Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/100134
Type: Thesis
Title: A sequence stratigraphic approach to interpreting the δ13C record using an Early Cambrian carbonate platform
Author: Kenefick, C. M.
Issue Date: 2013
School/Discipline: School of Physical Sciences
Abstract: The Early Cambrian Wilkawillina Platform displays a continuous platform to basin facies that enables physical time surfaces to be used to compare roughly synchronous δ13C values of carbonates to test their lateral variation in range. The two sections measured showed a progression from shallow water deposition of the Woodendinna Dolomite to deeper water deposition of the Oraparinna Shale in the basin while biostromes of Archaeocyatha developed on the shelf. Using a sequence stratigraphic approach, the sections were correlated using the time significant sequence boundaries shared between the two sections. Correlated by the sequence boundaries, stable isotopes (δ13C and δ18O) were then compared and found to be out of phase with each other. A chronostratigraphic diagram shows that carbonate deposition is not continuous over time and therefore, the δ13C record is episodic. This approach emphasises the punctuated nature of the record and the predominance of depositional hiatus in sections, while previous chemostratigraphic studies have assumed the δ13C record to be largely continuous through time when making correlations.
Dissertation Note: Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2013
Where: Adelaide Geosyncline, Flinders Ranges, South Australia
Keywords: Honours; Geology; sequence stratigraphy; δ13C record; carbonate platforms; Wilkawillina Platform; Early Cambrian; stratigraphic correlation; chemostratigraphy
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
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