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dc.contributor.advisorReay, Tony
dc.contributor.authorElder, Damon Jon
dc.date.available2017-11-17T01:35:28Z
dc.date.copyright1994
dc.identifier.citationElder, D. J. (1994). The geology of Flat Hill-Ocean Beach, Bluff Peninsula (Thesis, Bachelor of Science with Honours). University of Otago. Retrieved from http://hdl.handle.net/10523/7752en
dc.identifier.urihttp://hdl.handle.net/10523/7752
dc.descriptionDigital copy stored under Section 55 of the NZ Copyright Act.en_NZ
dc.description.abstractIn the Bluff area lower green schist facies Greenhills Group rocks of the Brook Street terrane derived from a Permian volcanic arc have been intruded by igneous bodies inducing contact metamorphism. Facies of contact metamorphism are observed as as pyroxene hornfels facies in assimilated xenoliths in a hybrid rock zone. Further out from the intrusions hornblende hornfelses are observed. At a distance of 800 m from the intrusive contacts albite-epidote facies of contact metamorphism are observed in metabasaltic dykes. Evidence for this facies comes from the mineral assemblages in the metabasalt dykes which have cut vertically through Greenhills Group metasediments very soon after the tilting of the Greenhills Group bedding associated with the intrusion of the large igneous bodies. The intrusive bodies are the Flat Hill gabbronorite and the Ocean Beach diorite which show a distinct difference in the bulk rock chemistry with the diorite appearing as a more evolved rock. Dyke intrusion of microgabbro, quartz diorite and hornblende pegmatite is part of late stage activity associated with the cooling of the large igneous bodies. Granitic dykes post date the intrusion of the large igneous bodies and the late stage dyke activity. The age of the Flat Hill gabbronorite is given as 265 Ma, the oldest recorded rocks of the Brook Street terrane.en_NZ
dc.language.isoenen_NZ
dc.publisherUniversity of Otago
dc.titleThe geology of Flat Hill-Ocean Beach, Bluff Peninsulaen_NZ
dc.typeThesis
dc.date.updated2017-11-17T01:35:06Z
thesis.degree.disciplineGeologyen_NZ
thesis.degree.nameBachelor of Science with Honoursen_NZ
thesis.degree.grantorUniversity of Otago
thesis.degree.levelHonours
otago.interloanyesen_NZ
otago.openaccessAbstract Onlyen_NZ
dc.rights.statementDigital copy stored under Section 55 of the NZ Copyright Act.
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