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Type: Thesis
Title: Geochemical characteristics of the lower Mesozoic sediments in the Mount Freeling area, northwestern Flinders Ranges
Author: Shahin, F.
Issue Date: 2012
School/Discipline: School of Physical Sciences
Abstract: An increased resource demand is largely due to the exhaustion of mineral deposits that are from predominantly shallow exposed settings, hence, in Australia there is a growing need for exploration techniques that provide an improved understanding of areas of deep transported cover. A case study conducted on lower Mesozoic sediments overlying the Mount Painter Inlier, NW Flinders Ranges (Mount Freeling area), using combined geochemical analysis, detrital zircon provenance data and Hylogger data aims to understand the source and characteristics of the transported cover. The Mount Painter Inlier consists of predominantly Mesoproterozoic sedimentary rocks and granites. Neoproterozoic sedimentary and volcanic sequences of the Adelaide Fold Belt form a cover up to 14km thick, therefore making the overlying lower Mesozoic sediments appropriate for refining the combined exploration techniques. Hylogger core scans conducted on the Recorder Hill, Ludbrook and Trinity Well Type Sections, NW of Mount Painter Inlier, show increases in the degree of crystallisation of kaolinite implying more proximal source regions moving stratigraphically up the profiles. U–Pb dating of detrital zircons shows a maximum depositional age of 122 Ma and 400 Ma for the Ludbrook and Recorder Hill samples respectively with the most influential sources being the Mount Painter Inlier and the Gawler Craton. HyLogger and Zircon data suggest that where there is a higher degree of crystallisation, there is a younger maximum depositional age and vice versa. The geochemical data set shows that when A-CN-K plots are used to plot the degree of feldspar weathering, samples tend to fall into groups and then these sub-groups can be used to recalculate anomalous and background levels for trace elements and major elements. Through the use of geochemistry, HyLogger and detrital zircon studies it has been shown that mineralisation zones can be targeted more cost effectively and efficiently.
Dissertation Note: Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2012
Where: Eromanga Basin, South Australia
Keywords: Honours; Geology; geochemistry; Flinders Ranges; Mount Freeling; HyLogger; detrital zircon; lower Mesozoic; regolith; deep basin; geochronology; sediment provenance
Description: This item is only available electronically.
Provenance: This 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:
Appears in Collections:School of Physical Sciences

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02wholeGeoHon.pdfWhole thesis (as available)5.06 MBAdobe PDFView/Open

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