Thesis (B.Sc. (Hons.))--University of Adelaide, Dept. of Geology, 1986? / 1 folded chart in back pocket. Includes bibliographical references.

Orientador: Maria Margarita Torres Moreno / Banca: Antenor Zanardo / Banca: Jairo Roberto Jiménez Rueda / Banca: Samuel Toffoli / Banca: José Francisco Marciano Motta / Resumo: O Pólo Cerâmico da cidade de Santa Gertrudes localizado na faixa de afloramentos da Formação Corumbataí (NeoPermiano da Bacia do Paraná) é considerado atualmente o maior do país no segmento de revestimento cerâmico. Por ocupar posição de destaque no cenário nacional e internacional, o Pólo necessita de trabalhos específicos que direcionem as empresas instaladas na região na busca da matéria-prima adequada ao seu processo cerâmico. Com este intuito a presente tese teve como objetivo principal identificar as principais litofácies da Formação Corumbataí visando sua aplicação cerâmica. As litofácies reconhecidas na área estudada foram classificadas em duas associações: Associação Siltito Argiloso e Associação Siltito Arenoso. A Associação Siltito Argiloso é constituída pelas litofácies Maciça, Laminada e Alterada e a Associação Siltito Arenoso pelas litofácies Intercalada I e Intercalada II. Estas duas associações foram cartografadas na escala 1:50.000. A Análise Estatística Multivariada de Agrupamento e a Análise Estatística Univariada (Análise de Superfície de Tendência) demonstraram ser ferramentas importantíssimas no tratamento de dados de caracterização cerâmica. A aplicação da Análise de Agrupamento permitiu tecer uma relação entre as características cerâmicas com as faciológicas. Os mapas resultantes da aplicação da Análise Estatística Univariada revelaram importantes resultados na distribuição das médias da composição química e cerâmica nas jazidas ao longo da área de estudo. / Abstract: Santa Gertrudes Ceramic Cluster, located in the outcrops series of Corumbataí Formation (NeoPermian of Paraná Basin), is considered currently the biggest in national level concerning about floor tiles. As this cluster is a highlight in national and international scene, it needs specific projects in order to guide the industries settled in the region in the quest of the adequate raw material to the ceramic process. Pursuing this purpose the present thesis had as main objective to identify the principal lithofacies from Corumbataí Formation for ceramic uses. The lithofacies recognized in the studied area were rated in two associations (Clay Siltstone Association and Sand Siltstone Association). The Clay Siltstone Association is represented by the Massive, Laminated and Altered lithofacies, and the Sand Siltstone Association is represented by the Intercalated I and Intercalated II lithofacies. These two associations were mapped in a 1:50,000 scale. The Grouping Multivariated Statistical Analysis and the Univariated Statistical Analysis (Trend Surfaces Analysis) proved to be very important tools in the data treatment of ceramic characterization. The application of the grouping Analysis enabled to settle a relation between the ceramic characters and the faciological characters. The resulting maps from the application of the Univariated Statistical Analysis revealed important results in the media distribution of the chemical and ceramic composition in the mines along the studied area. / Doutor

The Mesaverde Group, Uinta Basin, Utah, is the source of significant natural gas production and contains several trillion cubic feet of undiscovered natural gas resources. Tight-gas sandstone reservoirs within the Mesaverde Group require hydraulic fracture treatments in order to produce economic volumes of gas. The nature of the natural fracture network is examined here using scanline sampling, image-log, well-log, core, and microstructural analyses to evaluate and model the potential connectivity of hydraulically induced fractures to natural fractures in the subsurface. Regional fracture sets include subvertical sets with dominant orientations of: N-S (006° - 015°), NE (045° - 059°), NNW (326° - 342°) and a WNW (271° - 286°). Sedimentologic and diagenetic characteristics of seven sandstone lithofacies control the fracture development and distribution in the Mesaverde Group. Key sedimentologic and diagenetic influences on fracture distribution include bed thickness, stratigraphic architecture, the degree of cementation and the type of cement. From outcrop and core analysis, discontinuous, well-cemented sandstone have a higher fracture density when compared with continuous, tabular bedded sandstone units and friable sandstone units. Based on the sedimentologic and diagenetic controls on the character of natural fractures, lithofacies can be used to predict fracture distribution within the Mesaverde Group based on environments of deposition. Sandstones deposited in braided river environments appear to have lower fracture densities than sandstones deposited in meandering fluvial environments. Northwesterly trending, discontinuous sandstone reservoirs were deposited in meandering fluvial environments, are highly fractured by a pervasive WNW-striking fracture helps to explain fairways of prolific natural gas production within the Greater Natural Buttes field.

Thesis (M.S.)--Bowling Green State University, 2006. / Document formatted into pages; contains xiv, 177 p. : ill., maps. Includes bibliographical references.

No description available.

Thesis (Ph.D.)--University of Adelaide, Australian School of Petroleum, 2005? / "October 2004" Includes bibliographical references (leaves 280-291).

The study area is located in central Columbia County and encompasses approximately 373 square kilometers. The purpose of the study was to map lithofacies to a scale of 1:31250, study the petrography of the lithofacies, determine the stratigraphy, and develop a model for environment of deposition of the Scappoose Formation.

The Hickory Sandstone Member of the Riley Formation is dominantly quartz sandstone up to 167 m thick which crops out in the Llano Uplift region of central Texas and dips away in all directions. It lies unconformably upon the irregular surface of the Precambrian Texas craton. The association of isopach thicks and thins over cratonic lows and highs demonstrates topographic control of Hickory deposition. Regional subsurface studies delineate the extent of the overlying Cap Mountain Limestone. Beyond the limits of the Cap Mountain, the Hickory grades into the Lion Mountain Sandstone laterally and vertically so that correlations are difficult. The six lithofacies of the Hickory Sandstone were deposited as nonbarred tidally-influenced or estuarine-related equivalents to deposits of Holocene environments. Outer estuarine tidal channel-shoal deposits display abundant channel fills of large-scale foresets, parallel bedded sandstone, and minor siltstone. Trilobite trackways (Cruziana) and resting traces (Rusophycus) occur in these deposits, associated with U-shape burrows (Diplocraterion and Corophioides). Deposits of open coast sandy tidal flats display upward-fining character, medium-to large-scale festoon crossbedding, abundant small-scale ripple bedforms of all types, and mudcracks. These deposits include the U-shape burrows, Corophiodes, and the trackway, Climactichnites. Deposits of inner estuarine tidal channels and tidal flats display upward-fining character, wavy-lenticular bedding, bimodal paleocurrent patterns, and the resting trace, Pelecypodichnus. All of these deposits prograded as a unit until sea level rise shut off sediment supply. Progradation of tidal channel and shoal sediments was renewed. These deposits are festoon crossbedded hematitic sandstone with wavy-lenticular bedding and abundant fossil debris. Storm energy funneled through tidal channels deposited crossbedded sandstone onto the nearshore inlet-influenced shelf. Final Hickory deposits and initial Cap Mountain deposits were storm-dominated, burrowed and laminated calcitic shelf sands. / text

The purpose of this study was to define the lithofacies and areal extent of the Fort Atkinson Formation (Maquoketa Group, Upper Ordovician) in the subsurface in Indiana. Two distinct lithologic facies (Members) of the Fort Atkinson Formation can be distinguished in the subsurface. The upper Shoaling Member consists of coarse grained crinoid-bryzoan grainstone deposited in a high energy depositional environment. Beneath the Shoaling Member is the Transition Member of the Fort Atkinson. This Member consists of alternating beds of shale and limestone which were deposited in depositional environments that varied from high to low energy. The Fort Atkinson is an important stratigraphic marker used to define four depositional provinces within the Maquoketa Group in Indiana. The four depositional provinces include the Maquoketa Shelf, the Overlap Ramp. the Cincinnati Shelf, and Michigan Shelf. / Department of Geology

Thesis (M.S.)--Oregon State University, 1998. / Typescript (photocopy). Includes bibliographical references (leaves 228-234). Also available on the World Wide Web.