Louise Christian

PhD Student

Facsimile: +61 8 8303 4345
E-mail: lchristi@ncpgg.adelaide.edu.au

PhD Project:

Sequence stratigraphy, and foraminiferal biostratigraphy of the mid-Miocene of South Australia.*

*In collaboration with the Department of Geology and Geophysics, The University of Adelaide.

Commenced: 1995

Supervisor: Assoc Prof Simon Lang, Dr Brian McGowran, Dr Q Li

Project support: Primary Industries and Resources South Australia

Scholarship support: The University of Adelaide

This project forms part of a larger initiative by the University of Adelaide and the NCPGG to examine high resolution Tertiary sea level variations around the Australian continent. The mid-Miocene has been selected as the focus of this study, as it is considered to be the climatic optimum for the Neogene - thus, sediments from this period are widespread, displaying a variety of facies.

Foraminiferal analyses, including biozonation from planktonic species, and determination of palaeoenvironments largely from benthic faunas, have been carried out on core, side-wall core and cuttings samples from approximately twenty wells. Samples have been selected from the offshore sectors of the Gippsland, Bass, and Duntroon Basins. Significant changes have been made in many instances from the original biozonations, delineated in the 1970's and 80's.

Seismic and wireline log data from the three basins form the basis of sequence stratigraphic interpretations. Currently this work is being finalsed and the resulting interpretation has shown that significant surfaces correlate well with the proposed foraminiferal events.