PESA WA: Stretching or Flexing – A Review of the Triassic from the Northern Carnarvon and Roebuck Basins

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PESA WA invites you to our technical evening event on Tuesday 17 March at the Shoe Bar:

Stretching or Flexing – A Review of the Triassic from the Northern Carnarvon and Roebuck Basins

Presented by Alex Maftei (Curtin University)

In this technical session, Alex Maftei will present the results of his giant interpretation effort, which includes Triassic formation tops for 442 wells within a sequence stratigraphic framework, at least four key Triassic horizons, and more than 2300 faults interpreted in an extremely large seismic dataset. This study also incorporates basin-wide structural and isochron maps of the main Triassic sequences, depth conversion, and a velocity model that resulted in isopach maps, establishing the enormous thickness of the Triassic (up to 16 km). Forty wells were backstripped, and the total and tectonic subsidence were determined. The backstripped thickness at the beginning of the Jurassic was used to evaluate the flexural component of the subsidence (46–73% of the total subsidence). The elastic lithosphere thickness that best fits the data is between 20 and 30 km. The presentation will include notes on the wider development of Triassic volcanism, stratigraphic observations on the Triassic from the western Exmouth Plateau, such as a prograding deltaic system and incised valleys at the Ladinian-Carnian boundary, multi-erosional surfaces, and canyons in the Norian, and the earlier development of reefs in the Late Norian.

Ticket Prices:

Member (Early Bird until 5pm Tuesday 10 March): $40.00

Member: $50.00

Student Member: $20.00

Non-Member: $60.00

Early bird pricing ends Tuesday 10 March (1 week prior) at 5pm (AWST). All ticket sales close at 5pm Friday 13 March.  No further tickets will be allocated after this time.

Please note that this event will be held on Tuesday 17 March at the Shoe Bar (Shop GSO7 Yagan Square, 376 – 420 Wellington St, Perth WA 6050).