Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/96230
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dc.contributor.authorKavenagh, M. P.-
dc.coverage.spatialStuart Shelf - Eromanga Basin, South Australiaen
dc.date.issued2011-
dc.identifier.urihttp://hdl.handle.net/2440/96230-
dc.descriptionThis item is only available electronically.en
dc.description.abstractRegolith and sedimentary material overlying potentially enriched basement, is an ever-present obstacle in the highly prospective Olympic iron-oxide copper gold (IOCG) Province, South Australia. The Eromanga Basin, composed of Mesozoic sediments - Algebuckina Sandstone, Cadna-owie Formation and Bulldog Shale - overlies the northern extent of the Stuart Shelf, including the Olympic Dam IOCG province. The closest surface exposures of these sediments to Olympic Dam, is around the opal mining town of Andamooka. The formation and distribution of the precious opal has been previously linked to fluctuating water tables. However, oxidation of pyrite by fluctuating water table height, caused by intracontinental extensional faulting in the area, provides an enhanced interpretation linking opal distribution with the presence of jasper and silcrete lag. Extensional fault boundaries were identified through contrasting regolith and landform components observed from field mapping and remote sensing imagery. ASTER band ratios and relative absorption-band depth ratios complimented field observations with ratios primarily useful in distinguishing high reflectance homogenous mineral groups e.g. opal diggings and sand dunes. A regolith-landform map and digital elevation model over the area identifies the contrasting units, with opal diggings (digitised from ASTER imagery) strongly associated with higher elevations. The potential for secondary economic mineralisation is proposed for the Andamooka area. A source material (Olympic IOCG Province), transport mechanism (extensional duplex faulting), and potential trap rock (REDOX boundaries and varying permeability of Mesozoic units) all contributed to a prospective exploration model for the area.en
dc.language.isoenen
dc.subjectHonours; Geology; Andamooka; Eromanga Basin; Mesozoic sediments; Bulldog Shale; Algebuckina Sandstone; Cadna-owie Formation; ASTER satellite imagery; opalen
dc.titleLandscape evolution of Mesozoic sediments in the Andamooka area, incorporating remotely sensed ASTER data to facilitate future mineral explorationen
dc.typeThesisen
dc.contributor.schoolSchool of Physical Sciencesen
dc.provenanceThis electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the author of this thesis and do not wish it to be made publicly available, or you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legalsen
dc.description.dissertationThesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2011-
Appears in Collections:School of Physical Sciences

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