Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/128255
Type: Thesis
Title: Geochemical fingerprinting of Australia’s youngest volcanoes: The Newer Volcanic Province, South Australia and Victoria
Author: Launder, J. D. G.
Issue Date: 2017
School/Discipline: School of Physical Sciences
Abstract: Traces of volcanic tephra, known as cryptotephra can provide an important isochronous marker that allows sedimentary archives to be aligned in space and time. However, this use of cryptotephra requires an understanding of the unique chemical fingerprint of the glass shards that originate from a particular volcano. Subsequently, this study investigates how the geochemical composition of volcanic centres varies between volcanic centres using collected samples from 9 volcanoes within the NVP, SA and Victoria. Analysis of geochemical data was obtained through laser ablation ICP-MS, to augment previously analysed electron microprobe data for 7 of the 9 sites. This study also investigates the viability of trace element analysis of cryptotephra grains through laser ablation as a useful addition to the major oxide analysis that can be carried out by electron microprobe. Statistical models of linear regression analysis, regression trees and KS-tests, were employed to identify the degree to which the volcanoes studied can be discriminated according to their elemental composition, on the basis of their major oxides and trace elements. The experimental results indicate that a quantifiable difference in major and trace elemental composition can be determined for all volcanic centres analysed except samples obtained from Warrnambool. Subsequently, this study has successfully identified 8 volcanoes with tephra and crypyotephra that possess specific geochemical fingerprints.
Dissertation Note: Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2017
Where: Newer Volcanic Province, South Australia & Victoria
Keywords: Honours; Geology; geochemical fingerprinting; Quaternary; Newer Volcanic Province; tephra; major oxides; trace elements; LA-ICP-MS
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: http://www.adelaide.edu.au/legals
Appears in Collections:School of Physical Sciences

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