1 10 1 https://theses.otagogeology.org.nz/files/original/0e1e1ec820e7c21d4d2237f0ba755567.pdf fd30b88dc04796a94fc4d23f448292cf 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 MULTIPOLYGON (((161.383436482000207 -77.919436589999975,161.320118892000153 -77.919158685999918,161.205761425000105 -77.909889900999985,161.13808984500011 -77.895507576999961,161.308470835000122 -77.876751113999958,161.466131949000157 -77.887138447999988,161.461067169000131 -77.906220681999955,161.383436482000207 -77.919436589999975)),((161.329310575000051 -77.784787809999941,161.361412126000147 -77.801952201999953,161.270173059000058 -77.79695523099997,161.186313240000146 -77.782911683999941,161.132174511000073 -77.757237762999964,161.160584150000119 -77.745171394999943,161.175481151000071 -77.733654421999972,161.279905478000018 -77.727844431999983,161.358386059999987 -77.725859692999961,161.461055461000143 -77.718721732999924,161.528683806000146 -77.725822257999923,161.56037269000015 -77.743303821,161.549591209000056 -77.760440374999973,161.480573242000162 -77.768882044999955,161.443320301000085 -77.774237619999951,161.375383157000101 -77.772827494999945,161.348964045000116 -77.772464921999983,161.329310575000051 -77.784787809999941)),((159.898428696000082 -76.693281530999968,159.826828304000117 -76.710282864999954,159.752241341000087 -76.733176196999977,159.674044544000054 -76.747047413999951,159.611263523000048 -76.749911027999985,159.553755766000108 -76.77014556499995,159.421239433000125 -76.783956376999953,159.44608696700007 -76.749629385999981,159.540353497000069 -76.719223942999989,159.51115247600012 -76.706966754999939,159.542038242000189 -76.682423834999938,159.573764958000112 -76.655908552999932,159.582180879000077 -76.621753265999956,159.61456277500011 -76.607105750999963,159.647219270000051 -76.630935097999981,159.648918787000127 -76.646461926999962,159.609773972000113 -76.670797142999959,159.615069132000059 -76.684072296999943,159.688270196000047 -76.69391421499995,159.722031394000055 -76.683975691999933,159.789917102000175 -76.665153827999958,159.777566368000095 -76.649247919999922,159.794598991000015 -76.630207698999982,159.818457498000129 -76.613800911999988,159.862755748000041 -76.616542897999977,159.91155142100007 -76.63603461699995,159.901593775000038 -76.657714862999967,159.926228124000176 -76.671565966999921,159.898428696000082 -76.693281530999968))) Author last name Last name of the Author Airoldi Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student White, J.D.L. Cooper, Alan Zanella, E. Abstract The Abstract for this thesis Solidified remnants of major magma pathways, and localized clusters of smaller intrusive sheets, are exposed in the mountains of South Victoria Land, Antarctica. Together the intrusions represent the shallowest 2 km of the plumbing system for the Early Jurassic Ferrar Large Igneous Province. Three sites were investigated: Allan Hills exposes the shallowest portion (<1 km) of the Ferrar plumbing system, whereas Terra Cotta Mountain and Solitary Rocks represent a paleodepth of ≥2 km. Ferrar Dolerite sills were emplaced into a highly stratified and vertically anisotropic sedimentary sequence. They evolved as interconnections of shallowly dipping Ferrar Dolerite sheets and sills, or ‘transgressive intrusions’. These intrusions represent the preferred mode of propagation of magma in the Ferrar LIP and are observed even at shallow depths. The largest sills, such as the Basement Sill exposed at Solitary Rocks, represent major magma pathways that were continuously injected during the Ferrar magmatism, and which transported magma for long distances through rock now exposed in the Transantarctic Mountains. At Terra Cotta Mountain, and several other locations in South Victoria Land, clusters of igneous sheets formed thanks to high localized tensile and shear stresses between intrusions propagated along adjacent stratigraphic levels (bedding planes). Within 1 km of the surface (Allan Hills), sills propagated very close to, or even intersected, the surface. The injection of magma into fractures formed in a roof of country rock, which was buoyed up above such shallow-seated sills, resulted in clusters of segmented intrusions, with both irregular and transgressive geometries, and complex mutual relationships. There are no significant petrological differences among intrusions exposed in these different parts of the Ferrar system. Magma flow paths inferred from rock magnetic fabrics indicate a strong connection between magmatic flow directions and complex intrusion geometries, and the general heterogeneity of both is inferred to indicate that magma created its own set of fractures both across the Beacon sedimentary rocks. The model developed for the Ferrar plumbing system on the basis of the above observations and inferences is, at least between 0 and 2 km depth below the Jurassic paleosurface, propagation of sills and connecting sheets of the Jurassic Ferrar LIP was essentially selfdriven, with little or no control from significant stresses acting on the lengthscale of the sill network. The principal structural controls on magma emplacement were provided by structural anisotropies within the Beacon sedimentary sequence. Finally, during evolution of the province the lowest sill intrusions became thickened at depth as the result of repeated injections of magma; this phenomenon favoured the lateral propagation of magma for long distances across the Ferrar LIP. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/616">http://hdl.handle.net/10523/616</a> OURArchvive access level Abstract Only Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Ferrar LIP South Victoria Land Antarctica Thesis description Number of pages, maps, CDs, etc. viii, 177 leaves : ill. (chiefly col.), col. maps ; 30 cm + 1 CD-ROM (4 3/4 in.) 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 2011Airoldi Creator An entity primarily responsible for making the resource Airoldi, Giulia Maria. Date A point or period of time associated with an event in the lifecycle of the resource 2011 Title A name given to the resource Magma injection dynamics in the shallow Ferrar LIP (South Victoria Land, Antarctica) Subject The topic of the resource Volcanology Igenous Petrology Antarctica Ferrar Large Igneous Province Rock magnetism