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Статті в журналах з теми "Honours; Geology"
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Walkden, Gordon. "A Field-Based “Oil Business Game” for Honours Geology Students." Planet 1, no. 1 (January 2001): 8–12. http://dx.doi.org/10.11120/plan.2001.00010008.
Повний текст джерела
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Johnson, G. A. L. "Sir Kingsley Charles Dunham. 2 January 1910 – 5 April 2001 Elected FRS 1955." Biographical Memoirs of Fellows of the Royal Society 49 (January 2003): 147–62. http://dx.doi.org/10.1098/rsbm.2003.0009.
Повний текст джерелаАнотація:
The history of the Dunham family goes back to the researches of Kingsley Dunham's grandfather, Rev. Charles Dunham (1848–1942), a Methodist Minister and diarist who, at the age of 72, brought together facts and recollections of the Dunham family. Apparently the family migrated from East Anglia and settled in the Bedford area for 200 years, centred on the village of Shillington. By the middle of the nineteenth century the family were bootmakers and shoemakers and moved to north London. Kingsley Dunham's father, Ernest Pedder Dunham, was trained in estate management at the Duke of Bedford's office in Trafalgar Square, and in 1904 he was given a position in the Pitt-Rivers estate office at Hinton St Mary, Dorset. To here he brought his bride, Edith Agnes Humphreys, to live at Newton House, Sturminster Newton. The first child, Kingsley Charles Dunham, was born on 2 January 1910. The family's time in Dorset was short, because Ernest Dunham's post came to an end in 1913 and be obtained a new appointment at Lord Boyne's estate office at Brancepeth near Durham. Although this estate was later sold to the Duke of Westminster, Ernest Dunham stayed on as agent throughout his career. Kingsley Dunham's mother Edith was a trained schoolteacher and chapel organist, and she gave him the foundations of his education and an introduction to music. Aged seven years he joined the school on the estate, Brancepeth Village School. Here he was well prepared to sit for a County Scholarship in the spring of 1921, when he was 11 years old. Dunham won the scholarship and entrance to the Durham Johnston School, a notable secondary school in the district. The teaching at the Johnston School was extremely efficient and he flourished, developing a particular interest in physical science and mathematics. His hobby was music and he was taught the organ at Durham Cathedral by the Canon Precentor, A.D. Culley. He was also a chorister at St Brandon's Church, Brancepeth, for five years, where, despite his Methodist background, the liturgy of the Anglican prayerbook made a deep and lasting impression. He was head of school in 1927 and sat for a Durham University Open Foundation Scholarship, winning a junior award. Thus, early in October 1927, aged 171/2, Dunham went up to Hatfield College, University of Durham, a scholar and later organ scholar. He was advised to read honours in chemistry with two auxiliary subjects, for which he chose physics and geology. The chemistry course was enjoyable, but the real joy was the geology course, with lectures on physical fundamentals given by Professor Arthur Holmes (FRS 1942) and practical work and fieldwork with Dr William Hopkins. The geology course and particularly the fieldwork proved to be life changing. At the end of the first year, Dunham was encouraged to continue with geology and found himself the only honours candidate in geology in his year, with almost individual attention from Professor Holmes and Dr Hopkins.
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Tirdad, Shiva, Erwan Gloaguen, Abderezzak Bouchedda, and J. Christian Dupuis. "Three-dimensional stochastic assimilation of gravity data in Lalor volcanogenic massive sulphide, Manitoba, Canada." Canadian Journal of Earth Sciences 56, no. 5 (May 2019): 556–68. http://dx.doi.org/10.1139/cjes-2018-0166.
Повний текст джерелаАнотація:
We propose a new numerical workflow based on stochastic data integration where we merge a conceptual geological model, drillhole geophysical and geological logs, and surface geophysical data to compute a unified numerical model of a volcanogenic massive sulphide (VMS) deposit. The first step of the workflow consists in building a three-dimensional (3D) numerical conceptual model of the geology. This conceptual model, as well as geological logs, is then used to generate multiple equiprobable scenarios of the geology by means of multiple-point simulation (MPS). The MPS method studies high-order statistics in the space of a numerical conceptual model, making it possible to reproduce complex geological structures. We then use conventional conditional sequential Gaussian simulation, which is a method based on a node-by-node sequential process, to stochastically populate the geological grid with densities. For this purpose we use available density logs to simulate multiple equiprobable spatial distributions of the density at high spatial resolution within each geological unit separately. The stochastic high-resolution density models are iteratively combined by the gradual deformation method to minimize the difference between measured Bouguer anomaly data and the data computed on the combined realizations of density. Application of the proposed method to the Lalor deposit, a VMS deposit in Manitoba, Canada, produces a density model that honours the geology of the deposit and the Bouguer anomaly data. This unified model has the advantage to include all the available information (geological and density logs and surface geophysics) at scales appropriate for mining applications.
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Simmons, Michael D., Peter R. Sharland, David M. Casey, Roger B. Davies, and Owen E. Sutcliffe. "Arabian Plate sequence stratigraphy: Potential implications for global chronostratigraphy." GeoArabia 12, no. 4 (October 1, 2007): 101–30. http://dx.doi.org/10.2113/geoarabia1204101.
Повний текст джерелаАнотація:
ABSTRACT The ability to recognise and correlate third-order depositional sequences across Arabia and between Arabia and other plates indicates that these sequences are driven by synchronous eustatic sea-level change. This is of value in providing guidance for the definitions of stages, which are the fundamental units of chronostratigraphy. Each Phanerozoic stage requires a Global Stratotype Section and Point (GSSP), which is a location and specific bedding plane where the base of each stage is defined. This definition is tied to an event in the rock record useful for correlation. Progress in defining GSSPs has been delayed because of difficulties in choosing the most appropriate event and section to relate to a definition. It is recommended here that stage boundaries be related to correlative conformities of sequence boundaries. This closely links chronostratigraphy with sequence stratigraphy and honours the original concepts upon which many stages were first described in the 19th Century.
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Lord, Alan R., and John E. Whittaker. "On the award of TMS Honorary Membership, 17 November 2004 Professor Robin Whatley – an appreciation." Journal of Micropalaeontology 24, no. 1 (May 1, 2005): 95–96. http://dx.doi.org/10.1144/jm.24.1.95.
Повний текст джерелаАнотація:
Abstract. Robin Charles (Ignatius) Whatley was born a ‘Man of Kent’ in 1936. He was educated at Ashford Grammar School, where an inspiring teacher, Frank Kenworthy, stimulated a series of pupils to become earth scientists, for example, John Catt (University College London), Roy Clements (Leicester University), Ron Cook (recently Vice Chancellor of York University) and Chris Wilson (Open University). Following a varied post-school career as a farmer (1954), National Serviceman (1955–1957), and inshore fisherman based at Christchurch, Hampshire (1957–1959), Robin joined Hull University to read Geology. He graduated with a First Class Honours Degree in 1962, one of the first two ever to be awarded by the department. An interest in Micropalaeontology, in particular ostracods, became apparent during undergraduate years and formed part of his BSc dissertation. A further three years at Hull followed, funded by the Department of Scientific and Industrial Research (DSIR, fore-runner of the modern research councils), leading to the award of a PhD degree in 1966 for a thesis on British Callovian and Oxfordian ostracods, carried out under the supervision of John Neale. As a mature student Robin felt it to be his duty to write stern letters to DSIR pointing out the shortcomings of its procedures and officials, and he was somewhat surprised when, visiting DSIR for a Post-Doctoral Fellowship interview, he discovered that his letters were regularly pinned to the staff notice board to be read by all. As it turned out a Fellowship was not required, as Robin was appointed Assistant Lecturer in Geology . . .
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Paar, Rinaldo. "Carl Ritter von Ghega – 2018 Surveyor of the Year." Kartografija i geoinformacije 18, no. 32 (December 15, 2019): 64–78. http://dx.doi.org/10.32909/kg.18.32.5.
Повний текст джерелаАнотація:
Carl Ritter von Ghega was proclaimed 2018 Surveyor of the Year on 21 March 2018. In this paper, we explore how this Austrian of Albanian extraction, born in Venice, played an important role in geodesy and the surveying profession and the honours he got up to the present day. We investigate his background and details of his professional path, education and most important contributions in the areas of surveying and engineering at large. We describe his most significant achievement, that is, the Semmering Railway, which was dismissed at the time as impossible to achieve. In 1998, the Semmering Railway was inscribed in the UNESCO World Heritage List. Apart from this project, which left a great impression on the engineering profession, von Ghega also developed the Borovnica Viaduct built in the mid-19th century in Slovenia.
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Wong, Theo E., Salomon B. Kroonenberg, and Tom J. A. Reijers. "Editorial." Netherlands Journal of Geosciences - Geologie en Mijnbouw 95, no. 4 (November 21, 2016): 373–74. http://dx.doi.org/10.1017/njg.2016.41.
Повний текст джерелаАнотація:
This special issue of the Netherlands Journal of Geosciences / Geologie en Mijnbouw contains the proceedings of the Conference on the Economic Geology of Suriname, held on 16 January 2015 in The Hague, the Netherlands, to honour Dr Eddie Jharap (Fig. 1), founder and former Chief Executive Officer of Staatsolie, Suriname. At this conference the President of the Royal Netherlands Geological and Mining Society (KNGMG), Drs Lucia van Geuns, awarded him the prestigious Van Waterschoot van der Gracht Medal, the highest honour available to an earth scientist in the Netherlands. Dr Jharap expressed his gratitude in a warm and humble speech which highlighted both his strong personal motivation to contribute to the development of Suriname, and his astonishing accomplishments since the 1980s in founding and developing Staatsolie.
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Graversen, Ole, and Jens Morten Hansen. "Danmarks Geologipris -Denmark's Geology Prize." Bulletin of the Geological Society of Denmark 41 (November 30, 1994): 126–27. http://dx.doi.org/10.37570/bgsd-1995-41-22.
Повний текст джерелаАнотація:
Denmark's Geology Prize was instituted in 1993 by the Geological Survey of Denmark together with the Geological Society of Denmark. The prize was set up in order to honour high quality work and publications on the geology of Denmark. Denmark's Geology Prize was presented for the fir·st time at the 100 years anniversary symposium of the Geological Society of Denmark. It was awarded to professor Asgcr Berthelsen in honour of his contributions to Danish Quaternary geology and for his work on the lithosphere of Denmark and adjoining areas.
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Jenkyns, Hugh. "Geology Honors Exceptional Reviewers." Geology 35, no. 2 (2007): 192. http://dx.doi.org/10.1130/0091-7613(2007)35[192:gher]2.0.co;2.
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Dewey, John Frederick, and Bernard Elgey Leake. "Robert Millner Shackleton. 30 December 1909 – 3 May 2001." Biographical Memoirs of Fellows of the Royal Society 50 (January 2004): 285–97. http://dx.doi.org/10.1098/rsbm.2004.0018.
Повний текст джерелаАнотація:
Robert Millner Shackleton, who died peacefully in his sleep on 3 May 2001, was born on 30 December 1909 in Purley, Surrey, the son of John Millner Shackleton (an electrical engineer of Irish derivation who, at one time, worked for the Post Office telephones) and Agnes Mitford Shackleton (née Abraham). He was distantly related to the Antarctic explorer Sir Ernest Shackleton and was educated at the Quaker school of Sidcot, which profoundly influenced his subsequent life and career. He entered Liverpool University in January 1927 and graduated with a first–class honours BSc in geology in July 1930 under P. G. H. Boswell FRS, the first George Herdman Professor of Geology. He was only the fourth student in the history of the department to achieve a First. Shackleton's first visit to Africa was as an undergraduate in July to September 1929 to attend the 15th International Congress in Pretoria, South Africa. He always remembered Boswell's help and how he had persuaded him into going and even shared a cabin on the Union Castle ship to South Africa with him to reduce the cost at a time when most professors would not have done so. He saw the Karroo, the Kimberley diamond mine, the Witwatersrand mines, the Bushveld, Rhodesia, and the Drakensberg. This visit to Africa was to be the foundation of his love of Africa, its people and its geology. Shackleton went on to complete a PhD at Liverpool in December 1933 on the Moel Hebog area of North Wales, between Tremadoc and Nantlle, although some of the work was done while at Imperial College, London (IC), where he was Beit Research Fellow from 1932 to 1934, largely facilitated by Boswell, who was also an IC man and had moved back there to the Chair in 1930. The Moel Hebog mapping included examining some cliff faces never scaled by any geologist or, indeed, anyone before; it was part of a systematic re–survey of North Wales encouraged by Boswell, and followed the surveys of Snowdonia by David and Howell Williams. The Moel Hebog mapping was superb and, with his other field achievements, led to his receiving the Silver Medal of the Liverpool Geological Society in 1957. Shackleton was one of several Liverpool students, including one of us (B.E.L.), who from the 1920s onwards did part of their PhD work at IC. He had a petrological training, being taught silicate analysis by A. W. Groves at IC, but the petrological and palaeogeographic interpretation of his PhD area was hindered by the fact that ignimbrites had not yet been recognized and only a few chemical analyses could be completed. The published account (7) è did not appear until 1959 and then only because of the encouragement and devoted help given by Dr J. C. Harper.
Дисертації з теми "Honours; Geology"
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Cave, B. J. "Copper - Gold exploration in the Middleback Ranges; source(s) of fluids and metals." Thesis, 2010. http://hdl.handle.net/2440/98295.
Повний текст джерелаАнотація:
This item is only available electronically.The Moola Prospect of the Middleback Ranges, South Australia is an epigenetic, hypothermal copper-gold prospect that displays several clear genetic affinities with IOCG deposits/prospects in the Gawler Craton, although from this study alone classification of the mineralisation is imprudent. A broad study on the mineral paragenesis and geochemistry of the deposit was carried out on a single drill core provided by OneSteel, the holder of the tenement encompassing the Moola Prospect. The mineralisation, characterised by pyrite + chalcopyrite, hematite and magnetite, is hosted by the Palaeoproterozoic metavolcanic / volcaniclastic, Myola Volcanics and an unnamed, undated fine-grained microgranite that intrudes the Myola Volcanics. This unnamed, undated microgranite, displays geochemical and petrological similarities with the Myola Volcanics from which it‘s thought to be partial derived from its anatexis; likely being a Wertigo Granite equivalent. Four alteration assemblages were observed in the Moola Prospect drill core and placed into the following paragenic sequence; Na (Ca-Fe) characterised by the formation of albite; sericite replacing K-feldspar and plagioclase and alteration increasing towards sericite veining; chlorite with alteration increasing towards chlorite-mica±epidote veins; late stage quartz, quartz-carbonate, carbonate flooding, that hosts mineralisation. Ore mineral paragenesis occurs in an overlapping sequence; the first mineral precipitated was magnetite that was later extensively martitised, with hematite followed by pyrite and minor heamatite + pyrite, pyrite + chalcopyrite, then chalcopyrite. Later supergene alteration altered the chalcopyrite to native copper and malachite. Sphalerite precipitation couldn‘t be constrained from petrological evidence alone. Iron oxide and sulphide chemistry, and sulphur isotopes from the sulphides support this paragenesis, and constrains precipitation of sphalerite between the pyrite only and chalcopyrite only phases. Iron oxide chemistry also revealed the presence of illmentite in the core, however could only constrain illmentite precipitation as, coeval to after haematite precipitation. Sulphur isotopes revealed evidence for an additional late stage pyrite precipitation, after the chalcopyrite only phase. Bulk rock composition was quite variable with some altered samples showing strong enrichments of Fe2O3, SiO2, CaO, K2O, Na2O SO3, MnO, P2O5 and MgO. Strong enrichment of CaO and/or SiO2 in some of the altered samples, but not others, suggests that the quartz-carbonate alteration represented by this geochemical signature is sporadic in nature. Depletion in SiO2 in some of the altered samples could also represent the consumption of silica during the Na-Ca-Fe alteration event. Enrichment of SO3 in the altered samples likely directly represents alteration related to the precipitation of sulphide ore minerals. Trace element and rare earth element compositional changes from alteration shows enrichments of Cu, U, Pb, Li, B, Mn and V likely relating to alteration associated with mineralisation. εNd (1590Ma) values of the Moola Prospect together with εNd (1590Ma) versus whole rock Cu concentration and Co: Ni ratios of pyrite, indicates a crustal derived, with minor mantle input for the sources of metals. Sulphur isotopes and trace element whole rock geochemistry indicates a primitive/ magmatic fluid source is responsible for alteration and/ or mineralisation.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2010
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Jones, R. S. W. "Cu mineralisation in the Middleback Ranges: conditions of mineralisation." Thesis, 2010. http://hdl.handle.net/2440/101671.
Повний текст джерелаАнотація:
This item is only available electronically.The Moola Prospect situated within the Middleback Ranges on the northern Eyre Peninsula, South Australia, is comprised of potential IOCG-style, Cu mineralisation which appears to share some geological and mineralogical affinities with other IOCG deposits throughout the Gawler Craton. This recently identified mineralisation represents a new exploration region within the southern extent of the Olympic Cu-Au province which has proven to be highly lucrative with the recent discovery of the Hillside deposit in the neighbouring Yorke Peninsula. A broad investigation into host rock lithology, alteration and mineralisation paragenesis, as well as paleotemperature-pressure conditions of the deposit was carried out on drill core from OneSteel’s inaugural exploratory diamond drill hole. The mineralisation is hosted within the Paleoproterozoic Myola Volcanics, a package of rhyolites, rhyodacites and felsic gneisses which are intruded by amphibolite sills and granitic intrusives, assumed to be the neighbouring Wertigo granite. Prominently vein hosted, the mineralisation is localised around a north-northeast trending shear zone inferred to be an expression of the Kimban aged, Kalinjala shear zone which is located ~60 Km west of the Middleback Ranges. The alteration mineralogy present is divisible into two main assemblages, an early albite-epidote assemblage which has experienced extensive overprinting by the main mineralising phase associated with a quartz-carbonate-sericite± hematite-sulphide assemblage. Ore mineral paragenesis occurs as a transition of overlapping minerals that record coprecipiation. The first mineral to form was magnetite which was later extensively martitised during the transition to hematite precipitation which is preceded by a transition to pyrite, then finally chalcopyrite. A later phase of native copper mineralisation is recorded within the transecting shear zone which represents a supergene enrichment interpreted to have occurred as meteoric water gained access to depth via the structural weakness of the shear zone and remobilised any sulphides present, which were redeposited as native copper. The temperature of mineralisation was established by TitaniQ thermometry which provided a precise temperature range between 415-530 °C with the peak at ~475 °C, which represents the conditions at which the paragenically linked quartz and mineralisation formed. Chlorite thermometry was also performed to obtain a temperature of mineralisation, with a few samples corresponding with the conditions established by the TitaniQ thermometer; however a majority of the data overestimates the temperature range by an unacceptable amount. Pressure conditions were reconstructed using the much more reliable TitaniQ temperature range inconjuntion with fluid inclusion data to establish the pressure conditions of mineralisation which ranged between ~5-7 kbar, and indicated mineralisation occurred at a deep crustal setting. Fluid and mineralisation characteristics indicate a moderate salinity inferred from the fluid inclusions study, with NaCl ranging between 27.5-7.5 equiv wt%, along with a sulphur isotopic signature corresponding with magmatically derived fluids with the δ34S ranging between -10.5 and -1.2 ‰. Which corresponds with other IOCG style mineralisation present throughout the Craton, with the Moola Prospect also being spatially associated to the interpreted source of these fluids within the Galwer Craton, the Hiltaba Suite granitoids? Even though the Moola Prospect shares affinities with IOCG style mineralisation this study cannot definitively identify its model of genesis as it also comprises characteristics that contradict this model, indicating that further study is required to better understand the extent and nature of this mineralising system.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2010
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Barker, A. R. "The thermal properties, temperature structure and thermal evolution of the Eastern Ghats, India." Thesis, 2010. http://hdl.handle.net/2440/98285.
Повний текст джерелаАнотація:
This item is only available electronically.The role of the portable gamma ray spectrometer has become a fundamental addition for gathering heat production data to constrain stochastic thermal modelling of the crust. Numerous sensitivity and calibration analyses have been undertaken to verify the validity of the output, and to aid in more efficient and effective use for future users. When applied to a heat flow study of the Eastern Ghats, it was established that the predominantly granulite-facies rocks such as khondalites, Kfeldspar megacrystic granites and quartzo-feldspathic gneisses have high average heat production values of 3.76 ± 0.53μWm-3, 2.79 ± 0.53μWm-3 and 5.49 ± 0.69μWm-3 respectively, whereas the UHT granulites have a low heat production of 0.69 ±0.23 μWm-3. The contribution of uranium to the total heat production was considered low when compared to the input from thorium, which was almost four times higher. The average concentrations of thorium were also approximately fifteen times more than the concentrations of uranium. In this research, thermal conductivity testing was conducted to better constrain parameters for stochastic thermal modelling. Coupled with previous seismic studies, four crustal sections were analysed by one-dimensional steady-state finite difference models using the results of this project. Conclusions drawn from this study indicate that there is a possibility the Eastern Ghats is currently a UHT region, whereas burial of these high heat-producing rocks during orogenesis could have readily heated the crust to produce UHT granulite-facies metamorphism.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2010
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Grguric, B. "The petrology, geochemistry, and fluid history of calc-silicate rocks and associated primary Cu-Co mineralization in the Ethiudna Mines area, Olary Province, South Australia." Thesis, 1992. http://hdl.handle.net/2440/113058.
Повний текст джерелаАнотація:
This item is only available electronically.Textures in calc-silicate rocks of the Lower Proterozoic Bimba Suite in the Ethiudna mines area, Olary Province, South Australia, record multiple fluid infiltrational episodes associated with both prograde, amphibolite-facies, and retrograde, greenschist-facies metamorphism. Pervasive infiltration of H2O-rich fluids (XCO2<0.18) during prograde metamorphism, was associated with the large-scale development of wollastonite-rich lithologies within the Bimba Suite. Stable oxygen isotope evidence suggests these fluids were equilibrated with siliciclastic sequence(s) prior to infiltrating the Bimba Suite. A second, retrograde metamorphic (temperatures -300oC) infiltrational episode was associated with the development of a grossular-quartz assemblage. Fluid flow was channelized during this episode, the H2O-rich fluids being focussed along structurally-induced zones of high permeability. Large variations in fluid/rock ratios are recorded in the calc-silicates as large variations in the progress of the grossular-quartz producing reaction. The formation of cross-cutting quartz, calcite, and rare laumontite veins postdates both these infiltrational episodes. Fluid inclusion evidence suggests these veins were deposited by fluids at temperatures of less than 250°C. Fluid inclusion data and scapolite compositional data indicate fluids associated with all three episodes were highly saline, consistent with conclusions made by earlier workers that the Bimba Suite represents a meta-evaporite sequence. The microcline-rich rocks of the. Quartzofeldspathic Suite, which underlies the Bimba Suite, host stratiform and disseminated Cu-Co sulphide mineralization. Geochemical and petrological evidence suggests this mineralization is of the genetic type known as a red-bed-associated Cu deposit. The distribution, geochemistry, and textural characteristics of sulphides in the Bimba Suite, suggest this mineralization represents a metasomatic remobilization of pre-metamorphic Quartzofeldspathic Suite mineralization. The sulphide-silicate-carbonate textural relationship in the Bimba Suite suggests this remobilization took place during the high temperature, wollastonite-producing infiltrational episode, and that precipitation of ore metals was effected by a pH rise.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1992
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Guerin, R. J. "Petrography, mineralogy and trace element chemistry of Cu-Au-Mo mineralisation from Central Diorite, Boddington, W.A." Thesis, 2011. http://hdl.handle.net/2440/88640.
Повний текст джерелаАнотація:
This item is only available electronically.The world-class Boddington Cu-Au-Mo deposit has a complex genetic history. The relative importance of different ore-forming processes during the period 3.0 – 2.6 Ga is debated, particularly with respect to the role played by the 2611±3 Ma Wourahming granite. LA-ICP- MS analysis of trace element concentration in molybdenite represents a valuable new metallogenetic tool to track mineralising events in deposits with protracted geologic histories. The Re content and trace-element signatures in molybdenite from diorite and granite show three distinct populations, attributed to porphyry-style (hundreds of ppm) orogenic- and granite-related systems (<1 to a few ppm, respectively). Rhenium concentrations in molybdenite are highly variable on the deposit-scale. Economic concentrations of Re occur only at shallower levels in both Central Diorite and ABreccia. The Au content correlates with high-concentrations of chalcophile elements (CE). This is seen in the association of Au- minerals and Bi-(Pb)-tellurides present as inclusions in the molybdenite from diorite and is inferred from an LA-ICP-MS element map for molybdenite in granite. The FIB-SEM and TEM study show that visible telluride inclusions extend down to the nanoscale as coherent intergrowths with host molybdenite. Nanoporosity is accompanied by a whole range of structural defects and twinning. The telluride species identified include unnamed Bi4Pb7Te4S9. Analysis of stacking sequences show co-precipitation of Bi-tellurides and molybdenite under equilibrium conditions. In corroboration with EPMA data, this is the first confirmation that minerals from the aleksite series are characteristic components of the ore at Boddington. Molybdenite with high-concentration of chalcophile elements is present as the 2H polytype only, contrary to previous hypothesis that incorporation of trace elements is assisted by 3R structural modification. Instead, a new mechanism is presented in which coherent lattice-scale intergrowths between molybdenite and tellurides are reasons for the measured high CE concentrations. Knowing that Bi-(Pb)-tellurides are Au-carriers, this may also explain the observed, unusual Au-enrichment in molybdenite from Boddington. Nucleation of Au fine particles is inferred from element map correlations but further work is necessary to prove if Au nanoparticles are also present. Petrographic, mineralogical and geochemical evidence support a three-stage model for Boddington. An early porphyry event can account for the bulk of the Cu mineralisation, as well as some of the Au and Mo. A subsequent orogenic-Au event led to shearing and remobilisation of ore components. New constraints on metamorphic conditions are offered by chlorite and stannite-sphalerite geothermometry (200-420 °C) and the occurrence of two co- existing pyrrhotite species. The granite introduced some Au, Mo and other „granitic‟ elements, notably Bi leading to substantial upgrading of Au grades by Bi-melt scavenging. The study concludes however that hydrothermal activity associated with granite was not the most important concentrator of ore minerals.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2011
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Macintosh, J. N. "Age and basin evolution of the Cuddapah Supergroup, India." Thesis, 2010. http://hdl.handle.net/2440/103376.
Повний текст джерелаАнотація:
This item is only available electronically.U-Pb zircon geochronology indicates deposition of the Cuddapah Supergroup, Cuddapah Basin, India occurred for at least 986 million years. Deposition started after 2502±17 Ma with the deposition of the Gulcheru Formation and ended after 913±11 Ma with the deposition of the Cumbum Formation. Maximum depositional ages have been found for individual formations within the Cuddapah Supergroup; the Pulivendla Formation has a maximum deposition of 1899±19 Ma and the Bairenkonda Formation has a maximum depositional age of 1660±22 Ma. Thermal events during the Palaeoproterozoic present a possible cause of basin formation. At this early stage of the Cuddapah Basin’s evolution the provenance of sediments was the Dharwar Craton, which currently underlies the basin and borders it on the north, south and west sides. The uplift of the Eastern Ghats on the eastern margin affected the evolution of the Cuddapah Basin, changing the shape and the sediments of the basin. Uplift and deformation events in the Eastern Ghats folded the eastern side of the Cuddapah Basin and are responsible for its present crescent shape. The formation of the Eastern Ghats caused increased subsidence to the east, creating an asymmetry in the depth of the basin. The provenance of the sediments of the Cuddapah Supergroup changed to the Eastern Ghats for the deposition of the youngest stratigraphic group, the Nallamalai Group.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2010
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Saunders, P. J. "The structural evolution of the Bull Creek area, southern Adelaide fold belt, South Australia; through the integration of geological mapping and geophysical interpretation." Thesis, 1993. http://hdl.handle.net/2440/87598.
Повний текст джерелаАнотація:
This item is only available electronically.Integration of a high resolution aeromagnetic survey with detailed structural field data has been achieved in the Bull Creek area of the southern Adelaide Fold Belt, resulting in a comprehensive model for the structural evolution of this area. Aeromagnetic data has placed constraints upon structures mapped at the surface and has also revealed information concerning the nature of structures at depth. The successful interpretation of data is due to the good lithomagnetic marker horizons within the area. These horizons include the magnetic Barossa Complex basement and lithomagnetic units of the Adelaide Supergroup and Kanmantoo Group metasediments. The Brachina Formation, an important magnetic marker horizon of the Adelaide Supergroup, lies at depth (due to thrust related tear-faulting) beneath a magnetic cover of Backstairs Passage Formation of the Kanmantoo Group sediments. Geophysical images and contour maps reveal the location and intensity of important magnetic and radiometric anomalies which constrain the interpretation of mapped structures. Modelling of individual magnetic profiles places constraints on the depth to the top, the width, dip and susceptibility of magnetic bodies. Vertical gradient filtering enhances the edges of two dimensional sources and Automated Gains Control filtering amplifies the effects of small anomalies. A model suggesting multiple sequential thrusting has been devised for the Bull Creek area. This model incorporates a basal decollement located within the basement (4-5 km beneath the present erosion level) which has transported a sliver of basement complex to the surface where it forms a hanging wall anticline. An upper detachment has formed near the basement - cover contact within the basal unit of the Adelaidean sequence. High angle histric thrusts of an imbricate fan (or sigmoidal faults of a duplex system?) stem from this detachment fault.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 1993
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Errock, C. H. "Hydrocarbon migration and mixing in four recently discovered oil fields of the southwestern Eromanga Basin." Thesis, 2005. http://hdl.handle.net/2440/93338.
Повний текст джерелаАнотація:
This item is only available electronically.The Cooper and Eromanga Basin is located in northeastern South Australia and southwestern Queensland. Nine samples from four fields within the SA sector of the Cooper-Eromanga Province along the southwestern Patchawarra Trough (Sellicks and Christies) and western Wooloo Trough (Worrior and Arwon) were analysed. The aromatic source and maturity cross plot of 1-MP/9-MP versus 2-MP/1-MP was used to determine the ratio of mixing between Permian- and Jurassic/Cretaceous-sourced hydrocarbon in oils. These oils from the Patchawarra Formation within the Sellicks Field has ~0.9% Rc and is a Family 2 Permian end-member, which has migrated a minimum distance of 23-24 km. This same oil contributes 60-70% of the input to the Birkhead and Hutton reservoirs in the Christies Field. The Jurassic input (~0.6% Rc) came from a Birkhead source located 15-30 km to the east. The Worrior and Arwon Fields contain mixed oils within Jurassic and Cretaceous reservoirs. Here the Permian input decreases up section (Hutton 70%, Birkhead 65%, McKinlay 60%) with the Permian Toolachee Formation and Jurassic Birkhead Formation being the likely source rocks. The minimum migration distance for the oil sourced within the Birkhead Formation is 4-5 km from the west and ~24 km from the east.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2005
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Ryan, S. J. "The geology and genesis of the polymetallic Wagga Tank prospect, Mount Hope, N.S.W." Thesis, 1987. http://hdl.handle.net/2440/105306.
Повний текст джерелаАнотація:
This item is only available electronically.The Wagga Tank Prospect is located in Central Western N.S. W, 125 km south of Cobar. The prospect is hosted by the Lower Devonian Mount Hope Group, a complex succession of sedimentary, felsic volcanic and comagmatic intrusive rocks representing the oldest division of the Cobar Supergroup in the Mount Hope area. The prospect is primarily a Pb and Zn deposit with minor Cu, Ag and significant Au. Gold values are highest within steeply dipping gossan shoots in the oxidised zone, while Pb and Zn values are highest in subvertical shoots of massive sulphide within the primary zone. Cu is concentrated as chalcocite, digenite and malachite at a zone of supergene enrichment. The primary mineralization occurs within a zone of intense tectonic brecciation and argillic alteration at a pronounced flexure along the steeply dipping contact between the volcaniclastic sequence and a siltstone - slate sequence. The mineralization can be divided into two categories on the basis of textural relationships, i.e. fine grained, crudely banded massive type sulphides and coarser grained vein type sulphides. The vein type sulphides are represented by varying proportions of pyrite, chalcopyrite, sphalerite and galena with rare inclusions of cubanite and pyrrhotite. The massive type sulphides show mineral abundances of pyrite>sphalerite>galena>>chalcopyri te. Fluid inclusion and chlorite data indicate that the mineralizing fluid reached temperatures of about 325°C. Sulphur isotope compositions of the sulphide minerals (delta 34S = 10 per mil) suggest that the sulphur originated from seawater SO4-2. Reduction of seawater SO4-2 to H2S was primarily by an inorganic process at elevated temperatures in a heated rock pile. Thermodynamic calculations suggest possible log f02 - pH constraints of about log f02 = -29. 5 to -31. 7 and pH = 3 to 4. 5 for the mineralizing fluid. The mineralization is considered to be of epigenetic hydrothermal origin. The hydrothermal fluid was probably derived from dewatering of the rock pile during metamorphism accompanying the major deformation. Sulphide precipitation occurred along a plane of high permeability produced by folding of adjacent beds with a contrasting competency. The prospect bears many similarities to the principal deposits in the Cobar area. Those deposits are typically narrow steeply plunging elongate bodies occurring along sheared or brecciated contacts between cleaved turbiditic siltstones and coarser clastic beds or felsic volcanics.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1987
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Jagodzinski, E. "The geology of the Gawler Range Volcanics in the Toondulya Bluff area and U-Pb dating of the Yardea Dacite at Lake Acraman." Thesis, 1985. http://hdl.handle.net/2440/86564.
Повний текст джерелаАнотація:
This item is only available electronically.At Toondulya Bluff a sequence of 'older' Gawler Range Volcanics dip in an easterly direction beneath the overlying Yardea Dacite, and are intruded by the comagmatic Hiltaba Granite. The volcanics occur as a series of tuffs and lava flows. Geochemical evidence suggests these volcanics are related to each other by fractional crystallisation, with plagioclase, clinopyroxene, K-feldspar and titan-magnetite, and accessory zircon and apatite controlling differentiation trends. The Si-rich Hiltaba Granite and Yardea Dacite formed from the final, highly fractionated melts. Geothermometry suggests the volcanic and granite crystallised at temperatures within the range 680deg-850degC. The initial magma from which the lithologies were derived, was formed by partial melting of a lower crustal source probably of granulitic composition. Lake Acraman is believed to have been a site of meteoritic impact in the late Proterozoic (~600 Ma ago). Fragments of dacitic ejecta have been identified within the Bunyeroo Formation, Flinders Ranges and dating of these fragments gives an age of c.1575 Ma using single zircon ion probe dating techniques (Gostin et al in prep.). U/Pb dating of the Yardea Dacite at Lake Acraman reveals it to be of comparable age to these fragments (1603-1631 Ma). The lower intercept of the discordia line reveals there has been no resetting of the U/Pb system in response to the postulated meteoritic impact.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 1985
Книги з теми "Honours; Geology"
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London, Geological Society of, ed. Geology of the earthquake source: A volume in honour of Rick Sibson. London: Geological Society, 2011.
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1934-, Verma V. K., Arun Kumar, Kushwaha R. S, and Thakur Baleshwar, eds. Earth system sciences: Felicitation volumes in honour of Professor V.K. Verma. New Delhi: Concept Pub. Co., 2009.
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Germany) International Hanns Bruno Geinitz Symposium (2000 Dresden. International Hanns Bruno Geinitz Symposium: Proceedings of the symposium in honour of Hanns Bruno Geinitz, Dresden, Saxony, January 28-30, 2000. Edited by Geinitz Hanns Bruno 1814-1900 and Lange Jan-Michael. Dresden: Staatliche Naturhistorische Sammlungen, Museum für Mineralogie und Geologie, 2000.
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H, Osborne Robert, ed. From shoreline to abyss: Contributions in marine geology in honor of Francis Parker Shepard. Tulsa, Okla: SEPM (Society for Sedimentary Geology), 1991.
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1902-, Chakravarti D. K., and Bhattacharya A. K. 1928-, eds. Proceedings of Indian Geological IVth Session Congress, Varanasi, 1982: A volume in honour of Prof. D.K. Chakravarti. New Delhi: Today & Tomorrow's Printers and Publishers, 1985.
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J, Aumann Robert, and Wooders Myrna Holtz, eds. Topics in mathematical economics and game theory: Essays in honor of Robert J. Aumann. Providence, RI: American Mathematical Society, 1999.
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SEPM (Society for Sedimentary Geology) and SEPM (Society for Sedimentary Geology). North American Micropaleontology Section, eds. Geologic problem solving with microfossils: A volume in honor of Garry D. Jones. Tulsa , Okla: SEPM (Society for Sedimentary Geology), 2009.
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Sassi, F. P. The abundance of 55 elements and petrovolumetric models of the crust in 9 type areas from the crystalline basements of Italy with some geophysical and petrophisycal data: In honor of Bruno Zanettin on the occasion of his 80th birthday. Edited by Zanettin Bruno. Roma: Accademia nazionale delle scienze detta deiXL, 2003.
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1899-, Korzhinskiĭ Dmitriĭ Sergeevich, and Perchuk L. L, eds. Progress in metamorphic and magmatic petrology: A memorial volume in honor of D.S. Korzhinskiy. Cambridge [England]: Cambridge University Press, 1991.
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Listing of thesis titles by keyword: B.Sc (honours), M.Sc, and Ph.D. : James Cook University of North Queensland, Geology Department, 1969-1985. [Townsville, Qld.]: Geology Dept., James Cook University of North Queensland, 1986.
Знайти повний текст джерелаЧастини книг з теми "Honours; Geology"
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Good, Gregory A. "John Herschel’s Geology: The Cape of Good Hope in the 1830s." In The Romance of Science: Essays in Honour of Trevor H. Levere, 135–50. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58436-2_8.
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Nēmec, Václav. "Introduction." In Computers in Geology - 25 Years of Progress. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195085938.003.0006.
Повний текст джерелаАнотація:
Friends and associates of Daniel F. Merriam have prepared this volume in Dan's honor to commemorate his 65th birthday and mark the 25th anniversary of the International Association for Mathematical Geology. This compendium is in the tradition of the Festschriften issued by European universities and scholarly organizations to honor an individual who has bequeathed an exceptional legacy to his students, associates, and his discipline. Certainly Dan has made such an impact on geology, and particularly mathematical geology. It is a great privilege for rne to write the introduction to this Festschrift. The editors are to be congratulated for their idea to collect and to publish so many representative scientific articles written by famous authors of several generations. Dan Merriam is the most famous mathematical geologist, in the world. This statement will probably provoke some criticism against an over-glorification of Dan. Some readers will have their own candidates (including themselves) for such a top position. I would like to bring a testimony that the statement is correct and far from an ad hoc judgment only for this solemn occasion. It may be of interest to describe how I became acquainted with Dan. In my opinion this will show how thin and delicate was the original tissue of invisible ties which helped to build up the first contacts among Western and Eastern colleagues in the completely new discipline of mathematical geology. The role of Dan Merriam in opening and increasing these contacts has been very active indeed. In the Fall 1964 I was on a family visit in the United States. This was— after the coup of Prague in 1948—my first travel to the free Western world. With some experience in computerized evaluation of ore deposits, I was curious to see the application of computers in geology and to meet colleagues who had experience with introducing statistical methods into regular estimation of ore reserves. I had very useful contacts in Colorado and in Arizona. In Tucson I visited the real birthplace of the APCOM symposia.
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Emery, K. O., and David A. Ross. "Past and Future Evolution of Marine Geology." In From Shoreline to AbyssContributions in Marine Geology in Honor of Francis Parker Shepard. SEPM Society for Sedimentary Geology, 1991. http://dx.doi.org/10.2110/pec.91.09.0011.
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Bushey, Jonathan C., Arthur W. Snoke, Calvin G. Barnes, and Carol D. Frost. "Geology of the Bear Mountain intrusive complex, Klamath Mountains, California." In Geological Studies in the Klamath Mountains Province, California and Oregon: A volume in honor of William P. Irwin. Geological Society of America, 2006. http://dx.doi.org/10.1130/2006.2410(14).
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DEMCHUK, THOMAS D., and ANTHONY C. GARY. "Geologic Problem Solving with Microfossils: A Volume in Honor of Garry D. Jones." In Geologic Problem Solving with Microfossils, 5–6. SEPM (Society for Sedimentary Geology), 2009. http://dx.doi.org/10.2110/sepmsp.093.005.
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Callahan, O. A., Peter Eichhubl, and J. R. Kyle. "Geology and hydromechanical properties of the basement-sediment interface, Llano Uplift, Central Texas." In The Geologic Basement of Texas: A Volume in Honor of Peter T. Flawn. University of Texas at Austin, Bureau of Economic Geology, 2021. http://dx.doi.org/10.23867/ri0286c8.
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Callahan, O. A., K. M. Smye, E. A. Horne, Peter Eichhubl, and Carolyn Breton. "The structure of the geologic basement in Texas." In The Geologic Basement of Texas: A Volume in Honor of Peter T. Flawn. University of Texas at Austin, Bureau of Economic Geology, 2021. http://dx.doi.org/10.23867/ri0286c2.
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Savvaidis, Alexandros, P. H. Hennings, Cliff Frohlich, Peter Eichhubl, E. A. Horne, Dino Huang, and O. A. Callahan. "Seismogenic environment of the geologic basement of Texas." In The Geologic Basement of Texas: A Volume in Honor of Peter T. Flawn. University of Texas at Austin, Bureau of Economic Geology, 2021. http://dx.doi.org/10.23867/ri0286c9.
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Peterson, Curt D., Mark E. Darienzo, Don J. Pettit, Phillip L. Jackson, and Charles L. Rosenfeld. "Littoral-Cell Development in the Convergent Cascadia Margin of the Pacific Northwest, USA." In From Shoreline to AbyssContributions in Marine Geology in Honor of Francis Parker Shepard. SEPM Society for Sedimentary Geology, 1991. http://dx.doi.org/10.2110/pec.91.09.0017.
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Best, Tim C., and Gary B. Griggs. "A Sediment Budget for the Santa Cruz Littoral Cell, California." In From Shoreline to AbyssContributions in Marine Geology in Honor of Francis Parker Shepard. SEPM Society for Sedimentary Geology, 1991. http://dx.doi.org/10.2110/pec.91.09.0035.
Повний текст джерелаТези доповідей конференцій з теми "Honours; Geology"
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Bodalski, Joe, Victoria Deniken, Matt King, and Daniel Childers. "PHYSICAL GEOLOGY HONORS PROJECT: USING GIS TO MAP THE DELAWARE COUNTY COMMUNITY COLLEGE CAMPUS LANDSCAPE." In 67th Annual Southeastern GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018se-310678.
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Childers, Daniel. "UNDERGRADUATE STUDENT RESEARCH ON A SHOESTRING BUDGET: GEOLOGY HONORS OPTION AT DELAWARE COUNTY COMMUNITY COLLEGE." In 67th Annual Southeastern GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018se-311413.
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Phillips, C. Dianne, and Nathan Sorey. "USING ESRI ONLINE APPLICATIONS AND GEOSCIENCE DATA IN CAPSTONE PROJECTS FOR HONORS GEOLOGY: 2Y COLLEGE." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-300995.
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McGarvey, Aaron, Kelly Monaghan, Erin McCone, and Daniel P. Childers. "STREAM PROJECT BY PHYSICAL GEOLOGY HONOR STUDENTS AT DELAWARE COUNTY COMMUNITY COLLEGE." In Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-291138.
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McCone, Erin, Kelly Monaghan, Aaron McGarvey, and Daniel P. Childers. "STREAM PROJECT BY PHYSICAL GEOLOGY HONOR STUDENTS AT DELAWARE COUNTY COMMUNITY COLLEGE." In 66th Annual GSA Southeastern Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017se-291102.
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Pandey, Vibhas J. "Applications of Geomechanics to Hydraulic Fracturing - Case Studies from Coal Stimulations." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173378-ms.
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Abstract Modern hydraulic fracture treatments rely heavily on the implementation of formation property details such as in-situ stresses and rock mechanical properties, in order to optimize stimulation designs for specific reservoir targets. Log derived strain and strength calibrated in-situ properties provide critical description of stress variations in different lithologies and at varying depths. From a practical standpoint however, most of the hydraulic fracture simulators that are used for fracturing treatment design purposes today can accommodate only a limited portion of a geologic-based rock mechanical property characterization which targets optimal data integration thus resulting in complexity. By using examples from hydraulic fracture stimulations of coals in a complex but well characterized stress environment (Surat Basin, Eastern Australia) we distil out the reservoir rock related input parameters that are determinants of hydraulic fracture designs and identify those that are not immediately used. In order to understand the impact on improving future fracture stimulation designs, the authors present workflows such as pressure history matching of fracture stimulation treatments and the calibration process of key rock mechanical parameters such as Poisson's ratio, Young's modulus, and fracture toughness. The authors also present examples to discuss synergies, discrepancies and gaps that currently exist between ‘geologic’ geomechanical concepts (i.e. variations in the geometry and magnitude of stress tensors and their interaction with pre-existing anisotropies) in contrast to the geomechanical descriptions and concepts that are used and implemented in hydraulic fracturing stimulations. In the absence of a unifying hydraulic fracture design that honors well established geologic complexity, various scenarios that allow assessing the criticality, usefulness and weighting of geologic/mechanical property input parameters that reflect critical reservoir complexity, whilst maintaining applicability to hydraulic fracturing theory, are presented in the paper. Ultimately it remains paramount to constrain as many critical variables as realistically and uniquely possible. Significant emphasis is placed on reservoir-specific pre-job data acquisition and post-job analysis. The approach presented in this paper can be used to refine hydraulic fracture treatment designs in similar complex reservoirs worldwide.
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Oliveira, Jansen, Karl Perez H., Alejandro Martin V., Ricard Fernandez T., Teresa Polo N., Lorenzo Villalobos V., Francois Xavier Dubost, et al. "DEEP TRANSIENT TESTING DIGITAL PRODUCTS CREATE NOVEL REAL-TIME RESERVOIR INSIGHTS." In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0027.
Повний текст джерелаАнотація:
Offshore exploration requires the evaluation of hydrocarbon presence, estimation of volumes in place, and flow potential. To this capacity, formation testers are widely used to determine static data such as reservoir fluid gradients and reservoir pressure, obtain fluid samples, and to assess reservoir connectivity. Dynamic data, acquired with interval pressure transient testing and well testing techniques, are used to assess reserves and productivity. However, these evaluation techniques provide dynamic data at different resolution and length scales, and with different environmental footprint, cost, and operational constraints. A new wireline formation testing technique known as deep transient testing (DTT) has been introduced, which combines high-resolution measurements, higher flow rates, and longer test durations to perform transient tests in higher permeability, thicker formation, and at greater depth of investigation than with previous formation testers—without flaring and at a low carbon footprint. The platform combines advanced metrology with extensive automation to generate unique, real-time reservoir insights. Traditionally, pressure transient analysis and well deliverability predictions were produced through an analytical framework. Today, deep transient testing measurements are interpreted, and placed in reservoir context, in real-time by integration with geological and reservoir models. These steps can be performed from any wellsite utilizing cloud-based resources. Products such as reservoir fluid compressibility, saturation pressure, equation of state (EOS) models, well productivity, or minimum connected volumes are integrated in real-time interpretation utilizing numerical analysis. The digital infrastructure enables key reservoir insights to be shared between all stakeholders in a transparent and collaborative environment for both operational control and rapid decision making. This paper presents a case study where the new DTT technique was combined with numerical analysis and real-time integrated workflows to characterize a multilayer reservoir in a recent discovery in deepwater Mexico. During the drawdown phase of the DTT operation, real-time downhole fluid analysis was used to determine the fluid composition, density, viscosity, compressibility, and saturation pressure. These fluid properties were then used to generate and tune an EOS model. Accurate drawdown flow rate measurements and the subsequent pressure transients were combined with the fluid model and geologic model to enable integrated pressure transient history matching. The resulting calibrated numerical model honors the fluid measurements and geologic model and was used to predict the permeability profile, zonal producibility, and the volume of influence of the test.
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Hernandez, Erika, Suzanne Boekhout, Gijs van Essen, Bert-Rik de Zwart, Nuha Al-Sultan, Basel Al-Otaibi, Adrian Crawford, Michael Obermaier, and Ben Dewever. "The Sabriyah Mauddud Dynamic Model Rebuild – Tackling the History Match of a Giant and Complex Carbonate Reservoir Through a Tailored-Made Sector-Centered History Match Approach." In SPE Reservoir Characterisation and Simulation Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/212586-ms.
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Abstract This work presents the application of a fit-for-purpose history match workflow to a giant and geologically complex carbonate reservoir with over 60 years of production/injection history and 600+ wells. The target was to deliver, within schedule and spec, a high-quality sizeable model (15+ million grid blocks) that honored the underlying geologic characteristics and reproduced the distinctive production mechanisms present across the different regions of the reservoir, while keeping parametrization of uncertainties at a manageable level. Practical implementation routes were applied to efficiently translate key reservoir plumbing elements and other identified subsurface uncertainties into dynamic modeling components that could be investigated over large uncertainty ranges via Assisted History Matching (AHM) tools. To manage the history match process of this vast and mature reservoir, a sophisticated and custom-tailored sector-centered modeling scheme was adopted based on a "Divide & Conquer" approach. This tactic divides the big history match problem into smaller more manageable pieces, allowing for simultaneous history match of different sectors by different engineers while having frequent reassembling of sectors into a full-field model to ensure alignment, preserve consistent reservoir behaviors, and update (flux) boundary conditions. The iterative sector-based history match scheme applied to the giant field dynamic model made it possible to achieve a good history match within the given time and IT resources available to carry out the history match. The new dynamic model respects the conceptual understanding of the reservoir behavior and honors the available subsurface and production data of approximately 80% of the individual wells within the desired history match criteria. The use of the sector modeling workflow approach in a large full field model, allowed for faster turnaround of results for history matching purposes. The applied workflow also demonstrated that achieving a good history match in the individual sectors also resulted in a good history match for the full field model, achieved in a faster way. The final model respects the conceptual understanding of reservoir behavior as well as honors the available performance data at a scale which allows not only more reliable production forecasts but also model-based pattern-level waterflood optimization and its use for well location optimization (WLO) studies. The model supports development planning and reservoir management decisions (20+ new wells drilled annually), with waterflooding aiming to increase ultimate recovery by more than 20%. The methodology allowed significant time-savings to deliver the dynamic model within a relatively short schedule (~9 months) and required quality specifications. The successful application of the custom-made history match workflow is currently being replicated in other reservoirs of similar scale and complexity in North Kuwait and could also be applied to other massive reservoirs around the world. This work also illustrates a good example of achieving excellent HM results while keeping the parametrization of uncertainties as practical as possible.
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Alqallabi, Salahaldeen, Abdul Saboor Khan, Anish Phade, Mohamed Tarik Gacem, Mustapha Adli, Faisal Al-Jenaibi, Sheharyar Mansur, Lyes Malla, and Dario Benedictis. "An Integrated Ensemble-Based Uncertainty Centric Approach to Address Multi-Disciplinary Reservoir Challenges While Accelerating Subsurface Modeling Process in an Onshore Field, Abu Dhabi, UAE." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205854-ms.
Повний текст джерелаАнотація:
Abstract The aim of this study is to demonstrate the value of a fully integrated ensemble-based modeling approach for an onshore field in Abu Dhabi. Model uncertainties are included in both static and dynamic domains and valuable insights are achieved in record time of nine-weeks with very promising results. Workflows are established to honor the recommended static and dynamic modeling processes suited to the complexity of the field. Realistic sedimentological, structural and dynamic reservoir parameter uncertainties are identified and propagated to obtain realistic variability in the reservoir simulator response. These integrated workflows are used to generate an ensemble of equi-probable reservoir models. All realizations in the ensemble are then history-matched simultaneously before carrying out the production predictions using the entire ensemble. Analysis of the updates made during the history-matching process demonstrates valuable insights to the reservoir such as the presence of enhanced permeability streaks. These represent a challenge in the explicit modeling process due to the complex responses on the well log profiles. However, results analysis of the history matched ensemble shows that the location of high permeability updates generated by the history matching process is consistent with geological observations of enhanced permeability streaks in cores and the sequence stratigraphic framework. Additionally, post processing of available PLT data as a blind test show trends of fluid flow along horizontal wells are well captured, increasing confidence in the geologic consistency of the ensemble of models. This modeling approach provides an ensemble of history- matched reservoir models having an excellent match for both field and individual wells’ observed field production data. Furthermore, with the recommended modeling workflows, the generated models are geologically consistent and honor inherent correlations in the input data. Forecast of this ensemble of models enables realistic uncertainties in dynamic responses to be quantified, providing insights for informed reservoir management decisions and risk mitigation. Analysis of forecasted ensemble dynamic responses help evaluating performance of existing infill targets and delineate new infill targets while understanding the associated risks under both static and dynamic uncertainty. Repeatable workflows allow incorporation of new data in a robust manner and accelerates time from model building to decision making.
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Ashayeri, Cyrus, and Birendra Jha. "Assessment of Unconventional Resources Opportunities in the Middle East Tethyan Petroleum System in a Transfer Learning Context." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207723-ms.
Повний текст джерелаАнотація:
Abstract Decision making in new fields with little data available relies heavily on physics-based simulation models. However, due to a lack of full understanding of the physical processes governing flow in the unconventional resources, data-driven modeling has emerged as an alternative and complimentary tool to create recovery forecasts that honor the available data. Transfer Learning provides an opportunity to start early-stage analysis of the asset before adequate data becomes available. New challenges in the energy industry as well as shifting dynamics in both domestic and global supply and demand has encouraged some of the petroleum exporting countries in the Middle East to strategize the development of unconventional resources. In this research we have developed a data-driven Transfer Learning framework that allows the basin-wide assessment of new shale gas and tight oil prospects. The proposed Transfer Learning method is developed on real-world data from several thousand horizontal multistage wells in the Eagle Ford super-basin in South Texas. In this method we have integrated reservoir engineering domain expertise in the data pre-processing and feature generation steps. We have also considered the temporal and spatial balancing of the training data to assure that the predictive models honor the real practice of unconventional field development. Our full cycle Transfer Learning workflow consists of dimensionality reduction and unsupervised clustering, supervised learning, and hyperparameter fine-tuning. This workflow enables reservoir engineers to experiment with multiple hypothetical scenarios and observe the impact of additional data in the learning process. We use the developed workflow to examine the performance of a data-driven model of the Eagle Ford Basin on potential plays in the Middle East. Existence of all liquid types of oil, condensate and dry gas in the Eagle Ford has resulted in training a model flexible enough to be tested on various types of assets in a new location. We first present the successful deployment of our model within the Eagle Ford. Next, we use the information from major formations such as Tuwaiq Mountain and Hanifa and show the value of a pre-existing model from a fully-developed shale play on achieving acceptable accuracies with minimal information available in a new field. Our model is developed by data types with relatively low resolution that minimizes overfitting effects and allows generalization to different geologies with basin-wide accuracy. This approach allows conducting accelerated assessment of various sections of a large asset to enhance field development planning processes. This is a first example of such an effort on a basin scale that examines the effectiveness of Transfer Learning on some of the major unconventional plays in the Middle East region. This workflow allows investigating the relationship among geologic and petrophysical variables, drilling and completion parameters, and productivity of a large group of wells in a new asset.