Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system
Dissertation (MSc)--University of Pretoria, 2020.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2020
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613563351203840 |
|---|---|
| access_status_str | Open Access |
| author2 | Lenhardt, Nils |
| author_browse | Lenhardt, Nils |
| author_facet | Lenhardt, Nils |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/75521 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:07.678Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/75521 Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system Lenhardt, Nils u14243734@tuks.co.za Viereck, Lothar Altigani, Mohammed Lotter, Francois Jacobus Petrus Geology Volcanology African volcanism Cenozoic volcanism Monogenetic Volcanism Complex plumbing system Open system dynamics UCTD Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-13 Natural and agricultural sciences theses SDG-15 Dissertation (MSc)--University of Pretoria, 2020. The Bayuda monogenetic volcanic field (BMVF) is an active, understudied Holocene volcanic field located in the great bend of the Nile, Sudan. The BMVF’s location provides an excellent opportunity to study monogenetic volcanism in an African context. Recent studies have shown that monogenetic volcanoes can have more intricate plumbing systems than initially thought. The project sets out to provide a general description and genesis of the BMVF emphasising the plumbing system. Petrography reveals olivine and clinopyroxene as the main phenocryst phases in a groundmass of predominantly plagioclase and subordinate pyroxene and olivine microcrysts. A significant amount of crystals display pronounced disequilibrium textures alongside sector and oscillatory zoning. Major and trace elements indicate that the BMVF is sodic-alkaline, resembling an OIB signature. Melting models that use partitioning coefficients of Zr, Hf and Nb in phenocrysts estimate 2-4% melting of a metasomatised garnet pyroxenite at a depth of ~2.8GPa as the source melt for the BMVF. The isotopic signature suggests mixing of an enriched mantle component (HIMU) and a depleted mantle component (DMM). Textural evidence alongside KD (Fe-Mg) of olivine indicate open system dynamics by revealing separate magma batches with differing times and depths of emplacement. Ni, Ca and Mn content of olivine, furthers the idea of open system dynamics by revealing processes of 1) ‘failed eruptions’, 2) magma mixing and 3) deep-seated fractionation. This project forms part of a growing number of studies that suggest complex plumbing system for monogenetic volcanic fields. bs2026 Geology MSc Unrestricted SDG-09: Industry, innovation and infrastructure SDG-13: Climate action SDG-15: Life on land 2020-07-31T08:06:45Z 2020-07-31T08:06:45Z 2020-10-01 2020-07 Dissertation Lötter, FJP 2020, Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/75521> S2020 http://hdl.handle.net/2263/75521 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Geology Volcanology African volcanism Cenozoic volcanism Monogenetic Volcanism Complex plumbing system Open system dynamics UCTD Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-13 Natural and agricultural sciences theses SDG-15 Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system |
| title | Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system |
| title_full | Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system |
| title_fullStr | Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system |
| title_full_unstemmed | Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system |
| title_short | Petrography and geochemistry of the Holocene monogenetic Bayuda Volcanic Field, Sudan: Insights into the magma plumbing system |
| title_sort | petrography and geochemistry of the holocene monogenetic bayuda volcanic field sudan insights into the magma plumbing system |
| topic | Geology Volcanology African volcanism Cenozoic volcanism Monogenetic Volcanism Complex plumbing system Open system dynamics UCTD Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-13 Natural and agricultural sciences theses SDG-15 |
| url | http://hdl.handle.net/2263/75521 |