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The geochemistry of the Gough Island basalts and their mantle source region
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Geological Sciences
2014
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| _version_ | 1867614174818861056 |
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| access_status_str | Open Access |
| author | Long, David J |
| author2 | Le Roex, Anton |
| author_browse | Le Roex, Anton Long, David J |
| author_facet | Le Roex, Anton Long, David J |
| author_sort | Long, David J |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/4209 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:47:51.481Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Geological Sciences |
| publisherStr | Department of Geological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/4209 The geochemistry of the Gough Island basalts and their mantle source region Long, David J Le Roex, Anton Class, Cornelia Geological Sciences Includes bibliographical references. Ten Gough Island primary magma compositions were calculated for use in constrained forward modelling. The primary magma compositions were calculated by the addition of 14-28% clinopyroxene and equilibrium olivine, in equal proportions, back into the primitive lava compositions in 1 % increments until an Mg# of 69 was reached. Constrained forward modelling methods were used in determining the chemical and mineralogical nature of the mantle source region as well as the required melting parameters required in producing the Gough Island suite of lavas. The models indicate that the full compositional range, as well as the crossing REE patterns at Dy, can be produced through ~5-8% equilibrium melting of a mantle source region composed of garnet lherzolite or ~30-50% melting of a garnet pyroxenite source. 2014-07-30T17:26:33Z 2014-07-30T17:26:33Z 2008 Master Thesis Masters MSc http://hdl.handle.net/11427/4209 eng application/pdf Department of Geological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Geological Sciences Long, David J The geochemistry of the Gough Island basalts and their mantle source region |
| thesis_degree_str | Master's |
| title | The geochemistry of the Gough Island basalts and their mantle source region |
| title_full | The geochemistry of the Gough Island basalts and their mantle source region |
| title_fullStr | The geochemistry of the Gough Island basalts and their mantle source region |
| title_full_unstemmed | The geochemistry of the Gough Island basalts and their mantle source region |
| title_short | The geochemistry of the Gough Island basalts and their mantle source region |
| title_sort | geochemistry of the gough island basalts and their mantle source region |
| topic | Geological Sciences |
| url | http://hdl.handle.net/11427/4209 |
| work_keys_str_mv | AT longdavidj thegeochemistryofthegoughislandbasaltsandtheirmantlesourceregion AT longdavidj geochemistryofthegoughislandbasaltsandtheirmantlesourceregion |