The petrology of the alkali intrusive rocks from the Erongo volcanic complex

dc.contributor.advisor	Marsh JS	en_US
dc.contributor.advisor	Pirajno F	en_US
dc.contributor.author	Patel S	en_US
dc.date.accessioned	2013-07-02T14:10:43Z
dc.date.available	2013-07-02T14:10:43Z
dc.date.issued	1998	en_US
dc.identifier.uri	http://hdl.handle.net/11070.1/4453
dc.description.abstract	Abstract provided by author:	en_US
dc.description.abstract	In comparison with primordial mantle composition these alkali intrusive rocks are generally enriched in highly incompatible elements such as Nb and P, with low values for K and Ba	en_US
dc.description.abstract	Geochemical features observed show that the basanites are distinct from the other rock types. Their primitive character is reflected by high contents of Nb, Zr, Ba, Sr, and Y, and relatively low contents of Rb, Th and Pb. The tephrite-phonotephrite-tephriphonolite-phonolites represent products of a number of lineages related by similar parent compositions. Fractional crystallisation results in increasing SiO2, K2O, Al2O3 and Na2O, Rb, Th and Pb, but decreasing total iron, MgO, CaO, Ti02, Co, Cu, V, Ba and Sr	en_US
dc.format.extent	34 p	en_US
dc.language.iso	eng	en_US
dc.subject	Geology	en_US
dc.subject	Petrology	en_US
dc.title	The petrology of the alkali intrusive rocks from the Erongo volcanic complex	en_US
dc.type	thesis	en_US
dc.identifier.isis	F004-199299999999999	en_US
dc.description.degree	Grahamstown	en_US
dc.description.degree	South Africa	en_US
dc.description.degree	Rhodes University	en_US
dc.description.degree	B Sc Hons Geology	en_US
dc.masterFileNumber	2769	en_US

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