Triassic Palynozone Recalibration Using CA-IDTIMS Dating

CA-IDTIMS dating of volcanic tuffs provides high-precision numerical ages for Australian Triassic palynological biozones. The dataset includes samples from Queensland, New South Wales, Tasmania, New Zealand, and Timor-Leste. The Australian Ocean Data Network published this research in April 2026.

Use Cases

• Recalibrate the age of Triassic palynozones using CA-IDTIMS dates from interbedded volcanic tuffs.
• Correlate Australian biozones with the international geologic timescale using numerical constraints for biozone boundaries.
• Update burial history models for petroleum exploration by integrating revised biozone ages from the Mungaroo Formation and other basins.
• Facilitate international correlation of dinocyst and spore-pollen zones using dates from the Murihiku Supergroup and Wailuli Formation.

Strengths

• Uses high-precision CA-IDTIMS dating on magmatic zircons from volcanic tuffs.
• Covers multiple geological formations across Queensland, New South Wales, Tasmania, New Zealand, and Timor-Leste.
• Builds on a previously published methodology for recalibrating Permian palynozones.

Limitations

• Primary data format is PDF, limiting direct machine-readability and analysis.
• Sample size and specific row count for dated tuffs are not provided.
• Geographic coverage is focused on specific Australian basins and two international locations.

Provenance

Source

Australian Ocean Data Network

Collection Method

Chemical Abrasion-Isotope Dilution Thermal Ionisation Mass Spectrometry (CA-IDTIMS) dating of volcanic tuffs interbedded with sedimentary rocks.

Time Range

Triassic Period

Freshness

Last updated in April 2026.

Geography

Queensland, New South Wales, Tasmania (Australia), New Zealand, Timor-Leste.