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PESA QLD : Technical Luncheon, 24th August – Post-Graduate Student Presentations

Thursday, August 24, 2017 @ 12:15 - 14:00

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This month, PESA QLD is delighted to bring you a selection of three short presentations from PhD and Masters students.  Katherine Gioseffi, The PESA Scholarship winner from 2016 will be presenting, along with Nicholas Dyriw and Pascal Asmussen.


Presentation 1:
Katherine Gioseffi, QUT Masters student and winner of 2016 PESA Scholarship
Gypsum dehydration: The interplay between nanoporosity formation, dehydration and phase transformation.
Presentation 2:
Nicholas Dyriw, QUT PhD student
Recent eruptions at a volcanic edifice associated with a modern deep sea Cu-Au ore deposit
Presentation 3:
Pascal Asmussen, QUT PhD student
Revision of the rift volcanics of the Devonian Adavale Basin (central QLD), insights from geochronology and geochemistry
Royal on the Park Hotel, Cnr Alice and Albert Streets, Brisbane QLD 4000
Date & Time:
24th August 2017,    12:15 pm
Presentation Abstracts:

Gypsum dehydration: The interplay between nanoporosity formation, dehydration and phase transformation. 
Fluids liberated through the dehydration of hydrous minerals play a major role in the occurrence of earthquakes in subduction zones and active fault zones as well as during metasomatism and metamorphism of crustal rocks. Gypsum is an ideal experimental analogue for hydrous minerals found in fault zones and subducting slabs due to its relatively low dehydration temperatures (~100°C). Previous studies on gypsum dehydration use ‘black-box’ experimental set-ups where reaction progression is assessed using proxy measurements. This talk will discuss several novel in-situ gypsum dehydration experiments performed using X-ray radiation. These techniques allow real-time monitoring of porosity evolution and phase transitions.


Recent eruptions at a volcanic edifice associated with a modern deep sea Cu-Au ore deposit.
This talk will discuss the integration a unique suite of geophysical and petrological data to better understand the nature of the edifice. To understand the timing of magmatic processes are related to ore formation, a better understanding of the eruptive styles is necessary to provide a framework for on-going petrological investigation. This work has identified volcanic facies associated with this edifice that may have implications for ore genesis and preservation. Critically, these features are likely to be preserved in the geologic record may assist exploration efforts for ancient volcanic hosted copper gold systems on land.


Revision of the rift volcanics of the Devonian Adavale Basin (central QLD), insights from geochronology and geochemistry

The subsurface Devonian Adavale Basin has been target of petroleum exploration during the 1960s, establishing a reasonable dataset of partly cored stratigraphic wells and seismic surveys. However, there is no consensus on the tectonic setting of the basin within the framework of the Thomson Orogen. I will present results from geochemical and geochronological work on volcanic rocks of the initial rifting sequence of the Adavale Basin and give some insight into a poorly constrained era of the Thomson Orogen.


Tickets can be purchased below.
Early bird pricing will remain available up until Monday 21st August, 12:00 Midday.


Presenter Biographies:

Katherine Gioseffi
Kat has a degree in Earth Science and is currently studying her Masters by Research at QUT. Her project focuses on novel in-situ dehydration experiments performed on gypsum discs using X-ray scattering techniques performed at the Australian Synchrotron. This technique allows to track the dehydration reaction in-situ in real-time using: [1] Wide-angle X-ray Scattering (WAXS), which monitors in-situ changes in mineral phase; and [2] Small-angle X-ray Scattering (SAXS), which monitors in-situ changes in nano-porosity.
Nicholas Dyriw
Nick is currently a PhD candidate at Queensland University of Technology (QUT). Before starting his PhD, he has worked for land-based and offshore exploration companies with a focus on base metal and gold exploration. Nick’s PhD project centres on linking magmatic processes and volcanic eruptions with modern deep-sea copper and gold ore deposits. With the aim to determine what magmatic processes play a significant role in the evolution of ore-related volcanic edifices and how these processes may affect or control the mineralising nature of the volcanic system. His project site is Suzette, a volcanic edifice in the East Manus Basin, Bismarck Sea, PNG. Suzette is associated with the world’s first deep sea copper and gold deposit, Solwara 1, currently under development for mining by Nautilus Minerals. This project utilizes a variety of tools and techniques such as: GIS analysis, remotely operated submarine vehicle footage, submarine remote sensing data, and petrology. This enables a unique integration of volcanology and ore deposit research.
Pascal Asmussen (BSc, MSc)
Pascal acquired a Bachelor of Science (Geography) on spatial modelling of rock mechanics; followed by a Master of Science which focused on the development of a semi-automatic approach in digital thin section image segmentation. Both of these degrees were completed at the Universität Hamburg, Germany. In 2016, he moved to Brisbane to commence his PhD project analysing subsurface Devonian cover basins across Queensland, and their implications for the stabilisation of the Thomson Orogen. His PhD research is part of the ARC linkage project “The missing link in the Tasmanides” led by Professor Bill Collins (UON), Associate Professor Scott Bryan (QUT) and Dave Purdy (GSQ).


Thursday, August 24, 2017
12:15 - 14:00


Royal on the Park
Corner Alice and Albert Streets, Brisbane QLD, 4000


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