Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite

 

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dc.contributor.advisor Reid, A M en_ZA
dc.contributor.author Garvie, Owen George en_ZA
dc.date.accessioned 2016-10-18T11:30:23Z
dc.date.available 2016-10-18T11:30:23Z
dc.date.issued 1981 en_ZA
dc.identifier.citation Garvie, O. 1981. Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/22168
dc.description Bibliography: p. 118-132. en_ZA
dc.description.abstract The examination and interpretation of surface features on pyrope, picroilmenite and chrome diopside from kimberlite gives valuable information on the history of these minerals both during and after kimberlite emplacement. Descriptions and scanning electron photo-micrographs of surface features observed on these mantle-derived minerals from thirty-four kimberlites having a global distribution are presented. Careful observations established the age relationships between the different surface features on each of the minerals studied, and enabled the compilation of a classification scheme of these surface features. This proposed classification scheme is based on the chronological sequence of formation of th.e surface morphological characteristics observed on these mantle-derived minerals and separates thoie which are formed during kimberlite emplacement (primary features), from those resulting ffom in-situ weathering and diagenetic etch processes (secondary features). The mineralogy, structure and mode of formation of kelyphite are discussed in relation to kimberlite emplacement. Pyrope encrusted by kelyphite is commonly found in most garnet peridotites, some eclogite xenoliths from kimberlite, as well as a few garnet-bearing serpentinites. Although the relative abundance of kelyphite-encrusted garnet varies from one kimberlite to another, kelyphite shells are most commonly developed on mauve garnets which are most probably derived from peridotite and are least commonly found on orange varieties from eclogites. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Geological Sciences en_ZA
dc.title Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Geological Sciences en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Garvie, O. G. (1981). <i>Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/22168 en_ZA
dc.identifier.chicagocitation Garvie, Owen George. <i>"Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1981. http://hdl.handle.net/11427/22168 en_ZA
dc.identifier.vancouvercitation Garvie OG. Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1981 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22168 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Garvie, Owen George AB - The examination and interpretation of surface features on pyrope, picroilmenite and chrome diopside from kimberlite gives valuable information on the history of these minerals both during and after kimberlite emplacement. Descriptions and scanning electron photo-micrographs of surface features observed on these mantle-derived minerals from thirty-four kimberlites having a global distribution are presented. Careful observations established the age relationships between the different surface features on each of the minerals studied, and enabled the compilation of a classification scheme of these surface features. This proposed classification scheme is based on the chronological sequence of formation of th.e surface morphological characteristics observed on these mantle-derived minerals and separates thoie which are formed during kimberlite emplacement (primary features), from those resulting ffom in-situ weathering and diagenetic etch processes (secondary features). The mineralogy, structure and mode of formation of kelyphite are discussed in relation to kimberlite emplacement. Pyrope encrusted by kelyphite is commonly found in most garnet peridotites, some eclogite xenoliths from kimberlite, as well as a few garnet-bearing serpentinites. Although the relative abundance of kelyphite-encrusted garnet varies from one kimberlite to another, kelyphite shells are most commonly developed on mauve garnets which are most probably derived from peridotite and are least commonly found on orange varieties from eclogites. DA - 1981 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1981 T1 - Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite TI - Surface textures on pyrope, picroilmenite and chrome diopside from Kimberlite UR - http://hdl.handle.net/11427/22168 ER - en_ZA


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