Готові списки джерел за темами / Mount Isa depositional environment

Добірка наукової літератури з теми "Mount Isa depositional environment"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Mount Isa depositional environment"

McConachie, B. A., M. G. Barlow, J. N. Dunster, R. A. Meaney, and A. O. Schaap. "THE MOUNT ISA BASIN—DEFINITION, STRUCTURE AND PETROLEUM GEOLOGY." APPEA Journal 33, no. 1 (1993): 237. http://dx.doi.org/10.1071/aj92018.

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The Mount Isa Basin is a new concept to describe the area of Palaeo- to Mesoproterozoic rocks south of the Murphy Inlier (not the Murphy Tectonic Ridge) and inappropriately described as the Mount Isa Inlier. The new basin concept presented in this paper allows the characterisation of basin-wide structural deformation and the recognition of areas with petroleum exploration potential.The northern depositional margin of the Mount Isa Basin is the metamorphic, intrusive and volcanic complex referred to as the Murphy Inlier. The eastern, southern and western boundaries of the basin are obscured by younger basins (Carpentaria, Eromanga and Georgina Basins). The Murphy Inlier rocks comprise the seismic basement to the Mount Isa Basin sequence. Evidence for the continuity of the Mount Isa Basin with the McArthur Basin to the northwest and the Willyama Block (Basin) at Broken Hill to the south is presented. These areas combined with several other areas of similar age are believed to have comprised the Carpentarian Superbasin.The application of seismic exploration within Authority to Prospect (ATP) 423P at the northern margin of the basin was critical to the recognition and definition of the Mount Isa Basin. The northern Mount Isa Basin is structurally analogous to the Palaeozoic Arkoma Basin of Oklahoma and Arkansas in the southern USA but as with all basins it contains unique characteristics, a function of its individual development history. The northern Mount Isa Basin is defined as the basin area northwest of the Mount Gordon Fault.

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Cooper, Nathan, Donna Green, Marianne Sullivan, and David Cohen. "Environmental justice analyses may hide inequalities in Indigenous people’s exposure to lead in Mount Isa, Queensland." Environmental Research Letters 13, no. 8 (July 23, 2018): 084004. http://dx.doi.org/10.1088/1748-9326/aad295.

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Thouret, Jean-Claude. "The stratigraphy, depositional processes, and environment of the late Pleistocene Polallie-period deposits at Mount Hood Volcano, Oregon, USA." Geomorphology 70, no. 1-2 (August 2005): 12–32. http://dx.doi.org/10.1016/j.geomorph.2005.03.008.

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Gale, Luka. "Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)." Geologica Carpathica 61, no. 4 (August 1, 2010): 293–308. http://dx.doi.org/10.2478/v10096-010-0017-0.

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Microfacies analysis of the Upper Triassic (Norian) "Bača Dolomite": early evolution of the western Slovenian Basin (eastern Southern Alps, western Slovenia)The Slovenian Basin represents a Mesozoic deep-water sedimentary environment, situated on the southern Tethyan passive margin. Little is known about its earliest history, from the initial opening in the Carnian (probably Ladinian) to a marked deepening at the beginning of the Jurassic. The bulk of the sediment deposited during this period is represented by the Norian-Rhaetian "Bača Dolomite", which has, until now, been poorly investigated due to a late-diagenetic dolomitization. The Mount Slatnik section (south-eastern Julian Alps, western Slovenia) is one of a few sections where the dolomitization was incomplete. Detailed analysis of this section allowed us to recognize eight microfacies (MF): MF 1 (calcilutite), MF 2 (pelagic bivalve-radiolarian floatstone/wackestone to rudstone/packstone), MF 3 (dolomitized mudstone) with sub-types MF 3-LamB and MF 3-LamD (laminated mudstone found in a breccia matrix and laminated mudstone found in thin-bedded dolomites, respectively) and MF 3-Mix (mixed mudstone), MF 4 (bioturbated radiolarian-spiculite wackestone), MF 5 (fine peloidal-bioclastic packstone), MF 6 (very fine peloidal packstone), MF 7 (bioclastic wackestone) and MF 8 (crystalline dolomite). The microfacies and facies associations indicate a carbonate slope apron depositional environment with hemipelagic sedimentation punctuated by depositions from turbidites and slumps. In addition to the sedimentary environment, two "retrogradation-progradation" cycles were recognized, each with a shift of the depositional setting from an inner apron to a basin plain environment.

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Shaygan, Mandana, and Thomas Baumgartl. "Simulation of the Effect of Climate Variability on Reclamation Success of Brine-Affected Soil in Semi-Arid Environments." Sustainability 12, no. 1 (January 2, 2020): 371. http://dx.doi.org/10.3390/su12010371.

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Soils in arid and semi-arid environments are threatened by salinization. A cost-effective and efficient way to reclaim saline land is through leaching. This will be most effective in situations where direct human impact is the cause for salinity, e.g., in environments affected by industrial use or land rehabilitation following mining. Irrigation, which is the most common means of achieving salt leaching, is not feasible for the reclamation of mine sites’ salt-affected soils located in remote areas, and thus, land reclamation largely relies on natural climatic conditions. This study was conducted to assess the effect of different climatic conditions of semi-arid environments on spatio-temporal salt leaching from brine-affected soil, and investigate the efficacy of the reduction of soil bulk density as a reclamation technique for saline land experiencing water scarcity. Three regions (represented by the Australian cities of Roma, Mount Isa, and Quilpie) representing semi-arid environments of Australia were selected, and their climatic scenarios (23 years) were applied to a validated HYDRUS-1D model. A brine-affected soil typical to Queensland, Australia, was chosen for this study. The investigations established that a greater number of individual high rainfall events resulted in a greater reduction of salinity in Roma (96%) and Mount Isa (93.31%) compared with Quilpie (58.75%), in which the soil salinity approached a level (<2 dS m−1) that was suitable for sustaining plant growth. Soil salinity reduced to 8 dS m−1 under the climatic conditions of the Quilpie region. This study also demonstrated that the success of salt leaching from a brine-affected soil is a consequence of a sensitive response to the depth of individual rainfall events rather than rainfall distribution and the total amount of rainfall, and is controlled by the physical properties of the soil. Where climatic conditions cannot solely assist with salt leaching, reclamation may be successful by reducing soil bulk density.

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Brooks, Gregory R., and Edward J. Hickin. "Debris avalanche impoundments of Squamish River, Mount Cayley area, southwestern British Columbia." Canadian Journal of Earth Sciences 28, no. 9 (September 1, 1991): 1375–85. http://dx.doi.org/10.1139/e91-121.

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Squamish River has been impounded temporarily by debris avalanches from Mount Cayley on numerous occasions. Evidence of these impoundments comes from backwater deposits and also from a cluster of in situ stumps protruding from a bar along Squamish River. Backwater deposits consist of both lacustrine and fluvial deposits that have formed within the low-energy depositional environment created by a river impoundment. Three main backwater deposits occur in the study area. The fan toe deposit is ~14 m thick and represents a single impoundment of Squamish River that likely formed behind a large ~4800 BP debris avalanche. In situ ~3200 BP stumps along Squamish River probably were killed by a river impoundment due to a debris avalanche. The upper terrace backwater deposit is ~6 m thick and forms an aggradational terrace along Squamish River which probably accumulated behind an ~1100 BP debris avalanche. The lower terrace deposit also forms an aggradational terrace along Squamish River but represents four or possibly five separate impoundments. These occurred between ~1100 BP and 1955 AD, and it seems likely that one of the deposits relates to an ~500 BP debris avalanche. Seven or eight Holocene impoundments of Squamish River have been identified in the study area.

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Sav, Adem, Michelle A. King, Fiona Kelly, Sara S. McMillan, Elizabeth Kendall, Jennifer A. Whitty, and Amanda J. Wheeler. "Self-management of chronic conditions in a rural and remote context." Australian Journal of Primary Health 21, no. 1 (2015): 90. http://dx.doi.org/10.1071/py13084.

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Living in a rural or remote environment presents unique challenges for people with chronic conditions, mainly those created by limited health-care services and the physical and emotional isolation. Yet, research on how people self-manage their chronic conditions in such locations is limited. This study aims to contribute to research and clinical practice by describing the ways in which a diverse group of rural and remote people with a range of chronic conditions, and their unpaid carers, self-manage their conditions. Using semi-structured in-depth interviews, data was collected from a sample of 32 participants, residing in one of two regions of Australia: Mount Isa/North West region of Queensland and the Northern Rivers area of New South Wales. Our findings suggest that although self-managing in a rural and remote context requires many of the lifestyle changes necessary in urban areas, the uniqueness of the rural lifestyle and the limited availability of health care results in, at times, creative forms of self-management. Health-care professionals and policy makers need to be cognisant of the ways in which rural and remote residents modify self-management strategies to suit their needs, and help them develop self-management plans tailored to the realities of their rural environment.

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Jarrett, Amber J. M., Adam E. H. Bailey, Christopher J. Boreham, Tehani Palu, Lisa Hall, April Shannon, Alan S. Collins, et al. "A geochemical investigation into the resource potential of the Lawn Hill Platform, northern Australia." APPEA Journal 60, no. 2 (2020): 722. http://dx.doi.org/10.1071/aj19118.

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The Lawn Hill Platform (LHP) is a sedimentary province in north-eastern Northern Territory and north-western Queensland that hosts a significant Paleoproterozoic–Mesoproterozoic sequence, often referred to as 'the ‘Isa Superbasin’, and includes the overlying South Nicholson Group. Shale gas resources and base-metals mineralisation are known in north-west Queensland, but the larger basin is underexplored. The Australian Government’s Exploring for the Future (EFTF) 2016−2020 program aims to boost resource exploration in northern Australia. New precompetitive geochemical data obtained in this program includes source rock geochemistry, kerogen kinetics, bitumen reflectance, biomarker and δ13C n-alkanes for understanding the petroleum potential, organic geochemistry of source rocks and fluids, stratigraphic correlations and mineralogy to determine the brittleness of shales. All data and derived reports are accessible on the EFTF portal (www.eftf.ga.gov.au), providing a central location for informed decision making. The results in this study demonstrate fair to excellent source rocks in multiple supersequences that are brittle and favourable to hydraulic stimulation. A comparison to the greater McArthur Basin demonstrates, that although there are many similarities in bulk geochemistry, LHP mudstones are largely heterogeneous, reflecting local variations that may be inherited from variations in contributing biomass, microbial reworking, depositional environment, sediment input and paleoredox conditions.

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Li, Jun, Zhong Han, Xingyue Wen, Gregory J. Retallack, and Chengmin Huang. "Sea-level fluctuations in the late Middle Permian estimated from palaeosols of the Sichuan Basin, SW China." Geological Magazine 157, no. 8 (January 15, 2020): 1333–48. http://dx.doi.org/10.1017/s0016756819001481.

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AbstractTwo upper Middle Permian palaeosols, consisting of coal and pyrite intercalated with a 20 cm thick limestone, were found near Mount Emei in the SW Sichuan Basin, China. The macro- and micromorphology and physico-chemical properties, in conjunction with the mineralogical composition of the palaeosol horizons were investigated. This type of palaeosol is common within the Permian intertidal facies of the Upper Yangtze Craton. The section reflects fluctuations within the range of 0–25 m in relative sea-level, with the depositional environment changing from shallow-marine to littoral, followed by tidal-flat to littoral, and finally to continental volcanic rocks, based on a combination of palaeopedological and carbonate microfacies analyses. Such short-term relative sea-level fluctuations in late Middle Permian times in the SW Sichuan Basin of South China are consistent with the long-term falling trend on a global scale in late Middle Permian times, and may be related to regionally variable subsidence and global cooling. The combination of coastal palaeosol and carbonate microfacies analyses is proposed as an additional tool for estimating the amplitude of sea-level changes.

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Gorton, Justin, and Mike Martin. "The transformation of Australia’s first commercial CSG field into a major gas project: how innovation and subsurface understanding has driven its success." APPEA Journal 62, no. 1 (May 13, 2022): 235–44. http://dx.doi.org/10.1071/aj21090.

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Mount Isa Mines Limited discovered coal seam gas (CSG) in the ‘Dawson Valley’ in 1991. It was the first commercial coal seam gas field in Australia, with production and sales of gas commencing circa 1994, then operated by Conoco and known as Meridian SeamGas. In 2010, Westside Corporation acquired a 51% operating interest in Meridian SeamGas from Anglo American (Anglo) and Mitsui Moura Investment Pty Ltd (MMI). Over the last 10 years, Westside has increased sales by 466% from 9 terajoules per day (TJ/d) to 42 TJ/d with gas being sold to both domestic and export markets. Further acreage acquisition to the north and south increased the asset area by 264%; now known as the Greater Meridian Fields (GMF). The steep rise in gas demand, complex market dynamics, regulatory environment, and competition from large global oil and gas operators makes it a challenging environment for smaller gas producers in Australia. Remaining agile and employing innovative approaches to optimise field development are key factors for Westside’s growth. In particular, the pad-based drilling of up dip multi-lateral wells has reduced cost and surface footprint, while enabling more efficient gas drainage. To support this field development, a more robust subsurface framework was required. Adequate knowledge of the distribution and variability of coal thickness, gas content/composition, structure, and geohazards forms the basis of the static model. It is used for resource definition and for the optimal planning and execution of multi-lateral wells, reducing drilling risks.

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Більше джерел

Частини книг з теми "Mount Isa depositional environment"

Drummond, B. J., A. J. Owen, J. C. Jackson, B. R. Goleby, and S. N. Sheard. "8. Seismic-Reflection Imaging of the Environment around the Mount Isa Orebodies, Northern Australia: A Case Study." In Hardrock Seismic Exploration, 127–38. Society of Exploration Geophysicists, 2003. http://dx.doi.org/10.1190/1.9781560802396.ch8.

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