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The geology and petrology of the Marble Delta
Thesis (MSc) -- Stellenbosch University, 1973.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613955228172288 |
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| access_status_str | Open Access |
| author | Otto, J. D. T. |
| author2 | Verwoerd, W. J. |
| author_browse | Otto, J. D. T. Verwoerd, W. J. |
| author_facet | Verwoerd, W. J. Otto, J. D. T. |
| author_sort | Otto, J. D. T. |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc) -- Stellenbosch University, 1973. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/19875 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:44:21.913Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/19875 The geology and petrology of the Marble Delta Otto, J. D. T. Verwoerd, W. J. Stellenbosch University. Faculty of Science. Dept. of Earth Sciences. Davids, Ricardo Geology -- South Africa -- Marble River Delta Petrology -- South Africa -- Marble River Delta Theses -- Earth sciences Dissertations -- Earth sciences Thesis (MSc) -- Stellenbosch University, 1973. The Marble Delta is an area of approximately 40 sq. km in Natal (30°22' Long., 30°40' Lat.), occupied by Precambrian marble and associated granites. The deeply dissected country was geologically mapped on a scale of I : 6 000. A new lithostratigraphic classification of the metasediments is proposed. The base of the lowermost Le Joncguet Formation (composed of dolomitic marble and siliceous beds) is not exposed. This is followed by the predominantly ca.lcitic Oribi Formation with interbedded dolomite and graphitic layers. The marble is unconformably overlain by the Cherrywillingham Formation which comprises mainly amphibolite and granulite. The .three formations together constitute the Marble Delta Group. The main petrological units are calc-silicate marble, metaquartzite, dolomite marble, cluster serpen~ine marble and ce,lcite marble. Graphite layers are considered to have originated in situ from organic remains; there is occasional evidence of ionic transfer of carbon from this graphite by magmatic fluids. The common mineral assemblages are diopside + calcite + dolomite, tremolite + calcite + diopside + quartz, calcite + quartz + dolomite, forsterite + calcite + dolomite, plagioclase + cordierite + garnet + quartz, amphibole + clinopyroxene + plagioclase, hornblende + clinopyroxene + calcite, wollastor~te + calcite + diopside. Other minerals are graphite, antigorite, chrysotile, sphene, spinel, clinohumite, chondrodite, zoisite, clinozoisite, hedenbergite, phlogopite, ilmenite, hercynite, dravite, cummingtonite, talc, apatite, microcline, saponite. The mineral assemblages resulted from regional metamorphism and polyphase contact metamorphism. Doctoral 2012-03-07T09:54:58Z 2012-03-07T09:54:58Z 1973-02 Thesis http://hdl.handle.net/10019.1/19875 en_ZA Stellenbosch University 174 p. : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Geology -- South Africa -- Marble River Delta Petrology -- South Africa -- Marble River Delta Theses -- Earth sciences Dissertations -- Earth sciences Otto, J. D. T. The geology and petrology of the Marble Delta |
| title | The geology and petrology of the Marble Delta |
| title_full | The geology and petrology of the Marble Delta |
| title_fullStr | The geology and petrology of the Marble Delta |
| title_full_unstemmed | The geology and petrology of the Marble Delta |
| title_short | The geology and petrology of the Marble Delta |
| title_sort | geology and petrology of the marble delta |
| topic | Geology -- South Africa -- Marble River Delta Petrology -- South Africa -- Marble River Delta Theses -- Earth sciences Dissertations -- Earth sciences |
| url | http://hdl.handle.net/10019.1/19875 |
| work_keys_str_mv | AT ottojdt thegeologyandpetrologyofthemarbledelta AT ottojdt geologyandpetrologyofthemarbledelta |