Thesis (B.Sc.(Hons.)) --University of Adelaide, Department of Geology, 1966.

Thesis ((Hons). B.Sc.)--University of Adelaide, Dept of Economic Geology, 1961. / *Missing pages 50-64 (incl. Conclusion), all of Appendix A, and p. 1-5 of Appendix B*

Thesis (M.S.) -- University of Texas at Dallas, 2006. / Includes vita. Includes bibliographical references (leaves 62-63)

The Rayfield River copper property, 14 miles east of 70 Mile House in south central British Columbia, is underlain by a zoned syenite intrusion of late Triassic or early Jurassic age. The batholith was introduced into Mesozoic volcanics of the Nicola Group and has since been partially buried by Tertiary Basalt flows. The syenite grades from several hybrid phases at the country rock contact, through hornblende syenite, to leucocratic syenite and finally, to several centrally disposed pegmatitic bodies. Chalcopyrite and bornite, the major sulphides present, occur as inclusions within hornblende, along feldspar veinlets and along fractures in a concentric zone surrounding the leucrocratic syenite. On the property, the Rayfield River dissects to 400 feet, a gently rolling plateau. Glacial deposits are rare along the valley but commonly approach 50 feet in thickness on the plateau. Soil, lake sediment and water samples collected from these young and relatively unweathered surficial deposits are alkaline. Talus soils along the valley, however, are slightly more acidic, due to oxidation of primary sulphide minerals. The value of geochemical patterns in locating bedrock mineralization may be gauged by the success attained where sources of copper in bedrock are known. Three copper rich areas have been found. The most striking bedrock anomaly, near the center of the property, is outlined by copper-rich syenite float, stream sediment, lake water and sediment and talus soils. The second, along the northern half of the river valley, was found by stream sediment and talus surveys. The third bedrock anomaly, on the southeastern fraction of the property, is surrounded by float blocks relatively high in copper. Copper enrichment within glacial overburden is usually detectable over twice the area underlain by bedrock mineralization. Most secondary anomalies overly batholithic rocks, except in the south where rounded syenite float blocks, mineralogically and structurally similar to the most striking bedrock anomaly, were transported by a glacial Bonaparte River to where they now overly Nicola Volcanics. On a regional survey, boulder tracing and lake sediment or lake water sampling are most likely to indicate the presence of a mineralized intrusive. Detailed sampling reveals anomalous stream sediments of the Rayfield River and copper-rich talus along the valley sides of the northern half of the property. Detailed soil sampling is not suitable for outlining copper mineralization, as alkaline soil and thick overburden restrict movement of copper ions. Erratic high copper values are usually related to mineralized float or bedrock. Analysis of second year growth of Douglas fir or lodgepole pine apparently does not detect mineralization in bedrock. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

Thesis (Ph.D.)(Geology)--University of Pretoria, 2006. / Includes summary. Includes bibliographical references. Available on the Internet via the World Wide Web.

This work takes a look at some of the literature on calcretes and especially the problem of geochemical exploration in calcrete terrains. The conclusion that will be reached is that exploration in calcrete terrains is not futile and that provided the explorationist is aware of the types of calcrete and their genetic implications calcrete can be used as a sampling medium and anomalies can be detected through calcrete (p.1.) / KMBT_363 / Adobe Acrobat 9.54 Paper Capture Plug-in

Anomalous element distributions within the regolith result from chemical adjustments of the earth's surface to prevailing climatic conditions. Because of the lack of moisture in the arid environment, chemical equilibrium related to paleoclimates is largely maintained. Mechanical or clastic dispersion dominates arid weathering and hence the exploration approach is largely dictated by the degree of preservation of the paleoregolith. Arid environment geochemists thus have to contend with surface materials ranging from laterite and calcrete in areas where the imprint of aridity is minimal, to more conventional sample media such as bedrock, stream sediment and lithic soils in actively dissecting areas. Extraction techniques are designed specifically to isolate clastic dispersion trains. Thick mantles of aeolian and water-borne overburden characterise desert lowlands and are a challenge to the exploration geochemist. Techniques showing the most promise in these areas include groundwater geochemistry, vapour geochemistry, surface microlayer geochemistry, geobotany and biogeochemistry which attempt to isolate gaseous and weak hydromorphic, ore-related trace-element dispersions. Termite mound sampling yields convincing results and appears to be an under-utilised geochemical approach. / KMBT_363 / Adobe Acrobat 9.53 Paper Capture Plug-in

Thesis (doctoral)--Universität Göttingen, 1974. / Vita. Includes bibliographical references (p. 112-125).

Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics 1999. / Bibliography: leaves 233-260.

Thesis (M.S.)--University of Wisconsin--Madison, 1968. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.