名古屋大学年代測定総合研究センターシンポジウム報告

The Fox River Belt forms a segment of the Circum-Superior Belt that comprises a series of ca. 1900 Ma volcanosedimentary belts located around the margins of the Superior Province. The Fox River Belt is a north-facing homoclinal sequence, composed of a rift-related sedimentary sequence, intercalated with thick sequences of komatiites and tholeiites, and intruded by mafic-ultramafic intrusions. Geological mapping, whole rock geochemistry and S, Nd- and Hf-isotope geochemistry of the magmatic and sedimentary units within the belt were used to obtain a better understanding of the magmatic and tectonic history of the belt and its relation with other segments of the Circum-Superior Belt. The compositional variation observed in the volcanic rocks (19% to 5% MgO) can be accounted for as the product of fractional crystallization. Trace element patterns as well as εNd and εHf values (-4 to +8 and +4 to +18 respectively) indicate that the magmatism within the belt was the product of partial melting of depleted mantle that was locally contaminated with sediments or gneiss. A plume origin for this melting event is proposed based on the high degree of partial melting, the large volume of magma, and the presence of a radiating dyke swarm. The 250 km long Fox River Sill appears to have behaved as a magma conduit during part of its history. Several intervals within the sill show enrichment and depletion of PGE. The KO Zone PGE-Cu-Ni mineralization (up to 5ppm PGE) formed from magmatic sulphides whose tenor was upgraded by the upward percolation of evolved intercumulus magma. Contaminated Lower Intrusions and the lower margin of the Fox River Sill are considered particularly prospective for hosting Ni- Cu-PGE mineralization.

Thesis (M.S.)--Rochester Institute of Technology, 1988. / Includes bibliographical references and appendixes.

Thesis (M. Sc.)--School of Geosciences, Faculty of Science, University of Sydney, 2004. / Bibliography: leaves 80-87.

Thesis (M. Sc.)--University of Sydney, 2004. / Title from title screen (viewed 14 May 2008). Submitted in fulfilment of the requirements for the degree of Master of Science to the School of Geosciences, Faculty of Science. Includes bibliographical references. Also available in print form.

Thesis (Ph. D.)--Curtin University of Technology, 2004. / Title from PDF title page (viewed on May 8, 2005). "Submitted July 2004." "10th March 2005"--2nd unnum. p. after t.p. Includes bibliographical references (p. 451-467).

M.Ing. (Engineering Management) / In a tender bid to energy and chemical company Sasol, a request to offer a technical solution for a two-flight overland conveyor system whose function is to transport coal from a 15 000 tonne bunker into an external stockpile storage facility in the plant was made. This conveyor consisted of two conveyor flight sections of lengths 18 423m and 8 537m each. The prospect of combining the two flights of conveyors to form one, super-efficient conveyor structure with additional cost saving benefits was identified. It was found that this occurrence was not unique to the individual project as other researching engineers have been faced with similar problems before [18]. This then lead the researcher into believing that there could be some advantage in investigating the possible benefits to the overall cost, maintainability and scheduling of the fabrication and erection activities for the entire project of combining the multiple flight conveyors into a single-flight conveyor. It is also the conviction of the researcher that the achieved outcomes will prove beneficial to the bulk materials handling industry as a whole. The problem is traditionally short, multiple flight conveyors have always been used for performing the function of transporting bulk material from one location in a mining plant to another hence; long, single-flight overland conveyors of lengths exceeding 26 km have not been commonly installed. In this dissertation the possibility of employing a single-flight overland as opposed to a two-flight conveyor in the Sasol Impumelelo coal plant is investigated. This is done against the work of other researchers who have conducted similar studies in the field as well as by utilizing project-specific data using applicable industry standards as well as Engineering Management course theory. By employing actual project procurement and engineering design data; the investigation is done by calculating and comparing the individual capital and operational costs that encompass the total cost of ownership (TCO) for both conveyor systems as well as the two systems’ reliability, availability and maintainability to establish each system’s complete life cycle costs. It is the opinion of the researcher that the investigation method is valid as it is in line with the guidelines given by The Miami University of Ohio [24] as well as J Hanek [25] and thus provides the researcher with a plausible technique for establishing which between the single-flight overland conveyor and two-flight overland conveyor configurations is overall the more superior system to install. It was found that even though its initial capital and operational costs are higher; the single-flight conveyor system is more reliable, readily available and cheaper to run and sustain over the 30 year expected life-span of the plant. It also is less labour intensive to perform maintenance on, yields less material degradation and results in less material spillage because of the elimination of additional transfer points and transfer towers. These results can be taken as valid on a global scale, for any mining plant, not restricted to any specific material as they are not subject to South African temperature, altitude or seismic conditions nor are they constrained to the type of bulk material being mined.

The Coquihalla Serpentine Belt extends north-northwest forty miles from a point southeast of Hope, British Columbia to just south of Boston Bar. Sections of the northern part of this belt and the surrounding rocks from Spuzzum to Boston Bar were mapped. The serpentine belt here consists of partially serpentinized harzburgite with generally more intense serpentinization toward the margins. North of a point east of Spuzzum the belt is found entirely within the probable Permian Hozameen Group of spilitic lava and tuff, chert, and argillite. South of the point where mapped, the serpentine is found between the Hozameen and Jurassic to Lower Cretaceous Ladner Group of predominantly slate with some graywacke. Several sills and a small stock of granitic rock were found in the mapped areas. Field evidence and laboratory data favor intrusion of the material in the serpentine belt into a pre-existing fault either by plastic deformation of solid harzburgite or by squeezing up in the fault. Serpentinization occurred probably during intrusion and most likely involved a volume for volume reaction whereby water from outside was added to the harzburgite and silica and magnesia were carried away. The volcanic and sedimentary rocks of the area show the effects of low grade regional metamorphism. Minerals formed include albite, epidote, calcite, stilpnomelane and tremolite-actinolite. Much of the albite in the spilitic rocks is believed to have formed from a more calcium-rich feldspar whereby the sodium was derived from water and/or included sediments during or after extrusion. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

D.Phil. (Geology) / Please refer to full text to view abstract

This work has a design character, deals with the design of machine for grinding fiberglass belts. Contains machine design proces, the individual assemblies and the way the machine works. A part of the solution is creating 3D model of machine.