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PESA SA/NT Technical Luncheon, Thursday 25th May 2017: IODP Expedition 369: Do Cenomanian-Turonian black shales in the western Ceduna sub-basin represent an expression of global oceanic anoxia at high southern latitudes?

Thursday, May 25 @ 12:00 - 14:00

Guest Speaker: Dr Simon Holford

Dr Simon Holford is a Senior Lecturer in Petroleum Geoscience and Director of Research at the University of Adelaide’s Australian School of Petroleum. He received a BSc (Hons) degree in Geology and Geography from Keele University in 2001, and a PhD from the University of Birmingham in 2006. He joined the University of Adelaide as an ARC Australian Postdoctoral Fellow in 2007. He has published ~70 papers on various aspects of sedimentary basin evolution and petroleum geoscience and attracted ~$5M in research funding from government and industry sponsors. He is the immediate past President of the SA/NT Branch of the Petroleum Exploration Society of Australia. Simon is the lead proponent of IODP Proposal 897 APL, which sought to drill one site through Cenomianian-Turonian boundary black shales in the western Ceduna sub-basin; this proposal was accepted as part of IODP Expedition 369 which will take place during September-November 2017.

PESA SA/NT Technical Luncheon

IODP Expedition 369: Do Cenomanian-Turonian black shales in the western Ceduna sub-basin represent an expression of global oceanic anoxia at high southern latitudes?

When: Thursday 25th May, 12pm for 12:30

Where: Club Braggs at The Public Schools Club, 207 East Terrace, Adelaide SA 5000

Speaker:
Dr Simon Holford, University of Adelaide

simon_volcano

Oceanic Anoxic Events (OAEs) record short-lived (<1 Myr) episodes of major environmental and paleoceanographic changes, manifested by enhanced marine organic carbon burial and linked to exceptionally warm climates. The Cenomanian-Turonian (c. 94 Ma) OAE2 represents one of the largest carbon cycle perturbations in Earth history, but most constraints on its stratigraphic and geochemical expression are based on observations from low and mid-latitudes, whereas evidence for the impact of OAE2 on marine chemistry, ecosystems and marine organic carbon burial at high latitudes is poorly understood. Perhaps the most compelling evidence for OAE2 at high southern latitudes is provided by dredge samples from the western Ceduna sub-basin. In 2007 Geoscience Australia recovered organic rich (TOC up to 6.9%), Cenomanian-Turonian marine black shales during dredging in the Great Australian Bight. During the Cretaceous the western Ceduna sub-basin was situated at the eastern tip of a partial seaway (the Australo-Antarctic Gulf). The dinocyst assemblages in the dredge samples are typical for OAE2 in both hemispheres, and extractable organic matter displays a strong anoxic marine signature. In late 2017, these organic rich black shales will be drilled as part of IODP Expedition 369, which will also target equivalent Cretaceous successions in the Mentelle Basin and Naturaliste Plateau offshore SW Australia. The recovery of section from a more restricted setting in an opening seaway in the western Ceduna sub-basin will allow a direct comparison with equivalent shales recovered during Expedition 369 at the gateway to the Australo-Antarctic Gulf, 1500 km to the west. This talk will cover the scientific objectives of the planned site in the western Ceduna sub-basin, the geological context of the site (which is seismically tied to the 2007 dredge samples) and the potential implications for our understanding of the geological evolution of the Ceduna sub-basin.

Dr Simon Holford is a Senior Lecturer in Petroleum Geoscience and Director of Research at the University of Adelaide’s Australian School of Petroleum. He received a BSc (Hons) degree in Geology and Geography from Keele University in 2001, and a PhD from the University of Birmingham in 2006. He joined the University of Adelaide as an ARC Australian Postdoctoral Fellow in 2007. He has published ~70 papers on various aspects of sedimentary basin evolution and petroleum geoscience and attracted ~$5M in research funding from government and industry sponsors. He is the immediate past President of the SA/NT Branch of the Petroleum Exploration Society of Australia. Simon is the lead proponent of IODP Proposal 897 APL, which sought to drill one site through Cenomianian-Turonian boundary black shales in the western Ceduna sub-basin; this proposal was accepted as part of IODP Expedition 369 which will take place during September-November 2017.

In addition to lunch, Club Bragg’s great range of drinks will be on offer:
Coopers – pale ale, sparkling ale, stout, mid strength and light.

Goodiesons – brown ale, pilsner, malboc, wheat, stout, red ale, pale ale
West End – Draught
Kersbrook Hills – Cider
House wine: GMH Shiraz and 90 mile Sav Blanc

Please note that bookings will close at 5pm on Monday 22nd May.

Details

Date:
Thursday, May 25
Time:
12:00 - 14:00
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Venue

Club Bragg’s at the Public Schools Club
207 East Terrace, Adelaide, South Australia 5000 Australia
Phone:
82233213
Website:
http://www.publicschoolsclub.com.au/