1 10 1 https://theses.otagogeology.org.nz/files/original/661b916fd3e428c07d4e8dbfd3ab74a7.pdf 18129e92b7b6a5382d8aa8dc7c174db6 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Geology theses OU Geology thesis Thesis or dissertation completed by University of Otago Geology students Location WKT (WGS84) The location stored in WKT (WGS84) format POLYGON ((167.898165306076663 -46.367765882808179,167.894896613933213 -46.402748908665671,167.719972685713515 -46.395975449319167,167.725867057603693 -46.34385124750699,167.899327273282239 -46.355314202539347,167.898165306076663 -46.367765882808179)) Author last name Last name of the Author Spencer Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Reay, A. Abstract The Abstract for this thesis Between Pahia Peninsula and Kawakaputa Bay to the East, a S.E. trending arm of crystalline rock separates Foveaux Strait from a strip of fossil estuarine clays and sands. To the East, Oraka Peninsula performs the same function. The two topographic features are the result of adamolite and granodiorite masses respectively intruding a previously emplaced gabbroic mass composed mostly of norite. The following phenomena are thought to have occurred. The formation of an auroole (probably no more than 200' thick) at the contact between the norite and the intruding acid body. Hybrid rocks are formed due to the metasomatic hydrothermal effect on the norite of emanations from the acid body. Mechanical mixing in places causes a very distinctive microscopic lithology which is, however, difficult to distinguish from in hand specimen, those rocks that have undergone 'in-situ' metasomatism. The contamination of the acid magma by reciprocal reaction between the magma, and the myriad basic inclusions within the magma, that are thought to have been derived from the noritic wall rock. The acid rocks(at Wakapatu at least) are believed to have been basified from an original adamellite gradationally through to a diorite. (these are so named on the basis of(Or/0r+Ab), because it is thought that orthoclase, in this case, is a most important mineral. Its concentration is indicative of.tho processes at work) The presence of a large regional batholith (probably equivalent to Anglem Complex rocks), intruding norites(Bluff Complex probably) for the whole Longwood-Wakapatu-Pahia-Bluff-Stewart Island-Ruapuke Island region North of the Median Tectonic Line, and possibly extending much further North than the Longwoods,is postulated. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Wakapotu Oraka Peninsula Thesis description Number of pages, maps, CDs, etc. 98 leaves, photos, map(folded in pocket) 26 cm. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context 1971Spencer Creator An entity primarily responsible for making the resource Spencer, PL Date A point or period of time associated with an event in the lifecycle of the resource 1971 Title A name given to the resource Igneous Instrusives at Wakapatu and Oraka Peninsula, Coastal Southland. Subject The topic of the resource Map Igneous petrology Mineralogy adamellite dyke granodiorite metasomatism norite intrusion