Since the relatively recent discovery of elevated concentrations of contaminants such as mercury and persistent organic pollutants in the Arctic, Inuvialuit have been receiving information about the potential impacts of these contaminants on the environment, wildlife, and human health. Almost 20 years of communication efforts have resulted in only a general awareness of contaminant issues, as the focus on perceptions of message content has overlooked the important impact of communication processes (methods, sources) on message reception, understanding, and acceptance. For this research, interviews, focus groups, and informal conversations were used to explore the myriad of contaminant perceptions and associations held by Inuvialuit in Sachs Harbour, NT, as contaminants were used as a case example to investigate perceptions of and recommendations for science communication. Concepts of respect, time, and relationships influenced the inter-related impressions of communication processes and research/researchers (the mediums), which in turn influenced perceptions of contaminants among participants. The medium is thus an important part of the message in scientific communication, and is implicated in the conduct of research and research communication in small, remote Arctic communities.

The Drybones Bay kimberlite has offered an opportunity to compare geophysical observations of the mantle lithosphere beneath the southwest Slave craton with geochemical and petrological interpretations through mantle xenoliths and xenocrysts. Coarse-textured garnet and spinel-garnet peridotite xenoliths, and garnet and garnetclinopyroxene xenocrysts were analyzed for a suite of trace elements. The Ni-in-garnet geothermometer (Canil, 1999) yielded equilibration temperatures between 850-1200 DC, and corresponding depths of 90-160 km, assuming a 41m Wm-2 paleogeotherm. This method estimates the thickness of the southwest Slave craton in the Ordovician at approximately 160 km, within the stability field of diamond. Trace element analysis revealed a distinct geochemical anomaly at a depth of approximately 120 km, which marks the transition from wehrlite to metasomatized wehrlite and lherzolite. This anomalous depth has been observed in geophysical studies, and has been interpreted as a structural discontinuity. / Graduate / 0372

Thesis (M. Phil.)--University of Hong Kong, 1992.

Thesis (M.A.)--University of Hong Kong, 1966. / Also available in print.

Thesis (M.A.)--University of Hong Kong, 1961. / Also available in print.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1968. / Vita. Thesis consists entirely of an article reprinted from Ecological monographs 35 : 37-59. Winter, 1965. [Madison] Department of Meteorology, University of Wisconsin, 1965. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Ce travail de thèse propose d'analyser la communication autour et à propos des parcs nationaux en mettant en avant les jeux d'acteurs, les rapports de force et les stratégies de communication employées. Les conflits récurrents dans la création et la gestion des parcs nationaux et l'évolution du contexte politique ont entraîné une prise en compte accrue des acteurs locaux par les promoteurs des parcs. Il s'agit de montrer la place de ces acteurs, notamment au travers de la communication des établissements publics des parcs nationaux et des dispositifs participatifs mis en place. Cette thèse s'attache également à montrer les enjeux territoriaux des parcs nationaux. Ces « espaces protégés » participent à la construction et à la promotion des territoires. Le « label parc national » distingue la valeur environnementale du territoire. Enfin, nous proposons de saisir la politique des parcs nationaux au travers de la construction de l'environnement comme secteur d'intervention publique et au travers des conceptions de la nature et de sa protection. Les politiques de communication des parcs concilient ainsi la patrimonialisation de la nature et le développement durable. / This thesis proposes to analyze the communication around and about national parks highlighting the actors' strategies, power relations and communication strategies used. Recurrent conflicts in the creation and management of national parks and political developments have led to increased consideration of local actors by proponents of the parks. This research shows the role of these actors, particularly through the communication of public institutions of national parks and participatory mechanisms that are implemented. This thesisalso attempts to show territorial issues of national parks. These "protected areas" contribute to the construction and promotion of the territories. The "national park label" distinguishes the environmental value of the territory. Finally, we propose to understand politics of national parks through the construction of the environment as public intervention sector and throughthe approches of nature and its protection. Therefore, parks' communication policies reconcile the nature patrimonialization and sustainable development.

The Taglu is introduced as a new member of the Reindeer Formation. Its type section is in the Taglu G-33 well and its age is Eocene. This member conformably overlies the Aklak Member and underlies the "Un-named shale" or the "Kugmallit" member. The thickness of the Taglu varies from well to well but in the type section it is 800 ft. (268 m). Correlation of the Taglu Member is difficult due to facies changes, similarity in composition of successive facies, faulting, and the absence of marker beds or diagnostic fauna. Correlation, however, was accomplished through seismic interpretation, sedimentary megacycles, trace elements, biology, gamma-ray logs and logic. The Taglu Member was deposited under cool but occasionally warm temperate climatic conditions and is composed of two main deltaic sequences, each represented by a regressive phase overlain by a transgressive phase. Each sequence includes environments such as prodelta, delta front, distributary mouth bars, marshes and swamps, and finally distributary channels on top. The depositional basin during accumulation was undergoing moderate subsidence and receiving a high influx of sediments. Both the Richardson Mountains and the Eskimo Lakes Arch supplied, at least in part, the Taglu sediments. Occasional presence of volcanic rock fragments may indicate a third source, possibly well to the south. Based on its composition, the Taglu sandstone can be classified as quartz arenite and sublitharenite. It consists of quartz, chert, feldspar, mica, rock fragments, woody herbaceous matter, and cementing material. The cementing material includes non-ferroan calcite, ferroan and non-ferroan dolomite, siderite, silica and authigenic clay minerals. The cement, which is mainly controlled by the environment of deposition, is eodiagenetic and in places mesodiagenetic.

Ce travail de thèse propose d'analyser la communication autour et à propos des parcs nationaux en mettant en avant les jeux d'acteurs, les rapports de force et les stratégies de communication employées. Les conflits récurrents dans la création et la gestion des parcs nationaux et l'évolution du contexte politique ont entraîné une prise en compte accrue des acteurs locaux par les promoteurs des parcs. Il s'agit de montrer la place de ces acteurs, notamment au travers de la communication des établissements publics des parcs nationaux et des dispositifs participatifs mis en place. Cette thèse s'attache également à montrer les enjeux territoriaux des parcs nationaux. Ces « espaces protégés » participent à la construction et à la promotion des territoires. Le « label parc national » distingue la valeur environnementale du territoire. Enfin, nous proposons de saisir la politique des parcs nationaux au travers de la construction de l'environnement comme secteur d'intervention publique et au travers des conceptions de la nature et de sa protection. Les politiques de communication des parcs concilient ainsi la patrimonialisation de la nature et le développement durable. / This thesis proposes to analyze the communication around and about national parks highlighting the actors' strategies, power relations and communication strategies used. Recurrent conflicts in the creation and management of national parks and political developments have led to increased consideration of local actors by proponents of the parks. This research shows the role of these actors, particularly through the communication of public institutions of national parks and participatory mechanisms that are implemented. This thesisalso attempts to show territorial issues of national parks. These "protected areas" contribute to the construction and promotion of the territories. The "national park label" distinguishes the environmental value of the territory. Finally, we propose to understand politics of national parks through the construction of the environment as public intervention sector and throughthe approches of nature and its protection. Therefore, parks' communication policies reconcile the nature patrimonialization and sustainable development.

A study of Precambrian sedimentary rocks belonging to Division three of the Yellowknife group has been made. Samples for this study were obtained from an area 2 miles north of the northeast arm of Russel Lake near the granite contact. The rocks are greywacke, arkose and phyllite that have suffered low grade regional metamorphism. Shear zones that parallel the strike of the sediments have provided channelways for mineralizing solutions so that these zones now constitute mineral deposits important for their gold content. The shear zones contain, in addition to quartz and sulphides, an intergrowth of grunerite and hornblende similar to that found in the iron-bearing district of Lake Superior. This amphibole intergrowth is particularly well developed in an assemblage of thinly banded sediments containing a narrow (about 4") iron formation. Although Almandite garnet is found to a small extent in the shear zones, it is the characteristic wall rock alteration of these zones. An attempt has been made to show that the elongated "quartz pebbles” which occur in the shear zones, are of hydrothermal origin. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate