A geochemical and morphological investigation of placer gold grains from the southern Seward Peninsula, Alaska : implications for source and transport mechanisms
- Gauntlett, Ernest John Herbert
- Authors: Gauntlett, Ernest John Herbert
- Date: 2015
- Subjects: Placer deposits -- Alaska -- Seward Peninsula , Gold alloys , Gold mines and mining -- Alaska -- Seward Peninsula , Geochemical surveys -- Alaska -- Seward Peninsula , Trace elements -- Alaska -- Seward Peninsula , Drift -- Alaska -- Seward Peninsula , Gold -- Standards of fineness
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5085 , http://hdl.handle.net/10962/d1018202
- Description: [Partial abstract]: This study presents the first detailed geochemical and morphological characterisation of gold grains from the southern Seward Peninsula, Alaska, a region with significant historical and on-going placer gold mining. Quantitative Au, Ag, Hg, and Cu data are presented for gold grains from eleven sites. Additionally, quantitative Te, W, As, and Sb trace element data are presented for gold grains from ten of the eleven sites. Although it is acknowledged that quantitative trace element analysis of gold grains is a relatively new endeavour, the limited trace element data obtained in this study suggest that trace element analysis could be useful for characterising gold sources on the southern Seward Peninsula. Major and minor element geochemical profiling is sufficient at differentiating between sites from regional provenance systems but insufficient at differentiating between sites within a single system. Differentiating among sites within a single system will likely require microchemical analysis of mineral inclusions and analysis of trace element signatures.
- Full Text:
- Date Issued: 2015
- Authors: Gauntlett, Ernest John Herbert
- Date: 2015
- Subjects: Placer deposits -- Alaska -- Seward Peninsula , Gold alloys , Gold mines and mining -- Alaska -- Seward Peninsula , Geochemical surveys -- Alaska -- Seward Peninsula , Trace elements -- Alaska -- Seward Peninsula , Drift -- Alaska -- Seward Peninsula , Gold -- Standards of fineness
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5085 , http://hdl.handle.net/10962/d1018202
- Description: [Partial abstract]: This study presents the first detailed geochemical and morphological characterisation of gold grains from the southern Seward Peninsula, Alaska, a region with significant historical and on-going placer gold mining. Quantitative Au, Ag, Hg, and Cu data are presented for gold grains from eleven sites. Additionally, quantitative Te, W, As, and Sb trace element data are presented for gold grains from ten of the eleven sites. Although it is acknowledged that quantitative trace element analysis of gold grains is a relatively new endeavour, the limited trace element data obtained in this study suggest that trace element analysis could be useful for characterising gold sources on the southern Seward Peninsula. Major and minor element geochemical profiling is sufficient at differentiating between sites from regional provenance systems but insufficient at differentiating between sites within a single system. Differentiating among sites within a single system will likely require microchemical analysis of mineral inclusions and analysis of trace element signatures.
- Full Text:
- Date Issued: 2015
The potential of a stratified ontology for developing materials in community-based coastal marine environmental education processes
- Authors: Davies, Siân May
- Date: 2009
- Subjects: Ontology Critical realism Environmental education -- South Africa -- Eastern Cape Sustainable development -- South Africa -- Eastern Cape Community-based conservation -- South Africa -- Eastern Cape Marine resources development -- South Africa -- Eastern Cape Marine ecology -- Study and teaching -- South Africa -- Eastern Cape Teaching -- Aids and devices -- South Africa Poor -- Education -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1708 , http://hdl.handle.net/10962/d1003591
- Description: This study set out to explore the possibilities that the Critical Realist concept of a stratified ontology might have for environmental learning and materials development processes. This involved processes of ongoing contextual profiling; the use of picture-based resources and storytelling to support the engagement with the marine harvesting contexts of the villages of Hamburg and Ngqinisa, in the former Ciskei. At the heart of the study was the process of uncovering the empirical, the actual and the real in the context of a community of coastal marine harvesters whose lives and livelihoods are affected by poverty and a history of inequality, and more recently by issues such as HIV/AIDS. Their stories of existing practice changed as we engaged with picture-based narratives, gaining depth and focus in relation to sustainability issues. The learning processes associated with and emerging out of the research processes were enhanced through abductive use of metaphors and graphic illustrations, and through intra- and inter community exchanges, again using picture based narratives. As the study unfolded, the development of environmental education materials receded. Focus turned to how conceptual abstraction processes (of abduction (metaphor) and retroduction) and the stratified ontological framework allowed for learning across epistemological divides.
- Full Text:
- Date Issued: 2009
- Authors: Davies, Siân May
- Date: 2009
- Subjects: Ontology Critical realism Environmental education -- South Africa -- Eastern Cape Sustainable development -- South Africa -- Eastern Cape Community-based conservation -- South Africa -- Eastern Cape Marine resources development -- South Africa -- Eastern Cape Marine ecology -- Study and teaching -- South Africa -- Eastern Cape Teaching -- Aids and devices -- South Africa Poor -- Education -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1708 , http://hdl.handle.net/10962/d1003591
- Description: This study set out to explore the possibilities that the Critical Realist concept of a stratified ontology might have for environmental learning and materials development processes. This involved processes of ongoing contextual profiling; the use of picture-based resources and storytelling to support the engagement with the marine harvesting contexts of the villages of Hamburg and Ngqinisa, in the former Ciskei. At the heart of the study was the process of uncovering the empirical, the actual and the real in the context of a community of coastal marine harvesters whose lives and livelihoods are affected by poverty and a history of inequality, and more recently by issues such as HIV/AIDS. Their stories of existing practice changed as we engaged with picture-based narratives, gaining depth and focus in relation to sustainability issues. The learning processes associated with and emerging out of the research processes were enhanced through abductive use of metaphors and graphic illustrations, and through intra- and inter community exchanges, again using picture based narratives. As the study unfolded, the development of environmental education materials receded. Focus turned to how conceptual abstraction processes (of abduction (metaphor) and retroduction) and the stratified ontological framework allowed for learning across epistemological divides.
- Full Text:
- Date Issued: 2009
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