Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa
Bibliography: pages 174-194.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Geological Sciences
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613244799057920 |
|---|---|
| access_status_str | Open Access |
| author | Lawless, Patrick Joseph |
| author2 | Gurney, John J |
| author_browse | Gurney, John J Lawless, Patrick Joseph |
| author_facet | Gurney, John J Lawless, Patrick Joseph |
| author_sort | Lawless, Patrick Joseph |
| collection | Thesis |
| description | Bibliography: pages 174-194. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/22205 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:04.194Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| 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:11427/22205 Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa Lawless, Patrick Joseph Gurney, John J Geochemistry Bibliography: pages 174-194. The xenolith suite from the Bultfontein Mine, Kimberley, South Africa, comprises lherzolites, harzburgites, and wehrlites with and without garnet; garnet olivine websterites and polymict peridotites. Many of the peridotites contain phlogopite and/or potassic-richterite which are interpreted as metasomatic minerals together with ilmenite, rutile, sulphides, and rare zircon. The variations in texture, mineral chemistry, equilibration conditions and bulk chemistry are described. No diamond-bearing assemblages have been found. The textures vary from coarse to porphyroclastic and to fluidal mosaic and laminated and disrupted. The deformed xenoliths have textures which may vary over distances of centimetres in individual specimens. The range of textures is greater than that reported for the xenoliths from Thaba Putsoa and Matsoku kimberlite pipes of northern Lesotho. There is no clear correlation between texture, mineral chemistry, or bulk chemistry in the Bultfontein xenoliths. Temperatures and pressures of equilibration have been calculated using three different geothermometers and three geobarometers, and the uncertainties involved in their application have been discussed. Some of the deformed xenoliths appear to have equilibrated at marginally higher temperatures and pressures than the undeformed xenoliths. The four-phase garnet lherzolites do not define a "perturbed geotherm" similar to that found in several other kimberlite localities in southern Africa and elsewhere. 2016-10-19T13:37:31Z 2016-10-19T13:37:31Z 1978 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/22205 eng application/pdf application/pdf Department of Geological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Geochemistry Lawless, Patrick Joseph Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa |
| thesis_degree_str | Doctoral |
| title | Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa |
| title_full | Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa |
| title_fullStr | Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa |
| title_full_unstemmed | Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa |
| title_short | Some aspects of the mineral chemistry of the peridotite xenolith suite from the Bultfontein Diamond Mine, Kimberley, South Africa |
| title_sort | some aspects of the mineral chemistry of the peridotite xenolith suite from the bultfontein diamond mine kimberley south africa |
| topic | Geochemistry |
| url | http://hdl.handle.net/11427/22205 |
| work_keys_str_mv | AT lawlesspatrickjoseph someaspectsofthemineralchemistryoftheperidotitexenolithsuitefromthebultfonteindiamondminekimberleysouthafrica |