnered much interest since the recognition of Lake Vostok in 1996. In Antarctica, these environments are hydrologically diverse, including isolated lakes of different sizes, river–lake flow-through systems, “swamps” and groundwater (Siegert 2016). The refreezing of subglacial meltwater is also an important process beneath a large portion of the East Antarctic Ice Sheet (Bell et al. 2011). As subglacial water refreezes it exsolves salts, potentially leaving behind saline and hypersaline brines. Brines thought to derive from this cryoconcentration process have been observed in the northern polar permafrost regions and in the McMurdo Dry Valleys (MDVs) region of Antarctica. Additionally, sediments in the Victoria Land Basin have diagenetic signatures produced by brine movement dating from 3–11 m.y.a, suggesting hypersaline brines have existed in the McMurdo region since at least this time (Staudigel et al. 2018).

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Damaske, D., J. Behrendt, A. McCafferty, R. Saltus, and U. Meyer. "Transfer faults in the western Ross Sea: new evidence from the McMurdo Sound/Ross Ice Shelf aeromagnetic survey (GANOVEX VI)." Antarctic Science 6, no. 3 (September 1994): 359–64. http://dx.doi.org/10.1017/s0954102094000556.

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Aeromagnetic data collected on the GANOVEX IV and GANOVEX VI expeditions are combined in this report to give a synoptic view of the western Ross Sea, Antarctica. The addition of the new GANOVEX VI data allows the identification of the southern boundary of the “Ross Sea Unit” — a magnetic unit containing rift-fabric anomalies of the West Antarctic rift system in the Victoria Land basin. Although this boundary has a similar WSW–ENE orientation to the northern boundary, as identified in the GANOVEX IV survey, the newly identified southern magnetic unit (called the “Ross Island and Ice Shelf Edge Unit”) includes evidence of the S–N rift-fabric that is not found in the north, i.e. the rift-fabric continues farther south. The linear boundaries themselves are interpreted as transfer faults as proposed by previous workers for the tectonic development of the Ross Sea area.

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Savage, Jeni E., Margaret A. Bradshaw, and Kari N. Bassett. "Marginal marine depositional setting and correlation of the Devonian Sperm Bluff Formation (Taylor Group), southern Victoria Land, Antarctica." Antarctic Science 25, no. 6 (April 16, 2013): 767–90. http://dx.doi.org/10.1017/s0954102013000205.

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AbstractAnalysis of conglomerates and sandstones of the Sperm Bluff Formation at the base of the Taylor Group (Devonian) between the Mackay Glacier and Bull Pass provides new insights into the nature of initial coarse-grained deposition on basement along the northern side of the McMurdo sedimentary basin. Six lithofacies are recognized in the Sperm Bluff Formation: conglomerate lithofacies, pebbly sandstone lithofacies, cross-bedded sandstone lithofacies, low-angle cross-stratified sandstone lithofacies, bioturbated sandstone lithofacies and interbedded siltstone/sandstone lithofacies. Sedimentary environments ranged from wave-dominated delta, estuary or lagoon to shoreface and inner shelf. The assemblage is thought to reflect changes in sea level. Rhyolite is the most abundant clast type in the coarse lithofacies, but is unknown in outcrop in southern Victoria Land. The rhyolites correlate in age and geochemistry with Cambrian granites in the basement. Coarse beds also contain numerous quartzite clasts, probably derived from the late Precambrian Skelton Group. Palaeocurrents on Mount Suess indicate a strong unimodal flow to the west, but other sites show polymodal palaeoflow. The Sperm Bluff Formation is correlated with Terra Cotta Siltstone, New Mountain Sandstone and Altar Mountain formations based on the lithology of sandstones and their ichnology. A northward onlap during the Early Devonian is indicated.

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Blegen, Nick, J. Tyler Faith, and Daniel J. Peppe. "Tephrostratigraphy of the eastern Lake Victoria Basin including the Nyanza Rift, Kenya: Building a stratigraphic and chronological framework for modern human evolution." Quaternary Science Reviews 256 (March 2021): 106823. http://dx.doi.org/10.1016/j.quascirev.2021.106823.

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Wagner, Bernd, Sabrina Ortlepp, Peter T. Doran, Fabien Kenig, Martin Melles, and Andy Burkemper. "The Holocene environmental history of Lake Hoare, Taylor Valley, Antarctica, reconstructed from sediment cores." Antarctic Science 23, no. 3 (February 16, 2011): 307–19. http://dx.doi.org/10.1017/s0954102011000125.

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AbstractUp to 2.3 m long sediment sequences were recovered from the deepest part of Lake Hoare in Taylor Valley, southern Victoria Land, Antarctica. Sedimentological, biogeochemical, and mineralogical analyses revealed a high spatial variability of these parameters in Lake Hoare. Five distinct lithological units were recognized. Radiocarbon dating of bulk organic carbon samples from the sediment sequences yielded apparently too old ages and significant age reversals, which prevented the establishment of reliable age-depth models. However, cross correlation of the sedimentary characteristics with those of sediment records from neighbouring Lake Fryxell indicates that the lowermost two units of the Lake Hoare sediment sequences were probably deposited during the final phase of proglacial Lake Washburn, which occupied Taylor Valley during the late Pleistocene and early Holocene. High amounts of angular gravel and the absence of fine-grained material imply a complete desiccation with subaerial conditions in the Lake Hoare basin in the middle of the Holocene. The late Holocene (< c. 3300 calendar yr bp) is characterized by the establishment of environmental conditions similar to those existing today. A late Holocene desiccation event, such as proposed in former studies, is not indicated in the sediment sequences recovered.

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Weihaupt, John G., Frans G. Van Der Hoeven, Frederick B. Chambers, Claude Lorius, John W. Wyckoff, and Devin Castendyk. "The Wilkes Land Anomaly revisited." Antarctic Science 27, no. 3 (January 14, 2015): 291–305. http://dx.doi.org/10.1017/s0954102014000789.

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AbstractThe Wilkes Land Gravity Anomaly, first reported in 1959–60, is located in northern Victoria Land in the Pacific Ocean sector of East Antarctica, 1400 km west of the Ross Sea and centred at 70°00'S-140°00'E. Initially described on the basis of ground-based seismic and gravity survey, and estimated at the time to have a diameter of 243 km, the original data are now supplemented by data from airborne radiosound survey, airborne gravity survey, airborne magnetic survey and satellite remote sensing. These new data enable us to expand upon the original data, and reveal that the structure has a diameter of some 510 km, is accompanied by ice streams and a chaotically disturbed region of the continental ice sheet, has a subglacial topographical relief of ≥1500 m, and exhibits a negative free air gravity anomaly associated with a larger central positive free air gravity anomaly. The feature has been described as a volcanic structure, an igneous intrusion, an ancient igneous diapir, a subglacial sedimentary basin, a glacially eroded subglacial valley, a tectonic feature and a meteorite impact crater. We re-examine the feature on the basis of these collective data, with emphasis on the free air gravity anomaly signs, magnitudes and patterns, magnetic signature magnitudes and patterns, and the size, shape, dimensions and morphology of the structure. This enhanced view adds substantially to the original description provided at the time of discovery, and suggests several explanations for the origin of the Wilkes Land Anomaly. However, the importance of this feature lies not only in determining its origin but by the fact that this part of the Wilkes Subglacial Basin is one of the most prominent regional negative geoid and associated gravity anomalies of the Antarctic continent.

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Adams, C. J., J. D. Bradshaw, and T. R. Ireland. "Provenance connections between late Neoproterozoic and early Palaeozoic sedimentary basins of the Ross Sea region, Antarctica, south-east Australia and southern Zealandia." Antarctic Science 26, no. 2 (July 18, 2013): 173–82. http://dx.doi.org/10.1017/s0954102013000461.

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AbstractThick successions of turbidites are widespread in the Ross–Delamerian and Lachlan orogens and are now dispersed through Australia, Antarctica and New Zealand. U-Pb detrital zircon age patterns for latest Precambrian, Cambrian and Ordovician metagreywackes show a closely related provenance. The latest Neoproterozoic–early Palaeozoic sedimentary rocks have major components, at c. 525, 550, and 595 Ma, i.e. about 40–80 million years older than deposition. Zircons in these components increase from the Neoproterozoic to Ordovician. Late Mesoproterozoic age components, 1030 and 1070 Ma, probably originate from igneous/metamorphic rocks in the Gondwanaland hinterland whose exact locations are unknown. Although small, the youngest zircon age components are coincident with estimated depositional ages suggesting that they reflect contemporaneous and minor, volcanic sources. Overall, the detrital zircon provenance patterns reflect the development of plutonic/metamorphic complexes of the Ross–Delamerian Orogen in the Transantarctic Mountains and southern Australia that, upon exhumation, supplied sediment to regional scale basin(s) at the Gondwana margin. Tasmanian detrital zircon age patterns differ from those seen in intra-Ross Orogen sandstones of northern Victoria Land and from the oldest metasediments in the Transantarctic Mountains. A comparison with rocks from the latter supports an allochthonous western Tasmania model and amalgamation with Australia in late Cambrian time.

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Carpenter, Chris. "Inversion of Full Waveform Sonic Data Assists Calibration of Geomechanics Model." Journal of Petroleum Technology 73, no. 09 (September 1, 2021): 39–40. http://dx.doi.org/10.2118/0921-0039-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 202260, “Inversion of Advanced Full Waveform Sonic Data Provides Magnitudes of Minimum and Maximum Horizontal Stress for Calibrating the Geomechanics Model in a Gas Storage Reservoir,” by Zachariah J. Pallikathekathil, SPE, Xing Wang Yang, and Saeed Hafezy, Schlumberger, et al., prepared for the 2020 SPE Asia Pacific Oil and Gas Conference and Exhibition, originally scheduled to be held in Perth, Australia, 20–22 October. The paper has not been peer reviewed. In 1D geomechanics projects, calibration of stress is extremely important in the construction of a valid mechanical earth model (MEM). The effective minimum horizontal stress (Shmin) data usually are available from traditional measurements, but these have a few deficiencies. The complete paper presents a technique for deriving stresses in which the radial variation of acoustic velocity from an advanced dipole sonic logging tool is inverted to obtain stress. These derived stresses are then used to calibrate the 1D MEM for a gas storage field. Regional Geology The field is in the Otway Basin in Western Victoria. Gas is trapped in the Late Cretaceous Waarre formation at depths between 1155 and 1200 m subsea. The reservoir is sealed by the overlying marine Belfast mudstone, which is the common seal in the stratigraphy across the onshore Otway Basin. The reservoir has excellent reservoir quality and has proved ideal for gas storage. Challenge Posed by the 1D MEM Challenge Posed by the 1D MEM Well 1 was recently drilled in the basin. A 1D MEM - a numerical representation of the geomechanical properties and stress state of the earth at any depth - was planned to be constructed to obtain the current-day far-field principal stresses (Shmin), effective maximum horizontal stress (SHmax), and effective vertical stress (SV)] in the Belfast and Waarre formations. Understanding the stress field was important, especially in the caprock (Belfast) and in the reservoir (Waarre) so that the pressure limits for safe gas-storage operation could be defined better. However, for a variety of reasons, no conventional stress measurements were available to calibrate the modeled stress in the 1D MEM. Without any calibration of the stress, the geomechanics model would feature high uncertainty to be used to define the pressure operational limits for gas-storage operation. Fortunately, a new wireline sonic tool was recorded in the reservoir section and the overburden sections of the borehole in Well 1. A quick dispersion analysis of the waveforms showed that the Paaratte formation, above the Belfast formation, was acoustically stress-sensitive and that advanced processing could be performed to invert the acoustic information to stress values.

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Lemenkova, Polina. "Data-driven insights into correlation among geophysical setting, topography and seafloor sediments in the Ross Sea, Antarctic." Caderno de Geografia 31, no. 64 (December 9, 2020): 1. http://dx.doi.org/10.5752/p.2318-2962.2021v31n64p1.

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Detailed mapping based on the high-resolution grids, such as GEBCO, ETOPO1, GlobSed, EGM-2008 is crucial for various domains of Earth sciences: geophysics, glaciology, Quaternary, sedimentology, geology, environmental science, geomorphology, etc. The study presented a GMT-based scripting techniques of the cartographic data processing aimed at the comparative analysis of the bathymetry, sediment thickness, geologic objects and geophysical settings in the study area based on various datasets. The study area is located in the Ross Sea, Antarctic. The highest values of the sediment thickness over 7,500 m are dominating in the southwest segment of the Ross Sea closer to the Victoria Land, followed by the region over the Ross Ice Shelf with values between 5,500 to 7,000 m (170°-175°W). The increased sediment thickness (2,500 to 3,000 m) was also mapped seen in the region NE off the Sulzberger Bay (70-75°S to 140-155°W), caused by the closeness of the Marie Bird Land ice coasts. A remarkable correlation between the gravity and the topography of the sea-land border in the Marie Bird Land area is well reflected in the coastal line and a set of the higher values in the free-air gravity. On the contrary, negative values (–60 to -80 mGal) are notable along the submarine toughs stretching parallel in the western part of the basin: e.g. the trough stretching in NW-SE direction in the 170°W-175°E, 65°S-68°S, between the 167°W-175°W, 70°S-72°S. Such correlations are clearly visible on the map, indicating geological lineaments and bathymetric depressions correlating with gravity grids. The paper contributes to the regional studies of the Ross Sea, the Antarctic and Polar region, and development of the cartographic technical methodologies by presenting an application of the GMT for thematic mapping.

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SCHOLZ, CHRISTOPHER A., Rosenstiel. "Abstract: Evolution of the Lake Victoria Basin, East Africa." AAPG Bulletin 82 (1998). http://dx.doi.org/10.1306/00aa946c-1730-11d7-8645000102c1865d.

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Barry G. West, Geoff Collins. "A Reappraisal of the Petroleum Prospectivity of the Torquay Sub-basin, Offshore Southern Victoria, Australia: ABSTRACT." AAPG Bulletin 80 (1996). http://dx.doi.org/10.1306/522b4023-1727-11d7-8645000102c1865d.

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Efthimia Papastavros1, Richard M. K. "ABSTRACT: High TOC Values in Sedimentary Rocks of the Victoria Land Basin (Ross Sea, Antarctica) Mark the Initiation of Glacial Advances." AAPG Bulletin 86 (2002). http://dx.doi.org/10.1306/3fef472b-1741-11d7-8645000102c1865d.

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Stemmerik, Lars, Martin Sønderholm, and Jørgen A. Bojesen-Koefoed. "Palaeo-oil field in a Silurian carbonate buildup, Wulff Land, North Greenland: project ‘Resources of the sedimentary basins of North and East Greenland’." GEUS Bulletin, June 1, 1997, 24–28. http://dx.doi.org/10.34194/ggub.v176.5056.

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NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Stemmerik, L., Sønderholm, M., & Bojesen-Koefoed, J. A. (1997). Palaeo-oil field in a Silurian carbonate buildup, Wulff Land, North Greenland: project ‘Resources of the sedimentary basins of North and East Greenland’. Geology of Greenland Survey Bulletin, 176, 24-28. https://doi.org/10.34194/ggub.v176.5056 _______________ The multi-disciplinary research project ‘Resources of the sedimentary basins of North and East Greenland’ was initiated in 1995 with financial support from the Danish Research Councils (Stemmerik et al., 1996). During the 1996 field season, hydrocarbon-related studies within the project were focused on the sedimentary basins of East Greenland (Stemmerik et al., 1997), while field work in the Franklinian Basin of North Greenland from which the observations reported here derive, was limited to two weeks in early August. The project also includes research related to the ore geology of North Greenland, especially focused on the zinc-lead deposit at Citronen Fjord (Fig. 1). This aspect of the project is covered by Langdahl & Elberling (1997) and Kragh et al. (1997). The work on the Franklinian Basin succession was based at Apollo Sø in eastern Wulff Land (Fig. 1), with the main emphasis on sedimentological and sequence stratigraphic studies of carbonates of the Cambrian portion of the Ryder Gletscher Group and the Silurian Washington Land Group. These two carbonate-dominated shelf successions are equivalent in age to the main source rocks for liquid hydrocarbons in the basin, and have been suggested as potential reservoir units in the conceptual reservoir models proposed for the basin (Christiansen, 1989). Earlier investigations in the region have shown that small occurrences of bitumen are widespread in western North Greenland, although typically closely associated with nearby source rocks (Christiansen et al., 1989a). Notable exceptions are the asphalt seepages in southern Warming Land and southern Wulff Land (Fig. 1); in these cases, long distance migration of the order of 75–100 km is envisaged (Christiansen et al., 1989a). During the 1996 field season, a palaeo-oil field was identified in a carbonate buildup in eastern Wulff Land (Victoria Fjord buildup), thus demonstrating for the first time that Silurian buildups have formed large-scale reservoirs for generated hydrocarbons in the geological past.

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